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Yeah, replace PTT with COS in everything I wrote yesterday. That's what I actually meant.

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I don’t understand. Looking at the schematic for DINAH, VOLDN isn’t connected to PTT, it is connected to COS.? ??PTT is connected to GPIO3 (PIN 13).? It is COS that is connected to VOLDN.? Please correct me if I’m wrong.? But based on the schematic here: ? it is the COS that is triggering volume down on Windows.

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But it sound like if we can get some of these software packages to support configuration for COS we could at least provide jumper configuration for DINAH to get it off using COS on VOLDN.

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I’ll have a look at ASL/HamVoIP’s SimpleUSB.? ?Do you know where the source is at so I can have a look at what it would take to make it configurable?

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From: [email protected] <[email protected]> On Behalf Of Patrick Perdue via groups.io
Sent: Thursday, June 16, 2022 5:47 PM
To: [email protected]
Subject: Re: [DINAH] Sqelch Open attached to VOLUME DOWN in Schematic

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That's the only properly supported way Allstarlink/HamVoIP's SimpleUSB driver does PTT. The DINAH and other interfaces like it just converts that to essentially a continuous volume down press. I understand Direwolf has a configuration option to support this method of PTT as well, though it didn't used to. Even echolink on Windows now supports this keying method, I believe, with URI support, though I don't know how it gets around turning the output volume down at the same time if it does.

You can use an unmodified fob from a MPOW 071 USB headset on Linux with ASL/HamVoIP's SimpleUSB as a radio-less node configuration to test this. Volume down is momentary PTT.

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On 6/16/2022 3:36 PM, al@... wrote:

So I'm hitting the standard problem in Windows that Pin6 of the DIN is connected to the VOLDN pin on the CM119B in DINAH. This results in the volume being turned down every time the squelch opens on the radio.??

So here is the question:? Why didn't DINAH use one of the available GPIO pins instead of VOLDN?? Is it because the software that is typically used with DINAH doesn't support that?

I'd love to use DINAH on Windows.? I'm perfectly happy to update the client software to support a GPIO in open source projects.? I'm an embedded software developer, and I've recently re-joined the Windows team at Microsoft As well.? So I'd be pleased to help fix this... But I'll need a bit more information on what drove that electrical decision in the schematic. And I'll need to know the key pieces of software that DINAH is targeting.? I'm aware of DireWolf, but what else?

Alan Ludwig
N7JTI -- and Packet user as well as:
Principal Software Development Engineer?
Device Security Team
Enterprise and Security?
Microsoft