For my project work at the university, I have used the as described in the blog post
described in the blog post. It works very well so far, I use the synchronisation of the boards via the GPIOs. The camera system is supposed to record the gait cycle of a human being in order to compare the data of a pressure sensor shoe sole with the camera images. However, the given c-programme only triggers a photo. My goal is to take several pictures per second to map the gait cycle well. If I change the arguments in the raspistill command as follows:
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execl("/usr/bin/raspistill","/usr/bin/raspistill", "-s", "-t","1000","-tl","0", "-3d", "sbs", "w", "5184", "-h","1944","-o", pattern, NULL);
and then run de c file, 3fps is recorded.
Unfortunately, the problem arises that I can no longer trigger the cameras in the terminal, although -Photo STDIN !\n"- is printed, no new photos are triggered, the same problem when triggering the photos using the Python file for synchronisation.
I guess it's because of the GPIOs, but I don't know enough about them to modify the script accordingly.
I also replaced the raspistill command with the raspivid command, with the aim of recording synchronised videos. But the same problems occur.
Maybe someone who knows the system better can help me. Thanks in advance
The c-code as file here: https://stereopi.com/sites/default/file ... opi_sync.c
The py-code as file here:
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#!/usr/bin/env python3 # Import libraries import RPi.GPIO as GPIO # Config pin_notation = GPIO.BCM trigger_pin = 4 # Setup GPIO.setmode(pin_notation) GPIO.setup(trigger_pin, GPIO.IN) # Trigger pin GPIO.setup(trigger_pin, GPIO.OUT) GPIO.output(trigger_pin, GPIO.LOW) GPIO.setup(trigger_pin, GPIO.IN) # Cleanup at exit GPIO.cleanup()