Checking to test compilation

DCPlugin.pri

@@ -11,7 +11,9 @@ HEADERS += $${PWD}/include/com.h \
     $${PWD}/include/sendWRcmd.h \
     $${PWD}/include/storeINdata.h \
     $${PWD}/include/tslib.h \
-    $${PWD}/include/shared_mem_buffer.h
+    $${PWD}/include/shared_mem_buffer.h \
+    $${PWD}/include/serial_port_thread.h \
+    $${PWD}/include/serial_port_worker.h
 
 SOURCES += $${PWD}/src/com.cpp \
     $${PWD}/src/controlBus.cpp \
@@ -22,4 +24,6 @@ SOURCES += $${PWD}/src/com.cpp \
     $${PWD}/src/sendWRcmd.cpp \
     $${PWD}/src/storeINdata.cpp \
     $${PWD}/src/tslib.cpp \
-    $${PWD}/src/shared_mem_buffer.cpp
+    $${PWD}/src/shared_mem_buffer.cpp \
+    $${PWD}/src/serial_port_thread.cpp \
+    $${PWD}/src/serial_port_worker.cpp

include/dcBL.h

@@ -78,7 +78,7 @@ uint8_t dcBL_getResult(void);
 
 
 #define RAW_BL_DATALEN      150
-void gpi_storeRawReceivedData(uint8_t  RdDlen, uint8_t *receivedData);
+void gpi_storeRawReceivedData(uint8_t  RdDlen, uint8_t const *receivedData);
 
 uint8_t epi_getRawReceivedData(uint8_t *receivedData);
     // retval=length, will be zeroed after first reading

include/sendWRcmd.h

@@ -148,21 +148,23 @@
 
 
 // highest priority
-#define CMDSTACKDEPTH   16
+// #define CMDSTACKDEPTH   16
 // means: up to 16 cmd can be stored. They are issued one by one every 100ms
 void sendWRcmd_clrCmdStack(void);
-bool sendWRcmd_setSendCommand0(uint16_t nextCmd);
+bool sendWRcmd_setSendCommand0(uint16_t nextCmd, uint8_t dat1=0, uint8_t dat2=0,
+                               uint8_t dat3=0, uint8_t dat4=0);
     // GUI or app sends a command to DC transfered by serial
 
-uint16_t sendWRcmd_getSendCommand0(void);
+uint16_t sendWRcmd_getSendCommand0(uint8_t *dat1=0, uint8_t *dat2=0,
+                                   uint8_t *dat3=0, uint8_t *dat4=0);
 
 // lower priority
-#define CMD4STACKDEPTH   8
+// #define CMD4STACKDEPTH   8
 void sendWRcmd_clrCmd4Stack(void);
 bool sendWRcmd_setSendCommand4(uint16_t nextCmd, uint8_t dat1, uint8_t dat2, uint8_t dat3, uint8_t dat4);
 uint16_t sendWRcmd_getSendCommand4(uint8_t *dat1, uint8_t *dat2, uint8_t *dat3, uint8_t *dat4);
 
-#define CMD8STACKDEPTH   4
+// #define CMD8STACKDEPTH   4
 void sendWRcmd_clrCmd8Stack(void);
 bool sendWRcmd_setSendCommand8(uint16_t nextCmd, uint8_t dat1, uint8_t dat2, uint16_t dat3, uint32_t dat4);
 uint16_t sendWRcmd_getSendCommand8(uint8_t *dat1, uint8_t *dat2, uint16_t *dat3, uint32_t *dat4);
@@ -171,7 +173,7 @@ uint16_t sendWRcmd_getSendCommand8(uint8_t *dat1, uint8_t *dat2, uint16_t *dat3,
 
 // lowest priority
 // wait for resonse before send next!
-bool sendWRcmd_setSendBlock160(uint8_t leng, uint8_t *buf);
+bool sendWRcmd_setSendBlock160(uint8_t leng, uint8_t const *buf);
 uint8_t sendWRcmd_getSendBlock160(uint8_t *leng, uint8_t *buf);
     // retval = *leng
 
@@ -179,7 +181,7 @@ void sendWRcmd_INI(void);
 
 
 
-uint8_t epi_store64ByteSendData(uint8_t length, uint8_t *buf);
+uint8_t epi_store64ByteSendData(uint8_t length, uint8_t const *buf);
     // HWapi writes data to be forwarded to DC and further to mdb-device
     // not batched! don't use twice within 100ms
 
@@ -211,7 +213,7 @@ uint8_t gpi_getUserOfSendingTextBuffer(uint8_t *para1, uint8_t *para2, uint8_t *
     // user=1: Text-Print is using this buffer
     //      2: QR-code-Printer is using this buffer
 
-#define     FDCMD_STACKDEPTH    16
+//#define     FDCMD_STACKDEPTH    16
 void sendFDcmd_clrStack(void);
 bool sendFDcmd_set(uint8_t nextWrCmd, uint8_t nextRdCmd, uint8_t blockNum, uint8_t dat1, uint8_t dat2, uint8_t dat3, uint8_t dat4);
     // write Command to memory, wait for transport
@@ -223,9 +225,9 @@ uint8_t check4FDshortCmd(void);
 uint8_t check4freeFDshortCmd(void);
     // returns number of free places in short-command stack
 
-#define     FDLONG_STACKDEPTH    16
+//#define     FDLONG_STACKDEPTH    16
 void longFDcmd_clrStack(void);
-bool longFDcmd_set(uint8_t nextWrCmd, uint8_t nextRdCmd, uint8_t blockNum, uint8_t length, uint8_t *data);
+bool longFDcmd_set(uint8_t nextWrCmd, uint8_t nextRdCmd, uint8_t blockNum, uint8_t length, uint8_t const *data);
     // write Command to memory, wait for transport
     // data buffer size always 64! data[64], padded with 0
 bool longFDcmd_get(uint8_t *nextWrCmd, uint8_t *nextRdCmd, uint8_t *blockNum, uint8_t *length, uint8_t *data);

include/serial_port_thread.h

@@ -0,0 +1,22 @@
+#ifndef SERIAL_PORT_THREAD_H_INCLUDED
+#define SERIAL_PORT_THREAD_H_INCLUDED
+
+#include <QThread>
+#include <QString>
+#include <QEventLoop>
+
+class SerialPortThread : public QThread {
+    Q_OBJECT
+
+    QEventLoop m_loop;
+public:
+    SerialPortThread(QObject *parent = nullptr);
+    virtual ~SerialPortThread();
+
+    virtual void run() override;
+
+    QEventLoop &getEventLoop() { return m_loop; }
+};
+
+
+#endif // SERIAL_PORT_THREAD_H_INCLUDED

include/serial_port_worker.h

@@ -0,0 +1,121 @@
+#ifndef SERIAL_PORT_WORKER_H_INCLUDED
+#define SERIAL_PORT_WORKER_H_INCLUDED
+
+#include <QObject>
+#include <QString>
+#include <QTimer>
+#include <QSerialPort>
+#include <QSerialPortInfo>
+#include <QThread>
+
+#include <assert.h>
+#include <condition_variable>
+#include <mutex>
+#include <queue>
+#include <deque>
+#include <iostream>
+#include <atomic>
+
+
+struct Command {
+    enum : uint16_t {PRIORITY_1, PRIORITY_2, PRIORITY_3, PRIORITY_4, END_MARK};
+    enum : uint16_t {QUIT_SENTINEL = 0x1000, SEND_BLOCK_SIZE = 160};
+    uint32_t m_priority;
+    uint16_t m_priorityClass;
+    uint16_t m_cmdId;
+    char    *m_sendBuffer;
+    char    *m_recvBuffer;
+    uint8_t m_sendBufferLength;
+    uint8_t m_recvBufferLength; // expected result length
+
+    static std::atomic<uint8_t> m_nextSendBufferIndex;
+    static std::atomic<uint8_t> m_nextRecvBufferIndex;
+    static char m_sendBuffers[256][SEND_BLOCK_SIZE];
+    static char m_recvBuffers[256][SEND_BLOCK_SIZE];
+
+    static uint32_t getNextCommandPriority(uint8_t cmdType);
+    static char *getNextSendBuffer();
+    static char *getNextRecvBuffer();
+
+ public:
+    Command(uint16_t cmdId, uint8_t sendBufferLength, uint8_t recvBufferLength, uint8_t priorityClass);
+    Command();
+
+    friend bool operator< (Command const& lhs, Command const& rhs) {
+        return lhs.m_priority < rhs.m_priority;
+    }
+
+    friend std::ostream& operator<< (std::ostream& os, Command const& cmd) {
+        return os << "{ " << cmd.m_priority << ", '" << cmd.m_priority << "' } ";
+    }
+};
+
+/// \brief SerialPortWorker
+///
+/// SerialPortWorker sends and receives data from serial port
+///
+class SerialPortWorker : public QThread {
+    Q_OBJECT
+
+    /// \brief Internal serial port.
+    QSerialPort m_serialPort;
+
+    /// \brief Internal serial port info.
+    QSerialPortInfo m_serialPortInfo;
+
+    /// \brief Flag indicating if serial port is opened.
+    bool m_serialPortOpened;
+
+    /// \brief Port name of serial port.
+    QString     m_portName;
+
+    /// \brief Baudrate of internal serial port.
+    enum QSerialPort::BaudRate m_baudRate;
+
+    std::priority_queue<Command, std::deque<Command>> m_sendQueue;
+    std::deque<Command> m_recvQueue;
+    std::mutex m_sendQueueMutex;
+    std::mutex m_recvQueueMutex;
+    std::condition_variable m_sendQueueCondVar;
+    std::condition_variable m_recvQueueCondVar;
+
+    std::atomic<uint32_t> m_bytesWritten;
+    std::atomic<uint32_t> m_bytesAvailable;
+
+    SerialPortWorker(QString portName, QSerialPort::BaudRate baudRate, QObject *parent = nullptr);
+
+    Command getNextCommand();
+    void insertResult(Command const &result);
+
+    enum : uint16_t {TIMEOUT = 100, WAIT_TIME_MAX = 1000};
+
+  public:
+    ~SerialPortWorker();
+
+    SerialPortWorker(SerialPortWorker const &) = delete;
+    void operator=(SerialPortWorker const &) = delete;
+
+    // serial port im plugin anlegen. erst dann kann getInstance() benutzt werden
+    static SerialPortWorker &getInstance(QString portName, QSerialPort::BaudRate baudRate, QObject *parent = nullptr) {
+        static SerialPortWorker serialPortWorker(portName, baudRate, parent);
+        return serialPortWorker;
+    }
+
+    bool openSerialPort();
+    void closeSerialPort();
+
+    bool isPortOpen() const { return m_serialPortOpened; }
+
+    void insertCommand(Command const &cmd);
+    bool getNextResult(Command &result, int timeout = 1000);
+
+    virtual void run() override;
+
+    void quit();
+
+private slots:
+    void getBytesAvailable();
+    bool getNumberOfBytesWritten(qint64);
+};
+
+#endif // SERIAL_PORT_WORKER_H_INCLUDED

include/shared_mem_buffer.h

@@ -6,7 +6,33 @@
 
 #include <QSharedMemory>
 
+// TODO: pid eintragen und convars/mutexe eintragen
+
+#ifdef __linux__
+
+
+#include <pthread.h>
+
+// PTHREAD_PROCESS_SHARED
+
+#else
+// WIN32
+#endif
+
 struct SharedMemBuffer {
+    int init;
+    char appName[32];
+    pid_t pid;
+    pthread_condattr_t sndCndA;
+    pthread_cond_t sndCndV;
+    pthread_mutexattr_t sndMtxA;
+    pthread_mutex_t sndMtx;
+
+    pthread_condattr_t rcvCndA;
+    pthread_cond_t rcvCndV;
+    pthread_mutexattr_t rcvMtxA;
+    pthread_mutex_t rcvMtx;
+
     struct rs {
         char comportName[16]; // z.B. "COM48"
         char baudStr[16];     // z.B. "19200"
@@ -18,104 +44,125 @@ struct SharedMemBuffer {
     char AutoEmissionOn;     // 1: zyklisch Anfragen zum Slave senden
 
     struct datif {
+#define DATIF_MAXCMDS 16
         uint16_t sendingPeriod;
         bool     sendingPer_changed;
+        uint8_t  OutCmdpara1;
+        uint8_t  OutCmdpara2;
+        uint8_t  OutCmdpara3;
+        uint8_t  OutCmdpara4;
+        uint16_t OutCmdpara5;
+        uint32_t OutCmdpara6;
+        uint8_t  dataStep;
+        uint8_t  scanStep;
+        uint8_t  RDBLKNR;
+        uint8_t  cycl_running;
     } datif;
 
