ash/Pi-Pico-ExpressionPedal2Midi
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Ashley Strahle
2021-01-30 18:55:32 +10:00
parent 9a60185563
commit f5cfd56e6b
1 changed files with 13 additions and 8 deletions
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19
main.py
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@@ -22,11 +22,15 @@ cc_max = 97 # Maximum desired CC output (only want fader to go to unity gain - h
exp_min = 65535
exp_max = 0
exp_previous = 0
cc_previous = 0
# This function translates the expression pedal value to the equivalent CC value
def translate(exp_val):
if exp_max - exp_min > 40000:
ret = int((((exp_val - exp_min) * (cc_max - cc_min)) / (exp_max - exp_min)) + cc_min)
else:
return 0
if ret > 0:
return ret
else:
@@ -34,16 +38,17 @@ def translate(exp_val):
while True:
exp_current = exp.read_u16()
cc_current = translate(exp_current)
if exp_current > exp_max:
exp_max = exp_current
elif exp_current < exp_min:
exp_min = exp_current
if exp_current != exp_previous and exp_max - exp_min > 40000:
if cc_current != cc_previous:
led.value(1) # Turn led on
cc_val = translate(exp_current)
uart.write(ustruct.pack("bbb",ControlChange + midi_channel - 1,cc,cc_val))
uart.write(ustruct.pack("bbb",ControlChange + midi_channel - 1,cc,cc_current))
led.value(0) # Turn led off
exp_previous = exp_current
print("Writing Midi Channel: {}, ControlChange: {}, Value {}. Exp Pedal: cur: {}, min: {}, max: {}".format(midi_channel, cc, cc_val, exp_current, exp_min, exp_max))
time.sleep(0.05)
cc_previous = cc_current
print("Writing Midi Channel: {}, ControlChange: {}, Value {}. Exp Pedal: cur: {}, min: {}, max: {}".format(midi_channel, cc, cc_current, exp_current, exp_min, exp_max))
# else:
# time.sleep(0.05)