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

[ksmets]

I edited the post above, due to new user limit

I notice that when running as root, the gpio4 gets created during sudo pio run -t upload and disappears when command has finished.

[ivankravets]

@ksmets

However, my /sys/class/gpio doesn’t have 18 or 4, but:

@glynhudson is it true? You said me that GPIO 18 should be used.

[ivankravets]

@ksmets

I edited the post above, due to new user limit

Opsss. I’ve just changed your level manually. The system is very “smart”

[glynhudson]

@ivankravets

Now, sudo pio -t upload works, but pio -t upload as regular user still doesn’t.

@glynhudson I remember that you had the same problem. Have we resolved it?

No, we never fixed this. We came to the conclusion that due to Raspbian root user is needed to access GPIO. I have been living with running pio as sudo to upload. Not ideal, but IMO is not the end of the world since the emonPi is a closed system on a RaspberryPi.

The emonPi uses GPIO 4 (pin 7) as the reset.

[ivankravets]

@glynhudson

Sounds good, when is 3.0 due to be released?

Hey Would be glad for the feedback. I remember that you were interested in Library Managment.

PlatformIO CLI 3.0: Public Alpha 1

Dear @pio3-dev, We are glad to announce the first public development version of PlatformIO 3.0 and invite you to test it with your projects. New features Decentralized Development Platforms Unit Testing Library Manager 3.0 Library Dependency Finder Project Dependencies with Semantic Versioning support Installation Redirecting... Release Notes PlatformIO Plus Unit Testing for Embedded issue #408 Decentralized Development Platforms Development platform manifest “platform.json”…

[sabas1080]

Hi

I 'm trying to load firmware to an ATtiny85 with raspberry pi, it is that possible?

Thanks

[ivankravets]

It’s possible. PlatformIO works on Raspberry Pi too.

[sabas1080]

Thanks @ivankravets, the platformio.ini, would look like ?

    [env:attiny85]
    platform = atmelavr
    framework = arduino
    board = attiny85
    board_f_cpu = 1000000L
upload_port =/dev/ttyAMA0

[ivankravets]

Yes, that is the core idea of PlatformIO to work with the same project settings everywhere with the same manner.

[sabas1080]

Default use programmer “usbtiny” and I want to use “linuxspi” or GPIO

Is Possible?

[ivankravets]

Please read docs Redirecting...

You need upload_protocol.

[sabas1080]

I am try with

“upload_protocol = -P /dev/spidev0.0 -c linuxspi -b 10000”

but next error:
avrdude: Can't find programmer id "-P

Do you have any example of upload_protocol?

Thanks

[ivankravets]

What are you doing? Please read docs and examples below:

• Redirecting...

upload_protocol = linuxspi
upload_speed = 10000

and etc… See upload_flags…

[ivankravets]

See program examples Atmel AVR — PlatformIO v6.1 documentation

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

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

and use pio run -t program.

[sabas1080]

I am try with

upload_flags = -P /dev/spidev0.0
upload_protocol = linuxspi
upload_speed = 10000

I am doing programming attiny85 with Raspberry Pi, similar to

http://www.instructables.com/id/Programming-the-ATtiny85-from-Raspberry-Pi/ in the step 3

[ivankravets]

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

Run script before/after image upload?

See example Redirecting... platformio.ini [env:pre_and_post_hooks] extra_script = extra_script.py extra_script.py Import("env") def before_upload(source, target, env): print "before_upload" # do some actions def after_upload(source, target, env): print "after_upload" # do some actions env.AddPreAction("upload", before_upload) env.AddPostAction("upload", after_upload) Result ... Processing .pioenvs/uno/libFrameworkArduino.a Processing .pioenvs/uno/firmware.elf Check pro…

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.

[sabas1080]

I have the next error:

scons: *** Import of non-existent variable ''env''

[ivankravets]

Please switch to PlatformIO 3.0 Redirecting...

[sabas1080]

Done

I have the same error with programmer:

avrdude: Can't find programmer id "linuxspi"

it may be that the version of avrdude of platformio does not support this type of controller

I can use the default avrdude the raspberry ?

[ivankravets]

You need special avrdude. See instruction that you gave me:

git clone GitHub - kcuzner/avrdude: avrdude with a Linux SPI programmer type
cd avrdude/avrdude
./bootstrap && ./configure && sudo make install

Then, need to force PlatformIO use this avrdude. Please edit extra_script.py and before_upload function

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)
    env.Replace(UPLOADER="/path/to/hacked/avrdude")