-#if 0
-    // controlBus.cpp
-    char        txt4comStateLine[32];
-    char        txt4HsStateLine[32];
-    char        txt4masterStateLine[32];
-    char        txt4resultStateLine[32];
-    char        txt4dataLine[32];
-    char        txt4datifReceive[32];
-    char        txt4diagWindow[32];
-    char        sndTxt4diagWindow[32];
-    bool        Sdata_serialTestResult[32];
-    uint8_t     Sdata_pProtResultOk[32];
-    uint16_t    Sdata_receivedDataLength[32];
-    uint8_t     Sdata_receivedDataBlock[64];
+    struct txt4 {
+        char comStateLine[32];
+        char HsStateLine[32];
+        char masterStateLine[32];
+        char resultStateLine[32];
+        char dataLine[32];
+        char datifReceive[32];
+        char diagWindow[32];
+        char sndDiagWindow[32];
+    } txt4;
 
-    // datif.cpp
-    uint8_t     dif_dataStep;
-    uint8_t     dif_scanStep;
-    uint8_t     RDBLKNR;
-    uint8_t     datif_OutCmdpara1;
-    uint8_t     datif_OutCmdpara2;
-    uint8_t     datif_OutCmdpara3;
-    uint8_t     datif_OutCmdpara4;
-
-    uint16_t    datif_OutCmdpara5;
-    uint32_t    datif_OutCmdpara6;
-    uint8_t     cycl_running;
-
-    // dcBL.cpp
-    uint8_t     dcBL_LastBLcmd;   // stored the last sent cmd in order to analys response
-    uint8_t     dcBL_AtbBinFile[300000];
-    uint32_t    dcBL_fileSize;
-    uint16_t    dcBL_nrOfBlocks;
-    uint16_t    dcBL_fileCrc;
-    uint8_t     dcBL_myBuf[300000]; // same content like "dcBL_AtbBinFile" but bytewise
-
-    char        BlResp[50][32];
-    uint8_t     dcBL_step;
-    uint8_t     dcBL_state;
-    uint16_t    dcBL_BlkCtr;
-    uint16_t    dcBL_cyclCtr;
+    struct dcBL {
+#define SIZEBLRESP      50
+#define RAW_BL_DATALEN 150
+        uint8_t  LastBLcmd;   // stored the last sent cmd in order to analys response
+        uint8_t  AtbBinFile[300000];
+        uint32_t fileSize;
+        uint16_t nrOfBlocks;
+        uint16_t fileCrc;
+        uint8_t  myBuf[300000]; // same content like "dcBL_AtbBinFile" but bytewise
+        char     Resp[SIZEBLRESP][32];
+        int      pResp;
+        uint8_t  step;
+        uint8_t  state;
+        uint16_t BlkCtr;
+        uint16_t cyclCtr;
         uint16_t repeatCtr;
-    uint8_t     Sdata_rawData[150];
-    uint8_t     Sdata_LengthRawData;
+    } dcBL;
 
-    // hwapi.cpp
-    uint16_t    hwapi_shutterTime;
+    struct {
+        uint16_t shutterTime;
         char ticketTemplate[1024];
+    } hwapi;
 
-    // sendWRcmd.cpp
-    uint16_t    nextAsynchsendCmd0[16];
-    uint8_t     nrOfCmdsInQueue;
-    uint16_t    nextAsynchsendCmd4[8];
-    uint8_t     nextCmd4para1[8];
-    uint8_t     nextCmd4para2[8];
-    uint8_t     nextCmd4para3[8];
-    uint8_t     nextCmd4para4[8];
-    uint8_t     nrOfCmds4InQueue;
-    uint16_t    nextAsynchsendCmd8[4];
-    uint8_t     nextCmd8para1[4];
-    uint8_t     nextCmd8para2[4];
-    uint16_t    nextCmd8para3[4];
-    uint32_t    nextCmd8para4[4];
-    uint8_t     nrOfCmds8InQueue;
+    struct {
         uint8_t  sendAsynchDataBuf[160]; // no stack, only ONE buffer
         uint8_t  sendAsyDatLen;
-    uint8_t     Sdata_mdbSendBuffer[64];
-    uint8_t     Sdata_mdbSendLen;
-    uint8_t     prnDataParameters[4];
-    uint8_t     prnDataBufferUser;
-    char        Sdata_PRN_TEXT[20][64];
-    uint8_t     pPrnDataBuff;        // points to next PRINTER_BLOCK
-    uint8_t     nextFDwrCmd[16];
-    uint8_t     nextFDrdCmd[16];
-    uint8_t     nextFDblkNr[16];
+    } next;
 
-    uint8_t     nextFDpara1[16];
-    uint8_t     nextFDpara2[16];
-    uint8_t     nextFDpara3[16];
-    uint8_t     nextFDpara4[16];
-    uint8_t     p_nextFDcmdsInQueue;
-    uint8_t     longFDwrCmd[16];
-    uint8_t     longFDrdCmd[16];
-    uint8_t     longFDblkNr[16];
-    uint8_t     longFDlength[16];
+    struct { // highest priority
+#define CMDSTACKDEPTH  16
+        // up to 16 cmd can be stored. They are issued one by one every 100ms
+        uint16_t AsynchSend[CMDSTACKDEPTH];
+        uint8_t  para1[CMDSTACKDEPTH];  /* used to streamline source */
+        uint8_t  para2[CMDSTACKDEPTH];  /* used to streamline source */
+        uint8_t  para3[CMDSTACKDEPTH];  /* used to streamline source */
+        uint8_t  para4[CMDSTACKDEPTH];  /* used to streamline source */
+        uint8_t  nrOfCmdsInQueue;
+    } Cmd0;
 
-    uint8_t     longFDpara[16][64];
-    uint8_t     p_longFDcmdsInQueue;
+    struct { // lower priority
+             // Command Stack for commands with 4 parameters
+#define CMD4STACKDEPTH   8
+        uint16_t AsynchSend[CMD4STACKDEPTH];
+        uint8_t  para1[CMD4STACKDEPTH];
+        uint8_t  para2[CMD4STACKDEPTH];
+        uint8_t  para3[CMD4STACKDEPTH];
+        uint8_t  para4[CMD4STACKDEPTH];
+        uint8_t  nrOfCmdsInQueue;
+    } Cmd4;
 
-    // storeInData.cpp
-    bool        indat_savePrnPwr;
-    bool        indat_saveMifPwr;
-    bool        indat_MdbIsOn;
-#endif
+    struct {
+#define CMD8STACKDEPTH   4
+        uint16_t AsynchSend[CMD8STACKDEPTH];
+        uint8_t  para1[CMD8STACKDEPTH];
+        uint8_t  para2[CMD8STACKDEPTH];
+        uint16_t para3[CMD8STACKDEPTH];
+        uint32_t para4[CMD8STACKDEPTH];
+        uint8_t  nrOfCmdsInQueue;
+    } Cmd8;
+
+    struct { // short command, 4 data bytes
+#define FDCMD_STACKDEPTH 16
+        uint8_t  wrCmd[FDCMD_STACKDEPTH];
+        uint8_t  rdCmd[FDCMD_STACKDEPTH];
+        uint8_t  blkNr[FDCMD_STACKDEPTH];
+        uint8_t  para1[FDCMD_STACKDEPTH];
+        uint8_t  para2[FDCMD_STACKDEPTH];
+        uint8_t  para3[FDCMD_STACKDEPTH];
+        uint8_t  para4[FDCMD_STACKDEPTH];
+        uint8_t  cmdsInQueue;
+    } FDShort;
+
+    struct { // long command, 64 data bytes
+#define FDLONG_STACKDEPTH 16
+        uint8_t wrCmd[FDLONG_STACKDEPTH];
+        uint8_t rdCmd[FDLONG_STACKDEPTH];
+        uint8_t blkNr[FDLONG_STACKDEPTH];
+        uint8_t length[FDLONG_STACKDEPTH];
+        uint8_t para[FDLONG_STACKDEPTH][64];
+        uint8_t cmdsInQueue;
+    } FDLong;
+
+    struct {
+        uint8_t DataParameters[4];
+        uint8_t DataBufferUser;
+        uint8_t pDataBuff;        // points to next PRINTER_BLOCK
+    } prn;
+
+    struct {
+        bool savePrnPwr;
+        bool saveMifPwr;
+        bool MdbIsOn;
+    } indat;
 
     uint8_t ndbs;
     uint8_t pari;
@@ -170,10 +217,13 @@ struct SharedMemBuffer {
 #define NROFMIFSTATEBYTES       40
 #define PRN_STATE_ARRAY_SIZE    20
 #define PRN_STATE_FONT_SIZE     20
+#define MAXNROF_PRNBYTES   64
+#define MAXNROF_PRNBLOCKS  20
         uint8_t MIF_STATE[NROFMIFSTATEBYTES];
         uint8_t MIF_DATA[12][64];
         uint8_t PRN_STATE[PRN_STATE_ARRAY_SIZE];
         uint8_t PRN_FONTS[PRN_STATE_FONT_SIZE];
+        char PRN_TEXT[MAXNROF_PRNBLOCKS][MAXNROF_PRNBYTES];
         bool mdb_busRdy;
         bool mdb_V12on;
         bool mdb_V5on;
@@ -193,6 +243,10 @@ struct SharedMemBuffer {
         uint8_t pProtResultOk;
         uint16_t receivedDataLength;
         uint8_t receivedDataBlock[64];
+        uint8_t rawData[150];
+        uint8_t LengthRawData;
+        uint8_t mdbSendBuffer[64];
+        uint8_t mdbSendLen;
     } Sdata;
 
     uint8_t mif_cardType;

src/controlBus.cpp

@@ -97,65 +97,63 @@ bool gpi_PeriodicSendTimeHasChanged() {
 // ///////////////////////////////////////////////////////////////////////////////////
 
 // linke Spalte, über Connect Button
-static QString txt4comStateLine;
-
 QString epi_getTxt4comStateLine(void) {
     // GUI: get Text for serial Comport-State Line
-    return txt4comStateLine;
+    return SharedMemBuffer::getDataConst()->txt4.comStateLine;
 }
 
 void gpi_setTxt4comStateLine(QString txtline) {
     // serial: write Text to be displayed in serial Comport-State line (like "connected")
-    txt4comStateLine.clear();
-    if (txtline=="")
-        txt4comStateLine.clear();
-    else
-        txt4comStateLine=txtline;
+    memset(SharedMemBuffer::getData()->txt4.comStateLine,
+           0x00, sizeof(SharedMemBuffer::getData()->txt4.comStateLine));
+    memcpy(SharedMemBuffer::getData()->txt4.comStateLine,
+           txtline.toStdString().c_str(),
+           sizeof(SharedMemBuffer::getData()->txt4.comStateLine)-1);
 }
 
 void epi_clrTxt4comStateLine() {
-    txt4comStateLine.clear();
+    memset(SharedMemBuffer::getData()->txt4.comStateLine,
+           0x00, sizeof(SharedMemBuffer::getData()->txt4.comStateLine));
 }
 
 // rechte Spalte, oberste Statuszeile
 // I) "Handshakes" (serial Control)   flow.cpp
 // geht überhaupt was raus? kommt überhaupt was zurück?
-static QString txt4HsStateLine;
-
 QString epi_getTxt4HsStateLine(void) {
-    return txt4HsStateLine;
+    return SharedMemBuffer::getDataConst()->txt4.HsStateLine;
 }
 
 void gpi_setTxt4HsStateLine(QString txtline) {
-    txt4HsStateLine.clear();
-    if (txtline=="")
-        txt4HsStateLine.clear();
-    else
-        txt4HsStateLine=txtline;
+    // serial: write Text to be displayed in serial Comport-State line (like "connected")
+    memset(SharedMemBuffer::getData()->txt4.HsStateLine,
+           0x00, sizeof(SharedMemBuffer::getData()->txt4.HsStateLine));
+    memcpy(SharedMemBuffer::getData()->txt4.HsStateLine,
+           txtline.toStdString().c_str(),
+           sizeof(SharedMemBuffer::getData()->txt4.HsStateLine)-1);
 }
 
 void epi_clrTxt4HsStateLine() {
-    txt4HsStateLine.clear();
+    memset(SharedMemBuffer::getData()->txt4.HsStateLine,
+           0x00, sizeof(SharedMemBuffer::getData()->txt4.HsStateLine));
 }
 
