Unable to get this to run in Processing Python mode, works fine in Python, any suggestions

roystepp

# This is a test example for the Adafruit Trellis w/HT16K33
#
#   Designed specifically to work with the Adafruit Trellis 
#   ----> https://www.adafruit.com/products/1616
#   ----> https://www.adafruit.com/products/1611
#
#   These displays use I2C to communicate, 2 pins are required to  
#   interface
#   Adafruit invests time and resources providing this open source code, 
#   please support Adafruit and open-source hardware by purchasing 
#   products from Adafruit!
#
#   Written by Limor Fried/Ladyada for Adafruit Industries.  
#   MIT license, all text above must be included in any redistribution
#
#   Python port created by Tony DiCola (tony@tonydicola.com).

import time
import Adafruit_Trellis

# This example shows reading buttons and setting/clearing buttons in a loop
#   "momentary" mode has the LED light up only when a button is pressed
#   "latching" mode lets you turn the LED on/off when pressed
#
#   Up to 8 matrices per I2C bus can be used but this example will show 4 or 1

MOMENTARY = 0
LATCHING = 1
# Set the mode here:
MODE = LATCHING

matrix0 = Adafruit_Trellis.Adafruit_Trellis()

# uncomment the below to add 3 more matrices
#
# matrix1 = Adafruit_Trellis()
# matrix2 = Adafruit_Trellis()
# matrix3 = Adafruit_Trellis()
# you can add more matrices (up to 8 per I2C bus)

# Just one
trellis = Adafruit_Trellis.Adafruit_TrellisSet(matrix0)
# or use the below to select 4, up to 8 per I2C bus can be passed in
# trellis = Adafruit_Trellis.Adafruit_TrellisSet(matrix0, matrix1, matrix2, matrix3)

# set to however many you're working with here, up to 8 per I2C bus
NUMTRELLIS = 1

numKeys = NUMTRELLIS * 16


# Connect Trellis Vin to 5V and Ground to ground.
# Connect Trellis INT wire to a digital input (optional)
# Connect Trellis I2C SDA pin to your board's SDA line
# Connect Trellis I2C SCL pin to your board's SCL line
# All Trellises on an I2C bus share the SDA, SCL and INT pin! 
# Even 8 tiles use only 3 wires max

# Set this to the number of the I2C bus that the Trellises are attached to:
I2C_BUS = 1

# Setup
print 'Trellis Demo'

# TODO: Setup the INT input

# begin() with the I2C addresses and bus numbers of each panel in order
# I find it easiest if the addresses are in order
trellis.begin((0x70, I2C_BUS))   # only one
# trellis.begin((0x70,  I2C_BUS), (0x71, I2C_BUS), (0x72, I2C_BUS), (0x73, I2C_BUS))  # or four!

# light up all the LEDs in order
for i in range(numKeys):
    trellis.setLED(i)
    trellis.writeDisplay()
    time.sleep(0.05)
# then turn them off
for i in range(numKeys):
    trellis.clrLED(i)
    trellis.writeDisplay()
    time.sleep(0.05)

# Loop
print 'Press Ctrl-C to quit.'
while True:
    time.sleep(0.03)

    if MODE == MOMENTARY:
        # If a button was just pressed or released...
        if trellis.readSwitches():
            # go through every button
            for i in range(numKeys):
                # if it was pressed, turn it on
                if trellis.justPressed(i):
                    print 'v{0}'.format(i)
                    trellis.setLED(i)
                # if it was released, turn it off
                if trellis.justReleased(i):
                    print '^{0}'.format(i)
                    trellis.clrLED(i)
            # tell the trellis to set the LEDs we requested
            trellis.writeDisplay()

    if MODE == LATCHING:
        # If a button was just pressed or released...
        if trellis.readSwitches():
            # go through every button
            for i in range(numKeys):
                # if it was pressed...
                if trellis.justPressed(i):
                    print 'v{0}'.format(i)
                    # Alternate the LED
                    if trellis.isLED(i):
                        trellis.clrLED(i)
                    else:
                        trellis.setLED(i)
            # tell the trellis to set the LEDs we requested
            trellis.writeDisplay()

jeremydouglass

@roystepp -- specifically what error message(s) are you getting?

Keep in mind that Python mode / Processing.py:

1. uses Jython to compiles directly to JVM bytecode -- you write in Python, but you run Java bytecode that is able to hook up with the rest of the Java libraries in the Processing ecosystem.
2. can also use Python libraries as long as they do not have C dependencies. So many Python libraries will work, but not all, and a few have special Jython-specific distributions.

• http://stackoverflow.com/a/6787069/7207622
• http://www.jython.org/jythonbook/en/1.0/appendixA.html

roystepp

No error just hangs. Do I need to install Jython?

jeremydouglass

Processing Python mode (processing.py) already uses Jython, so you don't need to install anything there. Have you tried some of the python mode example sketches, and do they run? I'm guessing the problem is either of your import libraries, and that they either aren't installed or have C dependencies and thus aren't compatible -- time or Adafruit_Trellis -- but I'm not a Python mode expert, and I'm hoping somebody else in the forum will chime in.

GoToLoop

• I only know a minimum to convert Java Mode to Python Mode sketches; not much else. X_X
• import time may work, if it's already bundled in Jython.
• But import Adafruit_Trellis is hardware stuff. No chance for it to work in Jython! :-SS
• Find some corresponding Java library for it or switch to regular Python. 8-X

roystepp

is it possible to re-write arduino for processing?

GoToLoop

https://forum.Processing.org/two/discussion/9598/serial-library-with-processing-py

https://Processing.org/reference/libraries/serial/index.html