¿ªÔÆÌåÓýI¡¯m not convinced that Direwolf is the problem. The electrical design of DINAH connects the squelch logic signal to the Volume Down pin.? For example, this gets used for the volume up and down buttons on a USB headset that uses this chip.? ? I¡¯m going to guess that the CM108 driver on Linux (raspberry Pi) doesn¡¯t support the hardware volume controls.? I should go find the linux driver and see for myself. ??I¡¯m working with someone from core audio on Windows to help me find the Widows driver and see how it handle this. ? I¡¯m curious as to why they decided to connect the squelch signal to this pin rather than one of the available GPIOs. (See the schematic). It seems reasonable to me for the driver to turn the volume down when someone probes the volume down pin. ??It has the feel of a bad electrical decision rather than a software problem. But I¡¯m willing to bet there was a good reason. Perhaps it was because early adopters re-used the logic lines available in existing headsets/Adapters? And on those boards perhaps the GPIO pins weren¡¯t accessible. But I the case of DINAH they are doing their on PCB. SO the decision could have been made differently.? Perhaps they didn¡¯t do it because the underlying software depended on this choice?? ? Does anyone know the story? ? From: [email protected] <[email protected]> On Behalf Of
Lynn Deffenbaugh via groups.io
Sent: Thursday, June 16, 2022 1:50 PM To: [email protected] Subject: Re: [DINAH] Sqelch Open attached to VOLUME DOWN in Schematic ? We're using the DINAH interface for Direwolf in an APRS appliance for the Appalachian Trail Golden Packet event in an attempt to reduce our reliance on Kenwood APRS radios (specifically the D710).? In this use, we cut a jumper in the DINAH to disconnect the volume down behavior. ? I was told that the DINAH is designed for use with AllStar repeater software, so apparently that software handles things better/differently than Direwolf. ? Lynn (D) - KJ4ERJ - Author of APRSISCE for Windows Mobile and Win32
? ? On 6/16/2022 3:36 PM, al@... wrote:
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