 // II) Master receive state (empfangenes Telgramm OK? crc? length?  )
 // Statuszeile Auswertung der SlaveResponse (serial Frame, CRC usw)  (prot.cpp)
-static QString txt4masterStateLine;
-
 QString epi_getTxt4masterStateLine(void) {
-    return txt4masterStateLine;
+    return SharedMemBuffer::getDataConst()->txt4.masterStateLine;
 }
 
 void gpi_setTxt4masterStateLine(QString txtline) {
-    txt4masterStateLine.clear();
-    if (txtline=="")
-        txt4masterStateLine.clear();
-    else
-        txt4masterStateLine=txtline;
+    memset(SharedMemBuffer::getData()->txt4.masterStateLine,
+           0x00, sizeof(SharedMemBuffer::getData()->txt4.masterStateLine));
+    memcpy(SharedMemBuffer::getData()->txt4.masterStateLine,
+           txtline.toStdString().c_str(),
+           sizeof(SharedMemBuffer::getData()->txt4.masterStateLine)-1);
 }
 
 void epi_clrTxt4masterStateLine() {
-    txt4masterStateLine.clear();
+    memset(SharedMemBuffer::getData()->txt4.masterStateLine,
+           0x00, sizeof(SharedMemBuffer::getData()->txt4.masterStateLine));
 }
 
 //---------------------------------------------------------------------------------------------
@@ -164,110 +162,96 @@ void epi_clrTxt4masterStateLine() {
 // entweder Empfangsfehler anzeigen (crc? length?) oder result OUT-OK, OUT_ERR, IN_OK, IN_ERR
 // Hintergrund: wenn der Slave Fehler im Master-Telegramm gefunden hat, dann kann er es auch
 // nicht verwenden und nichts ausgeben oder einlesen
-
-static QString txt4resultStateLine;
-
 QString epi_getTxt4resultStateLine(void) {
-    return txt4resultStateLine;
+    return SharedMemBuffer::getDataConst()->txt4.resultStateLine;
 }
 
 void gpi_setTxt4resultStateLine(QString txtline) {
-    txt4resultStateLine.clear();
-    if (txtline=="")
-        txt4resultStateLine.clear();
-    else
-        txt4resultStateLine=txtline;
+    memset(SharedMemBuffer::getData()->txt4.resultStateLine,
+           0x00, sizeof(SharedMemBuffer::getData()->txt4.resultStateLine));
+    memcpy(SharedMemBuffer::getData()->txt4.resultStateLine,
+           txtline.toStdString().c_str(),
+           sizeof(SharedMemBuffer::getData()->txt4.resultStateLine)-1);
 }
 
 void epi_clrTxt4resultStateLine() {
-    txt4resultStateLine.clear();
+    memset(SharedMemBuffer::getData()->txt4.resultStateLine,
+           0x00, sizeof(SharedMemBuffer::getData()->txt4.resultStateLine));
 }
 
 //---------------------------------------------------------------------------------------------
-
 // IV  Statuszeile Empfangsdaten
-static QString txt4dataLine;
-
 QString epi_getTxt4dataStateLine(void) {
     // GUI: get Text for serial Comport-State Line
-    return txt4dataLine;
-
+    return SharedMemBuffer::getDataConst()->txt4.dataLine;
 }
 
 void gpi_setTxt4dataStateLine(QString txtline) {
     // serial: write Text to be displayed in serial Comport-State line (like "connected")
-    txt4dataLine.clear();
-    if (txtline=="")
-        txt4dataLine.clear();
-    else
-        txt4dataLine=txtline;
+    memset(SharedMemBuffer::getData()->txt4.dataLine,
+           0x00, sizeof(SharedMemBuffer::getData()->txt4.dataLine));
+    memcpy(SharedMemBuffer::getData()->txt4.dataLine,
+           txtline.toStdString().c_str(),
+           sizeof(SharedMemBuffer::getData()->txt4.dataLine)-1);
 }
 
 void epi_clrTxt4dataStateLine() {
-    txt4dataLine.clear();
+    memset(SharedMemBuffer::getData()->txt4.dataLine,
+           0x00, sizeof(SharedMemBuffer::getData()->txt4.dataLine));
 }
 
 //---------------------------------------------------------------------------------------------
 
 // 5. Zeile: Datif Ergebnis, Daten brauchbar?
-
-static QString txt4datifReceive;
-
 QString epi_getTxt4datifLine(void) {
-    return txt4datifReceive;
+    return SharedMemBuffer::getDataConst()->txt4.datifReceive;
 }
 
 void gpi_setTxt4datifLine(QString txtline) {
-    txt4datifReceive.clear();
-    if (txtline=="")
-        txt4datifReceive.clear();
-    else
-        txt4datifReceive=txtline;
+    memset(SharedMemBuffer::getData()->txt4.datifReceive,
+           0x00, sizeof(SharedMemBuffer::getData()->txt4.datifReceive));
+    memcpy(SharedMemBuffer::getData()->txt4.datifReceive,
+           txtline.toStdString().c_str(),
+           sizeof(SharedMemBuffer::getData()->txt4.datifReceive)-1);
 }
 
 void epi_clrTxt4datifLine() {
-    txt4datifReceive.clear();
+    memset(SharedMemBuffer::getData()->txt4.datifReceive,
+           0x00, sizeof(SharedMemBuffer::getData()->txt4.datifReceive));
 }
 
-//---------------------------------------------------------------------------------------------
-//---------------------------------------------------------------------------------------------
-
-static QString txt4diagWindow;
-
 QString epi_getTxt4RsDiagWin(void) {
-    return txt4diagWindow;
+    return SharedMemBuffer::getDataConst()->txt4.diagWindow;
 }
 
 void gpi_setTxt4RsDiagWin(QString txtline) {
-    txt4diagWindow.clear();
-    if (txtline=="")
-        txt4diagWindow.clear();
-    else
-        txt4diagWindow=txtline;
+    memset(SharedMemBuffer::getData()->txt4.diagWindow,
+           0x00, sizeof(SharedMemBuffer::getData()->txt4.diagWindow));
+    memcpy(SharedMemBuffer::getData()->txt4.diagWindow,
+           txtline.toStdString().c_str(),
+           sizeof(SharedMemBuffer::getData()->txt4.diagWindow)-1);
 }
 
 void epi_clrTxt4RsDiagWin() {
-    txt4diagWindow.clear();
+    memset(SharedMemBuffer::getData()->txt4.diagWindow,
+           0x00, sizeof(SharedMemBuffer::getData()->txt4.diagWindow));
 }
 
-//---------------------------------------------------------------------------------------------
-
-static QString sndTxt4diagWindow;
-
 QString epi_get2ndTxt4RsDiagWin(void) {
-    return sndTxt4diagWindow;
+    return SharedMemBuffer::getDataConst()->txt4.sndDiagWindow;
 }
 
 void gpi_set2ndTxt4RsDiagWin(QString txtline) {
-    sndTxt4diagWindow.clear();
-    if (txtline=="")
-        sndTxt4diagWindow.clear();
-    else
-        sndTxt4diagWindow=txtline;
+    memset(SharedMemBuffer::getData()->txt4.sndDiagWindow,
+           0x00, sizeof(SharedMemBuffer::getData()->txt4.sndDiagWindow));
+    memcpy(SharedMemBuffer::getData()->txt4.sndDiagWindow,
+           txtline.toStdString().c_str(),
+           sizeof(SharedMemBuffer::getData()->txt4.sndDiagWindow)-1);
 }
 
 void epi_clr2ndTxt4RsDiagWin() {
-    sndTxt4diagWindow.clear();
+    memset(SharedMemBuffer::getData()->txt4.sndDiagWindow,
+           0x00, sizeof(SharedMemBuffer::getData()->txt4.sndDiagWindow));
 }
 
 // ///////////////////////////////////////////////////////////////////////////////////

src/hwapi.cpp

@@ -1772,8 +1772,7 @@ void hwapi::readback_machineIDdata(uint8_t *length, uint8_t *data) const
 static uint16_t hwapi_shutterTime;
 
 // locks, 2.Level: (Motor stops automatical on end switch or by 5s timeout)
-uint8_t hwapi::lock_openUpperDoor(void) const
-{
+uint8_t hwapi::lock_openUpperDoor(void) const {
     //bool sendWRcmd_setSendCommand4(uint16_t nextCmd, uint8_t dat1, uint8_t dat2, uint8_t dat3, uint8_t dat4);
         // commands are defined in PIdefines.h
     sendWRcmd_setSendCommand4(SENDDIRCMD_OPENUP_DOOR, 1, 0, 0, 0);
@@ -1801,54 +1800,39 @@ uint8_t hwapi::lock_closeLowerDoor(void) const
     return 0;
 }
 
-void hwapi::shut_openOnce(void) const
-{
+void hwapi::shut_openOnce(void) const {
     // and close automatic after shutter time
-    uint16_t zeit=hwapi_shutterTime;
-    zeit/=100;
+    uint16_t zeit = (SharedMemBuffer::getDataConst()->hwapi.shutterTime) / 100;
     sendWRcmd_setSendCommand4(SENDDIRCMD_SHUTOPENBYTIME, uint8_t(zeit) ,0,0,0);
 
 }
 
-void hwapi::shut_openForCoin(bool start) const
-{
+void hwapi::shut_openForCoin(bool start) const {
     // start=true: start opening flap if coin is attached
     // start=false: stop process
-
-    uint16_t zeit=hwapi_shutterTime;
-    zeit/=100;
+    uint16_t zeit = (SharedMemBuffer::getDataConst()->hwapi.shutterTime) / 100;
     sendWRcmd_setSendCommand4(SENDDIRCMD_SHUTOPENBYCOIN, uint8_t(start), uint8_t(zeit),0,0);
 
 }
 
-void hwapi::shut_sendOpeningTime(uint16_t timeIn_ms ) const
-{
+void hwapi::shut_sendOpeningTime(uint16_t timeIn_ms ) const {
     // after this time without retrigger the flap is closed
     //sendWRcmd_setSendCommand4(SENDDIRCMD_SHUT_SENDTIME, timeIn100ms,0,0,0);
-    hwapi_shutterTime=timeIn_ms;
-
+    SharedMemBuffer::getData()->hwapi.shutterTime = timeIn_ms;
 }
 
 
-void hwapi::esc_takeMoney(void) const
-{
+void hwapi::esc_takeMoney(void) const {
     // and close automatically after escrow time (1s)
     sendWRcmd_setSendCommand0(SENDDIRCMD_ESCRO_TAKE);
 }
 
-void hwapi::esc_returnMoney(void) const
-{
+void hwapi::esc_returnMoney(void) const {
     // and close automatically after time
     sendWRcmd_setSendCommand0(SENDDIRCMD_ESCRO_GIVE);
 
 }
 
-
-
-
-
-
-
 // ----------------------------------------------------------------------------------------------------------
 // --------------------------------------------- MIFARE -----------------------------------------------------
 // ----------------------------------------------------------------------------------------------------------

src/main.cpp

@@ -0,0 +1,9 @@
+#include <QCoreApplication>
+#include "tslib.h"
+
+int main(int argc, char *argv[])
+{
+    QCoreApplication a(argc, argv);
+
+    return a.exec();
+}

src/sendWRcmd.cpp

@@ -1,283 +1,157 @@
-#include <stdint.h>
+#include <cstdint>
+#include <algorithm>
+
 #include <QString>
 #include <QDebug>
+
 #include "tslib.h"
 #include "sendWRcmd.h"
-
+#include "shared_mem_buffer.h"
 
 void indat_PrnPwr(void);
 
+/* convention: use simple (not rotating) FIFO Stack:
+Example: nrOfCmdsInQueue=4 then
+    nextAsynchsendCmd0[0]=cmd1      // was stored as first
+    nextAsynchsendCmd0[1]=cmd2
+    nextAsynchsendCmd0[2]=cmd3
+    nextAsynchsendCmd0[3]=cmd4      // came in as last
 
