ar708_sampling.c

/*****************************************************************************
//
//     File:
//        ar708_sampling.c
//
//       Copyright (c) MAX Technologies Inc. 1988-2015, All Rights Reserved.
//             CONFIDENTIAL AND PROPRIETARY INFORMATION WHICH IS THE 
//                         PROPERTY OF MAX TECHNOLOGIES INC. 
//
//      This example demonstrates the basic usage of ARINC 708 channel class
//      for transmission and reception with sampling.
//
//       Hardware requirements:
//          - MAXT Flex with A708 option.
//          - Loopback between TX and RX channels if internal loopback is not used.
//
*****************************************************************************/

#include "example.h"

#define MAX_TX_RECORDS_TO_TRANSMIT     10
#define BUFFER_SIZE  MAX_TX_RECORDS_TO_TRANSMIT*sizeof(MXF_A708_DATAREC)

// #define LOCAL
//#define LOOPBACK

void DisplayDataArray(uint64 recNum, MXF_A708_DATAREC* rec);
void DisplaySampDataArray(uint64 recNum, MXF_A708_SAMPREC* rec);

int main(void)
{
uint32               rc;
HMXF_SERVER          server=0;
HMXF_DEVICE          device=0;
HMXF_MODULE          module=0;
HMXF_CHANNEL         rxChannel=0;
HMXF_CHANNEL         txChannel=0;
HMXF_BUFFER          rxBuffer=0;
HMXF_BUFFER          txBuffer=0;
MXF_A708_DATAREC*    rec=0;
uint64               moduleCount=0;
uint64               channelCount=0;
MXF_A708_DATAREC*    txHostBuffer=0;
MXF_A708_SAMPREC*    hostBuffer=NULL;
HMXF_SCHED           schedule=0;
uint64 i, msgsCount, bytesCount;
HMXF_SCHED_MSG msg=0;
uint64 data, word;

   // Connects to services and initialize environment
#ifdef LOCAL
   rc = mxfServerConnect("0.0.0.0", "", "", FALSE, &server);
#else
   rc = mxfServerConnect("192.168.0.1", "admin", "admin", FALSE, &server);
#endif

   // Initializes MX Foundation library
   if (!rc)
   {
      printf("Starting ...\n");
      rc = mxfSystemInit(server);
   }

   // Gets the device handle 
   if (!rc)
      rc = mxfSystemDeviceGet(server, 0, &device);

   // Gets handle of first ARINC 708 module
   if (!rc)
      rc = mxfDeviceModuleAllGet(device, MXF_MODULE_A708_EH, 1, &moduleCount, &module);

   // If module not found, return an error
   if(!rc && !moduleCount)
      rc = MAXT_ERROR_NOT_FOUND;

   // Activates the ARINC 708 module (because the MIL-STD-1553 is by default activated, except on FM1553-2)
   if (!rc)
   {
      rc = mxfAttributeUint64Set(module, KMXF_A708_MODULE_ACTIVE, TRUE);
      if (rc == MAXT_ERROR_NOT_SUPPORTED) // Attribute not supported on FM1553-2, simply ignore
         rc = MAXT_SUCCESS;
   }

   // Gets handle of first ARINC 708 RX channel
   if(!rc)
      rc = mxfModuleChannelAllGet(module, MXF_CLASS_A708, MXF_SCLASS_RX_CHANNEL, 1, &channelCount, &rxChannel);

   // Gets handle of first ARINC 708 TX channel
   if (!rc && channelCount)
      rc = mxfModuleChannelAllGet(module, MXF_CLASS_A708, MXF_SCLASS_TX_CHANNEL, 1, &channelCount, &txChannel);

   // Enables loopback
   #ifdef LOOPBACK
   if(!rc)
      rc = mxfAttributeUint64Set(rxChannel, KMXF_A708_TX_RX_TEST_LB , VMXF_ENABLE);
   #endif

   // Alloc Rx host buffer
   if(!rc)
   {
      hostBuffer = (MXF_A708_SAMPREC *)malloc(BUFFER_SIZE);
      if(!hostBuffer)
         rc = MAXT_ERROR_MEM;
   }

   // Tx host buffer allocation
   if(!rc)
   {
      txHostBuffer = (MXF_A708_DATAREC*)malloc(BUFFER_SIZE);
      if(!txHostBuffer)
         rc = MAXT_ERROR_MEM;
   }

   // Sets timebase to RTC usec
   if(!rc)
      rc = mxfSystemTimeBaseSet(server, MXF_TIMEBASE_DEVICE_USEC);

   // Allocate RX sampling buffer
   if(!rc)
      rc = mxfRxSamplingBufferAlloc(rxChannel, BUFFER_SIZE, &rxBuffer, NULL);

   // Sets sampling kill time to 5 seconds.
   if (!rc)
      rc = mxfRxSamplingKilltimeSet(rxBuffer, 5000000);

   // Start sampling
   if(!rc)
      rc = mxfRxSamplingStart(rxBuffer);

   if(!rc)
      printf("Sampling started\n\r");

