51单片机没有硬件iic,我们是通过io口软件模拟iic时序 https://blog.youkuaiyun.com/weixin_63303786/article/details/128705478?spm=1001.2014.3001.5501https://blog.youkuaiyun.com/weixin_63303786/article/details/128705478?spm=1001.2014.3001.5501
而stm32有iic硬件,就不需要我们再软件模拟
HAL_StatusTypeDef HAL_I2C_Mem_Write ( I2C_HandleTypeDef * hi2c ,uint16_t DevAddress ,uint16_t MemAddress ,uint16_t MemAddSize ,uint8_t * pData ,uint16_t Size ,uint32_t Timeout )参数一: I2C_HandleTypeDef *hi2c , I2C 设备句柄参数二: uint16_t DevAddress &#