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- 首先分别向A口和B口写入80H和01H,然后分别将该数右移和左移一位,再送到端口上,这样循环下去,从而实现流水灯的显示。-A first written, respectively, to the port and the B port 80H and 01H, respectively, then the number of right and left one, and then sent on a port, so the cycle continues, in order to achi
