GD32E230X字节指针转成整形指针访问内存进入HardFault_Handler

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#单片机 #arm #c语言

GD32E230X字节指针转成整形指针访问

定义一个串口缓冲区 uint8_t TxBuf[1024]，接收到的数据需要写入Flsh，写入按字写入，uint32_t da;da= *(uint32_t *)TxBuf , 执行这个操作MCU进入HardFault_Handler。找了半天，发现TxBuf的地址不是整4倍，转成32位访问就出错。所以写个将uint8_t 转uint32_t的函数转成U32再使用。

uint32_t bytes_to_uint32(const uint8_t* bytes) {
    return (uint32_t)bytes[0] | 
           ((uint32_t)bytes[1] << 8) | 
           ((uint32_t)bytes[2] << 16) | 
           ((uint32_t)bytes[3] << 24);
}
TestStatus Fmc_Write_Page(uint8_t *buf,uint32_t position,uint16_t Leng)
{
    uint32_t Address;
    TestStatus TransferStatus = FAILED;
    uint32_t i;
	uint32_t da;	
	Address = USER_APP2_ADDRESS;
	Address += 1024 * (position/1024);  //
    // 关闭总中断
    __set_PRIMASK(1);
    /* unlock the flash program/erase controller */
    fmc_unlock();
    /* clear all pending flags */
    fmc_flag_clear(FMC_FLAG_END | FMC_FLAG_WPERR | FMC_FLAG_PGERR);	
	fmc_page_erase(Address);
	for(i=0;i<n;i++)
		{
				da = bytes_to_uint32(buf);
				/* The operation will be done by word and Check the written value*/
				if (fmc_word_program(Address,da) != FMC_READY)
				{
						TransferStatus = ERROR;
						break;
				}
				Address += 4;
				buf += 4;
				fmc_flag_clear(FMC_FLAG_END | FMC_FLAG_WPERR | FMC_FLAG_PGERR);
		}	
    /* lock the main FMC after the erase operation */
    fmc_lock();	
    // 开启总中断
    __set_PRIMASK(0);	 
    return TransferStatus;
}