dac_relative_timing.c

/*****************************************************************************
//
//     File:
//        dac_relative_timing.c
//
//       Copyright (c) MAX Technologies Inc. 1988-2021, All Rights Reserved.
//             CONFIDENTIAL AND PROPRIETARY INFORMATION WHICH IS THE 
//                         PROPERTY OF MAX TECHNOLOGIES INC. 
//
//       This example demonstrates the configuration of an IPM-DAC module and perform
//       relative timing record transmission on 8 single-ended channels.
//
//       Hardware requirements:
//          - MAXT 500 series carrier with IPM-DAC (jumpers must be set for +/- 10V operation).
//
*****************************************************************************/

#include "example.h"

#define MAX_ANALOG_CHN_NUM 8

#define MAX_REC 10

int main(void)
{
uint32       rc;
HMXF_SERVER server;
HMXF_MODULE module=0;
HMXF_CHANNEL txChn[MAX_ANALOG_CHN_NUM];
HMXF_BUFFER txBuffer[MAX_ANALOG_CHN_NUM];
MXF_ANALOG_DATAREC recANALOG[MAX_REC];
MXF_ANALOG_DATAREC* p;
int         iPort, iRec;
uint64 count;

   // Connect to services and initialize environment
   rc = mxfServerConnect("0.0.0.0", "", "", FALSE, &server);
   if (rc != MAXT_SUCCESS)
   {
      printf("Failed to connect; rc=0x%08x", rc);
      printf("\nPress a key to terminate\n");
      getchar();
      return 0;
   }

   // Initialize the server
   printf("\nStarting\n");

   rc = mxfSystemInit(server);

   // Get a handle to 8 Analog IPM-DAC channel
   if (!rc)
      rc = mxfChannelAllGet(server, MXF_CLASS_ANALOG, MXF_SCLASS_TX_CHANNEL, MXF_MODULE_ALL, MAX_ANALOG_CHN_NUM, &count, txChn);

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

   if (!rc)
      rc = mxfChannelInfoGet(txChn[0], NULL, &module);

   // Set time base 
   if(!rc)
      rc = mxfSystemTimeBaseSet(server, MXF_TIMEBASE_DEVICE_USEC);

   // Set the outut range to +/-10v
   if(!rc)
      rc = mxfAttributeUint64Set(module, KMXF_ANALOG_MODULE_DAC_OUTPUT_RANGE, VMXF_ANALOG_MODULE_DAC_OUTPUT_RANGE_10v);

   // Set the first channel slope to 0.5
   if (!rc)
      rc = mxfAttributeDoubleSet(txChn[0], KMXF_ANALOG_CHN_CALIBRATION_SLOPE, 0.5);

   for(iPort=0;!rc && iPort<MAX_ANALOG_CHN_NUM;iPort++)
   {
      // Allocate TX aperiodic buffer
      rc = mxfTxAperiodicBufferAlloc(txChn[iPort], MXF_TXAPERIODIC_PRIORITY_NORMAL, sizeof(recANALOG), &txBuffer[iPort], NULL);

      if(!rc)
      {
         p = recANALOG;
         for (iRec=0; !rc && iRec<MAX_REC; iRec++)
         {
            p->timeTag = iRec*1000000;
            p->control = 0;
            p->repeatCount = 1;
            p->reserved = 0;
            p->data.value = (float)iRec;
            rc = mxfAnalogNextDataRecordPtrGet(p, &p);
         }
         if(!rc)
            rc = mxfAnalogTxAperiodicWrite(txBuffer[iPort], MXF_TXAPERIODIC_FLAG_USE_RECORD_RELATIVE_TIME, 0, MAX_REC, recANALOG);
      }
   }

   // Wait a little
   if(!rc)
      mxfSleep(10000);

   if (rc)
   {
      char buffer[256];

      if (mxfSystemErrorStringGet(server, rc, sizeof(buffer), buffer))
         sprintf(buffer, "ERROR # 0x%08X", rc);

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

   // Terminate
   mxfSystemTerminate(server);
   mxfServerDisconnect(server);

   printf("\nPress enter to terminate\n");
   getchar();

return rc;
}