stm32测两个不同频率方波的初始相位差hal库

在HAL库中，可以使用定时器来生成方波，并且可以通过设置不同的预分频器和计数器值来生成不同频率的方波。要测量两个不同频率方波的初始相位差，可以使用两个定时器分别产生两个方波，并通过输入捕获功能来测量两个方波的上升沿或下降沿之间的时间差。

以下是一个简单的示例代码，使用TIM2产生1kHz的方波，使用TIM3产生2kHz的方波，并通过输入捕获功能测量它们之间的初始相位差：

#include "stm32f4xx_hal.h"

TIM_HandleTypeDef htim2;
TIM_HandleTypeDef htim3;
TIM_IC_InitTypeDef sConfigIC;

void SystemClock_Config(void);
static void MX_GPIO_Init(void);
static void MX_TIM2_Init(void);
static void MX_TIM3_Init(void);

int main(void)
{
  HAL_Init();
  SystemClock_Config();
  MX_GPIO_Init();
  MX_TIM2_Init();
  MX_TIM3_Init();
  HAL_TIM_IC_Start_IT(&htim2, TIM_CHANNEL_1);
  HAL_TIM_IC_Start_IT(&htim3, TIM_CHANNEL_1);
  while (1)
  {
  }
}

void HAL_TIM_IC_CaptureCallback(TIM_HandleTypeDef *htim)
{
  static uint32_t tim2_count = 0;
  static uint32_t tim3_count = 0;
  static uint32_t tim2_time = 0;
  static uint32_t tim3_time = 0;
  if (htim->Instance == TIM2)
  {
    if (tim2_count == 0)
    {
      tim2_time = HAL_TIM_ReadCapturedValue(&htim2, TIM_CHANNEL_1);
      tim2_count++;
    }
  }
  else if (htim->Instance == TIM3)
  {
    if (tim3_count == 0)
    {
      tim3_time = HAL_TIM_ReadCapturedValue(&htim3, TIM_CHANNEL_1);
      tim3_count++;
    }
    else
    {
      uint32_t tim3_delta = HAL_TIM_ReadCapturedValue(&htim3, TIM_CHANNEL_1) - tim3_time;
      uint32_t tim2_delta = HAL_TIM_ReadCapturedValue(&htim2, TIM_CHANNEL_1) - tim2_time;
      float phase_diff = ((float)tim3_delta / (float)htim3.Init.Period) - ((float)tim2_delta / (float)htim2.Init.Period);
      // phase_diff为两个方波的初始相位差，单位为周期数
      tim2_count = 0;
      tim3_count = 0;
    }
  }
}

void MX_TIM2_Init(void)
{
  htim2.Instance = TIM2;
  htim2.Init.Prescaler = 83; // 84MHz / 84 = 1MHz
  htim2.Init.CounterMode = TIM_COUNTERMODE_UP;
  htim2.Init.Period = 999; // 1kHz
  htim2.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
  HAL_TIM_Base_Init(&htim2);
  HAL_TIM_PWM_Init(&htim2);
  TIM_OC_InitTypeDef sConfigOC;
  sConfigOC.OCMode = TIM_OCMODE_PWM1;
  sConfigOC.Pulse = 500; // 50% duty cycle
  sConfigOC.OCPolarity = TIM_OCPOLARITY_HIGH;
  sConfigOC.OCFastMode = TIM_OCFAST_DISABLE;
  HAL_TIM_PWM_ConfigChannel(&htim2, &sConfigOC, TIM_CHANNEL_1);
}

void MX_TIM3_Init(void)
{
  htim3.Instance = TIM3;
  htim3.Init.Prescaler = 41; // 84MHz / 42 = 2MHz
  htim3.Init.CounterMode = TIM_COUNTERMODE_UP;
  htim3.Init.Period = 499; // 2kHz
  htim3.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
  HAL_TIM_Base_Init(&htim3);
  HAL_TIM_PWM_Init(&htim3);
  TIM_OC_InitTypeDef sConfigOC;
  sConfigOC.OCMode = TIM_OCMODE_PWM1;
  sConfigOC.Pulse = 250; // 50% duty cycle
  sConfigOC.OCPolarity = TIM_OCPOLARITY_HIGH;
  sConfigOC.OCFastMode = TIM_OCFAST_DISABLE;
  HAL_TIM_PWM_ConfigChannel(&htim3, &sConfigOC, TIM_CHANNEL_1);
}

static void MX_GPIO_Init(void)
{
  __HAL_RCC_GPIOA_CLK_ENABLE();
  GPIO_InitTypeDef GPIO_InitStruct;
  GPIO_InitStruct.Pin = GPIO_PIN_5;
  GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;
  GPIO_InitStruct.Alternate = GPIO_AF1_TIM2;
  HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
  GPIO_InitStruct.Pin = GPIO_PIN_6;
  GPIO_InitStruct.Alternate = GPIO_AF2_TIM3;
  HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
}

void SystemClock_Config(void)
{
  RCC_OscInitTypeDef RCC_OscInitStruct = {0};
  RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
  /** Initializes the RCC Oscillators according to the specified parameters
  * in the RCC_OscInitTypeDef structure.
  */
  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 buses 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();
  }
}