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你好,
我之前使用vertex5 写过这个程序,是没有问题的。首先,排除下硬件连接,比如Reset 引脚,这些信号给的对不对;其次,检查电源及上电有无问题;最后,我觉得很大可能是因为时序没有写对,可以对照下时序图逐个比特比对下。