C52-day05

/*
time:2023-05-23
PWM LED DC
*/
#include <reg52.h>
#include "Delay.h"
sbit LED=P1^0;
sbit st = P3^0;
sbit eoc = P3^1;
sbit oe = P3^2;
sbit RS = P3^3;
sbit RW = P3^4;
sbit E = P3^5;

unsigned int vol = 0;
unsigned char t[] = {"012346789"};
unsigned char str[] = {"VOLTAGE: "};
unsigned char i;
unsigned char PWM_COUNT; //计数
unsigned int HUXI_COUNT; //占空比更新时间
unsigned char PWM_VLAUE; //占空比比对值
bit direc_flag; //占空比更新方向



// 写数据
void writedate(unsigned int date)
{
    RS = 1;
    RW = 0;
    E = 0;
    P2 = date;
    Delay(5);
    E = 1;
    E = 0;
}


// 写命令
void writecom(unsigned char com)
{
    RS = 0;
    RW = 0;
    E = 0;
    P2 = com;
    Delay(5);     // 延时根据实际效果判断
    E = 1;
    E = 0;
}


// 初始化
void initlcd()
{
    writecom(0x38);
    writecom(0x0c);
    writecom(0x06);
    writecom(0x01);
}





void timer0_init()
{
	TMOD=0x02; //模式设置，00100000，定时器0，工作于模式2（M1=1，M0=0）
//定时器溢出值设置，每隔50ms发起一次中断。
	TH0=(65536-50000)/256;
	TL0=(65536-50000)%256;
	TR0=1; //定时器0开始计时
	ET0=1; //开定时器0中断
	EA=1; //开总中断
	PWM_COUNT =0;
}
void time0() interrupt 1
{
	PWM_COUNT++;
	HUXI_COUNT++;
	if(PWM_COUNT == PWM_VLAUE) //判断是否到了点亮LED的时候
		LED = 1; //点亮LED
	if(PWM_COUNT == 40) //当前周期结束
	{
		LED = 0; //熄灭LED
		PWM_COUNT = 0; //重新计时
	}
	if((HUXI_COUNT == 200) && (direc_flag == 0))
	{ //占空比增加10%
		HUXI_COUNT = 0;
		PWM_VLAUE++;
		if(PWM_VLAUE == 39) //占空比更改方向
		direc_flag = 1;
	}
	if((HUXI_COUNT == 200) && (direc_flag == 1))
	{ //占空比减少10%
		HUXI_COUNT = 0;
		PWM_VLAUE--;
		if(PWM_VLAUE == 1) //占空比更改方向
			direc_flag = 0;
	}
}


void adc()
{
    // 开启START
    st = 0;
    st = 1;
    Delay(5);
    st = 0;
    while (eoc != 1);
    oe = 1;
    vol = P0;
    oe = 0; 
}   

void display()
{
    unsigned char temp0 = 0, temp1 = 0, temp2 = 0;
    int i = 0;

    vol = vol * 100 / 51;
    temp0 = vol/100;
    temp1 = (vol%100)/10;
    temp2 = vol%10;

    writecom(0x80);
    Delay(5);
    for(i=0; i<8; i++)
    {
        writedate(str[i]);
        Delay(5);
    }
    writecom(0x80 + 0x40 + 4);
    Delay(5);
    writedate(t[temp0]);
    Delay(5);
    writedate('.');
    Delay(5);
    writedate(t[temp1]);
    Delay(5);
    writedate(t[temp2]);
    Delay(5);
    writedate('V');
    Delay(5); 
}




void main()
{
	HUXI_COUNT = 0;
	PWM_COUNT = 0;
	PWM_VLAUE = 20;
	direc_flag = 0;
	LED = 1; //默认LED熄灭
	timer0_init(); //定时器0初始化
	initlcd();

	while(1){

//		Delay(100);
//		LED=~LED;

		adc();
		display();

	}
}



//Delay.c


#include <intrins.h>
#include <reg52.h>
#include "Delay.h"
// 延迟1ms
void Delay(unsigned int n){
//@11.0592MHz
	unsigned char i, j;

//for(j=n;j>0;j--)
//for(i=112;i>0;i--);

	while(n--)
	{
		i = 2;
		j = 239;
		do
		{
			while (--j);
		} while (--i);
	}

}

//Delay.h
#ifndef __Delay_H__
#define __Delay_H__

void Delay(unsigned int times);


#endif