fun.h

从零开始学51单片机源代码

#include "intrins.h"
#include <reg51.h>	//包含头文件
//定义端口寄存器	 
sfr P0M0 = 0X93;
sfr P0M1 = 0X94;
sfr P1M0 = 0X91;
sfr P1M1 = 0X92;
sfr P2M0 = 0X95;
sfr P2M1 = 0X96;  
sfr P3M0 = 0Xb1;
sfr P3M1 = 0Xb2; 

//定义ADC寄存器 
sfr P1ASF = 0X9D;
sfr ADC_CONTR = 0XBC;
sfr ADC_RES = 0XBD;
sfr ADC_RESL = 0XBE;

sfr AUXR1 = 0xa2;

#define fosc 11059200L
#define T0_50ms (65536 - (fosc/12/50000))  //50ms定时参数
sbit en1 = P2^6;
sbit en2 = P2^7;
unsigned int ad_result10; //10位ad转换结果 
float vin;//模拟电压值 
unsigned char display_num;
unsigned char shi, ge;	//定义十位、个位要输出的数据

/*
共阴极数码管0 - 9的字形码 
“0” 3FH “5” 6DH  
“1” 06H “6” 7DH
“2” 5BH “7” 07H
“3” 4FH “8” 7FH
“4” 66H “9” 6FH 
*/
const unsigned char seg7[10] = { 0x3f, 0x06, 0x5b, 0x4f, 0x66,
								 0x6d, 0x7d, 0x07, 0x7f, 0x6f};     

void init_port()
{
	P0M1 = 0xff;
	P0M0 = 0xff; 
	P2M1 |= 0xc0;  
	P2M0 |= 0xc0;
}

void init_adc()
{
	P1ASF = 0x01; //P1.0用作AD转换 
	ADC_RES = 0;
	ADC_RESL = 0;
	//ADC_POWER=1,SPEED1=0,SPEED0=0,ADC_FLAG=0,ADC_START=0,CHS2/CHS1/CHS0=000
	ADC_CONTR = 0X80;
	//等待4周期	  
	_nop_();	
	_nop_();
	_nop_();
	_nop_();
	//ADRJ = 0,ADC_RES寄存器保存10位A/D转换结果的高8位，ADC_RESL保存结果的低2位 
	 AUXR1 &= 0xfb;	
}
//定义延时函数	 
void ms_delay(unsigned int t)
{
	unsigned  int  i;
	for (t; t > 0; t--)	//外层循环t次	 
		for (i = 110;i > 0; i--)	//内层循环110次		   
		;
}

void display(unsigned char c2, unsigned char c1)
{
	P0 = seg7[c2];	//送入十位的段码 
	en2 = 0;	//显示DS2
	ms_delay(10);
	en2 = 1;	//关闭DS2	

	P0 = seg7[c1];	//送入个位的段码 
	en1 = 0;	//显示DS1
	ms_delay(10);
	en1 = 1;	//关闭DS1
}