在 STM32F0 上使用 TIM1 进行 PWM 时出错

Question

我试图尽可能地隔离它（通过注释掉工作的 TIM3 代码以进行比较）。我已经让 PWM 在 TIM3 上正常工作，但在 TIM1 上没有看到任何东西。最初，该问题是在某些 TIM_OCInitStructure 的评论中指出的。电话，但我把它们都放在那儿了，但仍然没有看到任何信号。有没有人看到代码中还缺少其他内容？

void TIM_TIMER_Init(void)
{
    TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;

//  RCC_APB1PeriphClockCmd(RCC_APB1ENR_TIM3EN, ENABLE);   //timer 3
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1, ENABLE);   //timer 1
    TIM_TimeBaseStructure.TIM_Prescaler = 0;
    TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;  
    TIM_TimeBaseStructure.TIM_Period = 4799;  // PER = F_timer / F_pwm - 1
    TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1;
    TIM_TimeBaseStructure.TIM_RepetitionCounter = 0;

    // Initialize TIMx
//  TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure);
    TIM_TimeBaseInit(TIM1, &TIM_TimeBaseStructure);

    // Start count on TIMx
//  TIM_Cmd(TIM3, ENABLE);
    TIM_Cmd(TIM1, ENABLE);
}

void TIM_PWM_Init(void)
{
    TIM_OCInitTypeDef   TIM_OCInitStructure;

    TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM2;   // PWM1/PWM2 = set/clear on compare match
    TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
    TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_Low;
    TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Disable;
    TIM_OCInitStructure.TIM_OCNIdleState = TIM_OCNIdleState_Reset;
    TIM_OCInitStructure.TIM_OCNPolarity = TIM_OCNPolarity_Low;
    TIM_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Reset;

    TIM_OCInitStructure.TIM_Pulse = 959;    // 20% Duty Cycle on ch. 1
//  TIM_OC1Init(TIM3, &TIM_OCInitStructure);
//  TIM_OC1PreloadConfig(TIM3, TIM_OCPreload_Enable);
    TIM_OC1Init(TIM1, &TIM_OCInitStructure);
    TIM_OC1PreloadConfig(TIM1, TIM_OCPreload_Enable);
/*
    TIM_OCInitStructure.TIM_Pulse = 1919;   // 40% Duty Cycle on ch. 2
//  TIM_OC2Init(TIM3, &TIM_OCInitStructure);
//  TIM_OC2PreloadConfig(TIM3, TIM_OCPreload_Enable);
    TIM_OC2Init(TIM1, &TIM_OCInitStructure);
    TIM_OC2PreloadConfig(TIM1, TIM_OCPreload_Enable);

    TIM_OCInitStructure.TIM_Pulse = 2879;   // 60% Duty Cycle on ch. 3
//  TIM_OC3Init(TIM3, &TIM_OCInitStructure);
//  TIM_OC3PreloadConfig(TIM3, TIM_OCPreload_Enable);
    TIM_OC3Init(TIM1, &TIM_OCInitStructure);
    TIM_OC3PreloadConfig(TIM1, TIM_OCPreload_Enable);

    TIM_OCInitStructure.TIM_Pulse = 3839;   // 80% Duty Cycle on ch. 4
//  TIM_OC4Init(TIM3, &TIM_OCInitStructure);
//  TIM_OC4PreloadConfig(TIM3, TIM_OCPreload_Enable);
    TIM_OC4Init(TIM1, &TIM_OCInitStructure);
    TIM_OC4PreloadConfig(TIM1, TIM_OCPreload_Enable);
*/}

//"using convenience methods instead of CMSIS"
void TIM_PINS_Init(void)
{
    GPIO_InitTypeDef    GPIO_InitStructure;

//  RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOC, ENABLE);  //enabling port C
    RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA, ENABLE);  //enabling port A 

