如何使用STM32F103ZET6使用TIM5和PF4输出PWM波形

步骤如下：

1. 打开STM32CubeMX软件，在Pinout选项卡中将PF4配置为TIM5_CH4功能。

2. 在Configuration选项卡中，选择TIM5，并启用PWM输出模式。

3. 配置TIM5的时钟源和分频系数，以及PWM的周期和占空比。

4. 在代码中初始化TIM5，并启用PWM输出。

5. 在主循环中更新PWM占空比，以改变输出波形。

下面是示例代码：

#include "stm32f1xx_hal.h"
TIM_HandleTypeDef htim5;

void SystemClock_Config(void);
static void MX_GPIO_Init(void);
static void MX_TIM5_Init(void);
void HAL_TIM_MspPostInit(TIM_HandleTypeDef *htim);

int main(void)
{
  HAL_Init();
  SystemClock_Config();
  MX_GPIO_Init();
  MX_TIM5_Init();

  HAL_TIM_PWM_Start(&htim5, TIM_CHANNEL_4);

  while (1)
  {
    // Update PWM duty cycle to change output waveform
    __HAL_TIM_SET_COMPARE(&htim5, TIM_CHANNEL_4, 500);
    HAL_Delay(1000);
    __HAL_TIM_SET_COMPARE(&htim5, TIM_CHANNEL_4, 1000);
    HAL_Delay(1000);
  }
}

void SystemClock_Config(void)
{
  RCC_OscInitTypeDef RCC_OscInitStruct = {0};
  RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};

  __HAL_RCC_PWR_CLK_ENABLE();
  __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);

  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
  RCC_OscInitStruct.HSEState = RCC_HSE_ON;
  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
  RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
  RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL9;
  if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
  {
    Error_Handler();
  }

  RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_SYSCLK
                              | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2;
  RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
  RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
  RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV2;
  RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
  if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK)
  {
    Error_Handler();
  }
}

static void MX_TIM5_Init(void)
{
  TIM_MasterConfigTypeDef sMasterConfig = {0};
  TIM_OC_InitTypeDef sConfigOC = {0};

  htim5.Instance = TIM5;
  htim5.Init.Prescaler = 7199;
  htim5.Init.CounterMode = TIM_COUNTERMODE_UP;
  htim5.Init.Period = 999;
  htim5.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
  if (HAL_TIM_PWM_Init(&htim5) != HAL_OK)
  {
    Error_Handler();
  }

  sMasterConfig.MasterOutputTrigger = TIM_TRGO_RESET;
  sMasterConfig.MasterSlaveMode = TIM_MASTERSLAVEMODE_DISABLE;
  if (HAL_TIMEx_MasterConfigSynchronization(&htim5, &sMasterConfig) != HAL_OK)
  {
    Error_Handler();
  }

  sConfigOC.OCMode = TIM_OCMODE_PWM1;
  sConfigOC.Pulse = 500;
  sConfigOC.OCPolarity = TIM_OCPOLARITY_HIGH;
  sConfigOC.OCFastMode = TIM_OCFAST_DISABLE;
  if (HAL_TIM_PWM_ConfigChannel(&htim5, &sConfigOC, TIM_CHANNEL_4) != HAL_OK)
  {
    Error_Handler();
  }

  HAL_TIM_MspPostInit(&htim5);
}

static void MX_GPIO_Init(void)
{
  GPIO_InitTypeDef GPIO_InitStruct = {0};

  __HAL_RCC_GPIOF_CLK_ENABLE();

  GPIO_InitStruct.Pin = GPIO_PIN_4;
  GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;
  HAL_GPIO_Init(GPIOF, &GPIO_InitStruct);
}

void HAL_TIM_PWM_MspInit(TIM_HandleTypeDef *htim_pwm)
{
  if (htim_pwm->Instance == TIM5)
  {
    __HAL_RCC_TIM5_CLK_ENABLE();
  }
}

void HAL_TIM_MspPostInit(TIM_HandleTypeDef *htim)
{
  GPIO_InitTypeDef GPIO_InitStruct = {0};
  if (htim->Instance == TIM5)
  {
    __HAL_RCC_GPIOF_CLK_ENABLE();
    /**TIM5 GPIO Configuration
    PF4     ------> TIM5_CH4
    */
    GPIO_InitStruct.Pin = GPIO_PIN_4;
    GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
    GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
    HAL_GPIO_Init(GPIOF, &GPIO_InitStruct);
  }
}

void HAL_TIM_PWM_MspDeInit(TIM_HandleTypeDef *htim_pwm)
{
  if (htim_pwm->Instance == TIM5)
  {
    __HAL_RCC_TIM5_CLK_DISABLE();
  }
}

void Error_Handler(void)
{
  while (1)
  {
  }
}

在上面的示例代码中，PWM的周期为10ms，占空比从50%到100%不断变化，即输出的波形周期为10ms，高电平占空比从50%到100%不断变化。可以根据需要修改周期和占空比，以输出不同的波形。