From: Nick Garnett <nickg@ecoscentric.com>
To: Chris Holgate <chris@zynaptic.com>
Cc: ecos-devel@ecos.sourceware.org
Subject: Re: STM32 - I/O pullup and EXTI issues, plus new SPI driver.
Date: Fri, 21 Nov 2008 15:53:00 -0000 [thread overview]
Message-ID: <m3prkp2i0l.fsf@xl5.calivar.com> (raw)
In-Reply-To: <1227280292.8476.47.camel@hercules.zynaptic.com>
Chris Holgate <chris@zynaptic.com> writes:
> Hi folks,
>
> I came across a couple of HAL issues while putting together my new SPI
> driver for the STM32. I appreciate that the maintainers are overloaded
> with eCos 3.0 work at the moment, so I'll defer to them as to whether
> any of this needs fixing now and can provide more information/patches on
> request.
>
> 1) It's not possible to set pullups on I/Os using the provided
> functions. This is a trivial one-line fix to stm32-misc.c.
>
> 2) External interrupts don't work as they stand. This requires a few
> changes to the STM32 var_intr.h. If required I can tidy up my changes
> there and provide a patch which I've tested using a single I/O
> (EXTINT0), but which would probably benefit from a bit more testing
> using other I/O configurations.
I can easily believe that both of these don't quite work. I didn't do
much testing in this area, so any changes to make it work are appreciated.
> 3) I've now got full register maps for the AFIO, DMA and SPI blocks.
> For development purposes I've kept these in a separate file from the
> STM32 var_io.h, but can provide the file for merging if required.
So long as they match the existing naming and layout conventions these
can be added to var_io.h very easily.
>
> FYI, I now have a DMA-based SPI driver that is fully functional in
> kernel mode, but will need one or two changes (and some testing!) to
> make it play nicely in non-kernel mode. Probably best to leave that
> until the 3.0 release is done, though.
You can mainly test polled operation in the kernel just by temporarily
forcing the polled parameter to true.
--
Nick Garnett eCos Kernel Architect
eCosCentric Limited http://www.eCosCentric.com The eCos experts
Barnwell House, Barnwell Drive, Cambridge, UK. Tel: +44 1223 245571
Registered in England and Wales: Reg No: 4422071
next prev parent reply other threads:[~2008-11-21 15:53 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-11-21 15:06 Chris Holgate
2008-11-21 15:15 ` Simon Kallweit
2008-11-21 15:52 ` Jonathan Larmour
2008-11-21 15:53 ` Nick Garnett [this message]
2008-11-21 17:08 ` Chris Holgate
2008-11-21 17:35 ` Nick Garnett
2008-11-22 12:53 ` Chris Holgate
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