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| author | Clifford Wolf <clifford@clifford.at> | 2019-03-05 20:35:48 -0800 |
|---|---|---|
| committer | Clifford Wolf <clifford@clifford.at> | 2019-03-05 20:36:00 -0800 |
| commit | e22afeae907e6340aac7797f60c309916fd72097 (patch) | |
| tree | 3e4357258bed15ffc518228603c9e4f3a3184819 /examples | |
| parent | da5181a3df6ceed96f1762e4cdaec5cbe3ea23db (diff) | |
| download | yosys-e22afeae907e6340aac7797f60c309916fd72097.tar.gz yosys-e22afeae907e6340aac7797f60c309916fd72097.tar.bz2 yosys-e22afeae907e6340aac7797f60c309916fd72097.zip | |
Improve igloo2 example
Signed-off-by: Clifford Wolf <clifford@clifford.at>
Diffstat (limited to 'examples')
| -rw-r--r-- | examples/igloo2/example.pdc | 12 | ||||
| -rw-r--r-- | examples/igloo2/example.v | 44 |
2 files changed, 54 insertions, 2 deletions
diff --git a/examples/igloo2/example.pdc b/examples/igloo2/example.pdc index 0cf34adb3..298d9e934 100644 --- a/examples/igloo2/example.pdc +++ b/examples/igloo2/example.pdc @@ -1,8 +1,20 @@ # Add placement constraints here + set_io clk -pinname H16 -fixed yes -DIRECTION INPUT + set_io SW1 -pinname H12 -fixed yes -DIRECTION INPUT set_io SW2 -pinname H13 -fixed yes -DIRECTION INPUT + set_io LED1 -pinname J16 -fixed yes -DIRECTION OUTPUT set_io LED2 -pinname M16 -fixed yes -DIRECTION OUTPUT set_io LED3 -pinname K16 -fixed yes -DIRECTION OUTPUT set_io LED4 -pinname N16 -fixed yes -DIRECTION OUTPUT + +set_io AA -pinname L12 -fixed yes -DIRECTION OUTPUT +set_io AB -pinname L13 -fixed yes -DIRECTION OUTPUT +set_io AC -pinname M13 -fixed yes -DIRECTION OUTPUT +set_io AD -pinname N15 -fixed yes -DIRECTION OUTPUT +set_io AE -pinname L11 -fixed yes -DIRECTION OUTPUT +set_io AF -pinname L14 -fixed yes -DIRECTION OUTPUT +set_io AG -pinname N14 -fixed yes -DIRECTION OUTPUT +set_io CA -pinname M15 -fixed yes -DIRECTION OUTPUT diff --git a/examples/igloo2/example.v b/examples/igloo2/example.v index b701c707d..05b6ced5e 100644 --- a/examples/igloo2/example.v +++ b/examples/igloo2/example.v @@ -5,10 +5,13 @@ module example ( output LED1, output LED2, output LED3, - output LED4 + output LED4, + + output AA, AB, AC, AD, + output AE, AF, AG, CA ); - localparam BITS = 4; + localparam BITS = 8; localparam LOG2DELAY = 22; reg [BITS+LOG2DELAY-1:0] counter = 0; @@ -20,4 +23,41 @@ module example ( end assign {LED1, LED2, LED3, LED4} = outcnt ^ (outcnt >> 1); + + // seg7enc seg7encinst ( + // .seg({AA, AB, AC, AD, AE, AF, AG}), + // .dat(CA ? outcnt[3:0] : outcnt[7:4]) + // ); + + assign {AA, AB, AC, AD, AE, AF, AG} = ~(7'b 100_0000 >> outcnt[7:4]); + assign CA = counter[10]; +endmodule + +module seg7enc ( + input [3:0] dat, + output [6:0] seg +); + reg [6:0] seg_inv; + always @* begin + seg_inv = 0; + case (dat) + 4'h0: seg_inv = 7'b 0111111; + 4'h1: seg_inv = 7'b 0000110; + 4'h2: seg_inv = 7'b 1011011; + 4'h3: seg_inv = 7'b 1001111; + 4'h4: seg_inv = 7'b 1100110; + 4'h5: seg_inv = 7'b 1101101; + 4'h6: seg_inv = 7'b 1111101; + 4'h7: seg_inv = 7'b 0000111; + 4'h8: seg_inv = 7'b 1111111; + 4'h9: seg_inv = 7'b 1101111; + 4'hA: seg_inv = 7'b 1110111; + 4'hB: seg_inv = 7'b 1111100; + 4'hC: seg_inv = 7'b 0111001; + 4'hD: seg_inv = 7'b 1011110; + 4'hE: seg_inv = 7'b 1111001; + 4'hF: seg_inv = 7'b 1110001; + endcase + end + assign seg = ~seg_inv; endmodule |