[En-Nut-Discussion] Software UART anyone?

[Erik Lins]

Hi!

> are too long for software uart. I measured this
> and I think the max theoretical bps was 4800.
> Then we gave up and we use a CPLD for this.

if an additional uart is the only thing needed additionally, it could 
be worth looking at some low-cost AVR controller, like the ATtiny2313 
(it's got a real USART!). It could be attached via I2C to the main 
controller and act like an I2C<->USART bridge. Since the slave 
controller has no Nut/OS stuff to do, additional software uart(s) could 
be performed.

Cheers,
ER!K

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LINS Technologies
http://www.lins.de