Running MCC 128 with a BananaPi M2 Zero about daqhats HOT 8 CLOSED

@bgruberg have a look at

• https://github.com/bearsh/daqhats/tree/libgpiod
• https://github.com/bearsh/daqhats/tree/generic

in the first branch, usage of libgpiod is possible instead of rpi specific memory mapped IOs. in the second branch (which simply continuous the first), eeprom handling can be done by a tool called eeprog. furthermore, makefiles of the examples have been converted to link against libgpiod (this part can be improved probably)

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The daqhats are only supported on Raspberry Pi hardware and Raspberry Pi OS. The library uses low-level calls directly to the Broadcom IO interface hardware (thus the reliance on bcm_host.h) that would have to be ported to another processor.

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I have this library running on a iMX8 board. So it's definitely possible... I replace the boardcom lowlevel interface with gpiod, so that it will work on almost every board.

If @nwright-mcc is interested in such a solution, I may create a pull request...

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@bearsh would you mind sharing your Git repository with me so I can take a look at some of the changes you made to make this work?

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@bearsh Thanks for sharing the links to your repositories. What OS were you using to run this? I am trying to get this to run on Armbian.

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@bearsh During the installation I get the following error:

gpio.c:18:10: fatal error: bcm_host.h: No such file or directory
18 | #include "bcm_host.h"

Which seems to be a file associated with librasperberrypi-dev and raspberry-kernel-headers which seem to be Rasbian specific files. How did you get around this?

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@bgruberg, you need to enable libgpiod and you alos need to define the pins. something like the following should work but you need to adjust the IO definitions. the first number is the gpiochip, the second the pin on that chip.

make GPIOD=1 EXTRA_CFLAGS="-DGENERIC_HAT -DADDR0_GPIO=0,19 -DADDR1_GPIO=0,16 -DADDR2_GPIO=0,22 -DRESET_GPIO=0,13 -DIRQ_GPIO=4,1 -DIRQ_IOEXP_GPIO=4,2" -C lib all

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