【正文】 se/**********************************************************/assign ten_smg_data = rTen_SMG_Data。assign one_smg_data = rOne_SMG_Data。/**********************************************************/ 狀態(tài)轉換模塊：/************狀態(tài)轉換*************/parameter state_0 = 239。b00,state_1 = 239。b01,state_2 = 239。b10,state_3 = 239。b11。reg [1:0]CS。reg [1:0]flag。reg [3:0]count_H , count_L。reg [3:0]count_H1 , count_L1。reg ECS。reg[2:0]light_zhu。 //light_zhu[0] ??light_zhu[1] ???light_zhu[2] ??reg[2:0]light_zhi。 //light_zhi[0] ??light_zhi[1] ???light_zhi[2] ??initial begin8CS = 239。b00。flag = 239。b00。ECS = 1。count_H = 439。b0000。count_L = 439。b0000。count_H1 = 439。b0000。count_L1 = 439。b0000。light_zhu = 339。b000。light_zhi = 339。b000。endalways @ ( posedge clk_1Hz or negedge nrst )if(!ECS)beginECS = 1。endelsebeginif( !nrst )beginCS = state_0。flag = 239。b00。state_0_init。endelsecase( CS )state_0: if( flag == 239。b00 ) //狀態(tài)0, 35sbeginif( !count_H amp。amp。 ( count_L == 439。b0110 ) ) //5sbeginflag = 239。b01。CS = state_1。state_1_init。 //state_1endelse if( !count_L )begincount_L = 439。b1001。count_H = count_H1。endelsebegincount_L = count_L1。endif( !count_L1 )begin9count_L1 = 439。b1001。count_H1 = count_H11。endelsebegincount_L1 = count_L11。endendstate_1: if( flag == 239。b01 ) //狀態(tài)1,5sbeginif( !count_L )beginflag = 239。b10。CS = state_2。state_2_init。 //狀態(tài)2endelsebegincount_L = count_L1。count_L1=count_L。ECS = 0。endendstate_2: if( flag == 239。b10 ) //狀態(tài)2,25sbeginif( !count_H amp。amp。 ( count_L == 439。b0110 ) ) //5sbeginflag = 239。b11。CS = state_3。state_3_init。 //state_3endelse if( !count_L )begincount_L = 439。b1001。count_H = count_H1。endelsebegincount_L = count_L1。endif( !count_L1 )begincount_L1 = 439。b1001。count_H1 = count_H11。10endelsebegincount_L1 = count_L11。endendstate_3: if( flag == 239。b11 ) //狀態(tài)3,5sbeginif( !count_L )beginflag = 239。b00。CS = state_0。state_0_init。 //狀態(tài)0endelsebegincount_L = count_L1。count_L1 = count_L。ECS = 0。endenddefault: beginflag =239。b00。CS = state_0。endendcaseend/*************************************/task state_0_init。begin//主干道綠燈45秒只干道count_H = 439。b0100。 //高位為4count_L = 439。b0101。 //低位為 5count_H1 = 439。b0101。 //高位5count_L1 = 439。b0000。 //低位0light_zhu = 339。b100。 //light_zhu[0]:0 , light_zhu[1]:0 , light_zhu[2]:1light_zhi = 339。b001。 //light_zhi[0]:0 , light_zhi[1]:0 , light_zhi[2]:1endendtask/*************************************//*************************************/task state_1_init。begin//黃燈 5秒count_H = 439。b0000。 //高位為0count_L = 439。b0101。 //低位為 511count_H1 = 439。b0000。count_L1 = 439。b0101。light_zhu = 339。b010。light_zhi = 339。b001。endendtask/*************************************/task state_2_init。begin//主干道紅燈25秒count_H = 439。b0010。 //高位為2count_L = 439。b0101。 //低位為 5count_H1= 439。b0010。 //高位為3count_L1 = 439。b0000。 //低位為 0light_zhu = 339。b001。light_zhi = 339。b100。endendtask/*************************************/task state_3_init。begin//5秒黃燈count_H = 439。b0000。 //高位為0count_L = 439。b0101。 //地位為 5count_H1 = 439。b0000。count_L1 = 439。b0101。light_zhu = 339。b001。light_zhi = 339。b010。endendtask/**************************/assign one_data = count_L。assign ten_data = count_H。assign one_data1 = count_L1。assign ten_data1 = count_H1。assign led_zhu = light_zhu。assign led_zhi = light_zhi。/**************************/