DSP调试报错:OMAPL138 Connect to PRSC failed

使用CCS5 烧写 OMAPL138 芯片时候出现 仿真器 连接 PRSC失败的情况,如下:
>>> Connect to PRSC failed

这里写图片描述

查阅资料分析可能是 OMAPL138 E 的后缀是E, 与开发版本的B不同导致的;TI有相关的解释
错误跟E加密有关。

OMAPL138BZWTD4 – 普通版
OMAPL138BZWTD4E – 加密版

后缀E的话,表示加密版本,每次上电后要先解密才能连JTAG口,所以我们建议先用不带E的版本调通后,最后量产阶段用E替代。具体如何解密见下面的wiki网站
http://processors.wiki.ti.com/index.php/Basic_Secure_Boot_for_OMAP-L138_C6748#How_to_debug_secure_device.3F

How to debug secure device?
Application development and debugging on a secure device is not really recommended but there is flexibility in the boot process that allow this functionality when required.
The ini file for creation of secure boot images contains field called BootExitType and TAPCFG. Specifying the BootExit type as NONSECURE and TAPCFG = 0x0000FFFF will force
the device to exit ROM boot in NON-secure mode and open the JTAG pins to connect the emulator.

详细的介绍》》
加密版TMS320C6748 DSP处理器加密原理及使用详解
http://www.51ele.net/forum.php?mod=viewthread&tid=1244&extra=page%3D1

最终调试发现原因在于, 电阻阻值错误导致的, 修正后OMAPL138E 芯片可以正常烧录。
 

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