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Porting

TinyUSB is designed to be a universal USB protocol stack for low-cost 32 bit microcontrollers. It handles most of the high level USB protocol and relies on the microcontroller's USB peripheral for data transactions on different endpoints. Porting is the process of adding low-level support for the rest of the common stack. Once the low-level is implemented, it is very easy to add USB support for the microcontroller to other projects, especially those already using TinyUSB such as CircuitPython.

Below are instructions on how to get the cdc_msc_hid device example running on a new microcontroller. Doing so includes adding the common code necessary for other uses while minimizing other extra code. Whenever you see a phrase or word in <> it should be replaced.

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meta:
  id: intellikeys
  file-extension: intellikeys
seq:
  - id: reports
    type: report
    repeat: eos
types:
  report:
    seq:

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meta:
  id: usb_hid
  file-extension: usb_hid
  bit-endian: le
  endian: le
seq:
  - id: items
    type: item
    repeat: eos
enums:

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meta:
  id: usb_descriptors
  endian: le
  bit-endian: le
seq:
  - id: descriptor
    type: usb_descriptor
    repeat: eos
enums:
  descriptor_type:

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meta:
  id: fnt
  file-extension: fnt
  endian: le
  bit-endian: le
seq:
  - id: df_version
    type: u2
  - id: df_size
    type: u4

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from elftools.dwarf.descriptions import describe_form_class
from elftools.elf.elffile import ELFFile
import sys
import json
import pathlib

std_to_type = {
    "uint8_t": ("B", "int"),

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class Filter:
    def __init__(self, address: int, *, extended: bool = False, mask: Optional[int] = None):
        """Construct a CanFilter with the given properties.

        If mask is not None, then the filter is for any sender which matches all
        the nonzero bits in mask.  Otherwise, it matches exactly the given address.

        If extended is true then only extended addresses are matched, otherwise
        only standard addresses are matched.
        """

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# Example of using the Adafruit IO CircuitPython MQTT client
# to subscribe to an Adafruit IO feed and publish random data
# to be received by the feed.
#
# Example by Tony DiCola for Adafruit Industries
# Modified by Brent Rubell for Adafruit Industries, 2019
import time
from random import randint

from pimoroni_pms5003 import PMS5003

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ESP-ROM:esp32s2-rc4-20191025
Build:Oct 25 2019
rst:0x1 (POWERON),boot:0x8 (SPI_FAST_FLASH_BOOT)
SPIWP:0xee
mode:DIO, clock div:2
load:0x3ffe8100,len:0x4
load:0x3ffe8104,len:0x1914
load:0x40050000,len:0x14cc
load:0x40054000,len:0x210c
entry 0x400502e0

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AutoSunglasses/code.py
18:from adafruit_circuitplayground.express import cpx

FruitBox_Sequencer/main.py
7:from adafruit_circuitplayground.express import cpx

Sensor_Plotting_With_Mu_CircuitPython/soil_moisture.py
2:from adafruit_circuitplayground.express import cpx

Sound_Reactive_Ears/code.py