-void sendWRcmd_INI(void)
-{
+    Send: [0] first, then move buffer 1 down:
+    nextAsynchsendCmd0[0]=cmd2
+    nextAsynchsendCmd0[1]=cmd3
+    nextAsynchsendCmd0[2]=cmd4
+    nextAsynchsendCmd0[3]=0;
+    nrOfCmdsInQueue=3 now
+*/
+template <typename T, std::size_t N>
+static void *move_buffer_down_by_one(T (&buffer)[N]) {
+    return memmove(buffer, &buffer[1], sizeof(buffer)-sizeof(buffer[0]));
+}
+template <typename T, std::size_t N>
+static void clear(T (&buffer)[N]) {
+    memset((char *)(&buffer[0]), 0x00, sizeof(buffer));
+}
+template <typename T, std::size_t M, std::size_t N>
+static void clear(T (&buffer)[M][N]) {
+    memset((char *)(&buffer[0][0]), 0x00, sizeof(buffer));
+}
+template <typename T>
+static void sendWRcmd_clearCmdStack(T &cmdStack) {
+    clear(cmdStack.AsynchSend);
+    clear(cmdStack.para1);
+    clear(cmdStack.para2);
+    clear(cmdStack.para3);
+    clear(cmdStack.para4);
+    cmdStack.nrOfCmdsInQueue = 0;
+}
+template <typename T, typename T1, typename T2, typename T3, typename T4>
+static bool sendWRcmd_setSendCmd(T &cmdStack, uint16_t nextCmd, T1 dat1,
+                                 T2 dat2, T3 dat3, T4 dat4) {
+    uint8_t const &n = cmdStack.nrOfCmdsInQueue;
+    int const STACKDEPTH = sizeof(cmdStack.para1);
+    if (n < STACKDEPTH) {
+        cmdStack.AsynchSend[n] = nextCmd;
+        cmdStack.para1[n] = dat1;
+        cmdStack.para2[n] = dat2;
+        cmdStack.para3[n] = dat3;
+        cmdStack.para4[n] = dat4;
+        cmdStack.nrOfCmdsInQueue += 1;
+        return true;                // ok, will be sent
+    }
+    qCritical() << "cannot save cmd because stack is full";
+    return false;           // not possible
+}
+template <typename T, typename T1, typename T2, typename T3, typename T4>
+static bool sendWRcmd_getSendCmd(T &cmdStack, T1 *dat1, T2 *dat2,
+                                 T3 *dat3, T4 *dat4) {
+    if (dat1 && dat2 && dat3 && dat4) {
+        uint8_t const &n = cmdStack.nrOfCmdsInQueue;
+        int const STACKDEPTH = sizeof(cmdStack.para1);
+        if ((n > 0) && (n <= STACKDEPTH)) {
+            uint16_t const nxt = cmdStack.AsynchSend[0];
+            move_buffer_down_by_one(cmdStack.AsynchSend);
+            *dat1 = cmdStack.para1[n];
+            *dat2 = cmdStack.para2[n];
+            *dat3 = cmdStack.para3[n];
+            *dat4 = cmdStack.para4[n];
+            cmdStack.nrOfCmdsInQueue = n - 1;
+            return nxt;
+        }
+    }
+    qCritical() << "cannot fetch cmd";
+    return 0;   // error
+}
 
+void sendWRcmd_INI(void) {
     sendWRcmd_clrCmdStack();
     sendWRcmd_clrCmd4Stack();
     sendFDcmd_clrStack();
     longFDcmd_clrStack();
 }
 
-// Command Stack for commands without parameters
-
-
-static uint16_t nextAsynchsendCmd0[CMDSTACKDEPTH];
-static uint8_t  nrOfCmdsInQueue;
-/* convention: use simple (not rotating) FIFO Stack:
-Example: nrOfCmdsInQueue=4 then
-    nextAsynchsendCmd0[0]=cmd1      // was stored as first
-    nextAsynchsendCmd0[1]=cmd2
-    nextAsynchsendCmd0[2]=cmd3
-    nextAsynchsendCmd0[3]=cmd4      // came in as last
-
-    Send: [0] first, then move buffer 1 down:
-    nextAsynchsendCmd0[0]=cmd2
-    nextAsynchsendCmd0[1]=cmd3
-    nextAsynchsendCmd0[2]=cmd4
-    nextAsynchsendCmd0[3]=0;
-    nrOfCmdsInQueue=3 now
-*/
-
-void sendWRcmd_clrCmdStack(void)
-{
-    uint8_t nn;
-    for (nn=0; nn<CMDSTACKDEPTH; nn++)
-        nextAsynchsendCmd0[nn]=0;
-    nrOfCmdsInQueue=0;
+void sendWRcmd_clrCmdStack(void) {
+    sendWRcmd_clearCmdStack(SharedMemBuffer::getData()->Cmd0);
+}
+void sendWRcmd_clrCmd4Stack(void) {
+    sendWRcmd_clearCmdStack(SharedMemBuffer::getData()->Cmd4);
+}
+void sendWRcmd_clrCmd8Stack(void) {
+    sendWRcmd_clearCmdStack(SharedMemBuffer::getData()->Cmd8);
 }
 
-bool sendWRcmd_setSendCommand0(uint16_t nextCmd)
-{
+bool sendWRcmd_setSendCommand0(uint16_t nextCmd, uint8_t dat1, uint8_t dat2,
+                               uint8_t dat3, uint8_t dat4) {
     // write Command to memory, wait for transport
-    if (nrOfCmdsInQueue>=CMDSTACKDEPTH)
-    {
-        qDebug() << "cannot save cmd because stack is full";
-        return false;           // not possible
+    return sendWRcmd_setSendCmd(SharedMemBuffer::getData()->Cmd0,
+                                nextCmd, dat1, dat2, dat3, dat4);
 }
-    nextAsynchsendCmd0[nrOfCmdsInQueue++]=nextCmd;
-    //qDebug() << "PI cmd queued:"<< nextCmd << ", saved, pp=" << nrOfCmdsInQueue;
-    return true;                // ok, will be sent
-}
-
-uint16_t sendWRcmd_getSendCommand0(void)
-{
-    uint16_t nxtAsynchCmd;
-    uint8_t nn, ll;
-    if (nrOfCmdsInQueue==0 || nrOfCmdsInQueue>CMDSTACKDEPTH)
-        return 0;   // error
-    nxtAsynchCmd=nextAsynchsendCmd0[0];
-
-    // move Puffer down by one element
-    if (CMDSTACKDEPTH>0)
-        ll=CMDSTACKDEPTH-1;
-    else
-        ll=0;
-    for (nn=0; nn<ll; nn++)
-        nextAsynchsendCmd0[nn]=nextAsynchsendCmd0[nn+1];
-
-    if (nrOfCmdsInQueue>0)
-        nrOfCmdsInQueue--;
-    //qDebug() << "PI cmd queued:"<< nxtAsynchCmd << ", restored, pp now =" << nrOfCmdsInQueue;
-    return nxtAsynchCmd;
-}
-
-//---------------------------------------------------------------------------------------------------------------------
-//---------------------------------------------------------------------------------------------------------------------
-// Command Stack for commands with 4 parameters
-
-
-
-static uint16_t nextAsynchsendCmd4[CMD4STACKDEPTH];
-static uint8_t  nextCmd4para1[CMD4STACKDEPTH];
-static uint8_t  nextCmd4para2[CMD4STACKDEPTH];
-static uint8_t  nextCmd4para3[CMD4STACKDEPTH];
-static uint8_t  nextCmd4para4[CMD4STACKDEPTH];
-static uint8_t  nrOfCmds4InQueue;
-/* convention: use simple (not rotating) FIFO Stack:
-Example: nrOfCmdsInQueue=4 then
-    nextAsynchsendCmd0[0]=cmd1      // was stored as first
-    nextAsynchsendCmd0[1]=cmd2
-    nextAsynchsendCmd0[2]=cmd3
-    nextAsynchsendCmd0[3]=cmd4      // came in as last
-
-    Send: [0] first, then move buffer 1 down:
-    nextAsynchsendCmd0[0]=cmd2
-    nextAsynchsendCmd0[1]=cmd3
-    nextAsynchsendCmd0[2]=cmd4
-    nextAsynchsendCmd0[3]=0;
-    nrOfCmdsInQueue=3 now
-*/
-
-
-void sendWRcmd_clrCmd4Stack(void)
-{
-    uint8_t nn;
-    for (nn=0; nn<CMD4STACKDEPTH; nn++)
-    {
-        nextAsynchsendCmd4[nn]=0;
-        nextCmd4para1[nn]=0;
-        nextCmd4para2[nn]=0;
-        nextCmd4para3[nn]=0;
-        nextCmd4para4[nn]=0;
-    }
-    nrOfCmds4InQueue=0;
-}
-
-bool sendWRcmd_setSendCommand4(uint16_t nextCmd, uint8_t dat1, uint8_t dat2, uint8_t dat3, uint8_t dat4)
-{
+bool sendWRcmd_setSendCommand4(uint16_t nextCmd,
+                               uint8_t dat1, uint8_t dat2,
+                               uint8_t dat3, uint8_t dat4) {
     // write Command to memory, wait for transport
-    if (nrOfCmds4InQueue>=CMD4STACKDEPTH)
-    {
-        qDebug() << "cannot save cmd because stack is full";
-        return false;           // not possible
+    return sendWRcmd_setSendCmd(SharedMemBuffer::getData()->Cmd4, nextCmd, dat1,
+                                dat2, dat3, dat4);
 }
-    nextAsynchsendCmd4[nrOfCmds4InQueue]=nextCmd;
-    nextCmd4para1[nrOfCmds4InQueue]=dat1;
-    nextCmd4para2[nrOfCmds4InQueue]=dat2;
-    nextCmd4para3[nrOfCmds4InQueue]=dat3;
-    nextCmd4para4[nrOfCmds4InQueue]=dat4;
-    //qDebug() << "data with 4 data byte saved, pp=" << nrOfCmds4InQueue;
-    //qDebug() << " dat1=" << nextCmd4para1[nrOfCmds4InQueue] << " dat2=" << nextCmd4para2[nrOfCmds4InQueue]
-    //             << " dat3=" << nextCmd4para3[nrOfCmds4InQueue]  << " dat4=" << nextCmd4para4[nrOfCmds4InQueue];
-    nrOfCmds4InQueue++;
-    return true;                // ok, will be sent
-}
-
-uint16_t sendWRcmd_getSendCommand4(uint8_t *dat1, uint8_t *dat2, uint8_t *dat3, uint8_t *dat4)
-{
-    uint16_t nxtAsynchCmd;
-    uint8_t nn, ll;
-
-    if (nrOfCmds4InQueue==0 || nrOfCmds4InQueue>CMD4STACKDEPTH)
-        return 0;   // error
-    nxtAsynchCmd=nextAsynchsendCmd4[0];
-    *dat1=nextCmd4para1[0];
-    *dat2=nextCmd4para2[0];
-    *dat3=nextCmd4para3[0];
-    *dat4=nextCmd4para4[0];
-    //qDebug() << "cmd4  restored to send from [0];  pp=" << nrOfCmds4InQueue;
-    //qDebug() << " data1: " << nextCmd4para1[0] << " data2: " << nextCmd4para2[0] <<
-    //            " data3: " << nextCmd4para3[0] << " data4: " << nextCmd4para4[0];
-
-    // move Puffer down by one element
-        if (CMD4STACKDEPTH>0)
-        ll=CMD4STACKDEPTH-1;
-    else
-        ll=0;
-    for (nn=0; nn<ll; nn++)
-    {
-        nextAsynchsendCmd4[nn]=nextAsynchsendCmd4[nn+1];
-        nextCmd4para1[nn]=nextCmd4para1[nn+1];
-        nextCmd4para2[nn]=nextCmd4para2[nn+1];
-        nextCmd4para3[nn]=nextCmd4para3[nn+1];
-        nextCmd4para4[nn]=nextCmd4para4[nn+1];
-    }
-    if (nrOfCmds4InQueue>0)
-        nrOfCmds4InQueue--;
-    //qDebug() << "cmd4  after push down: pp=" << nrOfCmds4InQueue;
-    return nxtAsynchCmd;
-}
-
-
-
-
-
-static uint16_t  nextAsynchsendCmd8[CMD8STACKDEPTH];
-static uint8_t   nextCmd8para1[CMD8STACKDEPTH];
-static uint8_t   nextCmd8para2[CMD8STACKDEPTH];
-static uint16_t  nextCmd8para3[CMD8STACKDEPTH];
-static uint32_t  nextCmd8para4[CMD8STACKDEPTH];
-static uint8_t   nrOfCmds8InQueue;
-
-void sendWRcmd_clrCmd8Stack(void)
-{
-    uint8_t nn;
-    for (nn=0; nn<CMD8STACKDEPTH; nn++)
-    {
-        nextAsynchsendCmd8[nn]=0;
-        nextCmd8para1[nn]=0;
-        nextCmd8para2[nn]=0;
-        nextCmd8para3[nn]=0;
-        nextCmd8para4[nn]=0;
-    }
-    nrOfCmds8InQueue=0;
-}
-
-bool sendWRcmd_setSendCommand8(uint16_t nextCmd, uint8_t dat1, uint8_t dat2, uint16_t dat3, uint32_t dat4)
-{
+bool sendWRcmd_setSendCommand8(uint16_t nextCmd,
+                               uint8_t dat1, uint8_t dat2,
+                               uint16_t dat3, uint32_t dat4) {
     // write Command to memory, wait for transport
-    if (nrOfCmds8InQueue>=CMD8STACKDEPTH)
-    {
-        qDebug() << "cannot save cmd because stack is full";
-        return false;           // not possible
+    return sendWRcmd_setSendCmd(SharedMemBuffer::getData()->Cmd8, nextCmd, dat1,
+                                dat2, dat3, dat4);
 }
-    nextAsynchsendCmd8[nrOfCmds8InQueue]=nextCmd;
-    nextCmd8para1[nrOfCmds8InQueue]=dat1;
-    nextCmd8para2[nrOfCmds8InQueue]=dat2;
-    nextCmd8para3[nrOfCmds8InQueue]=dat3;
-    nextCmd8para4[nrOfCmds8InQueue]=dat4;
-    nrOfCmds8InQueue++;
+
+uint16_t sendWRcmd_getSendCommand0(uint8_t *dat1, uint8_t *dat2,
+                                   uint8_t *dat3, uint8_t *dat4) {
+    return sendWRcmd_getSendCmd(SharedMemBuffer::getData()->Cmd0, dat1, dat2,
+                                dat3, dat4);
+}
+uint16_t sendWRcmd_getSendCommand4(uint8_t *dat1, uint8_t *dat2,
+                                   uint8_t *dat3, uint8_t *dat4) {
+    return sendWRcmd_getSendCmd(SharedMemBuffer::getData()->Cmd4, dat1, dat2,
+                                dat3, dat4);
+}
+uint16_t sendWRcmd_getSendCommand8(uint8_t *dat1, uint8_t *dat2,
+                                   uint16_t *dat3, uint32_t *dat4) {
+    return sendWRcmd_getSendCmd(SharedMemBuffer::getData()->Cmd8, dat1, dat2,
+                                dat3, dat4);
+}
+
+bool sendWRcmd_setSendBlock160(uint8_t leng, uint8_t const *buf) {
+    SharedMemBuffer::getData()->next.sendAsyDatLen = std::min(leng, (uint8_t)160);
+    clear(SharedMemBuffer::getData()->next.sendAsynchDataBuf);
+    memcpy((char *)(&SharedMemBuffer::getData()->next.sendAsynchDataBuf),
+           (char const *)(buf),
+           SharedMemBuffer::getDataConst()->next.sendAsyDatLen);
     return true;                // ok, will be sent
 }
-
-uint16_t sendWRcmd_getSendCommand8(uint8_t *dat1, uint8_t *dat2, uint16_t *dat3, uint32_t *dat4)
-{
-    uint16_t nxtAsynchCmd;
-    uint8_t nn, ll;
-
-    if (nrOfCmds8InQueue==0 || nrOfCmds8InQueue>CMD8STACKDEPTH)
-        return 0;   // error
-    nxtAsynchCmd=nextAsynchsendCmd8[0];
-    *dat1=nextCmd8para1[0];
-    *dat2=nextCmd8para2[0];
-    *dat3=nextCmd8para3[0];
-    *dat4=nextCmd8para4[0];
-
-    // move buffer down by one element
-    if (CMD8STACKDEPTH>0)
-        ll=CMD8STACKDEPTH-1;
-    else
-        ll=0;
-    for (nn=0; nn<ll; nn++)
-    {
-        nextAsynchsendCmd8[nn]=nextAsynchsendCmd8[nn+1];
-        nextCmd8para1[nn]=nextCmd8para1[nn+1];
-        nextCmd8para2[nn]=nextCmd8para2[nn+1];
-        nextCmd8para3[nn]=nextCmd8para3[nn+1];
-        nextCmd8para4[nn]=nextCmd8para4[nn+1];
-    }
-    if (nrOfCmds8InQueue>0)
-        nrOfCmds8InQueue--;
-    return nxtAsynchCmd;
-}
-
-
-
-
-
-
-
-static uint8_t sendAsynchDataBuf[160]; // no stack, only ONE buffer
-static uint8_t sendAsyDatLen;
-
-bool sendWRcmd_setSendBlock160(uint8_t leng, uint8_t *buf)
-{
-    //qDebug()  << "pi epi: storing send data";
-    if (leng>160) leng=160;
-    sendAsyDatLen=leng;
-    tslib_strclr(sendAsynchDataBuf, 0, 160);
-    for (uint8_t nn=0; nn<leng; nn++)
-        sendAsynchDataBuf[nn]=buf[nn];
-    return true;                // ok, will be sent
-}
-
-uint8_t sendWRcmd_getSendBlock160(uint8_t *leng, uint8_t *buf)
-{
+uint8_t sendWRcmd_getSendBlock160(uint8_t *leng, uint8_t *buf) {
     //qDebug()  << "pi gpi: restoring send data";
-    *leng=sendAsyDatLen;
-    for (uint8_t nn=0; nn<sendAsyDatLen; nn++)
-        buf[nn]=sendAsynchDataBuf[nn];
-    sendAsyDatLen=0;
-    //tslib_strclr(sendAsynchDataBuf, 0, 64);
+    *leng = SharedMemBuffer::getDataConst()->next.sendAsyDatLen;
+    memcpy((char *)buf,
+           (char const *)(SharedMemBuffer::getData()->next.sendAsynchDataBuf),
+           *leng);
+    SharedMemBuffer::getData()->next.sendAsyDatLen = 0;
     return *leng;
 }
 
