have successfully set up a pi2 using Seengreat RGB matrix adapter board with a Waveshare 64x32 display. I can run the demo and get images to display on the matrix. My problem is using the test-example program (I created the executable via a make from the test-example.cc source). Using this command line:
sudo ./text-example --led-rows=32 --led-cols=64 --led-slowdown-gpio=2 --led-no-hardware-pulse -f /home/pi/fonts/5x7.bdf “TEST”
prints nothing. Any input from the command line is ignored also. Have to ^C to end with nothing displayed. Is the font file possibly at fault? It was copied as is from the ./rpi-rgb-led-matrix directory.
Any help appreciated.
Thanks,
Joel
Me again. I have had Gemini create a python script to write NYC bus stop information to my 64x32 matrix. The script never has written successfully to the display, hence my playing around with the text-example program - also with no success. Gemini attempted to diagnose the problem in the script and insists that the file size of the 5x7.bdf file should be 5,549 bytes long. The 5x7.bdf file in ./rpi-rgb-led-matrix/fonts in my installation is 194,747 bytes long. Gemini insists this is wrong and offered numerous ways to get a 5,549 byte font file - non of which worked.
Is Gemini hallucinating, or is the file size a real cause of my write to matrix with this font problems?
BTW, Gemini did a nice job of creating this bus stop display when going directly to a monitor directly attached to the pi.
Ideas?
J
Thanks for that advice. The error turned out to be a simple directory permissions fix. Little by little I have gotten the display to work correctly. The debugging assistance of Gemini has been pretty astounding - putting diagnostic error messages into the code in ways that uncover root causes of bugs in the ways I would have naturally proceeded manually.