STC12C5A60S2自带10位AD测量电压值LCD1602显示(C程序)

/*---------------------------------------------------------------------------------------------------------------------------*/ /*--************************功能【AD转换，液晶显示】**************************--*/ /*--************************芯片：【STC12C5A60S2】******************************--*/ /*--************************液晶：【LCD1602】***********************************--*/ /*--************************ADC管脚：【P1.0～P1.7 】***************************--*/ /*--************************检测范围：【0.00～4.99V】***************************--*/ /*---------------------------------------------------------------------------------------------------------------------------*/ #include "reg52.h"#include "intrins.h"typedef unsigned char uchar;typedef unsigned int uint;#define _Nop() _nop_()/*------------------------以下为LCD1602显示模块定义-----------------------*/unsigned char data_char_table[]= {"0123456789ABCDEF"};//LCD数据unsigned char Lcd_Dis1_table[] = {"Position:No. "};//第一行显示框架unsigned char pos_char_table[] = {" D "};// 显示位置unsigned char Lcd_Dis2_table[] = {"Voltage : V"};//第二行显示框架unsigned char num_char_table[] = {" 9A.CD V"};// 显示位置sbit lcd_rs_port = P2^7; //定义LCD控制端口,根据硬件调整sbit lcd_rw_port = P2^6;sbit lcd_en_port = P2^4;#define lcd_data_port P0void lcd_delay(uchar ms);//LCD1602 延时void lcd_busy_wait(); //LCD1602 忙等待void lcd_command_write(uint command); //LCD1602 命令字写入void lcd_system_reset();//LCD1602 初始化void lcd_char_write(uint x_pos,y_pos,lcd_dat); //LCD1602 字符写入void lcd_bad_check(); //LCD1602 坏点检查void Num_to_Disp(uchar i, uint Num);//显示数据处理void LcdDisp(uchar j, uint num);//液晶显示函数/*------------------------以下为ADC相应寄存器初始化及端口定义-------------*//***** 定义与ADC相关的特殊功能寄存器*****/sfr ADC_CONTR = 0xBC; //ADC控制寄存器sfr ADC_RES = 0xBD; //ADC hight 8-bit result registersfr ADC_RESL = 0xBE; //ADC low 2-bit result registersfr P1ASF = 0x9D; //P1口功能控制寄存器P1ASF/************定义相应操作位***************/#define ADC_POWER 0x80 //ADC电源控制位，0：关闭，1：打开#define ADC_FLAG 0x10 //ADC结束标志位#define ADC_START 0x08 //ADC启动控制位#define ADC_SPEEDLL 0x00 //540 clocks___________选择转换速度/*------------------------以下为相关函数声明------------------------------*/void InitADC();//ADC初始化uint GetADCResult(uchar ch);void Delay(uint n); //延时程序void delay_1ms(uchar x);/*--------------------------------主函数--------------------------------*/void main(){uchar i;lcd_system_reset(); //LCD1602 初始化lcd_bad_check(); //LCD1602 坏点检查InitADC(); //初始化ADC特殊功能寄存器while (1){i = 0;while(i < 7){LcdDisp(i, GetADCResult(i)); //液晶1602显示输入电压值（P1.0 - P1.7）Delay(1000);i++;}}}/*-------------------------------- ADC 取值------------------------------*/uint GetADCResult(uchar ch){ADC_CONTR = ADC_POWER | ADC_SPEEDLL | ch | ADC_START;_nop_(); //Must wait before inquiry_nop_();_nop_();_nop_();while (!