bcm283x: Issue 62 Change bcm283x to use ioctl for GPIO pins, not sysfs.

[gsexton]

This fixes Edge detection does not work on Raspbian Bookworm #62

It changes the bcm283x/gpio.go to use gpioioctl rather than sysfs.

With this patch, obtaining GPIO pins via:

      outPin:=gpioreg.ByName("GPIO2")
      inPin:=gpioreg.ByName("GPIO10")

or
        outPin:=rpi.P1_3
        inPin:=rpi.P1_19

now work as expected.

[codecov-commenter]

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Codecov Report

Attention: Patch coverage is 34.72222% with 94 lines in your changes missing coverage. Please review.

Project coverage is 27.4%. Comparing base (7540d26) to head (5005af9).

Files with missing lines	Patch %	Lines
gpioioctl/gpio.go	18.6%	48 Missing ⚠️
bcm283x/gpio.go	34.4%	20 Missing and 1 partial ⚠️
gpioioctl/ioctl.go	0.0%	6 Missing ⚠️
gpioioctl/syscall.go	0.0%	6 Missing ⚠️
gpioioctl/syscall_other.go	0.0%	6 Missing ⚠️
gpioioctl/dummy.go	82.8%	4 Missing and 1 partial ⚠️
gpioioctl/lineset.go	0.0%	2 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##            main     #63     +/-   ##
=======================================
+ Coverage   26.8%   27.4%   +0.5%     
=======================================
  Files         92      96      +4     
  Lines      11548   11774    +226     
=======================================
+ Hits        3097    3221    +124     
- Misses      8316    8418    +102     
  Partials     135     135             

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[gsexton]

@maruel can you give me an idea of how to fix this?

periph.io/x/host/v3/bcm283x

Error: bcm283x/gpio.go:199:22: undefined: gpioioctl.GPIOLine
Error: bcm283x/gpio.go:1334:19: undefined: gpioioctl.Chips
Error: bcm283x/gpio.go:1378:21: undefined: gpioioctl.Chips

[gsexton]

@maruel can you give me an idea of how to fix this?

periph.io/x/host/v3/bcm283x

Error: bcm283x/gpio.go:199:22: undefined: gpioioctl.GPIOLine Error: bcm283x/gpio.go:1334:19: undefined: gpioioctl.Chips Error: bcm283x/gpio.go:1378:21: undefined: gpioioctl.Chips

NM, I see the problem. gpioioctl doesn't exist for Windows/MacOS, and that's messing with it.

[maruel]

The stance periph.io takes is that the code is compilable on all platforms so users can read the documentation, e.g. in VSCode while on Windows but functionality that do not make sense (e.g. bcm238x on Windows) is okay to not work.

[maruel]

Thanks!