用stm32hal库写一个用pwm输出替代spi的sck信号

以下是一个使用STM32 HAL库写的使用PWM输出替代SPI SCK信号的示例代码：

#include "stm32f4xx_hal.h"
#include "stm32f4xx_hal_spi.h"
#include "main.h"

// 定义SPI信号的引脚
#define SS_Pin GPIO_PIN_3
#define SS_GPIO_Port GPIOB
#define MOSI_Pin GPIO_PIN_5
#define MOSI_GPIO_Port GPIOB
#define MISO_Pin GPIO_PIN_4
#define MISO_GPIO_Port GPIOB
#define SCK_Pin GPIO_PIN_3
#define SCK_GPIO_Port GPIOA

// 定义PWM信号的引脚和参数
#define PWM_Pin GPIO_PIN_6
#define PWM_Port GPIOA
#define PWM_Freq 1000000
#define PWM_Duty 50

// 定义SPI句柄和PWM句柄
SPI_HandleTypeDef hspi1;
TIM_HandleTypeDef htim3;

// 初始化SPI接口
void MX_SPI1_Init(void) {
  hspi1.Instance = SPI1;
  hspi1.Init.Mode = SPI_MODE_MASTER;
  hspi1.Init.Direction = SPI_DIRECTION_2LINES;
  hspi1.Init.DataSize = SPI_DATASIZE_8BIT;
  hspi1.Init.CLKPolarity = SPI_POLARITY_LOW;
  hspi1.Init.CLKPhase = SPI_PHASE_1EDGE;
  hspi1.Init.NSS = SPI_NSS_SOFT;
  hspi1.Init.BaudRatePrescaler = SPI_BAUDRATEPRESCALER_2;
  hspi1.Init.FirstBit = SPI_FIRSTBIT_MSB;
  hspi1.Init.TIMode = SPI_TIMODE_DISABLE;
  hspi1.Init.CRCCalculation = SPI_CRCCALCULATION_DISABLE;
  hspi1.Init.CRCPolynomial = 10;
  if (HAL_SPI_Init(&hspi1) != HAL_OK) {
    Error_Handler();
  }
}

// 初始化PWM输出
void MX_TIM3_Init(void) {
  TIM_ClockConfigTypeDef sClockSourceConfig = {0};
  TIM_MasterConfigTypeDef sMasterConfig = {0};
  TIM_OC_InitTypeDef sConfigOC = {0};

  htim3.Instance = TIM3;
  htim3.Init.Prescaler = 0;
  htim3.Init.CounterMode = TIM_COUNTERMODE_UP;
  htim3.Init.Period = 255;
  htim3.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
  if (HAL_TIM_Base_Init(&htim3) != HAL_OK) {
    Error_Handler();
  }
  sClockSourceConfig.ClockSource = TIM_CLOCKSOURCE_INTERNAL;
  if (HAL_TIM_ConfigClockSource(&htim3, &sClockSourceConfig) != HAL_OK) {
    Error_Handler();
  }
  if (HAL_TIM_PWM_Init(&htim3) != HAL_OK) {
    Error_Handler();
  }
  sMasterConfig.MasterOutputTrigger = TIM_TRGO_RESET;
  sMasterConfig.MasterSlaveMode = TIM_MASTERSLAVEMODE_DISABLE;
  if (HAL_TIMEx_MasterConfigSynchronization(&htim3, &sMasterConfig) != HAL_OK) {
    Error_Handler();
  }
  sConfigOC.OCMode = TIM_OCMODE_PWM1;
  sConfigOC.Pulse = 0;
  sConfigOC.OCPolarity = TIM_OCPOLARITY_HIGH;
  sConfigOC.OCFastMode = TIM_OCFAST_DISABLE;
  if (HAL_TIM_PWM_ConfigChannel(&htim3, &sConfigOC, TIM_CHANNEL_1) != HAL_OK) {
    Error_Handler();
  }
  HAL_TIM_PWM_Start(&htim3, TIM_CHANNEL_1);
}

int main(void) {
  // 初始化HAL库和硬件
  HAL_Init();
  SystemClock_Config();
  MX_GPIO_Init();
  MX_SPI1_Init();
  MX_TIM3_Init();

  // 循环读写数据
  while (1) {
    // 使用SPI接口读写数据
    HAL_GPIO_WritePin(SS_GPIO_Port, SS_Pin, GPIO_PIN_RESET);
    HAL_SPI_Transmit(&hspi1, (uint8_t*)"\x01\x02", 2, 10);
    HAL_GPIO_WritePin(SS_GPIO_Port, SS_Pin, GPIO_PIN_SET);
    HAL_Delay(10);

    // 使用PWM输出SCK信号
    __HAL_TIM_SET_COMPARE(&htim3, TIM_CHANNEL_1, 255*PWM_Duty/100);
    HAL_Delay(1);
    __HAL_TIM_SET_COMPARE(&htim3, TIM_CHANNEL_1, 0);
    HAL_Delay(1);
  }
}

这段代码中，我们首先通过CubeMX工具生成了HAL库的初始化代码，然后在`main()`函数中初始化了SPI接口和PWM输出。在循环中，我们分别使用SPI接口和PWM信号进行数据传输。在使用PWM信号输出SCK信号时，我们通过`__HAL_TIM_SET_COMPARE()`函数控制PWM信号的占空比和频率，模拟SPI接口的时钟信号。需要注意的是，在使用PWM信号时，我们需要根据具体的SPI设备和数据传输要求来确定PWM信号的参数，以确保数据传输的正确性和可靠性。