extended serial communication

[hesinije]

Hi all,

For an application I need serial communication at 2400 baud with 8 bits + 2 stop bits or, equivalent, 9 bits + 1 stop bit. The Picaxe can only communicate with 8 bits + 1 stop bit. So I think an external hardware solution has to be made.
Has anyone some experience on using an external (simple) UART with Picaxe? Is it possible to use a Maxim MAX3100 SPI UART or is the Picaxe (16 MHz) to slow for this? Or is there a simple parallel in serial out UART? Or what is possible with shift registers? Any suggestion welcome. (I don't like to use my Motorola micro controllers for this.)

Thanks,
Herman, NL

 

[d.l.bird]

UART's will not send 9-bit true data, they will send 8-bits plus a parity bit (9) + 1 or 2 stop bits, is this what you weant to do or do you have 9-bits of data?

 

[Vadim]

Herman, if all you need is a true second stop bit, just add a pause at least 1 bit long after sending each character.

 

[hesinije]

Bulkpaq, it's just how one describes 9 bits, some documentation calls it as 9 bits as they mean 8 bits + 1 parity bit. I mean 8 data bits + 2 stop bits.
Vadim, I'll try this.

Thanks.
Herman, NL