MM32G0001A 2个Timer各出1PWM 设置占空比不同实际结果确一样

只看该作者 · 2024-3-31 11:46

MM32G0001A 使用两个定时器 TIM14和TIM3
各出一路PWM
设置不一样的占空比
但是实际结果确一样
哪里设置有问题吗？
void TIM3_Configure(void)
{
GPIO_InitTypeDef       GPIO_InitStruct;
TIM_OCInitTypeDef    TIM_OCInitStruct;
TIM_TimeBaseInitTypeDef TIM_TimeBaseStruct;

/* Compute the value to be set in ARR regiter to generate signal frequency at 100 Khz */
uint32_t TimerPeriod = (TIM_GetTIMxClock(TIM3) / 5000 ) - 1;

/* Compute CCR1 value to generate a duty cycle at 80% for channel 1 */
uint32_t Channel1Pulse = ((uint32_t)800 * (TimerPeriod - 1)) / 1000;
RCC_APB1PeriphClockCmd(RCC_APB1ENR_TIM3, ENABLE);

TIM_TimeBaseStructInit(&TIM_TimeBaseStruct);
TIM_TimeBaseStruct.TIM_Prescaler       = 0;
TIM_TimeBaseStruct.TIM_CounterMode    = TIM_CounterMode_Up;
TIM_TimeBaseStruct.TIM_Period          = TimerPeriod;
TIM_TimeBaseStruct.TIM_ClockDivision    = TIM_CKD_Div1;
TIM_TimeBaseStruct.TIM_RepetitionCounter = 0;
TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStruct);

TIM_OCStructInit(&TIM_OCInitStruct);
TIM_OCInitStruct.TIM_OCMode    = TIM_OCMode_PWM1;
TIM_OCInitStruct.TIM_OutputState  = TIM_OutputState_Enable;
TIM_OCInitStruct.TIM_Pulse       = 0;
TIM_OCInitStruct.TIM_OCPolarity = TIM_OCPolarity_High;
TIM_OCInitStruct.TIM_OCIdleState  = TIM_OCIdleState_Set;

TIM_OCInitStruct.TIM_Pulse = Channel1Pulse;
TIM_OC1Init(TIM3, &TIM_OCInitStruct);

RCC_AHBPeriphClockCmd(RCC_AHBENR_GPIOA, ENABLE);

GPIO_PinAFConfig(GPIOA, GPIO_PinSource11, GPIO_AF_3);  /* TIM1_CH1  */

GPIO_StructInit(&GPIO_InitStruct);
GPIO_InitStruct.GPIO_Pin = GPIO_Pin_11;
GPIO_InitStruct.GPIO_Speed = GPIO_Speed_High;
GPIO_InitStruct.GPIO_Mode  = GPIO_Mode_AF_PP;
GPIO_Init(GPIOA, &GPIO_InitStruct);

TIM_Cmd(TIM3, ENABLE);

TIM_CtrlPWMOutputs(TIM3, ENABLE);
}

/***********************************************************************************************************************
  * @brief
  * @NOTE none
  * @param  none
  * @retval none
  *********************************************************************************************************************/
void TIM14_Configure(void)
{
GPIO_InitTypeDef       GPIO_InitStruct;
TIM_OCInitTypeDef    TIM_OCInitStruct;
TIM_TimeBaseInitTypeDef TIM_TimeBaseStruct;

/* Compute the value to be set in ARR regiter to generate signal frequency at 100 Khz */
uint32_t TimerPeriod = (TIM_GetTIMxClock(TIM14) / 5000 ) - 1;

/* Compute CCR1 value to generate a duty cycle at 80% for channel 1 */
uint32_t Channel1Pulse = ((uint32_t)500 * (TimerPeriod - 1)) / 1000;
RCC_APB1PeriphClockCmd(RCC_APB1ENR_TIM14, ENABLE);

TIM_TimeBaseStructInit(&TIM_TimeBaseStruct);
TIM_TimeBaseStruct.TIM_Prescaler       = 0;
TIM_TimeBaseStruct.TIM_CounterMode    = TIM_CounterMode_Up;
TIM_TimeBaseStruct.TIM_Period          = TimerPeriod;
TIM_TimeBaseStruct.TIM_ClockDivision    = TIM_CKD_Div1;
TIM_TimeBaseStruct.TIM_RepetitionCounter = 0;
TIM_TimeBaseInit(TIM14, &TIM_TimeBaseStruct);

TIM_OCStructInit(&TIM_OCInitStruct);
TIM_OCInitStruct.TIM_OCMode    = TIM_OCMode_PWM1;
TIM_OCInitStruct.TIM_OutputState  = TIM_OutputState_Enable;
TIM_OCInitStruct.TIM_Pulse       = 0;
TIM_OCInitStruct.TIM_OCPolarity = TIM_OCPolarity_High;
TIM_OCInitStruct.TIM_OCIdleState  = TIM_OCIdleState_Set;

TIM_OCInitStruct.TIM_Pulse = Channel1Pulse;
TIM_OC1Init(TIM14, &TIM_OCInitStruct);

RCC_AHBPeriphClockCmd(RCC_AHBENR_GPIOA, ENABLE);

GPIO_PinAFConfig(GPIOA, GPIO_PinSource9, GPIO_AF_3);  /* TIM1_CH1  */

GPIO_StructInit(&GPIO_InitStruct);
GPIO_InitStruct.GPIO_Pin = GPIO_Pin_9;
GPIO_InitStruct.GPIO_Speed = GPIO_Speed_High;
GPIO_InitStruct.GPIO_Mode  = GPIO_Mode_AF_PP;
GPIO_Init(GPIOA, &GPIO_InitStruct);

TIM_Cmd(TIM14, ENABLE);

TIM_CtrlPWMOutputs(TIM14, ENABLE);
}

只看该作者 · 2024-4-7 16:01

我在楼主的代码里没有找到设置TIMx_CR1寄存器的ARPE位(使能自动重装载的预装载寄存器)，见数据手册P182。不知道是不是这个原因。祝早日解决问题。

MM32G0001A 2个Timer各出1PWM 设置占空比不同 实际结果确一样

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