| .. | ||
| README.md | ||
MUX - Raspberry Pi Edition
This folder contains the necessary sources and information to build a MUX for Raspberry Pis. This mux can be used independently or with the controller.
Note : The mux needs to be configured via sources if not used with the controller.
Important Considerations
- The Raspberry Pi 4 has 5 available UARTS and we only document how to wire for UART0/1 and UART5
- The Raspberry Pi's prior to the 4 had only UART0 exposed. Please use ONLY the UART0 configuration and setup for these devices.
Hardware / BoM
| Item | Quantity | Unit Cost |
|---|---|---|
| Feather M0 Basic Proto | 1 | $19.95 |
| FeatherWing Proto | 1 | $4.95 |
| 2x20 pin IDC Box Header | 1 | $0.75 |
| GPIO Ribbon Cable for Raspberry Pi | 1 | $2.95 |
| Header Kit for Feather | 1 | $0.96 |
| I2C Non-Volatile FRAM Breakout | 2 | $9.95 |
Implementation (Incomplete)
- FRAM break out for configuration persistence
- Fall back to saved config and goes into stand alone via usb port if it's not seeing the main board
- Receive configuration over i2c
- Save configuration to FRAM
- FRAM config reading
- Ability to have USB and i2c for the UART output
- Use ring buffer @ 16k for i2c
- Send direct to USB and then add to ring buffer (always send over usb even if not used)
Implementation (Complete)
Building / Uploading
The make.ps1, build.ps1 and upload.ps1 scripts can be used to build/upload this project. These scripts call the arduino-cli commands programatically.