(ADC_CONTR & ADC_FLAG)); //Wait complete flagADC_CONTR &= ADC_FLAG; //Close ADCreturn (ADC_RES*4 + ADC_RESL); //Return ADC result}/*----------------------------初始化ADC特殊功能寄存器-------------------*/void InitADC( ){P1ASF = P1 | 0x3f; //Set P1.0 - P1.5 as analog input portADC_RES = 0; //Clear previous resultADC_RESL = 0;ADC_CONTR = ADC_POWER | ADC_SPEEDLL ;Delay(20); //ADC power-on delay and Start A/D conversion }/*---------------------------- LCD1602相应函数---------------------------*////////////////以下为LCD显示数据处理/////////////////void Num_to_Disp(uchar i, uint Num){float NUM;int xx, yy, zz;NUM = (Num * 5/ 1024.0);//计算公式：10-bit A/D Conversion Result = 1024 x (Vin / Vcc) xx = (int)NUM;yy = (int)((NUM - (float)(xx)) * 10);zz = (int)((NUM - (float)(xx)) * 100)%10;num_char_table[9] = data_char_table[xx / 10];//电压值十位num_char_table[10]= data_char_table[xx % 10];//电压值个位num_char_table[12]= data_char_table[yy];//电压值小数点后一位num_char_table[13]= data_char_table[zz];//电压值小数点后两位?pos_char_table[13]= data_char_table[i];//当前ADC接口}//////////////////以下为LCD显示////////////////////void LcdDisp(uchar j, uint num){uint i=0;for (i=0;i<16;i++){lcd_char_write(i,0,Lcd_Dis1_table[i]);lcd_char_write(i,1,Lcd_Dis2_table[i]); //显示框架}Num_to_Disp(j, num);lcd_char_write(13,0,pos_char_table[13]);for(i = 9; i < 14; i++){lcd_char_write(i,1,num_char_table[i]); //显示电压}delay_1ms(100);}//////////////以下是LCD1602驱动程序////////////////void lcd_delay(uchar ms) /*LCD1602 延时*/{uchar j;while(ms--){for(j=0;j<250;j++){;}}}void lcd_busy_wait() /*LCD1602 忙等待*/{lcd_rs_port = 0;lcd_rw_port = 1;lcd_en_port = 1;lcd_data_port = 0xff;while (lcd_data_port&0x80);lcd_en_port = 0;}void lcd_command_write(uint command) /*LCD1602 命令字写入*/ {lcd_busy_wait();lcd_rs_port = 0;lcd_rw_port = 0;lcd_en_port = 0;lcd_data_port = command;lcd_en_port = 1;lcd_en_port = 0;}void lcd_system_reset() /*LCD1602 初始化*/{lcd_delay(20);lcd_command_write(0x38);lcd_delay(100);lcd_command_write(0x38);lcd_delay(50);lcd_command_write(0x38);lcd_delay(10);lcd_command_write(0x08);lcd_command_write(0x01);lcd_command_write(0x06);lcd_command_write(0x0c);}void lcd_char_write(uint x_pos,y_pos,lcd_dat) /*LCD1602 字符写入*/ {x_pos &= 0x0f; /* X位置范围0~15 */y_pos &= 0x01; /* Y位置范围0~ 1 */if(y_pos==1) x_pos += 0x40;x_pos += 0x80;lcd_command_write(x_pos);lcd_busy_wait();lcd_rs_port = 1;lcd_rw_port = 0;lcd_en_port = 0;lcd_data_port = lcd_dat;lcd_en_port = 1;lcd_en_port = 0;}void lcd_bad_check() /*LCD1602 坏点检查*/{char i,j;for(i=0;i<2;i++){for(j=0;j<16;j++) {lcd_char_write(j,i,0xff);}}lcd_delay(200);lcd_delay(200);lcd_delay(200);lcd_delay(100);lcd_delay(200);lcd_command_write(0x01); /* clear lcd disp */}//////////////////以上是LCD1602驱动程序/////////////////*-----------------------------延时程序---------------------------*/ void Delay(uint n){uint x;while (n--){x = 500;while (x--);}}/*1MS为单位的延时程序*/void delay_1ms(uchar x){uchar j;while(x--){for(j=0;j<125;j++){;}}}。