Error (10029): Constant driver at beep_control.v(56)解决.Can't resolve multiple constant drivers

如下的源码便宜的时候报错：

always @ (posedge sys_clk) beginif(!sys_rst_n)beepcnt <= 4'b0;//错误在这里elseif(beepflag == 1)   begin   if(beepcnt >= 16'd45_000)//if(beepcnt > 4'd5)beep <= 1'b0;    elsebeep <= 1'b1;endelse begin //if(beepcnt >= 16'd25_000)beep <= 1'b0;    endend//这是个分频器，1KHz
always @ (posedge sys_clk or negedge sys_rst_n) beginif(!sys_rst_n)beepcnt <= 4'b0;elseif(beepcnt >= 16'd50_000)  //if(beepcnt >= 4'd10)  beepcnt <= 4'b0;  elsebeepcnt <= beepcnt + 16'b1;//beepcnt <= beepcnt + 4'd1;end

错误在注释处，因为在两个always里面都改变了beepcnt 的值，这是不被允许的，情况与.Can't resolve multiple constant drivers for net相同，都是多处都驱动同一个变量的问题，去掉某一个即可。

我的工程做完了是这样的：

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Error (10029): Constant driver at beep_control.v(56)解决.Can't resolve multiple constant drivers

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