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nmigen-learning
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Implement a simple led rotation

This commit is contained in:
Peder Bergebakken Sundt 2020-08-13 20:23:04 +02:00
parent 546c081521
commit 371c623012
1 changed files with 29 additions and 2 deletions
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31
fpga/icebreaker.dg
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@ -9,8 +9,8 @@ Top = subclass Elaboratable where
elaborate = platform ~> m where with m = Module! =>
freq = int platform.default_clk_frequency
@ledr = platform.request "led_r"
@ledg = platform.request "led_g"
@ledr = platform.request "led_r" 0
@ledg = platform.request "led_g" 0
@seg7 = platform.request "seven_seg"
blinker = (Submodule$ Blinker$ freq // 3 ).out
@ -33,6 +33,33 @@ Top = subclass Elaboratable where
Comb$ Drive @seg7 (Cat seg7.segs seg7.select)
@ledr = Cat
platform.request "led_g" 4
platform.request "led_g" 2
platform.request "led_g" 3
platform.request "led_g" 1
@ledm = platform.request "led_r" 1
@btn_r = platform.request "button" 1
@btn_m = platform.request "button" 2
@btn_l = platform.request "button" 3
state = Signal 4 reset: 0b1000
Comb$ Drive @ledr state
Comb$ Drive @ledm (@btn_r | @btn_l)
When (on_rising_edge @btn_l) $ ->
Sync$ Drive state (state.rotate_left 1)
When (on_rising_edge @btn_r) $ ->
Sync$ Drive state (state.rotate_right 1)
When (on_rising_edge @btn_m) $ ->
Sync$ Drive state ~state
on_rising_edge = signal ->
prev = Signal (signal.shape!)
Sync$ Drive prev signal
~ signal.implies prev
if __name__ == "__main__" =>
plat = ICEBreakerPlatform!
plat.add_resources$ pmod.seven_seg pmod: 0 # pmod 1a