stc15f2pid控制温度

好的，您可以通过以下步骤实现stc15f2基于PID控制算法的温度控制：

1. 在stc15f2上编写程序，通过AD转换模块获取温度数据，并将其转换为数字信号。

2. 根据设定的目标温度和实际温度计算出温度偏差，并根据PID控制算法计算出控制量。

3. 通过PWM模块控制电热丝的加热功率。

下面是一个简单的示例程序：

#include <STC15F2K60S2.h>
#include <intrins.h>

#define FOSC 24000000L
#define BAUD 115200L
#define DIV  (FOSC/BAUD/32/12)

#define PWM_MAX 1000

unsigned char sdata[2];
unsigned char rcvdata;

unsigned int target_temp = 50; // 目标温度
unsigned int kp = 5;           // 比例系数
unsigned int ki = 1;           // 积分系数
unsigned int kd = 1;           // 微分系数

unsigned int last_error = 0;
unsigned int integral = 0;

void InitUART() {
    SCON  = 0x50;
    TMOD &= 0x0F;
    TMOD |= 0x20;
    TH1   = 0xFD;
    TL1   = 0xFD;
    TR1   = 1;
    ES    = 1;
    EA    = 1;
}

void InitADC() {
    P1M1 |= 0x01;
    P1M0 |= 0x01;
    ADC_CONTR = 0x80;
}

void InitPWM() {
    P_SW2 |= 0x40;
    PWMCKS = 0x04;
    PWMCFG |= 0x80;
    PWMCR  |= 0x80;
    PWMCR  |= 0x40;
    PWMCR  |= 0x20;
    PWMCR  |= 0x10;
    PWMCR  |= 0x08;
    PWMCR  |= 0x04;
    PWMCR  |= 0x02;
    PWMCR  |= 0x01;
    PWM0P = 0;
    PWM0C = 0;
    PWM0T = PWM_MAX;
    PWM0D = 0;
    PWM0EN = 1;
}

void SendData(unsigned char dat) {
    SBUF = dat;
    while(!TI);
    TI = 0;
}

unsigned int GetTemp() {
    unsigned int temp;
    ADC_CONTR = 0x90;
    _nop_();
    _nop_();
    _nop_();
    _nop_();
    temp = ADC_RES;
    temp = temp * 330 / 1024;
    return temp;
}

unsigned int PIDControl(unsigned int temp) {
    unsigned int error = target_temp - temp;
    unsigned int derivative = error - last_error;
    integral += error;
    if(integral > PWM_MAX) integral = PWM_MAX;
    if(integral < 0) integral = 0;
    unsigned int control = kp * error + ki * integral + kd * derivative;
    last_error = error;
    return control;
}

void main() {
    InitUART();
    InitADC();
    InitPWM();
    while(1) {
        unsigned int temp = GetTemp();
        unsigned int control = PIDControl(temp);
        PWM0D = control;
        _nop_();
        _nop_();
        _nop_();
        _nop_();
    }
}

void UART_Isr() interrupt 4 using 1 {
    if(RI) {
        rcvdata = SBUF;
        RI = 0;
    }
}

这个示例程序仅供参考，实际应用中需要根据具体的需求进行修改和调整。需要注意的是，PID控制算法需要根据实际情况进行调整，以达到最佳的控制效果。