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在cc5.2软件下把程序下载到f2812 总是报错

使用的版本是ccs5.2 
使用的程序是ti例程,例程见附件,DSP281x_examples_ccsv4文件夹中的一个简单例程,项目名:Example_281xGpioToggle

硬件仿真没有问题,仿真运行结果与程序运行结果相符,但当我想把程序下载到2812芯片的时候就总是报错
比如:
C28xx: GEL: Error while executing OnReset(0): 'Unlock_CSM()' not found         at Unlock_CSM() [r2812.gel:40]         at OnReset(0) .


C28xx: GEL: Encountered a problem loading file: C:\Users\Administrator\Desktop\v120\DSP281x_examples_ccsv4\gpio_toggle\Release\Example_281xGpioToggle.out Could not open file

ERROR: The C2000v5.2.1 compiler, or any version compatible with it, is not currently installed! Please migrate the project to one of the supported compilers first.

查阅了很多资料,问题依然存在

考虑到ccs5.2不需要gel文件了,而我用的TI例程是过去版本,我估计是ccs5.2和gel文件之间出了问题,但一直找不出来,请各位高手多多指点。谢谢,谢谢