/*---------------------------------------------------------------------------------------------------------------------------*/
/*--************************功能【AD转换,PWM电压控制,液晶显示】**************************--*/
/*--************************芯片:【STC12C5A60S2】******************************--*/
/*--************************液晶:【LCD1602】***********************************--*/
/*--************************ADC管脚:【P1.7 】***************************--*/
/*--************************检测范围:【0.00~12.5V】***************************--*/
/*---------------------------------------------------------------------------------------------------------------------------*/
#include "stc12c5a60s2.h"
#include "intrins.h"
#define uint unsigned int
#define uchar unsigned char
#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[] = {"Setvalue: V"}; //第一行显示框架
unsigned char pos_char_table[] = {" 9A.C0 "}; // 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
float show;
float NUM;
static uchar ldata=50; //作为显示的数据
sbit lcd_rs_port = P2^0; //定义LCD控制端口,根据硬件调整
sbit lcd_rw_port = P2^1;
sbit lcd_en_port = P2^2;
#define lcd_data_port P0
sbit key1 = P3^7; //定义按键1
sbit key2 = P3^6; //定义按键2
sbit key3 = P3^5; //定义按键3
sbit key4 = P3^4; //定义按键4
sbit key5 = P3^3; //定义按键5
sbit key6 = P3^2; //定义按键6
/************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);
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(uint i, uint Num); //显示数据处理
void LcdDisp(uint j, uint num); //液晶显示函数
void DelayMs(uchar ms);
void init_PWM();
void PWM1_change(uchar type,uchar change);
void PWM1_set(uchar empty);
/*-------------------------------- 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 = 0x80; //Set P1.7 as 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(uint i, uint Num)
{
int xx, yy, zz;
NUM = (Num * 4.68/ 1024.0); //计算公式:10-bit A/D Conversion Result = 1024 x (Vin / Vcc)
NUM =NUM *29.1/9.9;
xx = (int)NUM;
yy = (int)((NUM - (float)(xx)) * 10);
zz = (int)((NUM - (float)(xx)) * 100)%10;
/********************第一行数字*******************************/
pos_char_table[9]= data_char_table[i/100]; //输入值十位
pos_char_table[10]= data_char_table[i%100/10]; //输入值个位
pos_char_table[12]= data_char_table[i%10]; //输入值小数点后一位
/********************第二行数字*******************************/
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
}
//////////////////以下为LCD显示////////////////////
void LcdDisp(uint 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(固定文字)
}
Num_to_Disp(j, num);
for(i = 9; i < 14; i++)
{
lcd_char_write(i,0,pos_char_table[i]); //显示输入值
}
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++)
{;}
}
}
void DelayMs(uchar ms) //延时程序
{
uint i;
while(ms--)
{
for(i = 0; i < 850; i++);
}
}
void init_PWM()
{
CCON=0X00;
CH=0;
CL=0;
CMOD=0X02; //0X00:以系统时钟/12 为时钟源,0X02:系统时钟/2,0x08:系统时钟
PWM1_set(0X80);//起始占空比,0XC0:占空比为25%,0X80:占空比为50%,0X40:占空比为75%
CCAPM1=0X42; //0X42:8位PWM P1.4输出,无中断;0X53:8位PWM输出,下降沿产生中断;0X63:上升沿产生中断;0X73:跳变沿产生中断
CR=1; //计时器开始工作
}
void PWM1_set(uchar empty) //直接设置占空比
{
CCAP1L=empty;
CCAP1H=empty;
}
void PWM1_change(uchar type,uchar change) //type=0减占空比,1增加占空比 change: 0X0C约5%,0X05约2%
{
if(type==0)
{
CCAP1L+=change;
CCAP1H+=change;
}
else
{
CCAP1L-=change;
CCAP1H-=change;
}
}
void main(){
init_PWM(); //初始化,PWM输出
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) //按键增减PWM占空比
{
if(key1==0) //按键1按下
{
DelayMs(1); //按键消抖
while(key1==0); //按键释放才跳出执行下一步
ldata++; //显示数据加0.1
}
else if(key2==0) //按键2按下
{
DelayMs(1); //按键消抖
while(key2==0); //按键释放才跳出执行下一步
ldata--; //显示数据减0.1
}
else if(key3==0) //按键3按下
{
DelayMs(1); //按键消抖
while(key3==0); //按键释放才跳出执行下一步
ldata+=10; //显示数据加1
}
else if(key4==0) //按键4按下
{
DelayMs(1); //按键消抖
while(key4==0); //按键释放才跳出执行下一步
ldata-=10; //显示数据减1
}
else if(key5==0) //按键5按下
{
DelayMs(1); //按键消抖
while(key5==0); //按键释放才跳出执行下一步
ldata=0; //清0
}
LcdDisp(ldata,GetADCResult(7)); //液晶1602显示输入电压值和AD采集电压值(P1.7)
NUM=10*NUM;
show=ldata;
if((NUM<(show-0.1))||(NUM>(show+0.1)))
{
if(NUM<(show-0.1))
{
if((show-0.1)-NUM>1)
PWM1_change(1,0X05);
else
PWM1_change(1,0X01);
}
else
{
if(NUM-(show+0.1)>1)
PWM1_change(0,0X05);
else
PWM1_change(0,0X01);
}
Delay(500);
}
else
{Delay(2000);}
}
} |