    // Alternative Functions for pins
//  GPIO_PinAFConfig(GPIOC, GPIO_PinSource6, GPIO_AF_0);  // PC6
//  GPIO_PinAFConfig(GPIOC, GPIO_PinSource7, GPIO_AF_0);  // PC7
//  GPIO_PinAFConfig(GPIOC, GPIO_PinSource8, GPIO_AF_0);  // PC8
//  GPIO_PinAFConfig(GPIOC, GPIO_PinSource9, GPIO_AF_0);  // PC9

    GPIO_PinAFConfig(GPIOA, GPIO_PinSource8, GPIO_AF_2);    // PA8
    GPIO_PinAFConfig(GPIOA, GPIO_PinSource9, GPIO_AF_2);    // PA9
    GPIO_PinAFConfig(GPIOA, GPIO_PinSource10, GPIO_AF_2);   // PA10
    GPIO_PinAFConfig(GPIOA, GPIO_PinSource11, GPIO_AF_2);   // PA11

    // Set pins
//  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6 | GPIO_Pin_7 | GPIO_Pin_8 | GPIO_Pin_9;
    GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
    GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;


GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;

//  GPIO_Init(GPIOC, &GPIO_InitStructure);  

    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8 | GPIO_Pin_9 | GPIO_Pin_10 | GPIO_Pin_11;
    GPIO_Init(GPIOA, &GPIO_InitStructure);
}

///////////////// 原始问题 //////////////////

有人看到这段代码有问题吗？

TIM_OCInitTypeDef   TIM_OCInitStructure;

    TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM2;
    TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
    TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_Low;

    TIM_OCInitStructure.TIM_Pulse = 959;    // 20% Duty Cycle on ch. 1
    TIM_OC1Init(TIM3, &TIM_OCInitStructure);
    TIM_OC1PreloadConfig(TIM3, TIM_OCPreload_Enable);
    TIM_OC1Init(TIM1, &TIM_OCInitStructure);
    TIM_OC1PreloadConfig(TIM1, TIM_OCPreload_Enable);

问题出在

TIM_OC1Init(TIM1, &TIM_OCInitStructure);

错误是

assert_param() 失败：文件“../system/src/stm32f0-stdperiph/stm32f0xx_tim.c”，第 811 行。查找该行是：

  if((TIMx == TIM1) || (TIMx == TIM15) || (TIMx == TIM16) || (TIMx == TIM17))
  {
    assert_param(IS_TIM_OUTPUTN_STATE(TIM_OCInitStruct->TIM_OutputNState)); // <- line 811

TIM_OC1Init() 函数似乎适用于 TIM3，但不适用于 TIM1。我在这个论坛上看到其他人对 TIM1 使用 TIM_OC1Init()，所以我不确定我的问题是什么。这不是我设置ch.1的方式吗？

Answer 1

这很奇怪，您使用您提供的代码在 IS_TIM_OUTPUTN_STATE 行编程失败，当然这可能是 STL 错误，但听起来不太可能。所以尝试在 TIM_OutputNState_Enable 上更改 TIM_OutputNState_Disable。

如果catch assert程序陷入死循环，下面的设置代码不会执行，所以不会产生pwm信号。您也可以尝试使用未定义的 USE_FULL_ASSERT 配置计时器，糟糕的策略但至少不会导致断言。

代码方面，可以尝试加入TIM_CtrlPWMOutputs(TIM1,ENABLE);配置并启用定时器后。你的功能对我来说似乎很奇怪，因为你要么在启用 rcc（这是错误的）之前调用 TIM_PWM_Init() ，要么在启用计时器之后调用，这也很奇怪。

我认为解决问题最简单的方法是 copy-paste 所有来自 SPL 示例（如 "STM32F0xx_StdPeriph_Lib_V1.5.0\Projects\STM32F0xx_StdPeriph_Examples\TIM\TIM_7PWMOutputs"）的漂亮代码，然后删除多余的代码。

在 STM32F0 上使用 TIM1 进行 PWM 时出错

Error using TIM1 for PWM on STM32F0

c

microcontroller

stm32

stm32f0