[App_rpt-users] Activate PTT pin on CM108 without asterisk

[mike at midnighteng.com]

Skyler,

You still maybe not so clear.
Just some thoughts...

Are you using app_rpt or even asterisk for the task?

You will find the answer in the source code.
It's not going to be a single simple command.
If not using app_rpt, you will need most of the source code for the device.
Basically you will be outputting a bit/byte to a address / bit-banging
once you have established the parameters for the device.

If using vox, don't forget to add a (X)ms delay between tx key to tx data
for switch activation time or you will loose beginning of the 1st frame
data.

...mike/kb8jnm


> Maybe my question is not clear: I want to know what command can be
> operated
> to make the Pin on the CM108 chip to activate?
>
> What command does Asterisk run so that it activates the PTT button on the
> USB fob?
>
> On Sat, May 9, 2015 at 8:10 AM, Corey Dean <n3fe at repeater.net> wrote:
>
>> You could just invert it using a pnp and a 10k resistor.
>>
>> Corey
>>
>> On May 9, 2015, at 9:08 AM, Skyler F <electricity440 at gmail.com> wrote:
>>
>> Is there a way to tell pin 13 on the CM108 sound card to activate High
>> vs
>> Low?
>>
>> Although this is off topic, I thought maybe people here would know:
>>
>> I want to use a USB sound FOB for APRS with XASTIR, and I want to see if
>> I
>> can use a cheap sound card instead of a TNC. If nothing else, I will
>> have
>> to use a VOX circuit, but it would be cool if I could script XASTIR to
>> tell
>> the USB card to activate high/low when it PTT's.
>>
>> If anybody has experience with XASTIR, do you know if you can even use
>> sound cards in it? Or does it have to be a TNC.
>>
>> 73,
>> Skyler
>> KDØWHB
>>
>> --
>> Skyler Fennell
>> amsatnet.info
>> KDØWHB
>> electricity440 at gmail.com
>>
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>
>
> --
> Skyler Fennell
> amsatnet.info
> KDØWHB
> electricity440 at gmail.com
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