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https://github.com/sekigon-gonnoc/Pico-PIO-USB
USB host/device implementation using PIO of raspberry pi pico (RP2040).
https://github.com/sekigon-gonnoc/Pico-PIO-USB
Last synced: about 1 month ago
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USB host/device implementation using PIO of raspberry pi pico (RP2040).
- Host: GitHub
- URL: https://github.com/sekigon-gonnoc/Pico-PIO-USB
- Owner: sekigon-gonnoc
- License: mit
- Created: 2021-12-18T01:49:36.000Z (over 2 years ago)
- Default Branch: main
- Last Pushed: 2024-01-24T17:19:07.000Z (5 months ago)
- Last Synced: 2024-02-15T22:33:32.231Z (4 months ago)
- Language: C
- Homepage:
- Size: 205 KB
- Stars: 1,108
- Watchers: 41
- Forks: 112
- Open Issues: 26
-
Metadata Files:
- Readme: README.md
- License: LICENSE
Lists
- awesome-stars - sekigon-gonnoc/Pico-PIO-USB - USB host/device implementation using PIO of raspberry pi pico (RP2040). (C)
- awesome-stars - Pico-PIO-USB - gonnoc | 657 | (C)
- awesome-stars - sekigon-gonnoc/Pico-PIO-USB - USB host/device implementation using PIO of raspberry pi pico (RP2040). (C)
README
# Pico-PIO-USB
USB host/device implementation using PIO of raspberry pi pico (RP2040).
You can add additional USB port to RP2040.
## Demo
https://user-images.githubusercontent.com/43873124/146642806-bdf34af6-4342-4a95-bfca-229cdc4bdca2.mp4
## Project status
|Planned Features|Status|
|-|-|
|FS Host|✔|
|LS Host|✔|
|Hub support|✔|
|Multi port|✔|
|FS Device|✔|## Examples
- [capture_hid_report.c](examples/capture_hid_report/capture_hid_report.c) is a USB host sample program which print HID reports received from device. Open serial port and connect devices to pico. Default D+/D- is gp0/gp1. Call `pio_usb_add_port()` to use additional ports.
- [usb_device.c](examples/usb_device/usb_device.c) is a HID USB FS device sample which moves mouse cursor every 0.5s. External 1.5kohm pull-up register is necessary to D+ pin (Default is gp0).
- [host_hid_to_device_cdc.c](examples/host_hid_to_device_cdc/host_hid_to_device_cdc.c) is similar to **capture_hid_report.c** which print mouse/keyboard report from host port to device port's cdc. TinyUSB is used to manage both device (native usb) and host (pio usb) stack.```bash
cd examples
mkdir build
cd build
cmake ..
make
# Copy UF2 file in capture_hid_report/ or usbdevice/ to RPiPico
```Another sample program for split keyboard with QMK
[https://github.com/sekigon-gonnoc/qmk_firmware/tree/rp2040/keyboards/pico_pico_usb](https://github.com/sekigon-gonnoc/qmk_firmware/tree/rp2040/keyboards/pico_pico_usb)
## Resource Usage
- Two PIO
- One PIO is for USB transmitter using 22 instruction and one state machine
- Another PIO is for USB receiver using 31 instruction and two state machine
- Two GPIO for D+/D- (Series 22ohm resitors are better)
- 15KB ROM and RAM
- (For Host) One 1ms repeating timer
- (For Device) One PIO IRQ for receiver