怎样利用STM32L476的TIM1输出脉冲？？

ZHANGXUEJIE

各位，我想用单独的TIM1通过PA7(TIM1_CH1N)输出指定个数的脉冲。参考了很多例程，网上的，还有STM32CUBE库自带的例程。都没有输出，只是CNT计数器可以计数。请大家指点指点。ST的技术支持也不是狠好。

ZHANGXUEJIE

版主，该上班了哦，有人找你

英尚微电子

灵动微电子的产品型号MM32L362PF 可以升级替换STM32L151C8T6,STM32L152C8T6,STM32L071RBT6，STM32L071RBT6，STM32L051,STM32L031,STM32L052 需要联系我 QQ3161422826 手机13751192923

huo_hu

不知道你是怎样输出的呀，是pwm模式还是比较模式，是软件计数还是用高级定时器的重复次数。

ZHANGXUEJIE

huo_hu 发表于 2018-9-4 00:47
不知道你是怎样输出的呀，是pwm模式还是比较模式，是软件计数还是用高级定时器的重复次数。

我上面说了的撒，用的TIM1_CH1N,肯定是高级计数器TIM1.其实就是实现这个功能[img]file:///C:\Users\qwkrom\AppData\Roaming\Tencent\Users\2430659177\QQ\WinTemp\RichOle\M`AP7){U[VJF}A{08V2$5IN.png[/img][img=0,1]file:///C:\Users\qwkrom\AppData\Roaming\Tencent\Users\2430659177\QQ\WinTemp\RichOle\M`AP7){U[VJF}A{08V2$5IN.png[/img][img=0,1]file:///C:\Users\qwkrom\AppData\Roaming\Tencent\Users\2430659177\QQ\WinTemp\RichOle\M`AP7){U[VJF}A{08V2$5IN.png[/img][img=0,1]file:///C:\Users\qwkrom\AppData\Roaming\Tencent\Users\2430659177\QQ\WinTemp\RichOle\M`AP7){U[VJF}A{08V2$5IN.png[/img]

file:///C:\Users\qwkrom\AppData\Roaming\Tencent\Users\2430659177\QQ\WinTemp\RichOle\0FJP$RJ4JFNRQP%0)({03%5.pngfile:///C:\Users\qwkrom\AppData\Roaming\Tencent\Users\2430659177\QQ\WinTemp\RichOle\0FJP$RJ4JFNRQP%0)({03%5.png

huo_hu

ZHANGXUEJIE 发表于 2018-9-4 13:59
我上面说了的撒，用的TIM1_CH1N,肯定是高级计数器TIM1.其实就是实现这个功能

最近刚好弄这个,cube生成的代码里几个地方要操作一下,一个是 TIM_OC_InitStruct.OCState 和 OCNState 要enable 还有一个是刹车控制,默认是使能所有通道是关闭的,LL_TIM_EnableAllOutputs(TIM1);这句可以开启,如果CNT不计数用LL_TIM_EnableCounter(TIM1); 开启

ZHANGXUEJIE

huo_hu 发表于 2018-9-6 12:22
最近刚好弄这个,cube生成的代码里几个地方要操作一下,一个是 TIM_OC_InitStruct.OCState 和 OCNState ...

CNT可以计数，就是没有脉冲输出。能否看看你的代码，只要有脉冲输出就可以。
/* Peripheral clock enable */
  RCC->APB2ENR |= RCC_APB2ENR_TIM1EN;

/* Configure the Time base :
   + Counter mode : UP Counter
   + Clock Division : 1
   + Period : 5000
   + Pulse : 2000
   + Prescaler : 7
   + Repetition counter : PULSE_NUMBER - 1
*/

/* Set the Timer prescaler to get 1MHz as counter clock */
Prescaler = (uint16_t) (SystemCoreClock / 1000000) - 1;

/* Select the up counter mode */
TIM1->CR1 &= ~(TIM_CR1_DIR | TIM_CR1_CMS);
TIM1->CR1 |= TIM_COUNTERMODE_UP;

/* Set the clock division to 1*/
TIM1->CR1 &= ~TIM_CR1_CKD;
TIM1->CR1 |= TIM_CLOCKDIVISION_DIV1;

/* Set the Autoreload value */
TIM1->ARR = PERIOD;

/* Set the Pulse value */
TIM1->CCR1 = PULSE;

/* Set the Prescaler value */
TIM1->PSC = Prescaler;

/* Set the Repetition counter value */
TIM1->RCR = PULSE_NUMBER - 1;

/* Generate an update event to reload the Prescaler and the repetition counter
  value immediately */
TIM1->EGR = TIM_EGR_UG;

/******** Configure the Internal Clock source *********************************/
/* Disable slave mode to clock the prescaler directly with the internal clock
if the TIM_SMCR is in the reset value, we can delete the following instruction*/
TIM1->SMCR =  RESET;

huo_hu

ZHANGXUEJIE 发表于 2018-9-6 14:15
CNT可以计数，就是没有脉冲输出。能否看看你的代码，只要有脉冲输出就可以。
/* Peripheral clock enabl ...

