nghia
Posts: 18
Joined: Fri Aug 26, 2011 11:02 pm

Re: SPI on final PCB

Sun Nov 27, 2011 9:03 pm

Hello R-PI team,

Could you confirm that SPI is available on the expansion header on the final PCB?
If so, is a SPI driver plan for the first release?

Thanks

Nghia.

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liz
Raspberry Pi Foundation Employee & Forum Moderator
Raspberry Pi Foundation Employee & Forum Moderator
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Re: SPI on final PCB

Sun Nov 27, 2011 9:05 pm

A driver is not planned for the first release (we hope the community might write one), but yes, SPI is available on the header.
Director of Communications, Raspberry Pi

trogper
Posts: 10
Joined: Sun Oct 09, 2011 11:37 am

Re: SPI on final PCB

Mon Nov 28, 2011 3:48 pm

what about just GPIO driver?
will it be available?

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abishur
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Re: SPI on final PCB

Mon Nov 28, 2011 4:26 pm

I believe the answer to that one is that the standard linux interface for GPIO should be sufficient. Otherwise see liz's post above except replace SPI with GPIO :P
Dear forum: Play nice ;-)

mahadevan
Posts: 4
Joined: Thu Nov 10, 2011 2:52 am

Re: SPI on final PCB

Mon Nov 28, 2011 4:52 pm

Till R-pi team gives SPI-drivers in future editions, one can use SPI over GPIO using bit-banging.

Some working SPI/I2C drivers in linux are vailable in OpenWRT/DD-WRT projects .

nghia
Posts: 18
Joined: Fri Aug 26, 2011 11:02 pm

Re: SPI on final PCB

Tue Nov 29, 2011 9:17 pm

Hi Liz,

In order to enable one to develop a SPI driver, would you release the required information on the SPI block of the Broadcom SoC? If yes, when could you release such info?

Thanks

tntexplosivesltd
Posts: 72
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Re: SPI on final PCB

Tue Nov 29, 2011 9:20 pm

From memory, it has been stated that we will be provided with full documentation

Warringer
Posts: 56
Joined: Tue Aug 23, 2011 5:04 pm

Re: SPI on final PCB

Wed Nov 30, 2011 7:10 pm

In the meantime it should be possible to bit-bang the SPI with the GPIO.

vacoloco
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Re: SPI on final PCB

Sat Dec 31, 2011 11:26 pm

Is this still the case? I mean, that initially SPI won't be supported in the kernel build?

For me, this is a key feature as I want to interface to an FPGA and some SPI DACs.

Michael
Posts: 340
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Re: SPI on final PCB

Sun Jan 01, 2012 1:22 pm

Yes, this is still the case.  There is no appropriate SPI driver in the upstream so it'll have to be written and the Raspberry Pi team are far too busy getting the board out of the door and all the other tasks such as getting an office set up, geting cases designed, getting documentation in place and getting legals sorted, to be writing SPI drivers any time soon.  Its simply too far down in their list of priorities.

Writing an SPI driver would seem, on the face of it, exactly the kind of task of which the community would be capable.  I'm sure that such a driver would emerge in the months after the boards start getting into the hands of the enthusiasts.

jwatte
Posts: 203
Joined: Sat Aug 13, 2011 7:28 pm

Re: SPI on final PCB

Sun Jan 01, 2012 7:18 pm


Writing an SPI driver would seem, on the face of it, exactly the kind of task of which the community would be capable.  I'm sure that such a driver would emerge in the months after the boards start getting into the hands of the enthusiasts.


Send me a board and the register description and I'll write you a driver right away

David Calvo
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Re: SPI on final PCB

Tue Jan 03, 2012 2:00 pm

See

http://www.raspberrypi.org/for.....ing/page-2

I do not think drivers are a problem

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