Basic flash update script.

Detects a connected board, resets it into bootloader mode,
mounts the RPI-RP2 drive (found via blkid) and unzips the latest
release .uf2 (fetched from GitHub) to it.

Not very fault tolerant.

Requires firmware >= 0.0.5.

update.sh

@@ -0,0 +1,40 @@
+#!/bin/bash
+PRODUCT="picade-max-audio"
+FIRMWARE_VERSION=$(curl -sSL https://api.github.com/repos/pimoroni/$PRODUCT/releases/latest | grep "tag_name" | cut -d \" -f4)
+FIRMWARE_UF2="picade-max-audio.uf2"
+FIRMWARE="https://github.com/pimoroni/picade-max-audio/releases/download/$FIRMWARE_VERSION/$PRODUCT-$FIRMWARE_VERSION.zip"
+
+echo "Installing firmware: $FIRMWARE_VERSION."
+
+SERIAL_DEVICE=$(find /dev/serial/by-id -name "usb-Pimoroni_Picade_USB_Audio_*")
+DEVICE=$(blkid -L RPI-RP2)
+
+if [[ -e "$SERIAL_DEVICE" ]]; then
+    echo "Found Picade Max Audio at: $SERIAL_DEVICE"
+    echo "multiverse:_usb" > "$SERIAL_DEVICE"
+    DEVICE=""
+    START=$EPOCHSECONDS
+    while [[ -z "$DEVICE" ]]; do
+        if (( EPOCHSECONDS-START > 10 )); then
+            echo "RP2 bootloader device not found."
+            exit 1
+        fi
+        sleep 1
+        DEVICE=$(blkid -L RPI-RP2)
+    done
+    echo "Found RP2 on $DEVICE"
+    MNT_TEMP=$(mktempi -t "$PRODUCT")
+    sudo mount "$DEVICE" "$MNT_TMP" > /dev/null 2>&1
+    FW_TEMP=$(mktemp -t "$PRODUCT")
+    echo "Fetching $FIRMWARE..."
+    wget -q "$FIRMWARE" -O "$FW_TEMP"
+    echo "Installing firmware..."
+    sudo unzip "$FW_TEMP" -d "$MNT_TEMP" "$FIRMWARE_UF2"
+    rm "$FW_TEMP"
+    sync
+    sudo umount .tmp_update
+    rm -r "$MNT_TEMP"
+else
+    echo "Picade Max Audio not found?"
+    exit 1
+fi