stm32f407zg hal库写一个timer6延时1us的代码

下面是基于STM32CubeMX和HAL库的代码示例：

首先，在STM32CubeMX中配置Timer6为计数器模式，时钟源为内部时钟，预分频器为167，自动重载值为1。

然后，生成代码并在main.c中添加以下代码：

#include "main.h"
#include "stm32f4xx_hal.h"
#include "stdio.h"

TIM_HandleTypeDef htim6;

void SystemClock_Config(void);
static void MX_GPIO_Init(void);
static void MX_TIM6_Init(void);

int main(void)
{
  HAL_Init();
  SystemClock_Config();
  MX_GPIO_Init();
  MX_TIM6_Init();

  while (1)
  {
    // 启动计数器
    HAL_TIM_Base_Start(&htim6);

    // 这里延时1us
    while (__HAL_TIM_GET_FLAG(&htim6, TIM_FLAG_UPDATE) == RESET);
    __HAL_TIM_CLEAR_FLAG(&htim6, TIM_FLAG_UPDATE);

    // 停止计数器
    HAL_TIM_Base_Stop(&htim6);
  }
}

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

  /* Configure the main internal regulator output voltage */
  __HAL_RCC_PWR_CLK_ENABLE();
  __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);
  /* Initializes the CPU, AHB and APB busses clocks */
  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI;
  RCC_OscInitStruct.HSIState = RCC_HSI_ON;
  RCC_OscInitStruct.HSICalibrationValue = RCC_HSICALIBRATION_DEFAULT;
  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
  RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI;
  RCC_OscInitStruct.PLL.PLLM = 16;
  RCC_OscInitStruct.PLL.PLLN = 336;
  RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV4;
  RCC_OscInitStruct.PLL.PLLQ = 7;
  if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
  {
    Error_Handler();
  }
  /* Initializes the CPU, AHB and APB busses clocks */
  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_DIV4;
  RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV2;

  if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_5) != HAL_OK)
  {
    Error_Handler();
  }
}

static void MX_TIM6_Init(void)
{
  TIM_MasterConfigTypeDef sMasterConfig = {0};

  htim6.Instance = TIM6;
  htim6.Init.Prescaler = 167;
  htim6.Init.CounterMode = TIM_COUNTERMODE_UP;
  htim6.Init.Period = 1;
  if (HAL_TIM_Base_Init(&htim6) != HAL_OK)
  {
    Error_Handler();
  }
  sMasterConfig.MasterOutputTrigger = TIM_TRGO_RESET;
  sMasterConfig.MasterSlaveMode = TIM_MASTERSLAVEMODE_DISABLE;
  if (HAL_TIMEx_MasterConfigSynchronization(&htim6, &sMasterConfig) != HAL_OK)
  {
    Error_Handler();
  }
}

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

#ifdef  USE_FULL_ASSERT

void assert_failed(uint8_t *file, uint32_t line)
{ 
}

#endif

以上代码中，使用了HAL_TIM_Base_Start()函数启动计数器，然后使用了while循环等待计数器溢出，最后使用HAL_TIM_Base_Stop()函数停止计数器。

需要注意的是，由于时钟源为内部时钟，预分频器为167，自动重载值为1，所以每一次计数器溢出时间为1us。