你io口没初始化，io时钟要打开，另外BDTR 的mod要置高

huo_hu

void MTIM8_Init(void) {
LL_TIM_InitTypeDef TIM_InitStruct;
LL_TIM_OC_InitTypeDef TIM_OC_InitStruct;
// LL_TIM_BDTR_InitTypeDef TIM_BDTRInitStruct;
LL_GPIO_InitTypeDef GPIO_InitStruct;
  /* Tim8 PC PA 时钟 */
  LL_APB2_GRP1_EnableClock(LL_APB2_GRP1_PERIPH_TIM8);
__HAL_RCC_GPIOC_CLK_ENABLE();
__HAL_RCC_GPIOA_CLK_ENABLE();

  /* TIM8 interrupt Init */
  NVIC_SetPriority(TIM8_UP_TIM13_IRQn, NVIC_EncodePriority(NVIC_GetPriorityGrouping(),0, 0));
  NVIC_EnableIRQ(TIM8_UP_TIM13_IRQn);

  TIM_InitStruct.Prescaler = 0;
  TIM_InitStruct.CounterMode = LL_TIM_COUNTERMODE_CENTER_UP;
  TIM_InitStruct.Autoreload = 16384-1;
  TIM_InitStruct.ClockDivision = LL_TIM_CLOCKDIVISION_DIV1;
  TIM_InitStruct.RepetitionCounter = 0;
  LL_TIM_Init(TIM8, &TIM_InitStruct);

  LL_TIM_SetClockSource(TIM8, LL_TIM_CLOCKSOURCE_INTERNAL);
/*
LL_TIM_OC_EnablePreload(TIM8, LL_TIM_CHANNEL_CH1);
LL_TIM_OC_EnablePreload(TIM8, LL_TIM_CHANNEL_CH2);
LL_TIM_OC_EnablePreload(TIM8, LL_TIM_CHANNEL_CH3);
LL_TIM_OC_EnablePreload(TIM8, LL_TIM_CHANNEL_CH4);*/
LL_TIM_EnableARRPreload(TIM8);

  TIM_OC_InitStruct.OCMode = LL_TIM_OCMODE_PWM1;
  TIM_OC_InitStruct.OCState = LL_TIM_OCSTATE_ENABLE;
  TIM_OC_InitStruct.OCNState = LL_TIM_OCSTATE_DISABLE;
  TIM_OC_InitStruct.CompareValue = 0;
  TIM_OC_InitStruct.OCPolarity = LL_TIM_OCPOLARITY_HIGH;
  TIM_OC_InitStruct.OCNPolarity = LL_TIM_OCPOLARITY_HIGH;
  TIM_OC_InitStruct.OCIdleState = LL_TIM_OCIDLESTATE_LOW;
  TIM_OC_InitStruct.OCNIdleState = LL_TIM_OCIDLESTATE_LOW;
LL_TIM_OC_Init(TIM8, LL_TIM_CHANNEL_CH1, &TIM_OC_InitStruct);
LL_TIM_OC_Init(TIM8, LL_TIM_CHANNEL_CH2, &TIM_OC_InitStruct);
LL_TIM_OC_Init(TIM8, LL_TIM_CHANNEL_CH3, &TIM_OC_InitStruct);
LL_TIM_OC_Init(TIM8, LL_TIM_CHANNEL_CH4, &TIM_OC_InitStruct);

LL_TIM_OC_EnableFast(TIM8, LL_TIM_CHANNEL_CH1);
LL_TIM_OC_EnableFast(TIM8, LL_TIM_CHANNEL_CH2);
LL_TIM_OC_EnableFast(TIM8, LL_TIM_CHANNEL_CH3);
LL_TIM_OC_EnableFast(TIM8, LL_TIM_CHANNEL_CH4);

  LL_TIM_SetTriggerOutput(TIM8, LL_TIM_TRGO_RESET);
  LL_TIM_DisableMasterSlaveMode(TIM8);

/**TIM8 GPIO Configuration
PC6    ------> TIM8_CH1
PC7    ------> TIM8_CH2
PC8    ------> TIM8_CH3
PC9    ------> TIM8_CH4
*/
  GPIO_InitStruct.Pin = LL_GPIO_PIN_6|LL_GPIO_PIN_7|LL_GPIO_PIN_8|LL_GPIO_PIN_9;
  GPIO_InitStruct.Mode = LL_GPIO_MODE_ALTERNATE;
  GPIO_InitStruct.Speed = LL_GPIO_SPEED_FREQ_VERY_HIGH;
  GPIO_InitStruct.OutputType = LL_GPIO_OUTPUT_PUSHPULL;//LL_GPIO_OUTPUT_OPENDRAIN;//
  GPIO_InitStruct.Pull = LL_GPIO_PULL_NO;
  GPIO_InitStruct.Alternate = LL_GPIO_AF_3;
  LL_GPIO_Init(GPIOC, &GPIO_InitStruct);
    LL_TIM_EnableAllOutputs(TIM8);
LL_TIM_EnableCounter(TIM8);

ZHANGXUEJIE

huo_hu 发表于 2018-9-7 12:43
你io口没初始化，io时钟要打开，另外BDTR 的mod要置高

IO口初始化了的，只是没有贴上来
void HAL_TIM_MspPostInit(TIM_HandleTypeDef* timHandle)
{

  GPIO_InitTypeDef GPIO_InitStruct;
  if(timHandle->Instance==TIM1)
  {
  /* USER CODE BEGIN TIM1_MspPostInit 0 */

  /* USER CODE END TIM1_MspPostInit 0 */

/**TIM1 GPIO Configuration
PA7    ------> TIM1_CH1N
*/
GPIO_InitStruct.Pin = clkk_Pin;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
GPIO_InitStruct.Alternate = GPIO_AF1_TIM1;
HAL_GPIO_Init(clkk_GPIO_Port, &GPIO_InitStruct);

  /* USER CODE BEGIN TIM1_MspPostInit 1 */

  /* USER CODE END TIM1_MspPostInit 1 */
  }

}