stm8 开发例程一些基础外设-------------PWM

只看该作者 · 2019-2-28 20:35

/**************************************************************************
* 函数名：PWM_Init
* 描述  ：PWM初始化
* 输入  ：无
*
* 输出  ：无
* 返回  ：无
* 调用  ：外部调用
*************************************************************************/
void PWM_Init(void)
{
TIM2_PSCR =0x04;
/* Set the Autoreload value */
TIM2_ARRH = (uint8_t)(ARR >> 8);
TIM2_ARRL = (uint8_t)(ARR);
/*TIM2 Frequency=16M/16/(499+1)=2K*/
/* PWM1 Mode configuration: Channel1
TIM2 Channel1 duty cycle = [TIM2_CCR1/(TIM2_ARR + 1)] * 100 = 50%*/
  #if TIM2_Channel==TIM2_Channel1
/*TIM2 Frequency = TIM2 counter clock/(ARR + 1) */

TIM2_OC1Init(TIM2_OCMODE_PWM1, TIM2_OUTPUTSTATE_ENABLE,250, TIM2_OCPOLARITY_HIGH);

  #elif TIM2_Channel==TIM2_Channel2

TIM2_OC2Init(TIM2_OCMODE_PWM2, TIM2_OUTPUTSTATE_ENABLE,500, TIM2_OCPOLARITY_HIGH);

  #elif TIM2_Channel==TIM2_Channel3

TIM2_OC3Init(TIM2_OCMODE_PWM1, TIM2_OUTPUTSTATE_ENABLE,250, TIM2_OCPOLARITY_HIGH);

  #endif

  TIM2_CR1 |= (uint8_t)MASK_TIM2_CR1_CEN;

}

只看该作者 · 2019-2-28 20:36

/**************************************************************************
* 函数名：TIM2_OC1Init
* 描述  ：TIM2 第一通道PWM初始化
* 输入  ：TIM2_OCMode 常用参数TIM2_OCMODE_PWM1:0x60 ,TIM2_OCMODE_PWM2:0x70
         TIM2_OutputState  TIM2_OUTPUTSTATE_ENABLE:0x11
         TIM2_Pulse    占空比
         TIM2_OCPolarity  TIM2_OCPOLARITY_HIGH:0x00 ,TIM2_OCPOLARITY_LOW:0x22
*
* 输出  ：无
* 返回  ：无
* 调用  ：外部调用
*************************************************************************/
void TIM2_OC1Init(uint8_t TIM2_OCMode,uint8_t TIM2_OutputState,uint16_t TIM2_Pulse,uint8_t TIM2_OCPolarity )
{
   /* Disable the Channel 1: Reset the CCE Bit, Set the Output State , the Output Polarity */
TIM2_CCER1 &= (uint8_t)(~( MASK_TIM2_CCER1_CC1E | MASK_TIM2_CCER1_CC1P));
/* Set the Output State &  Set the Output Polarity  */
TIM2_CCER1 |= (uint8_t)((uint8_t)(TIM2_OutputState & MASK_TIM2_CCER1_CC1E ) |
                           (uint8_t)(TIM2_OCPolarity & MASK_TIM2_CCER1_CC1P));

/* Reset the Output Compare Bits  & Set the Ouput Compare Mode */
TIM2_CCMR1 = (uint8_t)((uint8_t)(TIM2_CCMR1 & (uint8_t)(~(uint8_t)MASK_TIM2_CCMR1_OC1M)) |
                        (uint8_t)TIM2_OCMode);
/* Set the Pulse value */
TIM2_CCR1H = (uint8_t)(TIM2_Pulse >> 8);
TIM2_CCR1L = (uint8_t)(TIM2_Pulse);
TIM2_CCMR1 |= (uint8_t)MASK_TIM2_CCMR1_OC1PE;
}

只看该作者 · 2019-2-28 20:37

/**************************************************************************
* 函数名：TIM2_OC2Init
* 描述  ：TIM2 第二通道PWM初始化
* 输入  ：TIM2_OCMode 常用参数TIM2_OCMODE_PWM1:0x60 ,TIM2_OCMODE_PWM2:0x70
         TIM2_OutputState  TIM2_OUTPUTSTATE_ENABLE:0x11
         TIM2_Pulse    占空比
         TIM2_OCPolarity  TIM2_OCPOLARITY_HIGH:0x00 ,TIM2_OCPOLARITY_LOW:0x22
*
* 输出  ：无
* 返回  ：无
* 调用  ：外部调用
*************************************************************************/
void TIM2_OC2Init(uint8_t TIM2_OCMode,uint8_t TIM2_OutputState,uint16_t TIM2_Pulse,uint8_t TIM2_OCPolarity )
{
   /* Disable the Channel 1: Reset the CCE Bit, Set the Output State , the Output Polarity */
TIM2_CCER1 &= (uint8_t)(~(MASK_TIM2_CCER1_CC2E | MASK_TIM2_CCER1_CC2P));
/* Set the Output State &  Set the Output Polarity  */
TIM2_CCER1 |= (uint8_t)((uint8_t)(TIM2_OutputState & MASK_TIM2_CCER1_CC2E ) |
                           (uint8_t)(TIM2_OCPolarity & MASK_TIM2_CCER1_CC2P));