@@ -290,184 +164,141 @@ uint8_t sendWRcmd_getSendBlock160(uint8_t *leng, uint8_t *buf)
 // start with: SENDDIRCMD_EXCHGMDB,
     // send crude data from here to DC, DC to mdb slaves, mdb answer, return here within 50ms
 
-
-static uint8_t Sdata_mdbSendBuffer[64];
-static uint8_t Sdata_mdbSendLen;
-
-uint8_t epi_store64ByteSendData(uint8_t length, uint8_t *buf)
-{
+uint8_t epi_store64ByteSendData(uint8_t length, uint8_t const *buf) {
     // HWapi writes data to be forwarded to DC and further to mdb-device
-    for (uint8_t nn=0; nn<length; nn++)
-        Sdata_mdbSendBuffer[nn]=buf[nn];
-    Sdata_mdbSendLen=length;
+    memcpy((char *)(&SharedMemBuffer::getData()->Sdata.mdbSendBuffer[0]),
+           (char const *)buf, length);
+    SharedMemBuffer::getData()->Sdata.mdbSendLen = length;
     return 0;
 }
 
-uint8_t gpi_restore64ByteSendData(uint8_t *length, uint8_t *buf)
-{
+uint8_t gpi_restore64ByteSendData(uint8_t *length, uint8_t *buf) {
     // datif reads data to forward to dc
-    for (uint8_t nn=0; nn<Sdata_mdbSendLen; nn++)
-        buf[nn]=Sdata_mdbSendBuffer[nn];
-    *length=Sdata_mdbSendLen;
-    Sdata_mdbSendLen=0;
+    memcpy((char *)(buf),
+           (char const *)(&SharedMemBuffer::getDataConst()->Sdata.mdbSendBuffer[0]),
+            SharedMemBuffer::getDataConst()->Sdata.mdbSendLen);
+    *length = SharedMemBuffer::getDataConst()->Sdata.mdbSendLen;
+    SharedMemBuffer::getData()->Sdata.mdbSendLen = 0;
     return 0;
 }
 
-
-
-
-
-
 //------------------------------------------------------------------------------------
 //------------------------------------------------------------------------------------
 //---------------------------------------- Printer Text Fifo -------------------------
-static uint8_t prnDataParameters[4];
-static uint8_t prnDataBufferUser;
-
-void epi_storeUserOfSendingTextBuffer(uint8_t user, uint8_t para1, uint8_t para2, uint8_t para3, uint8_t para4 )
-{
+void epi_storeUserOfSendingTextBuffer(uint8_t user, uint8_t para1,
+                                      uint8_t para2, uint8_t para3,
+                                      uint8_t para4 ) {
     // user=1: Text-Print is using this buffer
     //      2: QR-code-Printer is using this buffer
-    prnDataBufferUser=user;
-    prnDataParameters[0]=para1;
-    prnDataParameters[1]=para2;
-    prnDataParameters[2]=para3;
-    prnDataParameters[3]=para4;
-
-//    qDebug() << "new user stored: " << user;
-
+    SharedMemBuffer::getData()->prn.DataBufferUser = user;
+    SharedMemBuffer::getData()->prn.DataParameters[0] = para1;
+    SharedMemBuffer::getData()->prn.DataParameters[1] = para2;
+    SharedMemBuffer::getData()->prn.DataParameters[2] = para3;
+    SharedMemBuffer::getData()->prn.DataParameters[3] = para4;
 }
 
-uint8_t gpi_getUserOfSendingTextBuffer(uint8_t *para1, uint8_t *para2, uint8_t *para3, uint8_t *para4)
-{
+uint8_t gpi_getUserOfSendingTextBuffer(uint8_t *para1, uint8_t *para2,
+                                       uint8_t *para3, uint8_t *para4) {
     // user=1: Text-Print is using this buffer
     //      2: QR-code-Printer is using this buffer
     //qDebug() << "returning user "<< prnDataBufferUser;
-
-    *para1=prnDataParameters[0];
-    *para2=prnDataParameters[1];
-    *para3=prnDataParameters[2];
-    *para4=prnDataParameters[3];
-    return prnDataBufferUser;
-
+    *para1 = SharedMemBuffer::getDataConst()->prn.DataParameters[0];
+    *para2 = SharedMemBuffer::getDataConst()->prn.DataParameters[1];
+    *para3 = SharedMemBuffer::getDataConst()->prn.DataParameters[2];
+    *para4 = SharedMemBuffer::getDataConst()->prn.DataParameters[3];
+    return SharedMemBuffer::getDataConst()->prn.DataBufferUser;
 }
 
-
 // Sending Text Fifo
 // ONE printer doc consists of 20 x 64 byte
 // #define MAXNROF_PRNBYTES   64
 // #define MAXNROF_PRNBLOCKS  20
-static char Sdata_PRN_TEXT[MAXNROF_PRNBLOCKS][MAXNROF_PRNBYTES];
-static uint8_t pPrnDataBuff;        // points to next PRINTER_BLOCK
-
+// static char Sdata_PRN_TEXT[MAXNROF_PRNBLOCKS][MAXNROF_PRNBYTES];
+// static uint8_t pPrnDataBuff;        // points to next PRINTER_BLOCK
 
 //static uint8_t pPrnDataBuff;        // points to next waiting printer text
 //  defined above, needed if more then one text is stored (before sent)
 // every block will be sent after 100ms, if 8 blocks are stored within this 100ms
 // then pointer goes up to 8. Important: FIFO!!!!!!!!
 
