libgfamininet/demo/main.c

#include <stdio.h>
#include <string.h> // memset
#include <gfa/gfaserial.h>
#include <gfa/gfamininetmst.h>
#include "../src/dbghlp.h"

////////////////////////////////////////////////////////////////////////////////////

#define _DEVICE_NAME				"/dev/ttyO4"
#define _NODE_ADDR					0x11
#define _BAUD_RATE					19200
#define _DATA_BITS					8
#define _STOP_BITS					1
#define _PARITY						'N'

////////////////////////////////////////////////////////////////////////////////////

static int _BootloaderGetExecutionContext(HGFAMINEMST hMinem, uint8_t nNodeAddr)
{
	if(hMinem && !NODE_IS_MULTICAST(nNodeAddr))
	{
		uint8_t nIndex;
		ssize_t nRet, nLen;
		char txb[32], rxb[256];

	    nLen = GfaMininetMasterBuildFrame(hMinem, nNodeAddr, 0, "BU", 2, txb, sizeof(txb));

		if((nRet = GfaMininetMasterTransmitFrame(hMinem, txb, nLen)) != nLen)
			return -1;

		if((nLen = GfaMininetMasterReceiveFrame(hMinem, rxb, sizeof(rxb), true)) <= 0)
			return -1;

		nRet = GfaMininetMasterEvaluateSlaveResponse(hMinem, nNodeAddr, rxb, nLen, true, &nIndex);

		if(nRet == MINET_SLAVE_RESPONSE_SUCCESS)
			return -1; // Slave is neither a Bootloader nor an App
		if(nRet == MINET_SLAVE_RESPONSE_ACK)
			return 0; // Bootloader responding
		else if(nRet == MINET_SLAVE_RESPONSE_INDEX_IS_STATUS_CODE)
			return 1; // Application responding

		return -1;
	}

	return -1;
}

////////////////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////////////////

int main(void)
{
	int nRet = 0;

	////////////////////////////////////////////////////////////////////////////////

	GFA_MININET_MST_CFG_PARAMS mmcp;
	memset(&mmcp, 0, sizeof(mmcp));

	if(GfaSerialGetDeviceInterface(&mmcp.devcfg.itf))
	{
		HGFAMINEMST hMinem;
		GFA_SER_CFG_PARAMS scp;
		memset(&scp, 0, sizeof(scp));

		////////////////////////////////////////////////////////////////////////////
		// serial interface configuration

		scp.baud			= _BAUD_RATE;
		scp.data			= _DATA_BITS;
		scp.stop			= _STOP_BITS;
		scp.parity			= _PARITY;
		scp.bHandleTxEcho	= true;

		////////////////////////////////////////////////////////////////////////////
		// mininet master configuration

		mmcp.devcfg.pszDeviceName	= _DEVICE_NAME;
		mmcp.devcfg.pDevParams		= &scp;
		mmcp.devcfg.nSizeDevParams	= sizeof(scp);

		////////////////////////////////////////////////////////////////////////////
		//

		if((hMinem = GfaMininetMasterOpen(&mmcp)))
		{
			do
			{
				if((nRet = GfaMininetMasterSetVerbosity(hMinem, 4)) < 0) // enable output of frames
					break;
				if((nRet = GfaMininetMasterResetSlaveIndex(hMinem, _NODE_ADDR)) < 0)
					break;
				if((nRet = GfaMininetMasterPingSlave(hMinem, _NODE_ADDR)) < 0)
					break;

				nRet = _BootloaderGetExecutionContext(hMinem, _NODE_ADDR); // demonstrates the implementation of commands
			}
			while(0);

			GfaMininetMasterClose(hMinem);
		}
	}

    return nRet;
}