摘要： Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/-->module keyscan( clk, rst_n, sw1_n, sw2_n, sw3_n, //output led_d3, led_d4, led_d5 ); input clk; //主时钟信号，48MHz input rst_n; //复位信号，低有效 input sw1_n,sw2_n,sw3_n; //三个独立按键，低表示按下 output led_d3,led_d4,led_d 阅读全文