Arduino Due board

Development archive
#1

Hi guys,

I am getting started with the Arduino Due board and I can't do any input instructions. The Hello_World project works well, but if I want to use some getchar() instructions(as in the test_shell project) nothing happens. I connected my UART device to TX0 and RX0 pins and it seems like only the TX0 pin works...

Anyone knows how to make it works ??

Cheers,

Maxime

#2

Hi Maxime,

this problem is known, the reason is the (intentional) missing implementation of the uart0 driver. There is a simple workaround however:

in `tests/test_shell/main.c` change line 56 from `int result = posix_read(uart0_handler_pid, &c, 1);` to `int result = (int)getchar()`

The same works for the `examples/default`application.

I will try to provide a fix, so that these projects will work out of the box in the future...

Cheers, Hauke

#3

Hi Hauke,

Thanks for your answer,

Actually I had already tried this because I work with Peter Kietzmann and he told me to do this (You helped him for the same problem on the stm32f4discovery if I am not wrong). However "getchar()" seems not to end, I tried to print something after this instruction. I don't know if getchar() waits for an EOF that never comes or if my RX pin just does not send anything.

Cheers,   Maxime

Hauke Petersen <hauke.petersen@fu-berlin.de> a écrit :

#4

Hi Maxime,

I just prepared a PR that fixes your problems [1]. I tested it with the arduino-due, so it sould work for you.

Cheers, Hauke

[1] https://github.com/RIOT-OS/RIOT/pull/1465

#5

I am confused because it still does not work...

May be I am using the wrong tools ? As I did for stm32f4discovery, I am using pyterm to launch my "/dev/ttyUSBxxx" which is my UART device. Then I only connect it to the TX0, RX0 and GND pins.

Can you describe me what you did to make it works ? Because I have been looking for some tutorials for Arduino Due but I do not find anything very interesting...

Cheers, Maxime

Hauke Petersen <hauke.petersen@fu-berlin.de> a écrit :

#6

Hi Maxime,

for the arduino-due you actually do not need to connect any external uart-usb adapter, as the arduino already has one included. For the default project, you should be able to do the following:

cd examples/default make -B clean all make flash make term

This open a connection to the board and you should be able to talk to the shell (sending to the board only works with my patch.. -> see PR below).

Cheers, Hauke

#7

Many thanks,

It fixed my problems, now it works perfectly.

Cheers, Maxime

Hauke Petersen <hauke.petersen@fu-berlin.de> a écrit :