ash/Pi-Pico-ExpressionPedal2Midi
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Ashley Strahle
2021-01-30 18:27:40 +10:00
parent a45a9dbf43
commit 9a60185563
1 changed files with 7 additions and 8 deletions
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15
main.py
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@@ -11,17 +11,19 @@ exp = machine.ADC(Pin(26)) # Expression pedal device on pin 31
uart = machine.UART(1, 31250) # UART Midi device on pin 6 uart = machine.UART(1, 31250) # UART Midi device on pin 6
led = machine.Pin(25, Pin.OUT) # Pico onboard led led = machine.Pin(25, Pin.OUT) # Pico onboard led
# Expression pedal maximum and minimum
# Set these to reverse thresholds
exp_min = 65535
exp_max = 0
# Midi settings # Midi settings
midi_channel = 1 # Target midi channel to write to midi_channel = 1 # Target midi channel to write to
cc = 68 # Target Control Change number - this is for Behringer X32 Matrix 5 cc = 68 # Target Control Change number - this is for Behringer X32 Matrix 5
cc_min = 0 # Minimum desired CC output cc_min = 0 # Minimum desired CC output
cc_max = 97 # Maximum desired CC output (only want fader to go to unity gain - hence not 127) cc_max = 97 # Maximum desired CC output (only want fader to go to unity gain - hence not 127)
# Initialise variables
# Set these to reverse thresholds to enable self calibration
exp_min = 65535
exp_max = 0
exp_previous = 0
# This function translates the expression pedal value to the equivalent CC value # This function translates the expression pedal value to the equivalent CC value
def translate(exp_val): def translate(exp_val):
ret = int((((exp_val - exp_min) * (cc_max - cc_min)) / (exp_max - exp_min)) + cc_min) ret = int((((exp_val - exp_min) * (cc_max - cc_min)) / (exp_max - exp_min)) + cc_min)
@@ -29,9 +31,6 @@ def translate(exp_val):
return ret return ret
else: else:
return 0 return 0
# return int((((exp_val - exp_min) * (cc_max - cc_min)) / (exp_max - exp_min)) + cc_min)
exp_previous = 0
while True: while True:
exp_current = exp.read_u16() exp_current = exp.read_u16()