Okay my final follow up is that I followed the instructions listed from the above link, and I am still getting all 0s even when I have raspivid running.HermannSW wrote: ↑Tue Oct 29, 2019 1:33 pmhttps://pinout.xyz/#
BCM16 is pin 36.
If you don't see sync pulses, please use raspivid instead of picamera.
Here you can see a test procedure that does work even without a logic analyzer:
https://www.raspberrypi.org/forums/view ... 0#p1512529
Logic analyzer is preferrable as it eg. uncovers that raspivid does the first frames with preview framerate (40fps) and only later switches to framerate configured with "-fps" ...
Here are my most recent steps for trying to get this hardware camera sync working:
1. Ran raspi-gpio get, and saw that from BANK1 GPIO 29 is an output pin that doesn't have a specific function listed besides output. In the device tree however, I did see a comment that it is for a GREEN LED, which might be a problem but I tried it anyway.
2. Changed my dt-blob.dts file so that under the 3bplus section (since I'm using the Raspberry Pi 3 Model B+) under the CAMERA_0_LED section to instead have "internal" and the pin number be 29. I made sure that pin 29 was set to "output" and "no_pulling" above.
3. Next I ran these lines at the terminal
---------------"while true; do gpio -g read 29; done", which showed always 0
---------------"raspivid -md 7 -t 0 -w 640 -h 480 -fps 25 -b 1200000 -p 0,0,640,480 & " in background (I also tried other variation of this command, such as not specifying a fps or b or p, still to no avail)
----------------"while true; do gpio -g read 29; done" then still showed all 0s
4. Double checked that in my config.txt file it says "disable_camera_led = 3"
Is there something I'm missing?
If anyone has input or can help in any way with troubleshooting I would really appreciate it. I feel like I'm so close.
Thank you all.