Tod Kurt todbot

Raspberry Pi Pico PIO 8 Pin UART TX

This code creates a UART TX on 8 sequential pins of the Raspberry Pi Pico. The main use case being MIDI splitter devices

The second 16 port implementation should work for any number of pins, but just acts as a pure copy to those pins instead of having individual control over every pin of every byte. Hence while less flexible, the controlling software is simpler (just send a uart byte and it's copied to every pin).

Only tested in the simulator so far. https://wokwi.com/projects/344345628967436882

Used https://wokwi.com/tools/pioasm to go from uart_tx.pio.h to uart_tx.h

Running Linux and Windows on M1 with QEMU

30.11.2020: Updated with the new patchseries and instructions for Windows

02.12.2020: Added tweaks

08.12.2020: Updated with patchseries v4

31.01.2020: Updated with patchseries v6

	import ulab.numpy as np
	import random
	import synthio

	SAMPLE_SIZE = 200
	sinwave1 = np.array(np.sin(np.linspace(0, 2np.pi, SAMPLE_SIZE, endpoint=False)) 32767, dtype=np.int16)
	sinwave2 = np.array(np.sin(np.linspace(np.pi/2, 2.5np.pi, SAMPLE_SIZE, endpoint=False)) 32767, dtype=np.int16)
	downwave = np.linspace(32767, -32767, num=3, dtype=np.int16)

	noisewave = np.array([random.randint(-32767, 32767) for i in range(SAMPLE_SIZE)], dtype=np.int16)

	# SPDX-FileCopyrightText: 2023 anecdata
	#
	# SPDX-License-Identifier: MIT

	import time
	import traceback
	import supervisor
	import os
	import rtc
	import espnow

	import gc
	import time
	import board
	import digitalio
	import supervisor
	import random

	import wifi
	import espidf
	import ipaddress

	import time
	import board
	import rotaryio
	import touchio
	import digitalio
	import usb_hid
	from adafruit_hid.keyboard import Keyboard
	from adafruit_hid.keyboard_layout_us import KeyboardLayoutUS
	from adafruit_hid.keycode import Keycode
	from adafruit_hid.consumer_control import ConsumerControl

	# qtpy-knob-midi.py -- Mount a rotary encoder directly to an Adafruit QT Py,
	# use it for midi CC message
	#
	# 2020 @todbot / Tod Kurt
	# 2021 @David.Glaude / David Glaude

	import time
	import board
	from digitalio import DigitalInOut, Direction, Pull
	import rotaryio

	import board
	import time
	from digitalio import DigitalInOut,Pull

	led = DigitalInOut(board.LED)
	led.switch_to_output()

	safe = DigitalInOut(board.GP14) # <----- choose your pin with a button on it
	safe.switch_to_input(Pull.UP)

	#
	# wifi-preferred-network.py -- Given a list of preferred networks,
	# connect to the one with the strongest signal
	# for CircuitPython ESP32S2 Metro / MagTag
	# 2020 @todbot / todbot.com/blog

	import time
	import wifi
	from secrets import secrets

	// modeled after https://github.com/todbot/qtpy-tricks#fire-simulation-on-external-neopixel-strip
	// must use latest FastLED checkout from https://github.com/FastLED/FastLED
	// as FastLED 3.3.3 doesn't have QT Py support
	#include "FastLED.h"
	#define LED_PIN 0
	#define NUM_LEDS 8

	CRGB leds[NUM_LEDS];

	void setup() {