-void epi_resetPrinterStack(void)
-{
-    pPrnDataBuff=0;
+void epi_resetPrinterStack(void) {
+    SharedMemBuffer::getData()->prn.pDataBuff = 0;
 }
 
-uint8_t epi_storePrnText(char *buf, uint8_t leng)
-{
+uint8_t epi_storePrnText(char *buf, uint8_t leng) {
     // store text from Gui in next higher free memory 0....9
 
-    uint16_t len;
-    uint8_t  pp, nn;
+    uint16_t const len = std::min(leng, (uint8_t)MAXNROF_PRNBYTES);
+    int const pp = SharedMemBuffer::getDataConst()->prn.pDataBuff;
 
-    pp=pPrnDataBuff;    // next free memory block with 64byte each
-    if (pp>=MAXNROF_PRNBLOCKS)
-        return 1;   // not possible, no free mem
-
-    //len=tslib_strlen(buf);    // kennt keine Binärzeichen!!!!!!
-    len=leng;
-    if (len>MAXNROF_PRNBYTES)
-        len=MAXNROF_PRNBYTES;
-
-    tslib_strclr(Sdata_PRN_TEXT[pp], 0, MAXNROF_PRNBYTES);
-
-    for (nn=0; nn<len; nn++)
-        Sdata_PRN_TEXT[pp][nn]=buf[nn];     // copy new text into buffer
-
-    if (pPrnDataBuff<MAXNROF_PRNBLOCKS)
-        pPrnDataBuff++;                     // inc pointer if end not yet reached
+    // next free memory block with 64byte each
+    if (pp < MAXNROF_PRNBLOCKS) {
+        clear(SharedMemBuffer::getData()->Sdata.PRN_TEXT[pp]);
+        // copy new text into buffer
+        memcpy((char *)(&SharedMemBuffer::getData()->Sdata.PRN_TEXT[pp][0]),
+               (char const *)(buf), len);
+        // inc pointer if end not yet reached
+        SharedMemBuffer::getData()->prn.pDataBuff++;
         return 0;       // OK
     }
 
+    return 1;   // not possible, no free mem
+}
 
-
-uint8_t gpi_restorePrnText(uint8_t *retbuf)
-{
+uint8_t gpi_restorePrnText(uint8_t *retbuf) {
     // read printer text and send to slave, size of retbuf == 64
 
     // always read from [0] because this is the oldest (Fifo)
     // then move all text lines down by one and dec pointer
+    int pp = SharedMemBuffer::getDataConst()->prn.pDataBuff;
 
-    uint8_t  nn, pp=pPrnDataBuff;
-
-    if (pp==0)    // next free memory block with 64byte each
-        return 1;           // no text in buffer
-
+    if (pp > 0) { // next free memory block with 64byte each
         // example: pp=5: then buffers [0...4] are occupied
 
-    for (nn=0; nn<MAXNROF_PRNBYTES; nn++)
-        retbuf[nn] = uint8_t (Sdata_PRN_TEXT[0][nn]);     // restore oldest text
+        memcpy((char *)retbuf, // restore oldest text
+               (char const *)(&SharedMemBuffer::getData()->Sdata.PRN_TEXT[0][0]),
+               sizeof(SharedMemBuffer::getDataConst()->Sdata.PRN_TEXT[0]));
 
         // now copy textline [1] to [0], then
         // copy textline [2] to [1], then
         // copy textline [3] to [2] .... upto [pp-1] to [pp-2]
         // hint: copying from 9....0 would delete all strings!!!!!!
 
-    for (nn=0; nn<(pp-1); nn++)
-        tslib_strcpy(Sdata_PRN_TEXT[nn+1], Sdata_PRN_TEXT[nn], MAXNROF_PRNBYTES);
-    if (pPrnDataBuff>0)
-        pPrnDataBuff--;
-    pp=pPrnDataBuff;
+        for (int nn=0; nn < (pp-1); nn++) {
+            memmove((char *)(&SharedMemBuffer::getData()->Sdata.PRN_TEXT[nn+1][0]),
+                    (char const *)(&SharedMemBuffer::getDataConst()->Sdata.PRN_TEXT[nn][0]),
+                    sizeof(SharedMemBuffer::getDataConst()->Sdata.PRN_TEXT[0]));
+        }
+
+        if (SharedMemBuffer::getDataConst()->prn.pDataBuff > 0) {
+            SharedMemBuffer::getData()->prn.pDataBuff--;
+        }
+
+        pp = SharedMemBuffer::getDataConst()->prn.pDataBuff;
         // example: pp=4: then buffers [0...3] are still occupied, pp=0: all buffers empty
 
         // now clear highest copyed line (which got free now)
-    tslib_strclr(Sdata_PRN_TEXT[pp], 0, MAXNROF_PRNBYTES);
+        clear(SharedMemBuffer::getData()->Sdata.PRN_TEXT[pp]);
 
         // optionally: clear all remaining higher lines:
-    for (nn=(pp+1); nn<MAXNROF_PRNBLOCKS; nn++)
-         tslib_strclr(Sdata_PRN_TEXT[nn], 0, MAXNROF_PRNBYTES);
-
+        for (int nn = (pp+1); nn < MAXNROF_PRNBLOCKS; nn++) {
+            clear(SharedMemBuffer::getData()->Sdata.PRN_TEXT[nn]);
+        }
         return 0;
     }
 
-uint8_t gpi_chk4remainingText(void)
-{
-    // retval: 0: no more textline left (to send)  >0: nr of 64byte-blocks
-    return (pPrnDataBuff);
+    return 1; // no text in buffer
 }
 
-
-
-
-
-
-
-
-
+uint8_t gpi_chk4remainingText(void) {
+    // retval: 0: no more textline left (to send)  >0: nr of 64byte-blocks
+    return SharedMemBuffer::getDataConst()->prn.pDataBuff;
+}
 
 // ---------------------------------------------------------------------------------
 //   11.4.23 neu, Kommando direkt an "FastDevice"-protokoll senden, nicht mehr umsetzen
 // ---------------------------------------------------------------------------------
 
-
-// short command, 4 data bytes
-static uint8_t nextFDwrCmd[FDCMD_STACKDEPTH];
-static uint8_t nextFDrdCmd[FDCMD_STACKDEPTH];
-static uint8_t nextFDblkNr[FDCMD_STACKDEPTH];
-
-static uint8_t  nextFDpara1[FDCMD_STACKDEPTH];
-static uint8_t  nextFDpara2[FDCMD_STACKDEPTH];
-static uint8_t  nextFDpara3[FDCMD_STACKDEPTH];
-static uint8_t  nextFDpara4[FDCMD_STACKDEPTH];
-static uint8_t  p_nextFDcmdsInQueue;
 /* convention: use simple (not rotating) FIFO Stack:
 Example: nrOfCmdsInQueue=4 then
     nextAsynchsendCmd0[0]=cmd1      // was stored as first
@@ -483,191 +314,144 @@ Example: nrOfCmdsInQueue=4 then
     nrOfCmdsInQueue=3 now
 */
 
-
-void sendFDcmd_clrStack(void)
-{
-    uint8_t nn;
-    for (nn=0; nn<FDCMD_STACKDEPTH; nn++)
-    {
-        nextFDwrCmd[nn]=0;
-        nextFDrdCmd[nn]=0;
-        nextFDblkNr[nn]=0;
-        nextFDpara1[nn]=0;
-        nextFDpara2[nn]=0;
-        nextFDpara3[nn]=0;
-        nextFDpara4[nn]=0;
-    }
-    p_nextFDcmdsInQueue=0;
+void sendFDcmd_clrStack(void) {
+    clear(SharedMemBuffer::getData()->FDShort.wrCmd);
+    clear(SharedMemBuffer::getData()->FDShort.rdCmd);
+    clear(SharedMemBuffer::getData()->FDShort.blkNr);
+    clear(SharedMemBuffer::getData()->FDShort.para1);
+    clear(SharedMemBuffer::getData()->FDShort.para2);
+    clear(SharedMemBuffer::getData()->FDShort.para3);
+    clear(SharedMemBuffer::getData()->FDShort.para4);
+    SharedMemBuffer::getData()->FDShort.cmdsInQueue = 0;
 }
 
-bool sendFDcmd_set(uint8_t nextWrCmd, uint8_t nextRdCmd, uint8_t blockNum, uint8_t dat1, uint8_t dat2, uint8_t dat3, uint8_t dat4)
-{
+bool sendFDcmd_set(uint8_t nextWrCmd, uint8_t nextRdCmd, uint8_t blockNum,
+                   uint8_t dat1, uint8_t dat2, uint8_t dat3, uint8_t dat4) {
     // write Command to memory, wait for transport
-    if (p_nextFDcmdsInQueue>=FDCMD_STACKDEPTH)
-    {
-        qDebug() << "cannot save cmd because stack is full";
-        return false;           // not possible
-    }
-    nextFDwrCmd[p_nextFDcmdsInQueue]=nextWrCmd;
-    nextFDrdCmd[p_nextFDcmdsInQueue]=nextRdCmd;
-    nextFDblkNr[p_nextFDcmdsInQueue]=blockNum;
-    nextFDpara1[p_nextFDcmdsInQueue]=dat1;
-    nextFDpara2[p_nextFDcmdsInQueue]=dat2;
-    nextFDpara3[p_nextFDcmdsInQueue]=dat3;
-    nextFDpara4[p_nextFDcmdsInQueue]=dat4;
-    //qDebug() << "data with 4 data byte saved, pp=" << nrOfCmds4InQueue;
-    //qDebug() << " dat1=" << nextCmd4para1[nrOfCmds4InQueue] << " dat2=" << nextCmd4para2[nrOfCmds4InQueue]
-    //             << " dat3=" << nextCmd4para3[nrOfCmds4InQueue]  << " dat4=" << nextCmd4para4[nrOfCmds4InQueue];
-    p_nextFDcmdsInQueue++;
+    int const c = SharedMemBuffer::getDataConst()->FDShort.cmdsInQueue;
+    if (c < FDCMD_STACKDEPTH) {
+        SharedMemBuffer::getData()->FDShort.wrCmd[c] = nextWrCmd;
+        SharedMemBuffer::getData()->FDShort.rdCmd[c] = nextRdCmd;
+        SharedMemBuffer::getData()->FDShort.blkNr[c] = blockNum;
+        SharedMemBuffer::getData()->FDShort.para1[c] = dat1;
+        SharedMemBuffer::getData()->FDShort.para2[c] = dat2;
+        SharedMemBuffer::getData()->FDShort.para3[c] = dat3;
+        SharedMemBuffer::getData()->FDShort.para4[c] = dat4;
+        SharedMemBuffer::getData()->FDShort.cmdsInQueue = (c + 1);
         return true;                // ok, will be sent
     }
-
-bool sendFDcmd_get(uint8_t *nextWrCmd, uint8_t *nextRdCmd, uint8_t *blockNum, uint8_t *dat1, uint8_t *dat2, uint8_t *dat3, uint8_t *dat4)
-{
-    uint8_t nn, ll;
-
-    if (p_nextFDcmdsInQueue==0 || p_nextFDcmdsInQueue>FDCMD_STACKDEPTH)
+    qCritical() << "cannot save cmd because stack is full";
     return false; // not possible
+}
 
-    *nextWrCmd=nextFDwrCmd[0];
-    *nextRdCmd=nextFDrdCmd[0];
-    *blockNum=nextFDblkNr[0];
-    *dat1=nextFDpara1[0];
-    *dat2=nextFDpara2[0];
-    *dat3=nextFDpara3[0];
-    *dat4=nextFDpara4[0];
-    //qDebug() << "cmd4  restored to send from [0];  pp=" << nrOfCmds4InQueue;
-    //qDebug() << " data1: " << nextCmd4para1[0] << " data2: " << nextCmd4para2[0] <<
-    //            " data3: " << nextCmd4para3[0] << " data4: " << nextCmd4para4[0];
+bool sendFDcmd_get(uint8_t *nextWrCmd, uint8_t *nextRdCmd, uint8_t *blockNum,
+                   uint8_t *dat1, uint8_t *dat2, uint8_t *dat3, uint8_t *dat4) {
+
+    int const c = SharedMemBuffer::getDataConst()->FDShort.cmdsInQueue;
+
+    if ((c > 0)  && (c <= FDCMD_STACKDEPTH)) {
+        *nextWrCmd = SharedMemBuffer::getDataConst()->FDShort.wrCmd[c];
+        *nextRdCmd = SharedMemBuffer::getDataConst()->FDShort.rdCmd[c];
+        *blockNum = SharedMemBuffer::getDataConst()->FDShort.blkNr[c];
+        *dat1 = SharedMemBuffer::getDataConst()->FDShort.para1[c];
+        *dat2 = SharedMemBuffer::getDataConst()->FDShort.para2[c];
+        *dat3 = SharedMemBuffer::getDataConst()->FDShort.para3[c];
+        *dat4 = SharedMemBuffer::getDataConst()->FDShort.para4[c];
 
