Re: [Amforth-devel] Serial communication via a digital port?

[Erich W. <ew....@na...>]

Hello Christian,

On 11/16/2010 01:22 PM, Christian Kellermann wrote:
> Dear amforthers,
>
> I was wondering whether there is already a dictionary available
> that enables me to send a string at 9600 baud via a digital pin?

I see 2 non-software approaches:
use a controller with 2 serial interfaces, e.g. atmega644P

use a bit of stuff to multiplex the tx line to some other
connection, then use the hw usart. The sw would then do
"redirection" like this
get-data <to-other> send-data </to-other>


And I see one software approach:
use a timer/pwm thing to create the wave form,
the corresponding interrupt handlers then can provide the next
bit, set the timer registers and fire the timer again.
Downside: needs most probably be coded in assembler.


Maybe a few more words about what you want to achieve
could turn up more possible solutions.


Erich