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msp430f249的主控,JTAG接口IAR仿真提示错误 Fatal error: Could not find device (or device not supported)   Session aborted!



我有一块msp430f5438A的板子,同样的仿真器,也是这个错误

Mon Oct 03, 2016 00:09:05: Firmware version 3.8.0.0

Mon Oct 03, 2016 00:09:05: Interface dll version 3.8.1.0

Mon Oct 03, 2016 00:09:11: Unknown device : (OpenDevice) , Device=MSP430F5438A, PwLength=0x0

Mon Oct 03, 2016 00:09:32: Fatal error: Could not find device (or device not supported)   Session aborted!

但是这个板子用BSL的时候也无法下载,提示BSL初始化失败,加载BSL密码失败,

msp430f249的板子是我自己做的,做的时候使用的是十针脚,之后用杜邦线直接连接的,没有RET的引线,

然后不管是msp-eft430uif 仿真器的4脚NC接内部电源,或者是2脚悬空接外部电源,都还是这个错误

系统是win10 家庭版,我在朋友win7 的电脑上试过还是这个错误,iar是6.4版本的,我已经搞了三天了,f249的板子直接制作的pcb,硬件连接应该没问题,这到底是怎么回事 ?求助帮忙,很急啊