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无法下载程序的问题

Other Parts Discussed in Thread: MSP430F4250

我用的是IAR FOR MSP430 6.4这个版本,用的芯片是MSP430F4250,系统是WIN32的,用的仿真器是LSD-FETUIF的,IAR的设置参考的是wenku.baidu.com/link

Sun Apr 10, 2016 19:44:05: Using license: Standalone license - IAR Embedded Workbench for Texas Instruments MSP430, 8K KickStart Edition 6.40
Sun Apr 10, 2016 19:44:05: Could not find MSP-FET430UIF on specified COM port : (Initialize) , port=USB, version=0xffffffff
Sun Apr 10, 2016 19:44:19: Fatal error: Failed to re-initialize Session aborted!

能确定的是驱动是安装了的,硬件电路也检查了,也重启了电脑,可是问题一直没有得到解决。各位高手,能帮我解决下么?