Alt Fucntion on GPIO

[neil-benn]

Hello,

Is there a way to set the alt function of a gpio from within diozero? I'm trying to keep within diozero as much as possible without resorting to calling system functions.

Cheers,

Neil

[mattjlewis]

Hi Neil, this would be a great feature enhancement. In the short term I could very easily extend the low-level API here to allow this. At the moment it only supports setting to digital input / output and PWM. It would be trivial to extend this class to add a method that allows any mode to be set on the assumption that the caller is responsible for specifying a valid mode.

Something like: public void setMode(int gpio, int mode);

To invoke, you would need to get the MmapGpioInterface from the BoardInfo instance via the createMmapGpio operation. There is an example here: https://github.com/mattjlewis/diozero/blob/main/diozero-sampleapps/src/main/java/com/diozero/sampleapps/perf/MmapGpioPerfTest.java#L60

[neil-benn]

Hello,

Thanks; I'll take a look at it - struggling with trying to get a dd equivalent working on win 1- at the moment. It used to work but now brings down PowerShell - grr!!

Cheers,

Neil

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From: Matthew Lewis @.> Sent: 10 March 2022 14:39 To: mattjlewis/diozero @.> Cc: Neil Benn @.>; Author @.> Subject: Re: [mattjlewis/diozero] Alt Fucntion on GPIO (Issue #90)

Hi Neil, this would be a great feature enhancement. In the short term I could very easily extend the low-level API herehttps://github.com/mattjlewis/diozero/blob/main/diozero-core/src/main/java/com/diozero/internal/board/raspberrypi/RaspberryPiMmapGpio.java#L231 to allow this. At the moment it only supports setting to digital input / output and PWM. It would be trivial to extend this class to add a method that allows any mode to be set on the assumption that the caller is responsible for specifying a valid mode.

Something like: public void setMode(int gpio, int mode);

To invoke, you would need to get the MmapGpioInterface from the BoardInfo instance via the createMmapGpio operation. There is an example here: https://github.com/mattjlewis/diozero/blob/main/diozero-sampleapps/src/main/java/com/diozero/sampleapps/perf/MmapGpioPerfTest.java#L60

— Reply to this email directly, view it on GitHubhttps://github.com/mattjlewis/diozero/issues/90#issuecomment-1064133223, or unsubscribehttps://github.com/notifications/unsubscribe-auth/ADY2NXSTC2S3W6VQNVSKE23U7ICRTANCNFSM5QML2N5A. Triage notifications on the go with GitHub Mobile for iOShttps://apps.apple.com/app/apple-store/id1477376905?ct=notification-email&mt=8&pt=524675 or Androidhttps://play.google.com/store/apps/details?id=com.github.android&referrer=utm_campaign%3Dnotification-email%26utm_medium%3Demail%26utm_source%3Dgithub. You are receiving this because you authored the thread.Message ID: @.***>

[mattjlewis]

Taking another look at this and I can see that getMode is actually fairly comprehensive. It should just be a matter of doing the equivalent in the setMode method.

[mattjlewis]

Feature added to 1.3.4

[neil-benn]

Great thanks - I'll wrap this into our app code and update to test. It'll be a few weeks as I'm off for a couple of weeks.

Get Outlook for Androidhttps://aka.ms/AAb9ysg

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From: Matthew Lewis @.> Sent: Wednesday, August 17, 2022 8:38:44 PM To: mattjlewis/diozero @.> Cc: Neil Benn @.>; Author @.> Subject: Re: [mattjlewis/diozero] Alt Fucntion on GPIO (Issue #90)

Feature added to 1.3.4

— Reply to this email directly, view it on GitHubhttps://github.com/mattjlewis/diozero/issues/90#issuecomment-1218415878, or unsubscribehttps://github.com/notifications/unsubscribe-auth/ADY2NXXTOSTQISZM2KLAX53VZU5UJANCNFSM5QML2N5A. You are receiving this because you authored the thread.Message ID: @.***>