Reply by Robert Lacoste●December 4, 20042004-12-04
Thanks guys, as I only needed the transmit part of a V23 Uart (the simpler
side...) I finally coded from scratch a DDS-based FSK routine on a PIC. It
is working perfectly at 75/300/600bps.
Many thanks again for your answers,
Friendly yours,
--
Robert Lacoste
ALCIOM - The mixed signal experts
www.alciom.com
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"Torbj�rn Morka" <la6wla@hotmail.com> a �crit dans le message de news:
Ag4sd.73859$Vf.3548431@news000.worldonline.dk...
> j.b. miller wrote:
>> The easiest way is to wireup an ISA modem card to the PIC,unless you HAVE
>> to
>> use some other technology. Wiring is a snap,software is even easier. I
>> used
>> this scheme 15 years ago(argh,time flys) for some prototype remote energy
>> controllers.Nice thing is the hardware is already approved and reasonably
>> 'bullet proof'.
>>
>> Jay
>>
>>
>>
> Does that mean it is easy to use a PIC for creating a filter for SSTV use
> ? Of course with a suitable AD/DA-converter added..
>
> Torbjorn.
> (still looking for any suitable C-compiler for my TMS320c50 DSK-kit)
Reply by ●December 3, 20042004-12-03
j.b. miller wrote:
> The easiest way is to wireup an ISA modem card to the PIC,unless you HAVE to
> use some other technology. Wiring is a snap,software is even easier. I used
> this scheme 15 years ago(argh,time flys) for some prototype remote energy
> controllers.Nice thing is the hardware is already approved and reasonably
> 'bullet proof'.
>
> Jay
>
>
>
Does that mean it is easy to use a PIC for creating a filter for SSTV
use ? Of course with a suitable AD/DA-converter added..
Torbjorn.
(still looking for any suitable C-compiler for my TMS320c50 DSK-kit)
Reply by j.b. miller●November 16, 20042004-11-16
The easiest way is to wireup an ISA modem card to the PIC,unless you HAVE to
use some other technology. Wiring is a snap,software is even easier. I used
this scheme 15 years ago(argh,time flys) for some prototype remote energy
controllers.Nice thing is the hardware is already approved and reasonably
'bullet proof'.
Jay
Reply by Paul Bealing●November 15, 20042004-11-15
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
Reply by Robert Lacoste●November 15, 20042004-11-15
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