STM8如何在运行期间更改占空比

你好社区，
我尝试为我的实验编写代码，我有一个问题..我的代码应该改变占空比即。如果Convertion_Value_Current的值超过或低于特定值，则CCR2_V的值...因此我希望在示波器上看到一个变化的pwm，但它仍然具有与主要定义的相同的占空比（CCR2_V = 27）
这个想法是增加或减少寄存器的值，但它不起作用。你有什么想法可以解决问题吗？
谢谢
BG
＆amp; sharpinclude＆lt; stm8s.h＆gt;

＆amp; sharpinclude＆lt; stm8s_eval_lcd.h＆gt;
＆amp; sharpinclude＆lt; stdio.h＆gt;

uint8_t StrName [16] = {0};
uint16_t Conversion_Value = 0;
float Stufe = 0.00488;
float Nominal_Min = 3.500;
float Nominal_Max = 4.500;
float Conversion_Value_Current = 0;
uint16_t CCR2_Val = 27;
uint8_t a = 50;

// Parametrisierung des PI Reglers !!!! MUSS NOCH在matlab BESTIMMT WERDEN !!!! //
float kp = 0.001;
float tn = 0.04; int main（void）{
// Systemtakt

CLK_HSIPrescalerConfig（CLK_PRESCALER_HSIDIV1）;



// Erzeuge PWM
TIM3_DeInit（）;
TIM3_TimeBaseInit（TIM3_PRESCALER_1,45）;
TIM3_OC2Init（TIM3_OCMODE_PWM1，TIM3_OUTPUTSTATE_ENABLE，CCR2_Val，TIM3_OCPOLARITY_HIGH）;
TIM3_ARRPreloadConfig（ENABLE）;
TIM3_OC2PreloadConfig（ENABLE）;
TIM3_Cmd（ENABLE）;




// Initialisiere ADC和LCD
STM8S_EVAL_LCD_Init（）;
GPIO_DeInit（GPIOB）;
ADC2_DeInit（）;
GPIO_Init（GPIOB，GPIO_PIN_2，GPIO_MODE_IN_PU_NO_IT）;
ADC2_Init（ADC2_CONVERSIONMODE_CONTINUOUS，ADC2_CHANNEL_2，ADC2_PRESSEL_FCPU_D4，ADC2_EXTTRIG_TIM，DISABLE，ADC2_ALIGN_RIGHT，ADC2_SCHMITTTRIG_CHANNEL9，DISABLE）;
ADC2_Cmd（ENABLE）;

LCD_Clear（）;
LCD_BacklightCmd（ENABLE）;

ADC2_StartConversion（）; LCD_SetCursorPos（LCD_LINE1,0）;

LCD_Print（ 'Convers.Value .:'）;
LCD_Print（''）;


而（1）
{

而（！ADC2_GetFlagStatus（））{}

Conversion_Value = ADC2_GetConversionValue（）;

Conversion_Value_Current = Conversion_Value * Stufe;


// Regelung der DutyCyclef reinenerw nschtenAusgangsstrom

if（Conversion_Value_Current＆gt; Nominal_Max）
{

CCR2_Val--;

}
否则if（Conversion_Value_Current＆lt; Nominal_Min）
{

CCR2_Val ++;

}


TIM3_OC2Init（TIM3_OCMODE_PWM1，TIM3_OUTPUTSTATE_ENABLE，CCR2_Val，TIM3_OCPOLARITY_HIGH）;


sprintf（（char *）StrName，'％。3f'，（Conversion_Value * Stufe））;
LCD_SetCursorPos（LCD_LINE2,0）;
LCD_Print（则strName）;
ADC2_ClearFlag（）;
}

}
#stm8 / 128＃pwm-stm8＃stm8



以下为原文




Hello community,
i try to programm an code for my experimentation and i have a problem .. my code should change the duty cycle ie. the value of CCR2_V if the value of Convertion_Value_Current exceeds or is below a specific value .. as a result i want to see on the oscilloscope a changing pwm but it is still with the same duty cycle as defined in the main (CCR2_V=27)
the idea was to increment or decrement the value of the register, but it does not working. Have you any ideas where the problem can be?
Thanks
BG
&sharpinclude

&sharpinclude
&sharpinclude

uint8_t StrName[16]={0};
uint16_t Conversion_Value = 0;
float Stufe = 0.00488;
float Nominal_Min = 3.500;
float Nominal_Max = 4.500;
float Conversion_Value_Current  = 0;
uint16_t CCR2_Val = 27 ;
uint8_t a = 50;

// Parametrisierung des PI Reglers  !!!! MUSS NOCH IN MATLAB BESTIMMT WERDEN !!!! //
float kp = 0.001;
float tn = 0.04;int main(void){
  // Systemtakt

  CLK_HSIPrescalerConfig(CLK_PRESCALER_HSIDIV1);
   
   
  
  // Erzeuge PWM  
  TIM3_DeInit();  
  TIM3_TimeBaseInit(TIM3_PRESCALER_1, 45);
  TIM3_OC2Init(TIM3_OCMODE_PWM1, TIM3_OUTPUTSTATE_ENABLE,CCR2_Val, TIM3_OCPOLARITY_HIGH);  
  TIM3_ARRPreloadConfig(ENABLE);
  TIM3_OC2PreloadConfig(ENABLE);  
  TIM3_Cmd(ENABLE);
   
     

   
  // Initialisiere ADC und LCD
  STM8S_EVAL_LCD_Init();     
  GPIO_DeInit(GPIOB);
  ADC2_DeInit();
  GPIO_Init(GPIOB, GPIO_PIN_2, GPIO_MODE_IN_PU_NO_IT);
  ADC2_Init(ADC2_CONVERSIONMODE_CONTINUOUS, ADC2_CHANNEL_2, ADC2_PRESSEL_FCPU_D4, ADC2_EXTTRIG_TIM, DISABLE , ADC2_ALIGN_RIGHT, ADC2_SCHMITTTRIG_CHANNEL9, DISABLE);  
  ADC2_Cmd(ENABLE);
   
  LCD_Clear();
  LCD_BacklightCmd(ENABLE);
   
  ADC2_StartConversion();  LCD_SetCursorPos(LCD_LINE1, 0);

  LCD_Print('Convers.Value.:');
  LCD_Print('                ');
        
   
  while(1)
   {
      
    while(!ADC2_GetFlagStatus()){}
     
    Conversion_Value = ADC2_GetConversionValue();
     
    Conversion_Value_Current = Conversion_Value*Stufe;
   
     
    //Regelung der Duty Cycle f�r einen erw�nschten Ausgangsstrom
     
    if(Conversion_Value_Current > Nominal_Max)
    {
      
      CCR2_Val--;
         
    }
    else if (Conversion_Value_Current < Nominal_Min)
    {
      
     CCR2_Val++;
         
    }

   
    TIM3_OC2Init(TIM3_OCMODE_PWM1, TIM3_OUTPUTSTATE_ENABLE,CCR2_Val, TIM3_OCPOLARITY_HIGH);
   
         
    sprintf((char*)StrName, '%.3f    ', (Conversion_Value*Stufe));
    LCD_SetCursorPos(LCD_LINE2, 0);
    LCD_Print(StrName);
    ADC2_ClearFlag();   
   }
   
}  
#stm8/128 #pwm-stm8 #stm8

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