Channel Class

Accessing a physical MIL-1553 channel requires a handle to the channel.

A channel handle is a reference to a channel holding a physical resource (port), and is the first argument to be passed to many MXF channel oriented functions.

To get the handle to an MIL-1553 physical port, regardless of the installed devices, use the mxfModuleChannelGet() function by specifying the physical port index.

The mxfModuleChannelAllGet() function with the chnClass argument MXF_CLASS_MIL1553 can also be used.

If MXF_DEVICE_ALL is specified with mxfSystemDeviceAllGet() function, all handles of detected devices are returned.

HMXF_SERVER server=0;
HMXF_DEVICE devices[2];
HMXF_MODULE module;
HMXF_CHANNEL bm;
uint32 rc;
uint64 deviceCount;
uint64 moduleCount;
uint64 channelCount;
uint64 deviceIndex;
uint32 deviceType = MXF_DEVICE_ALL;           // All devices
uint32 moduleType = MXF_MODULE_MIL1553MRT_EH; // MIL-1553 enhanced module
uint32 chnClass   = MXF_CLASS_MIL1553;        // MIL-STD-1553 Channel
uint32 subClass   = MXF_SCLASS_BM_CHANNEL;    // Bus Monitor

   rc = mxfServerConnect("0.0.0.0", "", "", FALSE, &server);
   if(rc == MAXT_SUCCESS)
      rc = mxfSystemDeviceAllGet(server, deviceType, 2, &deviceCount, devices);
   for(deviceIndex=0; rc==MAXT_SUCCESS && deviceIndex<deviceCount; deviceIndex++)
   {
     rc = mxfDeviceModuleAllGet(devices[deviceIndex], moduleType, 1, &moduleCount, &module);
     if(rc == MAXT_SUCCESS && moduleCount != 0)
     {
        rc = mxfModuleChannelAllGet(module, chnClass, subClass, 1, &channelCount, &bm);
        if(rc == MAXT_SUCCESS && channelCount != 0)
        {
           break; // Found first BM channel
        }
     }
   }

To obtain the handle for a specific channel location on a specific device model, pass the device type constant to the device argument and physical location.

HMXF_SERVER server=0;
HMXF_DEVICE device=0;
HMXF_MODULE module=0;
HMXF_CHANNEL bc;
uint32 rc;
uint64 deviceCount=0;
uint64 deviceType   = MXF_DEVICE_FLEX1553_PCIE;  // Flex1553 device
uint64 moduleIndex  = 0;                         // First module
uint64 channelIndex = 2;              // First BC channel 

   rc = mxfServerConnect("0.0.0.0", "", "", FALSE, &server);
   if(rc == MAXT_SUCCESS)
      rc = mxfSystemDeviceAllGet(server, deviceType, 1, &deviceCount, &device);
   if(rc == MAXT_SUCCESS && deviceCount == 1)
   {
      rc = mxfDeviceModuleGet(device, moduleIndex, &module);
     if(rc == MAXT_SUCCESS)
       rc = mxfModuleChannelGet(module, channelIndex, &bc);
   }