relay.c

自己设计的pic单片机开发板源程序和说明书（内有原理图）支持pic16系列28脚和40脚器件。串口输出信息。4个LED数码管驱动；4个LED驱动；4个按键驱动；1个RS232接口；1个RS485接口；

void Test_relay()
{
int8 i;
	while(TRUE)
	{
	puts("Please select a number of the function\n");
	puts("1          relay1 on\n");
	puts("2          relay1 off\n");
	puts("3          relay2 on\n");
	puts("4          relay2 off\n");
	puts("ESC to return\n");
	while(!kbhit());
	i = getc();
	switch(i)
	{
		case 1:
			output_low(relay1);
			puts("relay1 is open\n");
			break;
		case 2:
			output_high(relay1);
			puts("relay1 is shut\n");
			break;
		case 3:
			output_low(relay2);	
			puts("relay2 is open\n");
			break;
		case 4:
			output_high(relay2);
			puts("relay2 is open\n");
			break;
		case ESC_KEY:
			output_high(relay1);
			output_high(relay2);
			return;
			break;
		default:
			break;
	}
	}
}