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

[glynhudson]

Done: emonPi manifest PR:

add emonpi board manifest

I have not been able to test this custom board since I seem to encounter an error while adding any custom board, I created a new topic:

Error adding custom board

I’m testing the custom board feature following the docs: http://docs.platformio.org/en/latest/platforms/creating_board.html Create boards folder in `~/.platformio’ create my_own_board.json with example json: { "myboard": { "build": {}, "frameworks": ["%LIST_WITH_SUPPORTED_FRAMEWORKS%"], "name": "My test board", "platform": "%PLATFORM_TYPE_HERE%", "upload": {}, "url": "http://example.com", "vendor": "My Company Ltd." } } When I …

I have also added the corresponding entry for GPIO4 / pin7 reset:

add emonpi GPIO reset on GPIO4 / pin7

I have just tried to test GPIO and I’m having permissions error

scons: *** [upload] /sys/class/gpio/gpio18/direction: Permission denied

I’m not sure why there is a permissions error since I can successfully control the GPIO using non root commands (pi user) bash e.g.

   echo 4 >  /sys/class/gpio/export
   echo out > /sys/class/gpio/gpio4/direction 
   echo 1 > /sys/class/gpio/gpio4/value 
   echo 0 > /sys/class/gpio/gpio4/value 
   echo 4 >  /sys/class/gpio/unexport 

Does platformio run as pi user on a RaspberryPi? If not I will need to add platformio to the gpio user group.