proteus PWM PID控制DCDC电源仿真程序51单片机

#include"reg52.h" #include"iic.h" #include"math.h" #include"intrins.h" //#define unsigend char uchar sbit pwm=P2^7; // 定义pwm脉冲 sbit P01=P0^1; // 定义pwm脉冲 sbit CS = P1^2; //使能。 sbit CLK = P1^3;//时钟 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占空比调节 float voltage_get=0; //获取电压值 float voltage_set=0; //设定电压值 这个地方就是你要设定的电压 修改这个值就可以获得想要的电压值 现在是36V float voltage_kp=0.01; //PID KP比例系数 float voltage_ki=0.1; //PID KI积分系数 float voltage_output=0; //PID输出 float voltage_error=0; //实际值与给定的误差 float voltage_error_last=0; //记录上次的误差 void timer_init(); unsigned char Get_ADC(bit ch); static void Delay_ms(unsigned int ms) { unsigned int i, j; for(i = 0; i < ms; i++) for(j = 0; j < 990; j++); } void main() { timer_init(); //初始化定时器 pwm=0; voltage_set=12; 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; // voltage_set=9; // Delay_ms(3); //PWM_control=20; } } //定时器0 用于产生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);//获取当前电压 //voltage_get=(Get_ADC(0));//获取当前电压 // voltage_get=17; //voltage_set= voltage_set*10; voltage_error=voltage_set-voltage_get;//当前差值=设置的减去获取的。 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; } //定时器初始化 具体的下面的代码已经配置好了 不用太关注 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; //启动AD转换 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_(); //从高位开始读 for(i = 0; i < 8; i++) { CLK = 1; _nop_(); _nop_(); CLK = 0; _nop_(); _nop_(); dat1 = (dat1 << 1)|DIO; } //从低位开始读 for(i = 0; i < 8; i++) { dat2 = dat2|((unsigned char)DIO<<i); CLK = 1; _nop_(); _nop_(); CLK = 0; _nop_(); _nop_(); } CS = 1; //返回读取结果 return dat1; }