#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 = P2^4; //定义LCD控制端口,根据硬件调整
sbit lcd_rw_port = P2^3;
sbit lcd_en_port = P2^2;
#define lcd_data_port P0
void 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 register
sfr ADC_RESL = 0xBE; //ADC low 2-bit result register
sfr 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 = 2;
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 flag
ADC_CONTR &= ADC_FLAG; //Close ADC
return (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 port
ADC_RES = 0; //Clear previous result
ADC_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 =1.1* (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++)
{;}
}
}
这是我用的程序，不知道为什么，就是总会被拉高上去 |
