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#include"reg52.h"
#include"iic.h"
#include"math.h"
#include"intrins.h"
//#define unsigend char uchar
sbit pwm=P2^7; // 定義pwm脈沖
sbit CS = P1^2; //使能。
sbit CLK = P1^3;//時鐘
sbit DIO = P1^4;
sbit button1=P3^0;
sbit button2=P3^1;
sbit button3=P3^2;
sbit button4=P3^3;
sbit button5=P3^4;
int pwm_add=0; //pwm增量
int PWM_control=0; //pwm占空比調節
float voltage_get=0; //獲取電壓值
float voltage_set=0; //設定電壓值這個地方就是你要設定的電壓修改這個值就可以獲得想要的電壓值現在是36V
float voltage_kp=0.01; //PID KP比例系數
float voltage_ki=0.1; //PID KI積分系數
float voltage_output=0; //PID輸出
float voltage_error=0; //實際值與給定的誤差
float voltage_error_last=0; //記錄上次的誤差
void timer_init();
unsigned char Get_ADC(bit ch);
void main()
{
timer_init(); //初始化定時器
while(1)
{
if(!button1) voltage_set=0;
else if(!button2) voltage_set=3;
else if(!button3) voltage_set=6;
else if(!button4) voltage_set=9;
else if(!button5) voltage_set=12;
}
}
//定時器0 用于產生PWM波
void timer_irq() interrupt 1
{
pwm_add++;
if (pwm_add==PWM_control) {pwm=0;}
else if (pwm_add>=50) {pwm=1;pwm_add=0;}
}
void timer1_irq() interrupt 3
{
TH1=(65536-50000)>>8;
TL1= 65536-50000;
voltage_get=(Get_ADC(0)/10.2);
// voltage_get=17;
voltage_error=voltage_set-voltage_get;
voltage_output+=voltage_kp*(voltage_error-voltage_error_last)
+voltage_ki*voltage_error;
voltage_error_last=voltage_error;
if (voltage_output>49) voltage_output=49;
else if(voltage_output<1) voltage_output=1;
PWM_control=(int)voltage_output;
}
//定時器初始化具體的下面的代碼已經配置好了不用太關注
void timer_init()
{
TMOD=0X12;
TH0=TL0=256-200;
TH1=(65536-50000)>>8;
TL1= 65536-50000;
EA=1;ET0=1;ET1=1;TR0=1;TR1=1;
}
unsigned char Get_ADC(bit ch)
{
unsigned char i,dat1 = 0,dat2 = 0;
//啟動AD轉換
CS = 0; CLK = 0;
DIO = 1; _nop_(); _nop_();
CLK = 1; _nop_(); _nop_();
CLK = 0; DIO = 1; _nop_(); _nop_();
CLK = 1; _nop_(); _nop_();
CLK = 0; DIO = ch; _nop_(); _nop_();
CLK = 1; _nop_(); _nop_();
CLK = 0; DIO = 1; _nop_(); _nop_();
//從高位開始讀
for(i = 0; i < 8; i++)
{
CLK = 1; _nop_(); _nop_();
CLK = 0; _nop_(); _nop_();
dat1 = (dat1 << 1)|DIO;
}
//從低位開始讀
for(i = 0; i < 8; i++)
{
dat2 = dat2|((unsigned char)DIO<<i);
CLK = 1; _nop_(); _nop_();
CLK = 0; _nop_(); _nop_();
}
CS = 1;
//返回讀取結果
return dat1;
}

復制代碼

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