discrete.c

/******************************************************************************
//
//    File:
//       discrete.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 how to read discrete input and to write to
//      discrete output using direct access.
//
//       Hardware requirements:
//          - MAXT Flex.
//
 *******************************************************************************/

#include "example.h"

#define LOCAL

int main(void)
{
uint32 rc;
uint64 deviceCount;
uint64 moduleCount;
uint64 channelCount;
HMXF_SERVER server;
HMXF_DEVICE device=0;
HMXF_MODULE module=0;
HMXF_CHANNEL rx=0;
HMXF_CHANNEL tx=0;
uint64 i;
uint64 state;
char     errorString[200];

   // Connect 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

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

   // Get handle of discrete input channel
   if(!rc)
      rc = mxfSystemDeviceAllGet(server, MXF_DEVICE_ALL, 1, &deviceCount, &device);

   if(!rc)
      rc = mxfDeviceModuleAllGet(device, MXF_MODULE_DIOFIFO_EH, 1, &moduleCount, &module);

   if(!rc)
      rc = mxfModuleChannelAllGet(module, MXF_CLASS_DISCRETE, MXF_SCLASS_RX_CHANNEL, 1, &channelCount, &rx);

   // Get handle of discrete output channel
   if(!rc)
      rc = mxfModuleChannelAllGet(module, MXF_CLASS_DISCRETE, MXF_SCLASS_TX_CHANNEL, 1, &channelCount, &tx);

   // Read value of input pin #1 and set it to output pin #2 for about 10 seconds
   for(i=0; i < 10000 && !rc; i++)
   {
      rc = mxfDiscreteChannelRead(rx, 0x02, &state);
      state<<=1; // to be aligned with mask 0x04
      if(!rc)
         rc = mxfDiscreteChannelWrite(tx, 0x04, state);
      mxfSleep(1);
   }

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

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

   // Unload MX Foundation library
   mxfSystemTerminate(server);

   mxfServerDisconnect(server);

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

   return rc;
}