AD模数转换

main.c

#include <REGX52.H>
#include "Delay.h"
#include "LCD1602.h"
#include "XPT2046.h"unsigned int ADValue;void main(void)
{LCD_Init();LCD_ShowString(1,1,"ADJ  NTC  GR");while(1){ADValue=XPT2046_ReadAD(XPT2046_XP);		//读取AIN0，可调电阻LCD_ShowNum(2,1,ADValue,3);				//显示AIN0ADValue=XPT2046_ReadAD(XPT2046_YP);		//读取AIN1，热敏电阻LCD_ShowNum(2,6,ADValue,3);				//显示AIN1ADValue=XPT2046_ReadAD(XPT2046_VBAT);	//读取AIN2，光敏电阻LCD_ShowNum(2,11,ADValue,3);			//显示AIN2Delay(100);}
}

XPT2046.c

#include <REGX52.H>
#include <INTRINS.H>//引脚定义
sbit XPY2046_DIN=P3^4;
sbit XPY2046_CS=P3^5;
sbit XPY2046_DCLK=P3^6;
sbit XPY2046_DOUT=P3^7;/*** @brief  ZPT2046读取AD值* @param  Command 命令字，范围：头文件内定义的宏，结尾的数字表示转换的位数* @retval AD转换后的数字量，范围：8位为0~255，12位为0~4095*/
unsigned int XPT2046_ReadAD(unsigned char Command)
{unsigned char i;unsigned int Data=0;XPY2046_DCLK=0;XPY2046_CS=0;for(i=0;i<8;i++){XPY2046_DIN=Command&(0x80>>i);XPY2046_DCLK=1;XPY2046_DCLK=0;}for(i=0;i<16;i++){XPY2046_DCLK=1;XPY2046_DCLK=0;if(XPY2046_DOUT){Data|=(0x8000>>i);}}XPY2046_CS=1;return Data>>8;
}

XPT2046.h

#ifndef __XPT2046_H__
#define __XPT2046_H__#define XPT2046_VBAT	0xAC
#define XPT2046_AUX		0xEC
#define XPT2046_XP		0x9C	//0xBC
#define XPT2046_YP		0xDCunsigned int XPT2046_ReadAD(unsigned char Command);#endif

DA数模转换

main.c

#include <REGX52.H>
#include "Delay.h"
#include "Timer0.h"sbit DA=P2^1;unsigned char Counter,Compare;	//计数值和比较值，用于输出PWM
unsigned char i;void main()
{Timer0_Init();while(1){for(i=0;i<100;i++){Compare=i;			//设置比较值，改变PWM占空比Delay(10);}for(i=100;i>0;i--){Compare=i;			//设置比较值，改变PWM占空比Delay(10);}}
}void Timer0_Routine() interrupt 1
{TL0 = 0x9C;		//设置定时初值TH0 = 0xFF;		//设置定时初值Counter++;Counter%=100;	//计数值变化范围限制在0~99if(Counter<Compare)	//计数值小于比较值{DA=1;		//输出1}else				//计数值大于比较值{DA=0;		//输出0}
}

Timer0.c

#include <REGX52.H>/*** @brief  定时器0初始化，100us@12.000MHz* @param  无* @retval 无*/
void Timer0_Init(void)
{TMOD &= 0xF0;		//设置定时器模式TMOD |= 0x01;		//设置定时器模式TL0 = 0x9C;		//设置定时初值TH0 = 0xFF;		//设置定时初值TF0 = 0;		//清除TF0标志TR0 = 1;		//定时器0开始计时ET0=1;EA=1;PT0=0;
}/*定时器中断函数模板
void Timer0_Routine() interrupt 1
{static unsigned int T0Count;TL0 = 0x9C;		//设置定时初值TH0 = 0xFF;		//设置定时初值T0Count++;if(T0Count>=1000){T0Count=0;}
}
*/

Timer0.h

#ifndef __TIMER0_H__
#define __TIMER0_H__void Timer0_Init(void);#endif