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f28335设备使用serial_flash_programmer下载DSP用户程序一半时收不到校验位了是什么原因?

各位,大家好:

       最近我在使用TI提供的Demo程序serial_flash_programmer对f28335设备进行下载程序,内核程序(Flash_APIV2.1)成功下载并运行,就在用户程序即我自己的DSP程序下载一半的时候下载函数从串口收不到块教研位了,请问有没有遇到过的大哥,指点一下。

程序运行如下:

C2000 Serial Firmware Upgrader
Copyright (c) 2013 Texas Instruments Incorporated.  All rights reserved.
getting comm state
building comm DCB
adjusting port settings
calling f05_DownloadImage
Downloading CDRM3_AFRP_HW1.0_US_FW2.txt to device...
Kernel AutoBaud Successful
Kernel Loaded
Done Waiting for kernel boot...attempting autobaud
Application AutoBaud Successful
在我跟踪了VS代码后发现,程序运行到了f05_DownloadImage.cpp文件的int f05_DownloadImage(void)函数的ReadFile(file, &rcvData, 1, &dwRead, NULL);这句代码处一直读到不到内容,所在一直在这里死循环,请大家给我点意见谢谢。