STM32H7 为什么要32字节的整数倍才能写？

casy99

代码如下：

[C] 纯文本查看 复制代码

/*******************************************************************************************
  * @brief  This function writes a data buffer in flash (data are 32-bit aligned).
  * @note   Buff size 必须4字节对齐
  * @param  FlashAddress: start address for writing data buffer
  * @param  Data: pointer on data buffer
  * @param  DataLength: length of data buffer (unit is 32-bit word)   
  *****************************************************************************************/
Func_Status BSP_FLASH_Write(uint32_t FlashAddress,  void *pBuffer ,  uint32_t WordLength)
{
	Func_Status ret = Ret_OK;
	if((FlashAddress < APP_START_ADDR) || (FlashAddress > FLASH_END_ADDR))
	{
		ret = Ret_PARAM_ERR;
		return ret;
	}

	HAL_FLASH_Unlock();

	for (int i = 0; i < WordLength; i+=8)
	{
		if (HAL_FLASH_Program(FLASH_TYPEPROGRAM_FLASHWORD, FlashAddress, ((uint32_t)(pBuffer+i))) == HAL_OK)
		{
			FlashAddress += 32;
		}
		else
		{
			ret = Ret_ERROR;
		}
	}
	HAL_FLASH_Lock();
	return ret;
}

casy99

这是硬汉哥的历程里的代码，看了几遍，没看懂~

eric2013

这个是数据手册里面的硬性要求，操作单位256bit

casy99

确实，手册看少了