         // move Puffer down by one element
-    if (FDCMD_STACKDEPTH>0)
-        ll=FDCMD_STACKDEPTH-1;
-    else
-        ll=0;
-    for (nn=0; nn<ll; nn++)
-    {
-        nextFDwrCmd[nn]=nextFDwrCmd[nn+1];
-        nextFDrdCmd[nn]=nextFDrdCmd[nn+1];
-        nextFDblkNr[nn]=nextFDblkNr[nn+1];
-        nextFDpara1[nn]=nextFDpara1[nn+1];
-        nextFDpara2[nn]=nextFDpara2[nn+1];
-        nextFDpara3[nn]=nextFDpara3[nn+1];
-        nextFDpara4[nn]=nextFDpara4[nn+1];
+        for (int m = 0; m < c-1; ++m) {
+            int const n = m + 1;
+            SharedMemBuffer::getData()->FDShort.wrCmd[m] = SharedMemBuffer::getDataConst()->FDShort.wrCmd[n];
+            SharedMemBuffer::getData()->FDShort.rdCmd[m] = SharedMemBuffer::getDataConst()->FDShort.rdCmd[n];
+            SharedMemBuffer::getData()->FDShort.blkNr[m] = SharedMemBuffer::getDataConst()->FDShort.blkNr[n];
+            SharedMemBuffer::getData()->FDShort.para1[m] = SharedMemBuffer::getDataConst()->FDShort.para1[n];
+            SharedMemBuffer::getData()->FDShort.para2[m] = SharedMemBuffer::getDataConst()->FDShort.para2[n];
+            SharedMemBuffer::getData()->FDShort.para3[m] = SharedMemBuffer::getDataConst()->FDShort.para3[n];
+            SharedMemBuffer::getData()->FDShort.para4[m] = SharedMemBuffer::getDataConst()->FDShort.para4[n];
         }
-    if (p_nextFDcmdsInQueue>0)
-        p_nextFDcmdsInQueue--;
-    //qDebug() << "cmd4  after push down: pp=" << nrOfCmds4InQueue;
+        SharedMemBuffer::getData()->FDShort.cmdsInQueue = c - 1;
         return true;                // ok, will be sent
     }
+    return false;           // not possible
+}
 
-uint8_t check4FDshortCmd(void)
-{
-    // returns number of waiting command, max FDCMD_STACKDEPTH
-    return p_nextFDcmdsInQueue;
+uint8_t check4FDshortCmd(void) { // returns number of waiting command, max FDCMD_STACKDEPTH
+    return SharedMemBuffer::getDataConst()->FDShort.cmdsInQueue;
 }
 
 
-uint8_t check4freeFDshortCmd(void)
-{
-    // returns number of free places in short-command stack
-    return FDCMD_STACKDEPTH - p_nextFDcmdsInQueue;
+uint8_t check4freeFDshortCmd(void) { // returns number of free places in short-command stack
+    return FDCMD_STACKDEPTH - SharedMemBuffer::getDataConst()->FDShort.cmdsInQueue;
 }
 
-
-// long command, 64 data bytes
-static uint8_t longFDwrCmd[FDLONG_STACKDEPTH];
-static uint8_t longFDrdCmd[FDLONG_STACKDEPTH];
-static uint8_t longFDblkNr[FDLONG_STACKDEPTH];
-static uint8_t longFDlength[FDLONG_STACKDEPTH];
-
-static uint8_t  longFDpara[FDLONG_STACKDEPTH][64];
-static uint8_t  p_longFDcmdsInQueue;
-
-
-void longFDcmd_clrStack(void)
-{
-    uint8_t nn, mm;
-    for (nn=0; nn<FDLONG_STACKDEPTH; nn++)
-    {
-        longFDwrCmd[nn]=0;
-        longFDrdCmd[nn]=0;
-        longFDblkNr[nn]=0;
-        longFDlength[nn]=0;
-        for (mm=0; mm<64; mm++)
-            longFDpara[nn][mm]=0;
-    }
-    p_longFDcmdsInQueue=0;
+void longFDcmd_clrStack(void) {
+    clear(SharedMemBuffer::getData()->FDLong.wrCmd);
+    clear(SharedMemBuffer::getData()->FDLong.rdCmd);
+    clear(SharedMemBuffer::getData()->FDLong.blkNr);
+    clear(SharedMemBuffer::getData()->FDLong.length);
+    clear(SharedMemBuffer::getData()->FDLong.para);
+    SharedMemBuffer::getData()->FDLong.cmdsInQueue = 0;
 }
 
-
-bool longFDcmd_set(uint8_t nextWrCmd, uint8_t nextRdCmd, uint8_t blockNum, uint8_t length, uint8_t *data)
-{
+bool longFDcmd_set(uint8_t nextWrCmd, uint8_t nextRdCmd, uint8_t blockNum,
+                   uint8_t length, uint8_t const *data) {
     // write Command to memory, wait for transport
     // data buffer size always 64! data[64], padded with 0
-    uint8_t nn;
-    if (p_longFDcmdsInQueue>=FDLONG_STACKDEPTH)
-    {
-        qDebug() << "cannot save cmd because stack is full";
-        return false;           // not possible
-    }
-    longFDwrCmd[p_longFDcmdsInQueue]=nextWrCmd;
-    longFDrdCmd[p_longFDcmdsInQueue]=nextRdCmd;
-    longFDblkNr[p_longFDcmdsInQueue]=blockNum;
-    longFDlength[p_longFDcmdsInQueue]=length;
-    for (nn=0; nn<64; nn++)
-        longFDpara[p_longFDcmdsInQueue][nn]=data[nn];
+    int const c = SharedMemBuffer::getDataConst()->FDLong.cmdsInQueue;
 
-    p_longFDcmdsInQueue++;
+    if (c > 0 && c <= FDLONG_STACKDEPTH) {
+        SharedMemBuffer::getData()->FDLong.wrCmd[c] = nextWrCmd;
+        SharedMemBuffer::getData()->FDLong.rdCmd[c] = nextRdCmd;
+        SharedMemBuffer::getData()->FDLong.blkNr[c] = blockNum;
+        SharedMemBuffer::getData()->FDLong.length[c] = length;
+        memcpy((char *)SharedMemBuffer::getData()->FDLong.para[c],
+               (char const *)data,
+                sizeof(SharedMemBuffer::getDataConst()->FDLong.para[0]));
+
+        SharedMemBuffer::getData()->FDLong.cmdsInQueue = c + 1;
         return true;                // ok, will be sent
     }
-
-bool longFDcmd_get(uint8_t *nextWrCmd, uint8_t *nextRdCmd, uint8_t *blockNum, uint8_t *length, uint8_t *data)
-{
-    uint8_t nn, mm, ll;
-
-    if (p_longFDcmdsInQueue==0 || p_longFDcmdsInQueue>FDLONG_STACKDEPTH)
+    qCritical() << "cannot save cmd because stack is full";
     return false;           // not possible
+}
 
-    *nextWrCmd= longFDwrCmd[0];
-    *nextRdCmd= longFDrdCmd[0];
-    *blockNum = longFDblkNr[0];
-    *length   = longFDlength[0];
-    for (mm=0; mm<64; mm++)
-        data[mm] = longFDpara[0][mm];
+bool longFDcmd_get(uint8_t *nextWrCmd, uint8_t *nextRdCmd, uint8_t *blockNum,
+                   uint8_t *length, uint8_t *data) {
+
+    int const c = SharedMemBuffer::getDataConst()->FDLong.cmdsInQueue;
+
+    if (c > 0 && c <= FDLONG_STACKDEPTH) {
+        *nextWrCmd = SharedMemBuffer::getDataConst()->FDLong.wrCmd[c];
+        *nextRdCmd = SharedMemBuffer::getDataConst()->FDLong.rdCmd[c];
+        *blockNum  = SharedMemBuffer::getDataConst()->FDLong.blkNr[c];
+        *length    = SharedMemBuffer::getDataConst()->FDLong.length[c];
+        memcpy((char *)data,
+               (char const *)SharedMemBuffer::getDataConst()->FDLong.para[c],
+                sizeof(SharedMemBuffer::getDataConst()->FDLong.para[0]));
 
         // move Puffer down by one element
-    if (FDLONG_STACKDEPTH>0)
-        ll=FDLONG_STACKDEPTH-1;
-    else
-        ll=0;
-    for (nn=0; nn<ll; nn++)
-    {
-        longFDwrCmd[nn]  = longFDwrCmd[nn+1];
-        longFDrdCmd[nn]  = longFDrdCmd[nn+1];
-        longFDblkNr[nn]  = longFDblkNr[nn+1];
-        longFDlength[nn] = longFDlength[nn+1];
-
-        for (mm=0; mm<64; mm++)
-            longFDpara[nn][mm] = longFDpara[nn+1][mm];
-
+        for (int m = 0; m < c-1; ++m) {
+            int const n = m + 1;
+            SharedMemBuffer::getData()->FDLong.wrCmd[m] = SharedMemBuffer::getDataConst()->FDLong.wrCmd[n];
+            SharedMemBuffer::getData()->FDLong.rdCmd[m] = SharedMemBuffer::getDataConst()->FDLong.rdCmd[n];
+            SharedMemBuffer::getData()->FDLong.blkNr[m] = SharedMemBuffer::getDataConst()->FDLong.blkNr[n];
+            SharedMemBuffer::getData()->FDLong.length[m] = SharedMemBuffer::getData()->FDLong.length[n];
+            memcpy((char *)SharedMemBuffer::getData()->FDLong.para[m],
+                   (char const *)SharedMemBuffer::getData()->FDLong.para[n],
+                   sizeof(SharedMemBuffer::getDataConst()->FDLong.para[0]));
         }
-    if (p_longFDcmdsInQueue>0)
-        p_longFDcmdsInQueue--;
-
+        SharedMemBuffer::getData()->FDLong.cmdsInQueue = c - 1;
         return true;                // ok, will be sent
     }
 
-uint8_t check4FDlongCmd(void)
-{
-    // returns number of waiting command
-    return p_longFDcmdsInQueue;
+    qCritical() << "cannot save cmd because stack is full";
+    return false;           // not possible
 }
 
-uint8_t check4freeFDlongCmd(void)
-{
-    // returns number of free places in command stack
-    return FDLONG_STACKDEPTH - p_longFDcmdsInQueue;
+uint8_t check4FDlongCmd(void) { // returns number of waiting command
+    return SharedMemBuffer::getDataConst()->FDLong.cmdsInQueue;
 }
 
-
+uint8_t check4freeFDlongCmd(void) { // returns number of free places in command stack
+    return FDLONG_STACKDEPTH - SharedMemBuffer::getDataConst()->FDLong.cmdsInQueue;
+}

src/serial_port_thread.cpp

@@ -0,0 +1,15 @@
+#include "serial_port_thread.h"
+
+
+SerialPortThread::SerialPortThread(QObject *parent)
+    : QThread(parent) {
+    this->setObjectName("SerialPortThread");
+}
+
+SerialPortThread::~SerialPortThread() {
+    m_loop.quit();
+}
+
+void SerialPortThread::run() {
+    m_loop.exec();
+}