/* Reset the Output Compare Bits  & Set the Ouput Compare Mode */
TIM2_CCMR2 = (uint8_t)((uint8_t)(TIM2_CCMR1 & (uint8_t)(~(uint8_t)MASK_TIM2_CCMR2_OC2M )) |
                        (uint8_t)TIM2_OCMode);
/* Set the Pulse value */
TIM2_CCR2H = (uint8_t)(TIM2_Pulse >> 8);
TIM2_CCR2L = (uint8_t)(TIM2_Pulse);
TIM2_CCMR2 |= (uint8_t)MASK_TIM2_CCMR2_OC2PE;
}

只看该作者 · 2019-2-28 22:10

/**************************************************************************
* 函数名：TIM2_OC3Init
* 描述  ：TIM2 第三通道PWM初始化
* 输入  ：TIM2_OCMode 常用参数TIM2_OCMODE_PWM1:0x60 ,TIM2_OCMODE_PWM2:0x70
         TIM2_OutputState  TIM2_OUTPUTSTATE_ENABLE:0x11
         TIM2_Pulse    占空比
         TIM2_OCPolarity  TIM2_OCPOLARITY_HIGH:0x00 ,TIM2_OCPOLARITY_LOW:0x22
*
* 输出  ：无
* 返回  ：无
* 调用  ：外部调用
*************************************************************************/
void TIM2_OC3Init(uint8_t TIM2_OCMode,uint8_t TIM2_OutputState,uint16_t TIM2_Pulse,uint8_t TIM2_OCPolarity )
{
   /* Disable the Channel 1: Reset the CCE Bit, Set the Output State , the Output Polarity */
TIM2_CCER2 &= (uint8_t)(~( MASK_TIM2_CCER2_CC3E | MASK_TIM2_CCER2_CC3P));
/* Set the Output State &  Set the Output Polarity  */
TIM2_CCER2 |= (uint8_t)((uint8_t)(TIM2_OutputState & MASK_TIM2_CCER2_CC3E ) |
                           (uint8_t)(TIM2_OCPolarity & MASK_TIM2_CCER2_CC3P));

/* Reset the Output Compare Bits  & Set the Ouput Compare Mode */
TIM2_CCMR3 = (uint8_t)((uint8_t)(TIM2_CCMR1 & (uint8_t)(~(uint8_t)MASK_TIM2_CCMR3_OC3M )) |
                        (uint8_t)TIM2_OCMode);
/* Set the Pulse value */
TIM2_CCR3H = (uint8_t)(TIM2_Pulse >> 8);
TIM2_CCR3L = (uint8_t)(TIM2_Pulse);
TIM2_CCMR3 |= (uint8_t)MASK_TIM2_CCMR3_OC3PE;
}

只看该作者 · 2019-2-28 22:10

void SetTIM2_PWM_Frequency(uint16_t TIM2_Period)
{
/* Set the Autoreload value */

TIM2_ARRH = (uint8_t)(TIM2_Period >> 8);
TIM2_ARRL = (uint8_t)(TIM2_Period);
}

只看该作者 · 2019-2-28 22:13

void SetTIM2_PWM_DutyCycle( uint16_t TIM2_Pulse)
{


  #if TIM2_Channel==TIM2_Channel1
/* Set the Pulse value */
TIM2_CCR1H = (uint8_t)(TIM2_Pulse >> 8);
TIM2_CCR1L = (uint8_t)(TIM2_Pulse);

  #elif TIM2_Channel==TIM2_Channel2
TIM2_CCR2H = (uint8_t)(TIM2_Pulse >> 8);
TIM2_CCR2L = (uint8_t)(TIM2_Pulse);

  #elif TIM2_Channel==TIM2_Channel3
TIM2_CCR3H = (uint8_t)(TIM2_Pulse >> 8);
TIM2_CCR3L = (uint8_t)(TIM2_Pulse);

  #endif
}