circuitpython/stmhal/autoflash

#!/bin/sh
#
# This script loops doing the following:
#   - wait for DFU device
#   - flash DFU device
#   - wait for DFU to exit
#   - wait for serial port to appear
#   - run a terminal

SERIAL=/dev/ttyACM0

while true; do
    echo "waiting for DFU device..."
    while true; do
        if lsusb | grep -q DFU; then
            break
        fi
        sleep 1s
    done

    echo "found DFU device, flashing"
    dfu-util -a 0 -D build/flash.dfu

    echo "waiting for DFU to exit..."
    while true; do
        if lsusb | grep -q DFU; then
            sleep 1s
            continue
        fi
        break
    done

    echo "waiting for $SERIAL..."
    while true; do
        if ls /dev/tty* | grep -q $SERIAL; then
            break
        fi
        sleep 1s
        continue
    done
    sleep 1s
    picocom $SERIAL
done