flexadc_sampling.c

/*****************************************************************************
//
//     File:
//        flexadc_sampling.c
//
//       Copyright (c) MAX Technologies Inc. 1988-2022, All Rights Reserved.
//             CONFIDENTIAL AND PROPRIETARY INFORMATION WHICH IS THE 
//                         PROPERTY OF MAX TECHNOLOGIES INC. 
//
//      This example demonstrates the configuration of an FlexADC module and perform
//       sampling on 16 differential channels and 16 single-ended channels.
//
//       Hardware requirements:
//          - MAXT FlexMAX with FlexADC
//
*****************************************************************************/

#include "example.h"

#define MAX_ANALOG_CHN_NUM 40

int main(void)
{
uint32       rc;
HMXF_SERVER server;
HMXF_DEVICE device=0;
HMXF_MODULE module=0;
HMXF_CHANNEL rxChn[MAX_ANALOG_CHN_NUM];
HMXF_BUFFER rxBuffer;
MXF_FLEXANALOG_SAMPREC recANALOG;
int         iPort;
uint64      count=0;
uint64      byteCount;
uint64      timerStart=0, timer=0;
uint64 index;
float value;

   // Connect to services and initialize environment
   rc = mxfServerConnect("192.168.0.1", "admin", "admin", 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 40 Analog FlexADC channel
   if (!rc)
      rc = mxfChannelAllGet(server, MXF_CLASS_FLEXANALOG, MXF_SCLASS_RX_CHANNEL, MXF_MODULE_ALL, MAX_ANALOG_CHN_NUM, &count, rxChn);

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

   if (!rc)
      rc = mxfChannelInfoGet(rxChn[0], &device, &module);

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

   // Set the input range of the first 16 to +/-10V single-ended and the following 16 to 10V differential
   for(iPort=0; iPort<MAX_ANALOG_CHN_NUM && !rc; iPort++)
   {
      if(iPort < 16) // single-ended
      {
         rc = mxfAttributeUint64Set(rxChn[iPort], KMXF_FLEXADC_CHN_INPUT_RANGE, VMXF_FLEXADC_CHN_INPUT_RANGE_SE_BIPOLAR_10V);
      }
      else // differential
      {
         // In differential, only positive pin is used to set attribute
         if(!(iPort & 0x8))
            rc = mxfAttributeUint64Set(rxChn[iPort], KMXF_FLEXADC_CHN_INPUT_RANGE, VMXF_FLEXADC_CHN_INPUT_RANGE_DIFF_BIPOLAR_10V);
      }
   }

   // Set the conversion rate to 1 millisecond
   if(!rc)
      rc = mxfAttributeUint64Set(module, KMXF_FLEXADC_MODULE_CONVERSION_PERIOD, 1000);

   // Set the channel selection to 16 single-ended and 16 differential
   if(!rc)
      rc = mxfAttributeUint64Set(module, KMXF_FLEXADC_MODULE_CHN_SELECTION, 0x000000FF00FFFFFFULL);

   // Allocate RX sampling buffer
   if(!rc)
      rc = mxfRxSamplingBufferAlloc(module, sizeof(recANALOG), &rxBuffer, NULL);

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

   if(!rc)
      rc = mxfDeviceTimerGet(device, &timerStart);

   // Receive loop
   if(!rc)
   {
      do
      {
         iPort = 0;
         index = 0;
         mxfSleep(1000);
         rc = mxfFlexAnalogRxSamplingRead(rxBuffer, MXF_RXSAMPLING_FLAG_DEFAULT, sizeof(recANALOG), &count, &byteCount, &recANALOG);
         if(!rc)
         {
            do
            {
               if(recANALOG.dataMask & 0x1) // if channel is enabled converts ADC code to voltage
               {
                  rc = mxfFlexAdcDataConvert(rxChn[iPort], recANALOG.data[index], &value);
                  if(!rc)
                     printf("Value of ADC %d is %.3f. V\n\r", iPort, value);
                  index++;
               }
               recANALOG.dataMask >>= 1;
               iPort++;
            }while(!rc && recANALOG.dataMask);
         }
         if (!rc)
            rc = mxfDeviceTimerGet(device, &timer);
      }while(!rc && ((timer-timerStart) < 5000000));
   }

   //Stop acquisition
   if(!rc)
      rc = mxfRxSamplingStop(rxBuffer);
   
   if (!rc)
      rc = mxfRxSamplingBufferFree(rxBuffer);

   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;
}