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View Code? Open in Web Editor NEWSTM32 IAP(UART模式)的BOOT部分
STM32 IAP(UART模式)的BOOT部分
我的板子一直以来USART BOOT模式进不了,显示init device fail , 感觉是ST 出厂 SP Bootloader有问题,用Jlink Dump 0x0-0x7FFFFFF 内容是空的,所以想试下其它boot loader,用FLASH ROM启动,
现在下载了你的这个BOOT,烧进去后,模式BOOT0 =0, 用串口得到的是乱码,
请问是怎么回事?谢谢
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目前看代码,有点疑惑,目前想在h7上移植下:
1.上位机在发送SOT后,bootloader端会发送ACK,但是看上位机并没有处理该回执,然后上位机再次发送closingpacket,bootloader接收然后处理成功后发送ACk并且退出;是不是上位机应该在SOT后处理一次ACK
2.bootloader处理filesize时为什么是判定空格符呢,我看上位机填充的结束符是0
for (i = 0, file_ptr ++; (*file_ptr != ' ') && (i < FILE_SIZE_LENGTH);)
{
3.bootloader在接收packet出错时,应该直接发送nack之类的直接结束下载吧,为啥是统计error呢,下载出错还继续下载流程,不太理解设计初衷是什么
default://error check yang:maybe poor,should abort directly
if (session_begin > 0)
{
errors ++;
}
if (errors > MAX_ERRORS)
{
Send_Byte(CA);
Send_Byte(CA);
return 0;
}
Send_Byte(CRC16);//send crcֵ
break;
能否解答下
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