csu3_am335x/EVSE/Projects/DS60-120/Apps/lcmComm_dgus.c

/*
 * lcmComm_dgus.c
 *
 * Created on : 2020-10-20
 * Update on : 2022-03-01
 * Author : Folus Wen, Eason Yang
 * Version : V0.27
 *
 */

#include 	"lcmComm_dgus.h"

//#define isDebugPrint

//=======================================
// Basic routine
//=======================================
void displayMessageDgus(uint8_t *data, uint16_t len, uint8_t isRX)
{
	uint8_t output[8192];

	memset(output, 0x00, ARRAY_SIZE(output));
	sprintf((char*)output, "%s", (isRX?"RX: ":"TX: "));
	for(uint16_t idx = 0;idx<len;idx++)
	{
		sprintf((char*)output, "%s%02x ", output, data[idx]);
	}

	//printf("%s\n", output);
}

//=======================================
// Call function (Transmit message into LCD)
//=======================================
int transceiverDgus(int32_t fd, uint8_t *tx, uint16_t tx_len, uint8_t *rx, uint16_t rx_len)
{
	int result = FAIL;
	int len;

	tcflush(fd,TCIOFLUSH);

	displayMessageDgus(tx, tx_len, NO);

	if(write(fd, tx, tx_len) >= ARRAY_SIZE(tx))
	{
		usleep(100);
		len = read(fd, rx, rx_len);
		if(len > 0)
		{
			if((rx[0] == CMD_ACK_VALUE_1) && (rx[1] == CMD_ACK_VALUE_2))
			{
				displayMessageDgus(rx, len, YES);
				result = PASS;
			}
		}
	}
	else
	{}

	return result;
}

//=======================================
// Call function (Write register value function)
//=======================================
int8_t lcdRegisterWrite(int32_t fd, uint16_t address, uint8_t *data, uint8_t dataLen)
{
	int8_t result = FAIL;
	uint8_t tx[5 + dataLen];
	uint8_t rx[128];

	memset(tx, 0x00, sizeof(tx));
	memset(rx, 0x00, sizeof(rx));

	tx[0] = CMD_HEADER_1;
	tx[1] = CMD_HEADER_2;
	tx[2] = (2 + dataLen);
	tx[3] = CMD_REG_WRITE;
	tx[4] = (address & 0xff);

	memcpy(&tx[5], data, dataLen);

	if(fd > 0)
	{
		if(transceiverDgus(fd, tx, ARRAY_SIZE(tx), rx, ARRAY_SIZE(rx)) == PASS)
		{
			result = PASS;
		}
		else
		{}
	}
	else
	{}

	return result;
}