src/serial_port_worker.cpp

@@ -0,0 +1,244 @@
+#include "serial_port_worker.h"
+#include "serial_port_thread.h"
+
+#include <QDebug>
+#include <QCoreApplication>
+
+std::atomic<uint8_t> Command::m_nextSendBufferIndex{0};
+std::atomic<uint8_t> Command::m_nextRecvBufferIndex{0};
+char Command::m_sendBuffers[256][SEND_BLOCK_SIZE]{{0}};
+char Command::m_recvBuffers[256][SEND_BLOCK_SIZE]{{0}};
+
+uint32_t Command::getNextCommandPriority(uint8_t priorityClass) {
+    static std::atomic<std::uint32_t> priority_1{0};
+    static std::atomic<std::uint32_t> priority_2{1000000000};
+    static std::atomic<std::uint32_t> priority_3{2000000000};
+    static std::atomic<std::uint32_t> priority_4{3000000000};
+    switch (priorityClass) {
+    case PRIORITY_1:
+        return priority_1.fetch_add(1);
+    case PRIORITY_2:
+        return priority_2.fetch_add(1);
+    case PRIORITY_3:
+        return priority_3.fetch_add(1);
+    case PRIORITY_4:
+        return priority_4.fetch_add(1);
+    }
+    return -1;
+}
+
+char *Command::getNextSendBuffer() {
+    uint8_t const nextIndex = m_nextSendBufferIndex.fetch_add(1);
+    return &m_sendBuffers[nextIndex][0];
+}
+
+char *Command::getNextRecvBuffer() {
+    uint8_t const nextIndex = m_nextRecvBufferIndex.fetch_add(1);
+    return &m_recvBuffers[nextIndex][0];
+}
+
+Command::Command(uint16_t cmdId, uint8_t sendBufferLength,
+                 uint8_t recvBufferLength, uint8_t priorityClass)
+    : m_priority(getNextCommandPriority(priorityClass))
+    , m_priorityClass(priorityClass)
+    , m_cmdId(cmdId)
+    , m_sendBuffer(Command::getNextSendBuffer())
+    , m_recvBuffer(Command::getNextRecvBuffer())
+    , m_sendBufferLength(sendBufferLength)
+    , m_recvBufferLength(recvBufferLength) {
+    memset(m_sendBuffer, 0x00, sizeof(m_sendBuffers[0]));
+}
+
+Command::Command()
+    : m_priority(0)
+    , m_priorityClass(0)
+    , m_cmdId(0)
+    , m_sendBuffer(0)
+    , m_recvBuffer(0)
+    , m_sendBufferLength(0)
+    , m_recvBufferLength(0) {
+}
+
+/**
+* \brief Constructor for SerialPort
+*
+* @date 08.11.2022 – first draft.
+*
+*/
+SerialPortWorker::SerialPortWorker(QString portName, enum QSerialPort::BaudRate baudRate, QObject *parent)
+    : QThread(parent)
+    , m_serialPort()
+    , m_serialPortOpened(false)
+    , m_portName(portName)
+    , m_baudRate(baudRate)
+    , m_bytesWritten(0) {
+    this->setObjectName("SerialPortWorker");
+
+    foreach (const QSerialPortInfo &info, QSerialPortInfo::availablePorts()) {
+        if (!info.isNull()) {
+            qDebug() << "Name .......... " << info.portName();
+            qDebug() << "Description ... " << info.description();
+            qDebug() << "Manufacturer .. " << info.manufacturer();
+            qDebug() << "SerialNumber .. " << info.serialNumber();
+            if (info.hasProductIdentifier()) {
+                qDebug() << "Product-ID .... " << info.productIdentifier();
+            }
+            if (info.hasVendorIdentifier()) {
+                qDebug() << "Vendor-ID ..... " << info.vendorIdentifier();
+            }
+            qDebug() << "Location ...... " << info.systemLocation();
+
+            if (info.portName() == m_portName) {
+                m_serialPortInfo = info;
+            }
+        }
+    }
+
+    if (m_serialPortInfo.portName() == m_portName) {
+        m_serialPort.setPort(m_serialPortInfo);
+        m_serialPort.setPortName(m_portName);
+        m_serialPort.setDataBits(QSerialPort::Data8);
+        m_serialPort.setParity(QSerialPort::NoParity);
+        m_serialPort.setStopBits(QSerialPort::OneStop);
+        m_serialPort.setFlowControl(QSerialPort::NoFlowControl);
+        m_serialPortOpened = m_serialPort.open(QIODevice::ReadWrite);
+    }
+}
+
+SerialPortWorker::~SerialPortWorker() {
+    closeSerialPort();
+}
+
+void SerialPortWorker::run() {
+    SerialPortThread serialPortThread;
+    this->moveToThread(&serialPortThread); // not really necessary
+
+    // Note: because this thread is moved to serialPortThread, the event loop
+    // used will be the one of serialPortThread (this-thread does not even have one).
+    // This is the only purpose of serialPortThread.
+    serialPortThread.start();
+
+    connect(&m_serialPort, SIGNAL(readyRead()), this, SLOT(getBytesAvailable()));
+    connect(&m_serialPort, SIGNAL(bytesWritten(qint64)), this, SLOT(getNumberOfBytesWritten(qint64)));
+
+    while (m_serialPortOpened) {
+        Command nextCmd = getNextCommand();
+        if (nextCmd.m_cmdId == Command::QUIT_SENTINEL) {
+            break;
+        }
+        QByteArray data(nextCmd.getNextSendBuffer(), nextCmd.m_sendBufferLength);
+        m_bytesWritten = 0;
+        m_serialPort.write(data);
+        // process events in event loop of associated thread
+        serialPortThread.getEventLoop().processEvents(QEventLoop::ExcludeUserInputEvents, TIMEOUT);
+        int maxWaitTime = WAIT_TIME_MAX;
+
+        while (maxWaitTime > 0 && m_bytesWritten < (uint32_t)data.size()) {
+            if (!m_serialPort.waitForBytesWritten(100)) { // wait timeout-ms for the bytes to be written
+                // process events in event loop of associated thread
+                serialPortThread.getEventLoop().processEvents(QEventLoop::ExcludeUserInputEvents, TIMEOUT);
+                maxWaitTime -= TIMEOUT;
+            }
+        }
+        if (m_bytesWritten == (uint32_t)data.size()) { // data written, wait for result
+            if (nextCmd.m_recvBufferLength > 0) {
+                // process events in event loop of associated thread
+                serialPortThread.getEventLoop().processEvents(QEventLoop::ExcludeUserInputEvents, TIMEOUT);
+                maxWaitTime = WAIT_TIME_MAX;
+                while (maxWaitTime > 0 && m_bytesAvailable < nextCmd.m_recvBufferLength) {
+                    if (!m_serialPort.waitForReadyRead(100)) {
+                        // process events in event loop of associated thread
+                        serialPortThread.getEventLoop().processEvents(QEventLoop::ExcludeUserInputEvents, TIMEOUT);
+                        maxWaitTime -= TIMEOUT;
+                    }
+                }
+                uint32_t const bytesAvailable = m_bytesAvailable;
+                if (bytesAvailable == nextCmd.m_recvBufferLength) {
+                    QByteArray result = m_serialPort.read(bytesAvailable);
+                    if (!result.isEmpty() && ((uint32_t)result.size() == bytesAvailable)) {
+                        memcpy(nextCmd.m_recvBuffer, result.data(), bytesAvailable);
+                        insertResult(nextCmd);
+                    }
+                } else {
+                    // error
+                }
+            }
+        } else {
+            // error
+        }
+    } // while (m_serialPortOpened)
+
+    serialPortThread.quit();
+    serialPortThread.wait();
+}
+
+bool SerialPortWorker::openSerialPort() {
+    if (!m_serialPortOpened) {
+        return m_serialPort.open(QIODevice::ReadWrite);
+    }
+    return false; // opening twice is not allowed
+}
+
+void SerialPortWorker::closeSerialPort() {
+    if (m_serialPortOpened) {
+        m_serialPort.close();
+        m_serialPortOpened = false;
+    }
+}
+
+void SerialPortWorker::quit() {
+    Command cmd(Command::QUIT_SENTINEL, 0, 0, Command::PRIORITY_1);
+    insertCommand(cmd);
+}
+
+void SerialPortWorker::insertCommand(Command const &cmd) {
+    {   std::lock_guard<std::mutex> lock(m_sendQueueMutex);
+        m_sendQueue.push(cmd);
+    } // release lock
+    m_sendQueueCondVar.notify_one();
+}
+
+Command SerialPortWorker::getNextCommand() {
+    Command nextCmd;
+    {   std::unique_lock<std::mutex> lock(m_sendQueueMutex);
+        m_sendQueueCondVar.wait(lock, [this]{ return !this->m_sendQueue.empty(); });
+        nextCmd = m_sendQueue.top();
+        m_sendQueue.pop();
+    } // release lock
+    return nextCmd;
+}
+
+void SerialPortWorker::insertResult(Command const &result) {
+    {   std::lock_guard<std::mutex> lock(m_recvQueueMutex);
+        m_recvQueue.push_back(result);
+    } // release lock
+    m_recvQueueCondVar.notify_one();
+}
+
+bool SerialPortWorker::getNextResult(Command &nextResult, int timeout) {
+    bool timed_out = false;
+    {   std::unique_lock<std::mutex> lock(m_recvQueueMutex);
+        if (m_recvQueueCondVar.wait_for(lock, std::chrono::milliseconds(timeout),
+                                    [this]{ return !this->m_recvQueue.empty(); })) {
+            nextResult = m_recvQueue.front();
+            m_recvQueue.pop_front();
+            return true;
+        } else {
+            timed_out = true;
+        }
+    } // release lock
+    return (timed_out == false);
+}
+
+void SerialPortWorker::getBytesAvailable() {
+    m_bytesAvailable += m_serialPort.bytesAvailable();
+}
+
+bool SerialPortWorker::getNumberOfBytesWritten(qint64 bytesWritten) {
+    if (bytesWritten > 0) {
+        m_bytesWritten += (uint32_t)bytesWritten;
+        return true;
+    }
+    return false;
+}
+

src/shared_mem_buffer.cpp

@@ -1,6 +1,7 @@
 #include "shared_mem_buffer.h"
 
 #include <QDebug>
+#include <QCoreApplication>
 #include <atomic>
 
 #ifdef QT_POSIX_IPC
@@ -12,6 +13,12 @@
 #include <sys/ipc.h>    // ftok
 #endif
 
+#ifdef __linux__
+#include <unistd.h>
+#endif
+
+#define PROCESS_SHARED (PTHREAD_PROCESS_SHARED)
+
 // std::atomic_bool SharedMemBuffer::__sharedMemLocked{false};
 
 QSharedMemory *SharedMemBuffer::getShm(std::size_t size) {
@@ -22,6 +29,83 @@ QSharedMemory *SharedMemBuffer::getShm(std::size_t size) {
         shMem.setKey(fkey);
         if (!shMem.isAttached()) {
             if (shMem.create(size)) {
+                // the creator is the owner of the shared-memory segment
+                SharedMemBuffer *shm = (SharedMemBuffer *)(shMem.data());
+                if (shm) {
+                    shm->init = 0;
+                    // mark the shm
+                    memset(shm->appName, 0x00, sizeof(shm->appName));
+                    strncpy(shm->appName,
+                            QCoreApplication::applicationName().toLocal8Bit().constData(),
+                            sizeof(shm->appName)-1);
+                    shm->pid = getpid();
+
+                    // create condition variables plus associated mutexes for
+                    // sending/receiving commands to dc
+                    int r = 0;
+                    if ((r = pthread_mutexattr_init(&shm->sndMtxA)) != 0) {
+                        qCritical() << "init mutex attribute"
+                                    << strerror(errno) << r;
+                    }
+                    if ((r == 0) &&
+                        (r = pthread_mutexattr_setpshared(
+                                &shm->sndMtxA, PTHREAD_PROCESS_SHARED) != 0)) {
+                        qCritical() << "set s-mutex attribute to process shared"
+                                    << strerror(errno) << r;
+                    }
+                    if ((r == 0) &&
+                        (r = pthread_mutex_init(&shm->sndMtx,
+                                                &shm->sndMtxA) != 0)) {
+                        qCritical() << "init s-mutex" << strerror(errno) << r;
+                    }
+                    if ((r == 0) &&
+                        (r = pthread_condattr_init(&shm->sndCndA) != 0)) {
+                        qCritical() << "init s-mutex" << strerror(errno) << r;
+                    }
+                    if ((r == 0) &&
+                        (r = pthread_condattr_setpshared(
+                                &shm->sndCndA, PTHREAD_PROCESS_SHARED) != 0)) {
+                        qCritical() << "init s-cond attribute to process shared"
+                                    << strerror(errno) << r;
+                    }
+                    if ((r == 0) &&
+                        (r = pthread_cond_init(&shm->sndCndV,
+                                               &shm->sndCndA) != 0)) {
+                        qCritical() << "init s-condvar" << strerror(errno) << r;
+                    }
+
+                    if ((r = pthread_mutexattr_init(&shm->rcvMtxA)) != 0) {
+                        qCritical() << "init r-mutex attribute"
+                                    << strerror(errno) << r;
+                    }
+                    if ((r == 0) &&
+                        (r = pthread_mutexattr_setpshared(
+                                &shm->rcvMtxA, PTHREAD_PROCESS_SHARED) != 0)) {
+                        qCritical() << "set r-mutex attribute to process shared"
+                                    << strerror(errno) << r;
+                    }
+                    if ((r == 0) &&
+                        (r = pthread_mutex_init(&shm->rcvMtx,
+                                                &shm->rcvMtxA) != 0)) {
+                        qCritical() << "init r-mutex" << strerror(errno) << r;
+                    }
+                    if ((r == 0) &&
+                        (r = pthread_condattr_init(&shm->rcvCndA) != 0)) {
+                        qCritical() << "init r-mutex" << strerror(errno) << r;
+                    }
+                    if ((r == 0) &&
+                        (r = pthread_condattr_setpshared(
+                                &shm->rcvCndA, PTHREAD_PROCESS_SHARED) != 0)) {
+                        qCritical() << "init r-cond attribute to process shared"
+                                    << strerror(errno) << r;
+                    }
+                    if ((r == 0) &&
+                        (r = pthread_cond_init(&shm->rcvCndV,
+                                               &shm->rcvCndA) != 0)) {
+                        qCritical() << "init s-condvar" << strerror(errno) << r;
+                    }
+                    shm->init = 1;
+                }
                 return &shMem;
             } else {
                 if (shMem.error() == QSharedMemory::AlreadyExists) {