A/D转换-编程知识

硬件电路模型

模数转换代码

main.c

#include <REGX52.H>
#include "LCD1602.h"
#include "Delay.h"
#include "XPT2046.h"unsigned int ADValue;
int main(){LCD_Init();LCD_ShowString(1,1,"ADJ NTC RG");while(1){ADValue = XPT2046_ReadAD(XPT2046_XP_8);LCD_ShowNum(2,1,ADValue,3);ADValue = XPT2046_ReadAD(XPT2046_YP_8);LCD_ShowNum(2,5,ADValue,3);ADValue = XPT2046_ReadAD(XPT2046_VBAT_8);LCD_ShowNum(2,9,ADValue,3);Delay(10);}
}

延时函数c语言文件

延时函数头文件

LCD1602C语言文件

#include <REGX52.H>
#include <stdlib.h>
#include <stdio.h>//引脚配置：
sbit LCD_RS=P3^5;
sbit LCD_RW=P3^6;
sbit LCD_EN=P3^4;
#define LCD_DataPort P0//函数定义：
/*** @brief  LCD1602延时函数，12MHz调用可延时1ms* @param  无* @retval 无*/void LCD_Delay(){unsigned char i, j;i = 2;j = 239;do{while (--j);} while (--i);}/*** @brief  LCD1602写命令* @param  Command 要写入的命令* @retval 无*/void LCD_WriteCommand(unsigned char Command){LCD_RS=0;LCD_RW=0;LCD_DataPort=Command;LCD_EN=1;LCD_Delay();LCD_EN=0;LCD_Delay();}/*** @brief  LCD1602写数据* @param  Data 要写入的数据* @retval 无*/void LCD_WriteData(unsigned char Data){LCD_RS=1;LCD_RW=0;LCD_DataPort=Data;LCD_EN=1;LCD_Delay();LCD_EN=0;LCD_Delay();}/*** @brief  LCD1602设置光标位置* @param  Line 行位置，范围：1~2* @param  Column 列位置，范围：1~16* @retval 无*/void LCD_SetCursor(unsigned char Line,unsigned char Column){if(Line==1){LCD_WriteCommand(0x80|(Column-1));}else if(Line==2){LCD_WriteCommand(0x80|(Column-1+0x40));}}/*** @brief  LCD1602初始化函数* @param  无* @retval 无*/void LCD_Init(){LCD_WriteCommand(0x38);//八位数据接口，两行显示，5*7点阵LCD_WriteCommand(0x0c);//显示开，光标关，闪烁关LCD_WriteCommand(0x06);//数据读写操作后，光标自动加一，画面不动LCD_WriteCommand(0x01);//光标复位，清屏}/*** @brief  在LCD1602指定位置上显示一个字符* @param  Line 行位置，范围：1~2* @param  Column 列位置，范围：1~16* @param  Char 要显示的字符* @retval 无*/void LCD_ShowChar(unsigned char Line,unsigned char Column,char Char){LCD_SetCursor(Line,Column);LCD_WriteData(Char);}/*** @brief  在LCD1602指定位置开始显示所给字符串* @param  Line 起始行位置，范围：1~2* @param  Column 起始列位置，范围：1~16* @param  String 要显示的字符串* @retval 无*/void LCD_ShowString(unsigned char Line,unsigned char Column,char *String){unsigned char i;LCD_SetCursor(Line,Column);for(i=0;String[i]!='\0';i++){LCD_WriteData(String[i]);}}/*** @brief  返回值=X的Y次方*/int LCD_Pow(int X,int Y){unsigned char i;int Result=1;for(i=0;i<Y;i++){Result*=X;}return Result;}/*** @brief  在LCD1602指定位置开始显示所给数字* @param  Line 起始行位置，范围：1~2* @param  Column 起始列位置，范围：1~16* @param  Number 要显示的数字，范围：0~65535* @param  Length 要显示数字的长度，范围：1~5* @retval 无*/void LCD_ShowNum(unsigned char Line,unsigned char Column,unsigned int Number,unsigned char Length){unsigned char i;LCD_SetCursor(Line,Column);for(i=Length;i>0;i--){LCD_WriteData(Number/LCD_Pow(10,i-1)%10+'0');}}/*** @brief  在LCD1602指定位置开始以有符号十进制显示所给数字* @param  Line 起始行位置，范围：1~2* @param  Column 起始列位置，范围：1~16* @param  Number 要显示的数字，范围：-32768~32767* @param  Length 要显示数字的长度，范围：1~5* @retval 无*/void LCD_ShowSignedNum(unsigned char Line,unsigned char Column,int Number,unsigned char Length){unsigned char i;unsigned int Number1;LCD_SetCursor(Line,Column);if(Number>=0){LCD_WriteData('+');Number1=Number;}else{LCD_WriteData('-');Number1=-Number;}for(i=Length;i>0;i--){LCD_WriteData(Number1/LCD_Pow(10,i-1)%10+'0');}}/*** @brief  在LCD1602指定位置开始以十六进制显示所给数字* @param  Line 起始行位置，范围：1~2* @param  Column 起始列位置，范围：1~16* @param  Number 要显示的数字，范围：0~0xFFFF* @param  Length 要显示数字的长度，范围：1~4* @retval 无*/void LCD_ShowHexNum(unsigned char Line,unsigned char Column,unsigned int Number,unsigned char Length){unsigned char i,SingleNumber;LCD_SetCursor(Line,Column);for(i=Length;i>0;i--){SingleNumber=Number/LCD_Pow(16,i-1)%16;if(SingleNumber<10){LCD_WriteData(SingleNumber+'0');}else{LCD_WriteData(SingleNumber-10+'A');}}}/*** @brief  在LCD1602指定位置开始以二进制显示所给数字* @param  Line 起始行位置，范围：1~2* @param  Column 起始列位置，范围：1~16* @param  Number 要显示的数字，范围：0~1111 1111 1111 1111* @param  Length 要显示数字的长度，范围：1~16* @retval 无*/void LCD_ShowBinNum(unsigned char Line,unsigned char Column,unsigned int Number,unsigned char Length){unsigned char i;LCD_SetCursor(Line,Column);for(i=Length;i>0;i--){LCD_WriteData(Number/LCD_Pow(2,i-1)%2+'0');}}

