stm32f103 TIM2 PWM没有输出？

winamp123 提问时间：2020-8-16 12:05 /

问答
是否解决:

以前用TIM8输出2路PWM正常，现在改为TIM2却没有输出，对照datasheet寄存器详细查了遍，没看出问题。先贴出了主要代码，哪位能看看有什么问题？非常感谢。

static bool PWM_Init(void)
{
TimHandle2.Instance    = TIM2;
TimHandle2.Init.Prescaler       = (uint32_t)(SystemCoreClock / 16000000) - 1;
TimHandle2.Init.Period          = 5000;
TimHandle2.Init.ClockDivision    = 0;
TimHandle2.Init.CounterMode    = TIM_COUNTERMODE_UP;
TimHandle2.Init.RepetitionCounter = 0;
if (HAL_TIM_PWM_Init(&TimHandle2) != HAL_OK)
return false;

// Configure PWM duty cycle
for (int i = 2; i < 4; i++)
{
sConfig.Pulse       = PWM_GetRealOutput(0);
sConfig.OCMode    = TIM_OCMODE_PWM1;
sConfig.OCPolarity = TIM_OCPOLARITY_HIGH;
sConfig.OCNPolarity  = TIM_OCNPOLARITY_HIGH;
sConfig.OCFastMode = TIM_OCFAST_DISABLE;
sConfig.OCIdleState  = TIM_OCIDLESTATE_RESET;
sConfig.OCNIdleState = TIM_OCNIDLESTATE_RESET;

uint32_t address = PWM_GetChannelAddress(i);
if (address == -1)
return false;

if (HAL_TIM_PWM_ConfigChannel(&TimHandle2, &sConfig, address) != HAL_OK)
return false;

if (HAL_TIM_PWM_Start(&TimHandle2, address) != HAL_OK)
return false;
}
}

void HAL_TIM_PWM_MspInit(TIM_HandleTypeDef *htim)
{
GPIO_InitTypeDef  GPIO_InitStruct;

if (htim == &TimHandle2)
{
__HAL_RCC_SYSCFG_CLK_ENABLE();
__HAL_RCC_AFIO_CLK_ENABLE();
__HAL_RCC_TIM2_CLK_ENABLE();
      __GPIOB_CLK_ENABLE();

      GPIO_InitStruct.Pin    = GPIO_PIN_10 | GPIO_PIN_11;
      GPIO_InitStruct.Mode    = GPIO_MODE_AF_PP;
      GPIO_InitStruct.Speed    = GPIO_SPEED_HIGH;
      HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
}
}

bool MOTOR_SetValue(uint8_t ao, float value)
{
uint32_t pulse = PWM_GetRealOutput(value);

if (ao == 0)
TimHandle2.Instance->CCR1 = pulse;
else if (ao == 1)
TimHandle2.Instance->CCR2 = pulse;
else if (ao == 2)
TimHandle2.Instance->CCR3 = pulse;
else if (ao == 3)
TimHandle2.Instance->CCR4 = pulse;
else
return false;

return true;
}