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28062 脱离仿真器SCIA无法正常工作,SCIB能正常工作



28062的SCIA和SCIB在带仿真器的时候通讯都正常,系统运行的指示灯闪烁;拿掉仿真器后,SCIA不能正常通讯,SCIB能正常通讯,系统运行的指示灯正常闪烁;再插上仿真器,SCIA通讯正常了;拔掉仿真器,SCIA通讯依然不正常。反复多次都是这样。可以很明确的说硬件没有问题,外围接线也没有问题,关键点就在仿真器接与不接,初步判断是哪个地方的配置有问题,有哪位大侠知道这是什么原因不?