Uploading to AVR using Raspberry Pi GPIO (avrdude GPIO reset)

FAQ
37

Try this

[env:attiny85]
platform = atmelavr
framework = arduino
board = attiny85
board_mcu = t85
board_f_cpu = 1000000
upload_flags = -P$UPLOAD_PORT

upload_protocol = linuxspi
upload_speed = 10000
upload_port = /dev/spidev0.0
extra_script = extra_script.py

However, that is not enough. You need to make software reset. See

sudo gpio -g mode 22 out
sudo gpio -g write 22 0

We have this software reset on other pins for raspduino and emonpi. Nevertheless, you can write custom extra_script and 2 hooks. Do you familiar with Python?

See my answer here

extra_script.py

Place it on the same level as platformio.ini

Import("env")

def _rpi_sysgpio(path, value):
    with open(path, "w") as f:
        f.write(str(value))

def before_upload(source, target, env):
    _rpi_sysgpio("/sys/class/gpio/export", 22)
    _rpi_sysgpio("/sys/class/gpio/gpio22/direction", "out")
    _rpi_sysgpio("/sys/class/gpio/gpio22value", 0)


def after_upload(source, target, env):
    _rpi_sysgpio("/sys/class/gpio/gpio22/direction", "out")
    _rpi_sysgpio("/sys/class/gpio/gpio22value", 1)

env.AddPreAction("program", before_upload)
env.AddPostAction("program", after_upload)

P.S: Need to run with sudo. RPi requires it.