IPC@CHIP Documentation - SC12 @CHIP-RTOS V1.10

Generic example using TCP/IP memory pool receive buffer:
int huge myDevReceive1(DevUserIfaceHandle ifaceHandle,
unsigned char far * far * dataPtr,
int far * dataLength,
DevUserBufferHandle bufferHandle)
{
int errorCode;
unsigned int rcvdLength;
unsigned char far *tcp_buffer ;
}
// Hardware specific: Check how many incoming data bytes are available.
rcvdLength = .....; // =byte count
// Get a buffer from TCP/IP by calling API service 0xA5 and save at dataPtr
Dev_Get_Buffer(bufferHandle, dataPtr, rcvdLength); // C-Lib call
tcp_buffer = *dataPtr ; // Check if memory allocation successful
if (tcp_buffer != (unsigned char far *)0)
{
// Hardware specific: Move received data from device to tcp_buffer
// Do not wait (sleep) here for indefinite times,
// to avoid blocking of other function calls.
*dataLength = recvdLength; // Report number of bytes now in tcp_buffer
return 0; // success
}
else
{
return -1; // out of memory
}
// Generic example for using your own receive buffer:
int huge myDevReceive2(DevUserIfaceHandle ifaceHandle,
unsigned char far * far * dataPtr,
int far * dataLength,
DevUserBufferHandle bufferHandle)
{
// Save the pointer to the beginning of the data
*dataPtr = myBuffer; // myBuffer somehow allocated by the user
}
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// Hardware specific: Read data from your device and store in myBuffer
// Save the length (in bytes) of received data
*dataLength = deviceDataLength;
// IMPORTANT: Null out the bufferhandle pointer
*bufferHandle = (DevUserBuffer)0;
return 0;
DEV_GET_BUF API - Dev_Get_Buffer's implementation
DevUserIfaceHandle type definition
Device FreeReceive function
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