rsbohn

Turns the Adafruit ATtiny817 breakout into a Morse code output peripheral.
All registers are 16 bits.

Registers
00 Character Rate
01 Word Rate
02 Frequency
03 Duty Cycle

Busy pin

rsbohn

# SPDX-FileCopyrightText: Copyright (c) 2022 Randall Bohn (dexter)
#
# SPDX-License-Identifier: MIT
#
# View random products from Adafruit on the PyPortal
from random import randrange
from adafruit_pyportal import PyPortal

base_url = "https://adafruit.com/api/product/"
portal = PyPortal(

rsbohn

# SPDX-FileCopyrightText: Copyright (c) 2022 Randall Bohn (dexter)
#
# SPDX-License-Identifier: MIT
# A little fun in the Funhouse
import time
import board
import digitalio
import displayio
import vectorio
from adafruit_displayio_layout.layouts.grid_layout import GridLayout

rsbohn

Connect UART and SPI0 between to Pi devices.

[3v3] :: [5v]
GPIO2 [CTS] :: [5v]
GPIO3 [RTS] :: [Gnd]
GPIO4 [TXD?] :: GPIO14 [TXD*]
[Gnd] :: GPIO15 [RXD*]
GPIO17 [RTS] :: GPIO18
GPIO27 :: [Gnd]

rsbohn

# SPDX-FileCopyrightText: Copyright (c) 2022 Randall Bohn (dexter)
#
# SPDX-License-Identifier: MIT
#
# Dice Roller
# Runs on Feather Bluefruit Sense nRF52840
# faces: a 336x48 sprite sheet
import board
import time
import displayio

rsbohn

Wired to the SPI headers (plus D5)
fram metro_m4 color
Vin  5v   red
...
Gnd  Gnd  black
SCK  SCK  white
MISO MISO brown
MOSI MOSI orange
CS   D5   blue (socket-pin)
...

rsbohn

# SPDX-FileCopyrightText: Copyright (c) 2021 Randall Bohn (dexter)
#
# SPDX-License-Identifier: MIT
#
# https://en.wikipedia.org/wiki/Dual-tone_multi-frequency_signaling
import array
import math
from audiocore import RawSample

tone_row = [697, 770, 852, 942]

rsbohn

#CircuitPython2022

For the Broadcom ports I would really like to have an onboard editor. 
Something simple that would allow for stand-alone coding beyond what you can do on the REPL.

I would also like to explore the possibilities and limitations of MIDI on CircuitPython.

Dexter Starboard 2022-01-04

rsbohn

# SPDX-FileCopyrightText: Copyright (c) 2021 Randall Bohn (dexter)
#
# SPDX-License-Identifier: MIT
"""LCD Widget"""
import time
import displayio
import terminalio

CHARS = 1
ROWS = 1

rsbohn

# just add this to bubbles.py
# then call it instead of herd()

def singularity(group):
    cx = display.width//2
    cy = display.height//2
    for shape in group:
        dx =  max(1, int(math.sqrt(abs(cx-shape.x))))
        if shape.x > cx: shape.x -= dx
        else: shape.x += dx