Debugging with Picprobe
picoprobe can be used for both Raspberry Pi and Pico.
There is a special hardware available from Raspberry. But if you have a spare Pico board laying around it can also be used. You only need to install the latest picoprobe.uf2 and you are ready to go.
If you have a CM4 without WLAN (or to initially enable WLAN on the CM4), you can connect to the board using serial communication.
See the below picture for how to wire the pico-probe to the CM4 on pedalboard-hw:
| RPi Pin | Picoprobe Pin | Color |
|---|---|---|
| 6 GND | 8 GND | Black |
| 8 TXD | 7 UART RX | Yellow |
| 10 RXD | 6 UART TX | Green |
After connecting the USB to the picoprobe you can to the ELK Audio OS with the following command (Mac OSX)
screen /dev/cu.usbmodem2102 57600
See the below picture for how to wire the pico-probe to the Raspberry Pico on pedalboard-hw
| Pico Pin | Picoprobe Pin | Color |
|---|---|---|
| GND | 3 GND | Black |
| SWCLK | 4 SPIO SCK | Yellow |
| SWDIO | 5 SPIO TX | Green |
After connecting the USB to the picoprobe you can use it to run Rust code (e.g. the pedalboard-midi project) directly by setting the cargo runner in .cargo/config.toml
runner = "probe-run --chip RP2040"
and then calling
cargo run