STM32F407采用HAL库通过I2C总线驱动PCA9552，I2C通过GPIO脚仿真I2C

好的，那我可以给你一些关于HAL库驱动I2C总线的PCA9552的示例代码。在使用HAL库驱动I2C总线时，需要配置I2C的GPIO引脚、I2C的时钟频率等参数。下面是一个简单的示例代码：

#include "stm32f4xx_hal.h"

#define PCA9552_ADDRESS 0x40

I2C_HandleTypeDef hi2c1;

void I2C_Init() {
  hi2c1.Instance = I2C1;
  hi2c1.Init.ClockSpeed = 100000;
  hi2c1.Init.DutyCycle = I2C_DUTYCYCLE_2;
  hi2c1.Init.OwnAddress1 = 0;
  hi2c1.Init.AddressingMode = I2C_ADDRESSINGMODE_7BIT;
  hi2c1.Init.DualAddressMode = I2C_DUALADDRESS_DISABLE;
  hi2c1.Init.OwnAddress2 = 0;
  hi2c1.Init.GeneralCallMode = I2C_GENERALCALL_DISABLE;
  hi2c1.Init.NoStretchMode = I2C_NOSTRETCH_DISABLE;
  if (HAL_I2C_Init(&hi2c1) != HAL_OK) {
    Error_Handler();
  }
}

void PCA9552_Write(uint8_t reg, uint8_t value) {
  uint8_t data[2] = {reg, value};
  HAL_I2C_Master_Transmit(&hi2c1, PCA9552_ADDRESS, data, 2, 100);
}

uint8_t PCA9552_Read(uint8_t reg) {
  uint8_t value = 0;
  HAL_I2C_Master_Transmit(&hi2c1, PCA9552_ADDRESS, &reg, 1, 100);
  HAL_I2C_Master_Receive(&hi2c1, PCA9552_ADDRESS, &value, 1, 100);
  return value;
}

int main() {
  HAL_Init();
  I2C_Init();
  PCA9552_Write(0x03, 0x05);
  uint8_t value = PCA9552_Read(0x03);
  return 0;
}

以上代码实现了通过GPIO仿真I2C总线，向PCA9552的0x03寄存器写入0x05，然后从PCA9552的0x03寄存器读取数据。你可以根据自己的实际情况进行修改。