Raspberry Pi 4 bcm2835 gpio init error

Teleman

I've installed notochord as a program on Debian linux on a Raspberry Pi 4 (no Rasp 3's available...); however, during init, I get an error:

bcm2835_init: gpio mmap failed: Cannot allocate memory

I downloaded the current bcm2835 1.62 library which has a fix for Rasp Pi 4 for gpio.

http://www.airspayce.com/mikem/bcm2835/index.html

I unzipped the tar file and put it in the notochord/lib folder, and I edited src/Chordata_gpio.h to change the include:

#include "bcm2835-1.62/src/bcm2835.h"

Then recompiled notochord:

scons -j3 debug=1

But running ./notochord still returns the init error. Is there a fix for Raspbery Pi 4?

daylanKifky

Teleman
This error should be fixed* on the last version of the notochord. Which one are you using? You can tell by running notochord -V

(*) it might print the error message, but the execution of the program should continue correctly. The GPIO usage is a deprecated functionality that will be removed on future versions