control.c

采用C51语言完成基于74HC595的串口键盘与LED指示灯单元设计

#include <reg51.h>
#include "commons.h"

sbit _p32 = P3^2;
sbit _p16 = P1^6;
sbit _p17 = P1^7;




//A/D转换的函数
unsigned int ad();						   //定义AD转换函数

void ctr_routine(void) {				   //控制函数
	char led_buf[6];	
	//A/D转换
	unsigned int value = ad();


	if (_menu_status == MENU_OFF) {		   //若菜单检测处于关闭阶段，则：
		led_buf[0] = '^';				   //第一字符改为测量标志符
		to_string(&led_buf[1], 5, value);  //将AD转换值组装到显示字符串中
		print(led_buf);					   //打印现实字符串
	}
}

/*
unsigned int ad() {
	unsigned int result = 0;
	unsigned char i = 0;
	p16 = 0;
	while(p32 == 0);
	for ( ; i < 12 ; i++) {
		p17 = 1;
		delay();
		p17 = 0;
		result <<= 1;
		result |= p32;
	}
	p17 = 1;
	delay();
	p17 = 0;
	p16 = 1;
	return result;
}*/