Re: ADT Pro without handshake

[Kevin <kevin@hackaday.com>]

On Friday, January 4, 2013 4:49:06 AM UTC-6, Riccardo wrote:
> > The 328 does have a UART but you are correct that is is synchronous, I have not been finding it necessary to use handshaking though, and I have never been able to use it on my //c
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> I see two way solution:
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> 1) you can utilize Arduino model with USART integrated like ATmega2561 (http://www.atmel.com/Images/doc2549.pdf)with 2 USART, and keep out 328 IC, (you should use the digital lines that are internal connect to USART not the tx rx lines of AVR this use only for synchronous mode). This is simple way but compatibility is not secure.
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> 2) You can utilize classic UART 16550 NS (http://www.ti.com/lit/ds/symlink/pc16550d.pdf) to replace 328 IC, but you must interfacing by parallel data and addressing bus whit AVR, the programming is more complicated. You don't forget that the classic UART have two mode, programming mode (set com parameters, speed etc.) and Communication mode. This way is more complicated to program but is very compatible with Apple Hardware port com. You realize a twin UARTs for com and the AVR simulated the PC host, all in a box.
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> Ric.

or I can just ignore handshaking as the adt server seems to do at present anyway