dac.c

/*****************************************************************************
//
//     File:
//        dac.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
//       basic transmission on one single-ended channel.
//
//       Hardware requirements:
//          - MAXT 500 series carrier with IPM-DAC (jumpers must be set for +/- 10V operation).
//
*****************************************************************************/

#include "example.h"

int main(void)
{
uint32       rc;
HMXF_SERVER server;
HMXF_MODULE module=0;
HMXF_CHANNEL txChn=0;
HMXF_BUFFER txBuffer;
MXF_ANALOG_DATAREC recANALOG;

   // 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 first Analog IPM-DAC channel
   if (!rc)
      rc = mxfChannelGet(server, MXF_CLASS_ANALOG, MXF_SCLASS_TX_CHANNEL, MXF_MODULE_ALL, 0, &txChn);

   if (!rc)
      rc = mxfChannelInfoGet(txChn, 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);

   if(!rc)
   {
      // Allocate TX aperiodic buffer
      rc = mxfTxAperiodicBufferAlloc(txChn, MXF_TXAPERIODIC_PRIORITY_NORMAL, sizeof(recANALOG), &txBuffer, NULL);
      if(!rc)
      {
         recANALOG.timeTag = 0;
         recANALOG.control = 0;
         recANALOG.repeatCount = 1;
         recANALOG.reserved = 0;
         recANALOG.data.value = 2.5;
         rc = mxfAnalogTxAperiodicWrite(txBuffer, MXF_TXAPERIODIC_FLAG_DEFAULT, 0, 1, &recANALOG);
      }
   }

   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;
}