Hi,

Roy J. Gromlich wrote:
>Has anyone had any experience using the Maxim 3100/3110  SPI UART chip =
wi=3D
>th the PIC 18Fxxx?  I have downloaded he info sheets from Maxim, which =
sh=3D
>ows what appears to be a bit-bang approach to driving the SPI =
interface. =3D
>The thing is, the 18Fxxxs have a nice SPI interface in them, but it =
isn't=3D
> clear how to use this with the Maxim. Any pointers in the correct =
direct=3D
>ion will be appreciated.

Yes, as a matter of fact, that exact combo is running in one of our main =
products.
That said, going back, I would have used an small pic instead, =
preferably 16F628
(altough to be fair that was not available at the time). The Maxim unit =
is expensive
atleast compared to a pic IMHO. It does work as advertised but I have =
some 'issues'
with the implementation of the IRQ line, it's abit tricky and I had to =
write some
ugly code in my ISR handler to get around it.=20
I have some code to share if you decide to venture down this route, the =
SPI i/f
is quite basic and easy to implement, in my case I had to use bitbanged =
i/f as the=20
MSSP module is tied up with I2C, the only 'special' feature is that I =
will abort
the SPI transfer after 2 bits depedning on the status of the RX/TX bits.

Please contact me off list if you need any code.

/Tony

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