使用Keil开发环境对STM32L Discovery进行开发,更新一次firmware后就不能连接目标板了,报错Internal command error Flash download failed target dll has been can.最后将Keil更新至4.60就可了. 使用过程中,当目标板的芯片处于休眠的时候,在尝试连接目标板时候也会出现报错Internal command error Flash download failed target dll has been can