Logging events from AUX input

kubar6 · December 10, 2021, 9:41am

Hi,
I’m trying to log events from an aux input.
I set the BRD_PWM_COUNT to 4 and connected the input signal to pin 55 on my Pixhawk.
The input signal is trigger high, i.e normally 0 and rises to 1 (3.3 V) for about 2 miliseconds when event occurs.
How can I log those events?

tnx

geofrancis · December 10, 2021, 10:56am

Configure the pin as a button input.

kubar6 · December 10, 2021, 11:12am

Ok. can you explain how?
tnx

geofrancis · December 10, 2021, 11:12am

https://ardupilot.org/copter/docs/common-buttons.html

kubar6 · December 12, 2021, 11:28am

Hi,
@geofrancis can you please help me, I’m probably doing something wrong cause I cant see the BTN events on my logs…
Is this the correct setting:
BTN_ENABLE = 1
BTN_PIN1 = 54 (AUX5)
RC13_DZ = 0
RC13_max = 1700
RC13_min = 1500
RC13_reversed = 0
RC13_TRIM = 1000

What am I doing wrong?

geofrancis · December 12, 2021, 12:33pm

have you tried shorting the aux pin to ground with a wire to check it registers the button, its possible 2ms its too short a pulse to be registered as a button.

kubar6 · December 12, 2021, 12:44pm

yes I tried but still can’t see it on the log
It supposed to be BTN on the log? it saves the time and position when the event occurs?
BTN_FUNCT1 and BTN_OPTIONS1 is still set to 0, is it right?

geofrancis · December 12, 2021, 12:46pm

Now that you mention it, I don’t think I have ever tested with it set to 0, try setting it to 28 for relay 1.

kubar6 · December 12, 2021, 12:56pm

I tried setting BTN_FUNCT1=28 still can’t see it on the log
I’m quite a newbie on this, how should I run this script?

geofrancis · December 12, 2021, 1:03pm

is BRD_PWM_COUNT set to 4?

kubar6 · December 12, 2021, 1:08pm

BRD_PWM_COUNT is set to 2

geofrancis · December 12, 2021, 1:12pm

what is BTN_OPTIONS1 set to?

kubar6 · December 12, 2021, 1:13pm

BTN_OPTIONS1 is set to 0

geofrancis · December 12, 2021, 1:15pm

what is servo 13 function set to?

kubar6 · December 12, 2021, 1:17pm

it is set to 0
should I change it to -1 (GPIO)?

geofrancis · December 12, 2021, 1:18pm

try it but im not sure if that works in 4.1, i think that might be a 4.2 dev option only

geofrancis · December 12, 2021, 1:20pm

I just noticed, what pin are you testing? aux 5 or aux 6?

kubar6 · December 12, 2021, 1:21pm

aux5 (BTN_PIN1 = 54)

geofrancis · December 12, 2021, 1:30pm

I was just looking I don’t think using the button in will work, I just looked at the code and the button needs to be held down for at least 50ms.
What your looking for is something like the camera feedback pin, its used for getting ms level pin logging but I don’t think that is available on copter

github.com

ArduPilot/ardupilot/blob/1f1c3796c134d7e8b7cf5e90911461c3139c2cba/libraries/AP_Button/AP_Button.cpp

/*
   This program is free software: you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation, either version 3 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */


#include "AP_Button.h"

#if HAL_BUTTON_ENABLED

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kubar6 · December 12, 2021, 1:30pm

Logging events from AUX input

SERVO13_FUNCTION = -1

SERVO13_MIN = 1700

SERVO13_MAX = 1900

SERVO13_TRIM = 1000