readall_mcu.c

#include <stdio.h>
#include <unistd.h>
#include <time.h>
#include <wiringSerial.h>

#define UART_NODE	"/dev/ttyS0"

enum KEY_TYPE {
	SHORT_PRESS = 1,
	MIDDLE_PRESS = 2,
	LONG_PRESS = 3,
} KEY_TYPE;

int checkData(char *buf, int messageLength)
{
	int isDataValid = 0;
	int checksum = buf[messageLength];
	int calculation = 0;
	for (int i = 0; i < messageLength; i++) {
		calculation += buf[i];
	}

	isDataValid = (calculation == checksum);
	return isDataValid;
}

void combineAck(char *ackMessage, char *payload, int messageLength)
{
	ackMessage[0] = 0xA5;
	ackMessage[1] = 0x5A;
	ackMessage[2] = messageLength;
	for (int i = 0; i < messageLength; i++) {
		ackMessage[3 + i] = payload[i];
	}
	ackMessage[4 + messageLength] = 0;
	for (int j = 0; j < 4 + messageLength; j++) {
		ackMessage[4 + messageLength] += ackMessage[j];
	}
}

int main(int argc, char **argv)
{
	int fd;
	int charpos, payload_len;
	char recvBuf[64];
	char sendBuf[64];
	char payLoad[32];
	char gchar = 0;
	int mVoltage;
	int mChargeStatus;
	// enum KEY_TYPE mKeyType;
	int mKeyType;

	time_t now;
	if (argc != 2) {
		printf("Usage: sudo ./readall_mcu /dev/ttyS0\n");
		return -1;
	}
	if ((fd = serialOpen(argv[1], 115200)) < 0) {
		printf("open serial error\n");
	}
	while (1) {
		int recv_count = serialDataAvail(fd);
		//int recv_count = read(fd, recvBuf, 64);
		if (recv_count > 0) {
			for (int i = 0; i < recv_count; i++) {
//              time(&now); 
				gchar = serialGetchar(fd);
				printf("%02x ", gchar);
				if (0x5A == gchar) {
					charpos = 1;
				} else if (0xA5 == gchar && charpos == 1) {
					printf("\n[IPC] ");
					charpos = 2;
				} else if (charpos == 2) {
					if (0x01 == gchar) {
						printf("[KEY] ");
					} else if (0x02 == gchar) {
						printf("[BAT] ");
					} else if (0x03 == gchar) {
						printf("[CHG] ");
					} else if (0x04 == gchar) {
						printf("[VER] ");
					} else if (0x05 == gchar) {
						printf("[CUT] ");
					} else {
						printf("[UNKNOWN] ");
					}
					charpos = 3;
				} else if (charpos == 3) {
					payload_len = gchar;
					charpos = 4;
				} else if (charpos == 4) {
					payload_len =
					    (gchar << 8) + payload_len;
					printf("[LEN %d] ", payload_len);
					charpos = 5;
				} else if (charpos == 5) {
					payload_len--;
					printf("[%d] ", payload_len);
					if (payload_len == 0)
						charpos = 6;
				} else if (charpos == 6) {
					printf("[SUM]\n");
					charpos = 0;
				}
			}
			serialFlush(fd);
		}
	}

	serialClose(fd);
	return 0;
}