AVR-Chat

Does anybody have a experience of how to setup, connect and transfer 
data via an AVR162 SPI connected to a MAX3100. 

From the MAX3100 datasheet it looks like there is always a 16 bit word 
transfer between the MAX3100 and the connecting device. On the AVR side 
it supports 8bits only. Can I just transfer two bytes after each other 
to satisfy the 16bit transfer ?

Does anyone no of a code library that supports SPI on the AVR that I 
can use as reference ?

Thanks,

Deon.

--- In AVR-Chat@yahoogroups.com, "deonbez2002" <deonbez@...> wrote:
>
> Does anybody have a experience of how to setup, connect and transfer 
> data via an AVR162 SPI connected to a MAX3100. 

Long ago, 8 of them talking to an 8535.

> Can I just transfer two bytes after each other 
> to satisfy the 16bit transfer ?

Yes, but don't let /CS go invalid between transfers.

> Does anyone no of a code library that supports SPI on the AVR that I 
> can use as reference ?

I may be able to find it.  But my conclusion at the end was that 
smaller AVRs for each port would have been a better solution. Cheaper, 
more "brains" available, larger buffers, plus I could send new firmware 
as desired.

----- Original Message ----- 

From: "Dave VanHorn" <dvh@dvanhorn.org>
To: <AVR-Chat@yahoogroups.com>
Sent: Tuesday, February 14, 2006 4:49 AM
Subject: [AVR-Chat] Re: Some help required with SPI on AVR162 and MAX3100


> --- In AVR-Chat@yahoogroups.com, "deonbez2002" <deonbez@...> wrote:
>>
>> Does anybody have a experience of how to setup, connect and transfer
>> data via an AVR162 SPI connected to a MAX3100.
>
> Long ago, 8 of them talking to an 8535.
>
>> Can I just transfer two bytes after each other
>> to satisfy the 16bit transfer ?
>
> Yes, but don't let /CS go invalid between transfers.
>
>> Does anyone no of a code library that supports SPI on the AVR that I
>> can use as reference ?
>
> I may be able to find it.  But my conclusion at the end was that
> smaller AVRs for each port would have been a better solution. Cheaper,
> more "brains" available, larger buffers, plus I could send new firmware
> as desired.

I designed a system like that a few years ago for a comms hub - four 2313s 
connected to a mid-range PIC via SPI. I used software SPI on the 2313s.

Leon
--
Leon Heller, G1HSM
leon.heller@bulldoghome.com
http://www.geocities.com/leon_heller

Dave,

Thanks for the advice of using smaller AVRs. I will use that solution 
in future.

I have a current product with a Max3100 and will appreciate it if you 
can lay you hands on the code and forward it to me.

Deon Bez.