From 7410377b0cecf00a38b53a073d2ca0edb424d4e2 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Martin=20Stensg=C3=A5rd?= Date: Wed, 16 Jul 2025 21:32:10 +0200 Subject: move top -> record --- top.v | 125 ------------------------------------------------------------------ 1 file changed, 125 deletions(-) delete mode 100644 top.v (limited to 'top.v') diff --git a/top.v b/top.v deleted file mode 100644 index cb9e729..0000000 --- a/top.v +++ /dev/null @@ -1,125 +0,0 @@ -module top( - input clk, - input ftdi_rx, - output D1, - output D2, - output D3, - output D4, - output D5, - output ftdi_tx, - output p44, - output p45, - output pdm_clk, - input pdm_dat -); - wire clk_uart; - - reg [7:0] char = 8'h6f; - reg uart_go = 0; - wire uart_ready; - - clk_div_pdm clk_div_pdm_1(clk, pdm_clk); - clk_div_uart clk_div_uart_1(clk, clk_uart); - uart_tx uart_tx_1(clk_uart, char, uart_go, ftdi_tx, uart_ready); - - reg [2:0] pdm_t = 0; - always @(posedge pdm_clk) begin - pdm_t <= pdm_t<7 ? pdm_t+1 : 0; - char[pdm_t] <= pdm_dat; - uart_go <= pdm_t==7; - end - - assign D1 = 0; - assign D2 = 0; - assign D3 = 0; - assign D4 = 0; - assign D5 = 1; - assign p44 = 0; - assign p45 = 0; -endmodule - -module clk_div_pdm(input clk, output reg clk_pdm); - reg [3:0] t = 0; - always @(posedge clk) begin - t <= t<12-1 ? t+1 : 0; - clk_pdm <= t<6; - end -endmodule - -module rot(input clk, output [3:0] d); - reg [3:0] r = 4'b1000; - always @(posedge clk) r <= {r[0], r[3:1]}; - assign d = r; -endmodule - -module clk_div_uart(input clk, output reg clk_uart); - reg [3:0] t = 0; - always @(posedge clk) begin - t <= t<4-1 ? t+1 : 0; - clk_uart <= t<2; - end -endmodule - -module uart_tx(input clk, input [7:0] char, input go, output reg tx, output reg ready); - parameter s_ready = 0; - parameter s_start = 1; - parameter s_data0 = 2; - parameter s_data1 = 3; - parameter s_data2 = 4; - parameter s_data3 = 5; - parameter s_data4 = 6; - parameter s_data5 = 7; - parameter s_data6 = 8; - parameter s_data7 = 9; - parameter s_stop1 = 10; - parameter s_stop2 = 11; - parameter s_stop3 = 12; - parameter s_stop4 = 13; - - reg [3:0] state = s_ready; - reg [7:0] data = 8'h41; - - always @(posedge clk) begin - ready <= state == s_ready; - case (state) - s_ready: begin - if (go) begin - data <= char; - state <= s_start; - end - end - s_start: state <= s_data0; - s_data0: state <= s_data1; - s_data1: state <= s_data2; - s_data2: state <= s_data3; - s_data3: state <= s_data4; - s_data4: state <= s_data5; - s_data5: state <= s_data6; - s_data6: state <= s_data7; - s_data7: state <= s_stop1; - s_stop1: state <= s_stop2; - s_stop2: state <= s_stop3; - s_stop3: state <= s_stop4; - s_stop4: begin - if (!go) - state <= s_ready; - end - endcase - case (state) - s_ready: tx <= 1; - s_start: tx <= 0; - s_data0: tx <= data[0]; - s_data1: tx <= data[1]; - s_data2: tx <= data[2]; - s_data3: tx <= data[3]; - s_data4: tx <= data[4]; - s_data5: tx <= data[5]; - s_data6: tx <= data[6]; - s_data7: tx <= data[7]; - s_stop1: tx <= 1; - s_stop2: tx <= 1; - s_stop3: tx <= 1; - s_stop4: tx <= 1; - endcase - end -endmodule -- cgit v1.2.3