On Thu, Oct 29, 2020 at 05:42:58PM -0300, Alan Carvalho de Assis wrote:
> Hello,
>
> On 10/29/20, Bernd Walter <ti...@cicely7.cicely.de> wrote:
> > On Thu, Oct 29, 2020 at 08:51:13AM -0300, Alan Carvalho de Assis wrote:
> >> Hi Bernd,
> >>
> >> It was "working" few mont ago. I put working covered by quotes because
> >> the ADC convertion wasn't linear. I think the calibration process was
> >> failing.
> >
> > arch/arm/src/samd2l2/sam_adc.h was previously named
> > arch/arm/src/samd2l2/adc.h
> > With the rename the protector define was updated to be identic to the one
> > in arch/arm/src/samd2l2/sam_adc.h
> > https://github.com/apache/incubator-nuttx/commit/6bff1f4df4ae3e4fc21d7d98afdbfdcc855a6ed2
> >
> > No idea what the convention for the fix would be, beside not using the same
> > protector name.
> >
>
> Well, the sam_adc.h appears correct and the #ifdef protection appears
> correct too.
It is correct by itself, but not in the bigger context:
arch/arm/include/samd2l2/sam_adc.c:
...
#include <arch/chip/sam_adc.h>
...
#include "sam_adc.h"
Both included files have the same filename and use the same #define to protect.
The first gets included and the content of the second is then missing.
>
> >> I tested it on Arduino Zero board (SAMD21).
> >
> > Ok - I do have an Arduino Zero board to test on.
> > The second problem is puzzling me.
> > For my board code I copied boards/arm/samd2l2/arduino-m0/src/sam_adc.c
> > It calls adc_register with "/dev/adc0", which calls register_driver),
> > in which inode_reserve() then fails with EEXIST.
> > This is common code for all platforms, which fails.
> >
>
> The EEXIST error means that the file already exist and then probably
> the ADC was registers twice. Maybe sam_adc_setup() was called twice or
> it is called once but adc_register("/dev/adc0") is called from other
> place.
Thanks you for the hints.
Chaning the path didn't work, but did no further tests today.
> Try to enable CONFIG_DEBUG_ANALOG_INFO and see if it will give you some hints.
>
> BR,
>
> Alan
--
B.Walter <be...@bwct.de> http://www.bwct.de
Modbus/TCP Ethernet I/O Baugruppen, ARM basierte FreeBSD Rechner uvm.
