Error compiling for --fqbn arduino:avr:mega (missing cpu flags)

[FernandoGarcia]

Hi!

I have successfully installed Go compiler and Arduino CLI using this steps:

wget https://dl.google.com/go/go1.11.linux-armv6l.tar.gz

sudo tar -C /usr/local -xvf go1.11.linux-armv6l.tar.gz

cat >> ~/.bashrc << 'EOF'

export GOPATH=$HOME/go

export PATH=/usr/local/go/bin:$PATH:$GOPATH/bin

EOF

source ~/.bashrc

go version

result: go1.11 linux/arm

Then:

go get -u github.com/arduino/arduino-cli

Now following the https://github.com/arduino/arduino-cli#getting-started starts the problems.

arduino-cli sketch new MyFirstSketch

Returns:

 Error: mkdir /home/pi/Arduino/MyFirstSketch: permission denied
Could not create sketch directory.

So I tried using sudo the result is:

sudo: arduino-cli: command not found

To try solved this issue I have created the folder manually using

sudo mkdir -p /home/pi/Arduino/MyFirstSketch

On next step I could not download package_index.json due permissions error again.

So I did:

sudo mkdir -p /home/pi/.arduino15/

cd /home/pi/.arduino15/

wget https://downloads.arduino.cc/packages/package_index.json

After I have successfully installed AVR core using:

arduino-cli core install arduino:avr

The result for arduino-cli core list is:

ID Installed Latest Name
arduino:avr 1.6.21 1.6.21 Arduino AVR Boards

Now using arduino-cli board list the result is always:

FQBN Port ID Board Name
/dev/ttyUSB0 0403:6001 unknown

In this point I don't know what to do to go on since the CLI doesn't find a FQBN to my Arduino mega connected to USB port.

Can someone help please?

Best regards.

[FernandoGarcia]

I don't know if it helps but the output for lsusb is:

Bus 001 Device 004: ID 0403:6001 Future Technology Devices International, Ltd FT232 USB-Serial (UART) IC

So I'm not using Arduino drivers.

[mastrolinux]

From what I see the board is discovered and you can use it by passing the right core during compilation. /dev/ttyUSB0 0403:6001 you get unknown board because the board does not seem to be original so vid and pid are not matching the standard Arduino Mega values.

[FernandoGarcia]

Hi!

Thanks for your reply.

But what's the right value for Arduino Mega 2560 in this line for the argument --fqbn:

arduino-cli compile --fqbn arduino:samd:mkr1000 Arduino/MyFirstSketch

arduino:avr:mega2560 by example?

Best regards.

[FernandoGarcia]

Tried arduino-cli compile --fqbn arduino:avr:mega2560 Arduino/MyFirstSketch but the result is:

Error: Error resolving FQBN: board arduino:avr@1.6.21:mega2560 not found

It should be only arduino-cli compile --fqbn arduino:avr:mega Arduino/MyFirstSketch

[FernandoGarcia]

For arduino-cli compile --fqbn arduino:avr:mega Arduino/MyFirstSketch

The result is:

avr-g++: error: missing device or architecture after '-mmcu='
Error: exit status 1
Compilation failed.

[sandeepmistry]

@FernandoGarcia please try:

arduino-cli compile --fqbn arduino:avr:mega:cpu=atmega2560 Arduino/MyFirstSketch

Since the Mega has additional options (see Java IDE menu options for it), the FQBN needs the cpu type specified.

[FernandoGarcia]

Thanks for your reply.

The settings are right now but I have permissions problem again.

arduino-cli compile --fqbn arduino:avr:mega:cpu=atmega2560 Arduino/MyFirstSketch

Build options changed, rebuilding all
Sketch uses 1462 bytes (0%) of program storage space. Maximum is 253952 bytes.
Global variables use 9 bytes (0%) of dynamic memory, leaving 8183 bytes for local variables. Maximum is 8192 bytes.
Error: open Arduino/MyFirstSketch/MyFirstSketch.arduino.avr.mega.cpu=atmega2560.hex: permission denied
Error copying output file.

sudo arduino-cli compile --fqbn arduino:avr:mega:cpu=atmega2560 Arduino/MyFirstSketch

sudo: arduino-cli: command not found

[FernandoGarcia]

It worked now I had to make:

sudo chown -R pi:pi Arduino

I don't know why I had this permissions problem since the first command in Arduino CLI.

arduino-cli sketch new MyFirstSketch

A problem I had was pointed in #6 also.

I'll close this issue for now.
Thanks for all.