Re: V23 transmitter on a pic ?

From: Paul Bealing (paul_at_pmb.co.nz)
Date: 11/16/04


Date: Tue, 16 Nov 2004 13:24:59 +1300

Robert Lacoste wrote:

> Hi guys,
>
> I need a V23 TX modem firmware running on a PIC microcontroller (75bps
> transmitter, 450/390Hz FSK). I don't need reception, just transmission, so I
> guess a PIC will largely be able to do it : A look-up table or DDS-based
> approach will be ok, but before starting to code it I just would like to
> check if someone have it already coded...
>
> Many thanks,
> Friendly yours,
> Robert
> www.alciom.com
>
> To contact us, thanks to click on the antispam link below :
> http://www.cerbermail.com/?dCSHUxvwpw
>
>
Hello

I haven't done it but I've seen PIC based alarm systems that included a
full 300bps modem with tone and dtmf (TX and RX) signaling. The one I
have here is in a 17C42 at 16MHz.

Paul Bealing
www.pmb.co.nz



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