LCD1602头文件

  * #ifndef __LCD1602_H__#define __LCD1602_H__//用户调用函数：void LCD_Init();void LCD_ShowChar(unsigned char Line,unsigned char Column,char Char);void LCD_ShowString(unsigned char Line,unsigned char Column,char *String);void LCD_ShowNum(unsigned char Line,unsigned char Column,unsigned int Number,unsigned char Length);void LCD_ShowSignedNum(unsigned char Line,unsigned char Column,int Number,unsigned char Length);void LCD_ShowHexNum(unsigned char Line,unsigned char Column,unsigned int Number,unsigned char Length);void LCD_ShowBinNum(unsigned char Line,unsigned char Column,unsigned int Number,unsigned char Length);#endif

XPT2406c语言文件

#include <REGX52.H>
sbit XPT2046_CS = P3^7;
sbit XPT2046_DCLK = P2^1;
sbit XPT2046_DIN = P2^2;
sbit XPT2046_DOUT = P2^5;unsigned int XPT2046_ReadAD(unsigned char Command){unsigned char i;unsigned int ADValue;XPT2046_DCLK = 0;XPT2046_CS = 0;for(i = 0; i<8; i++){XPT2046_DIN = Command&(0x80>>i);XPT2046_DCLK = 1;XPT2046_DCLK = 0;}for(i = 0; i<16;i++){XPT2046_DCLK = 1;XPT2046_DCLK = 0;if(XPT2046_DOUT){ADValue|=(0x8000>>i);}}XPT2046_CS = 1;if(Command&0x08){return ADValue>>8;}else{return ADValue>>4;}}

XPT2406头文件

#ifndef _XPT2046__H__
#define _XPT2046__H__#define XPT2046_XP_8 0x9C
#define XPT2046_YP_8 0xDC
#define XPT2046_YP_8 0xDC
#define XPT2046_VBAT_8 0xAC
#define XPT2046_VUX_8  0xEC#define XPT2046_XP_12 0x94
#define XPT2046_YP_12 0xD4
#define XPT2046_YP_12 0xD4
#define XPT2046_VBAT_12 0xA4
#define XPT2046_VUX_12  0xE4unsigned int XPT2046_ReadAD(unsigned char Command);#endif