   // Allocate TX Periodic Update buffer
   if(!rc)
      rc = mxfTxPeriodicUpdateMsgBufferAlloc(txChannel, 0, BUFFER_SIZE, &txBuffer, NULL);

   // Create the periodic scheduler
   if(!rc)
      rc = mxfTxPeriodicScheduleNew(txChannel, &schedule);

   // Set scheduling values: Rate=5 ms, Phase=0 us
   if(!rc)
      rc = mxfTxPeriodicScheduleMsgAdd(schedule, 5000, 0, &msg);

   // Define the number of buffer for the list and link to it
   if(!rc)
      rc = mxfTxPeriodicScheduleBufferListAdd(msg, 1, 0, &txBuffer);
   
   // Set records for the buffers
   if(!rc)
   {
      rec =txHostBuffer;
      //Prepares a buffer with a record that will be read by the sampling
      for(data=0; data<MAX_TX_RECORDS_TO_TRANSMIT; data++)
      {
         rec->timeTag      = 0;
         rec->control      = 0;
         rec->repeatCount  = 100;
         rec->manchesterBitErr = 0;
         rec->dataSize = 200;  //200 bytes corresponds to 1600 bits (see ARINC 708 specification)
         for(word=0; word < rec->dataSize/2; word++)
         {
            switch(word)
            {
            case 0:
               rec->data[word] = 055; // Label
               break;
            case 1:
            case 2:
            case 3:
               rec->data[word] = 0x0000;
               break;
            default:
              rec->data[word] = (uint16)(0x0101*data);
            }
         }
         rc = mxfA708NextDataRecordPtrGet(rec, &rec);
      }
   }

   // Transmits strings on relative record time
   if(!rc)
      rc = mxfA708TxPeriodicUpdateMsgWrite(txBuffer, MAX_TX_RECORDS_TO_TRANSMIT, txHostBuffer);

   // Run the schedule now
   if(!rc)
      rc = mxfTxPeriodicScheduleRun(schedule);

   // Read and display records for 5 seconds
   for(i=0; i<10 && !rc; i++)
   {
      rc = mxfA708RxSamplingRead(rxBuffer, MXF_RXSAMPLING_FLAG_DEFAULT, 0, BUFFER_SIZE, &msgsCount, &bytesCount, hostBuffer);
      if(!rc)
      {
         printf("Read %llu messages\n\r", msgsCount);

         DisplaySampDataArray(msgsCount, hostBuffer);
      }
   
      if(rc)
         printf("Sampling read failed; rc=0x%08x\n", rc);
      else
         mxfSleep(500);
   }

   // Stop transmission
   if(!rc)
      rc = mxfTxPeriodicScheduleFree(schedule);
    
   // Stop sampling
   if(!rc)
      rc = mxfRxSamplingStop(rxBuffer);

    if (!rc)
   {
     printf("\nAcquisition stopped\n\r");
   }

   // Frees device and host buffers
    if (rxBuffer)
       mxfRxSamplingBufferFree(rxBuffer);
    if (txBuffer)
      mxfTxPeriodicUpdateMsgBufferFree(txBuffer);

   if(txHostBuffer)
      free(txHostBuffer);
   if(hostBuffer)
      free(hostBuffer);

   if(rc)
   {
   char errorString[200];

      if(mxfSystemErrorStringGet(server, rc, sizeof(errorString), errorString))
         sprintf (errorString,"ERROR # 0x%X", rc);

      printf("%s\n\r", errorString);
   }

   printf("Terminating ...\n");

   // Unloads MX Foundation library
   mxfSystemTerminate(server);

   // Disconnects from MX Foundation library
   mxfServerDisconnect(server);

   printf("\nPress a key to terminate\n");
   getchar();

   return rc;
}


void DisplayDataArray(uint64 recNum, MXF_A708_DATAREC* rec)
{
uint64 iRec,
       iData;
MXF_A708_DATAREC *p=rec;

   printf("\n");
   for(iRec=0; iRec < recNum; iRec++)
   {
      printf("%03llu %010llu 0x%08x %02u ",  iRec, p->timeTag, p->control, p->dataSize);
      for(iData=0; iData < p->dataSize/2; iData++)
      {
         printf("%04x ", p->data[iData]);

         if(!((iData+1)%8) && (iData+1 < p->dataSize/2))
            printf("\n                              ");
      }
      
      printf("\n");

      mxfA708NextDataRecordPtrGet(p, &p);
   }
}

void DisplaySampDataArray(uint64 recNum, MXF_A708_SAMPREC* rec)
{
uint64 iRec,
       iData;
MXF_A708_SAMPREC *p=rec;

   printf("\n");
   for(iRec=0; iRec < recNum; iRec++)
   {
      printf("%03llu %010llu 0x%08x %02u ",  iRec, p->timeTag, p->control, p->dataSize);
      for(iData=0; iData < p->dataSize/2; iData++)
      {
         printf("%04x ", p->data[iData]);

         if(!((iData+1)%8) && (iData+1 < p->dataSize/2))
            printf("\n                              ");
      }
      
      printf("\n");

      mxfA708NextSamplingRecordPtrGet(p, &p);
   }
}