蜂鸣器的学习笔记_小四叶草.pdf

文档介绍：!"#$%&' $%#()*+,-./012#34*5562*77$%*889/::::::: ;+ !"<fpga#=>?@*ABCDEfpga #I/O >FG?H#()*IJKLM* !"NOPQEfpga#I/O>FR?H#()*IJKST* !"OP: UV# !"34D moduleclkdiv( clk,rst_n, clk_div ); inputclk; //50MHz inputrst_n; //R?HWXYZ outputclk_div; //[\YZ*]=^ !" //--------------------------------------------------- reg[19:t;//[\_`" always@(posedgeclkor negedgerst_n) //abWX if(!t<= 20'd0; t<=cnt+1'b1; //t 20msef_` //---------------------------------------------------- regclk_div_r;//clk_divYZgcd" always@(posedgeclkor negedgerst_n) if(!rst_n)clk_div_r<= 1'b0; t== 20'hfffff)clk_div_r<=~clk_div_r;//h20msiclk_div_rgjklm assignclk_div=clk_div_r; endmodule