todbot

// Simple MIDI input using MIDI Library on Pico
// 2 Mar 2023 - @todbot / Tod Kurt

#include <MIDI.h>

// Serial MIDI, could be "Serial1" or "Serial2" depending on pins on Pico
// See: https://arduino-pico.readthedocs.io/en/latest/serial.html
// and https://pico.pinout.xyz/
MIDI_CREATE_INSTANCE(HardwareSerial, Serial1, MIDIserial); 

todbot

# wire a rotary encoder to GP2,GP3, and encoder switch to GP4, with commons going to Gnd
import board
import rotaryio
import keypad
import usb_hid
from adafruit_hid.keyboard import Keyboard
from adafruit_hid.keycode import Keycode

CLK_PIN = board.GP4
DT_PIN = board.GP3

todbot

"""
beatfader_demo.py -- fade between different drum loops
10 Jun 2024 - @todbot / Tod Kurt

originally from
https://github.com/todbot/circuitpython-tricks/blob/main/larger-tricks/beatfader.py

Demonstrate how to play WAVs via PWM audio

Functions, designed for QTPy RP2040 or Xiao RP2040:

todbot

/**
 * Modified 12 Jun 2024 - @todbot -- added USB MIDI forwarding
 * originally from: https://github.com/rppicomidi/EZ_USB_MIDI_HOST/blob/main/examples/arduino/EZ_USB_MIDI_HOST_PIO_example/EZ_USB_MIDI_HOST_PIO_example.ino
 * Be sure to set "Tools / CPU Speed" to 120 MHz or 240 MHz and 
 * be sure to set "Tools / USB Stack" to "Adafruit TinyUSB" 
 */
 
 /* 
 * The MIT License (MIT)
 *

todbot

# qteye_picodvi.py - qteye.py but on a PicoDVI RP2040 board
# 19 May 2024 - @todbot, on a DJDevon3 suggestion in Discord
# 23 Oct 2022 - @todbot / Tod Kurt
# Part of https://github.com/todbot/CircuitPython_GC9A01_demos
# also see: https://twitter.com/todbot/status/1584309133263532033
#      and: https://twitter.com/todbot/status/1584309133263532033
# Copy this file as "code.py" and the two eyeball BMP files to CIRCUITPY drive
# To install needed libraries: "circup install adafruit_imageload"
#
# Video demo below as a comment to this gist

todbot

// esp32s3_i2s_simple_sine.ino
// demonstrate I2S on ESP32S3
// origally from guiguig on Discord: https://discord.com/channels/327254708534116352/422210663507558401/1240067408660795424
// video demo below in comment

#include <I2S.h>

#define BCK  16  // feather esp32s3 A2
#define DOUT 17  // feather esp32s3 A1
#define LCK  18  // feather esp32s3 A0

todbot

# raise_vs_return_code.py -- Attempt to estimate cost of exception raise vs return in CircuitPython
# 14 May 2024 - @todbot

import time
import random
import gc

num_runs = 50000

# functions that do a small amount of something but really nothing

todbot

# demonstrate odd usb.core.USBError with max3421e
# requires "adafruit_usb_host_midi_todbot" below, which adds timeout on read()s
# 12 May 2024 - @todbot
import displayio
displayio.release_displays()

import time
import board
import usb
import max3421e

todbot

# Demonstrate trying to use the USBError of usb.core.Device.read() as a
# "no bytes available" indicator. Unfortuately, it's VERY slow. 
# Or more likely, it's missing messages mid-parse. 
# 8 May 2024 - @todbot
#
# note, this requires two special libraries:
# - adafruit_usb_host_midi_hostreadhack
# - winterbloom_smolmidi_hostreadhack

import time

todbot

# waiting_for_midi_code.py -- I'm always blocking for midi
# 6 May 2024 - @todbot
# works on PicoDVI RP2040 Feather / DVI Cowbell / etc.
import time, math, random
import board
import displayio
import bitmaptools
from adafruit_display_text import bitmap_label as label

num_colors = 16  # how many colors for our bitmap, can't be over 16 for DVI