123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162 |
- `default_nettype none
- module dfu_helper #(
- parameter integer TIMER_WIDTH = 24,
- parameter integer BTN_MODE = 3,
- parameter integer DFU_MODE = 0
- )(
-
- input wire [1:0] boot_sel,
- input wire boot_now,
-
- input wire btn_pad,
- input wire btn_tick,
-
- output wire btn_val,
- output reg rst_req,
-
- input wire clk,
- input wire rst
- );
-
-
-
- wire btn_iob;
- wire btn_v;
- wire btn_r;
- wire btn_f;
-
- reg armed;
- reg [TIMER_WIDTH-1:0] timer;
- (* keep="true" *) wire timer_act;
-
- reg [1:0] wb_sel;
- reg wb_req;
- reg wb_now;
-
-
-
- generate
- if (BTN_MODE[1])
- SB_IO #(
- .PIN_TYPE(6'b000000),
- .PULLUP(1'b1),
- .IO_STANDARD("SB_LVCMOS")
- ) btn_iob_I (
- .PACKAGE_PIN(btn_pad),
- .INPUT_CLK (clk),
- .D_IN_0 (btn_iob)
- );
- else
- assign btn_iob = btn_pad;
- endgenerate
-
- glitch_filter #(
- .L(BTN_MODE[2] ? 2 : 4),
- .RST_VAL(BTN_MODE[0]),
- .WITH_SYNCHRONIZER(1),
- .WITH_SAMP_COND(BTN_MODE[2])
- ) btn_flt_I (
- .in (btn_iob ^ BTN_MODE[0]),
- .samp_cond(btn_tick),
- .val (btn_v),
- .rise (btn_r),
- .fall (btn_f),
- .clk (clk),
- `ifdef SIM
- .rst (rst)
- `else
-
-
- .rst (1'b0)
- `endif
- );
- assign btn_val = btn_v;
-
-
- assign timer_act = btn_v ^ armed;
- always @(posedge clk or posedge rst)
- if (rst)
- armed <= 1'b0;
- else
- armed <= armed | timer[TIMER_WIDTH-2];
- always @(posedge clk or posedge rst)
- if (rst)
- timer <= 0;
- else
- timer <= timer_act ? { TIMER_WIDTH{1'b0} } : (timer + { { (TIMER_WIDTH-1){1'b0} }, ~timer[TIMER_WIDTH-1] });
-
-
-
- always @(posedge clk or posedge rst)
- if (rst) begin
- wb_sel <= 2'b00;
- wb_req <= 1'b0;
- rst_req <= 1'b0;
- end else if (~wb_req) begin
- if (boot_now) begin
-
- wb_sel <= boot_sel;
- wb_req <= 1'b1;
- rst_req <= 1'b0;
- end else begin
- if (DFU_MODE == 1) begin
-
-
- wb_sel <= 2'b10;
- wb_req <= wb_now | (armed & btn_f);
- rst_req <= 1'b0;
- end else begin
-
-
- wb_sel <= 2'b01;
- wb_req <= wb_now | (armed & btn_f & timer[TIMER_WIDTH-1]);
- rst_req <= rst_req | (armed & btn_f & ~timer[TIMER_WIDTH-1]);
- end
- end
- end
-
- always @(posedge clk or posedge rst)
- if (rst)
- wb_now <= 1'b0;
- else
- wb_now <= wb_req;
-
- SB_WARMBOOT warmboot (
- .BOOT(wb_now),
- .S0(wb_sel[0]),
- .S1(wb_sel[1])
- );
- endmodule
|