IAP问题

发布于 2014-09-25 09:41:30 浏览：3977 订阅该版

5 个回答

aozima 2014-09-25

调网络不抓包，调I2C等时序不上逻辑分析仪，就像电工不用万用表！多用整理的好的文字，比截图更省流量，还能在整理过程中思考。

bjhdtv 2014-09-25

这家伙很懒，什么也没写！

感谢回复，我的意思就是说目前STM32F4板子上面的SPI-FLASH有Boot区域+APP区域，然后希望板子启动之到APP之后，能够mount TF卡，检测是否有升级文件rtthread.bin，有的话，则循环读取该文件，每次读256bytes，擦写到APP区域，全部擦写完毕，则跳转重启。
目前碰到的问题是：循环读取该文件，擦写到APP区域，FLASH_If_Write就挂掉了。
APP启动之后，能否自己擦写自己？
补充：
1）TF卡里面的rtthread.bin文件和烧入到APP一样，则反复写都没问题；一旦TF卡里面的rtthread.bin文件和烧入到APP不一样，则挂了。
2）APP是采用romfs，TF卡是fat32文件系统
3）附上代码：

```
if (dfs_file_open(&src_fd, "/sd/rtthread.bin", DFS_O_RDONLY) < 0)
	{
	    rt_kprintf("Open %s Failed
", "/sd/rtthread.bin");
	    return ;
	}
	else
	{
		rt_kprintf("Open %s OK,src_fd.size=%d
", "/sd/rtthread.bin",src_fd.size);
	}

if (src_fd.size > (USER_FLASH_SIZE + 1))
	{
		rt_kprintf("src_fd.size=%d > %d
",src_fd.size,USER_FLASH_SIZE+1);
		return ;
	}

/*rt_kprintf("FLASH_If_Erase start
");
	FLASH_If_Erase(APPLICATION_ADDRESS);
	rt_kprintf("FLASH_If_Erase over
");*/
	 rt_hw_interrupt_disable();

do
	{
		memset(block_ptr,0,BUZZER);
	    read_bytes = dfs_file_read(&src_fd, block_ptr, BUZZER);
	    if (read_bytes > 0)
	    {
	    	//write_spiflash(block_ptr,read_bytes);
	        //dfs_file_write(&fd, block_ptr, read_bytes);
			ramsource = (uint32_t)block_ptr;
			packet_length=BUZZER;
			totle_length+=read_bytes;
			/* Write received data in Flash */
			if (FLASH_If_Write(&flashdestination, (uint32_t*) ramsource, (uint16_t) packet_length/4)  == 0)
			{
			  rt_kprintf("write ok:%d,allszie=%d
",packet_length,totle_length);
			}
			else /* An error occurred while writing to Flash memory */
			{
			  rt_kprintf("write err:%d,allszie=%d
",packet_length,totle_length);
			  return ;
			}
	    }
	} while (read_bytes > 0);

dfs_file_close(&src_fd);

rt_thread_delay(RT_TICK_PER_SECOND * 3);
	rt_kprintf("FLASH_If_Write over:%d bytes,Now reboot
",totle_length);
	
	if (1) /* execute the new program */
	{
	  JumpAddress = *(__IO uint32_t*) (APPLICATION_ADDRESS + 4);
	  /* Jump to user application */
	  Jump_To_Application = (pFunction) JumpAddress;
	  /* Initialize user application's Stack Pointer */
	  __set_MSP(*(__IO uint32_t*) APPLICATION_ADDRESS);
	  Jump_To_Application();
	}
```