HomeEnergyMeter/STM32/Core/Src/cmdRx.c

#include "uart.h"
#include "stdio.h"
#include "main.h"

#define MAX_LEN 100

void handleCmdRx() {

	static int mode = -1;
	static unsigned char str[MAX_LEN];
	static unsigned char *valP;
	static int reset = 1;

    if( reset == 1 ) {
            valP = str;
            mode = 0;
            reset = 0;
    }

	while( serialAvailable() ) {

		const unsigned char c = serialRead();

		if(  !(c>='0' && c<='9') &&
			 !(c>='a' && c<='z') &&
			 !(c>='A' && c<='Z') &&
			 c!='\"' && c!=',' && c!='.' && c!='{' && c!='}') {
			reset = 1;
		}
		else {
			if( mode == 0 && c=='{' ) {
				*(valP)++ = c;
				mode = 1;
			}
			else if( mode == 1 && c=='}' ) {
				*(valP)++ = c;
				*(valP)++ = '\0';
				int val=-1;
				const int no = sscanf((const char *)str,"{%d}",&val);
				if( no == 1 ) {
					HAL_GPIO_WritePin(GPIOC, GPIO_PIN_13, (val==1)?GPIO_PIN_RESET:GPIO_PIN_SET);
				}
				reset=1;
			}
			else if( mode==1 ){
				*(valP)++ = c;
			}
		}
	}
}