[En-Nut-Discussion] External interrupts on Ethernut 3

[Henrik Maier]

I also would be very interested in a Nut/OS MCP2515 driver. I do have some
MCP2515 driver code which is Nut/OS independent which I can share and which
can be incorporated into a future Nut/OS driver.

Henrik

> -----Original Message-----
> From: en-nut-discussion-bounces at egnite.de [mailto:en-nut-discussion-
> bounces at egnite.de] On Behalf Of Ole Reinhardt
> Sent: Saturday, 28 March 2009 1:57 AM
> To: Ethernut User Chat (English)
> Subject: Re: [En-Nut-Discussion] External interrupts on Ethernut 3
> 
> Hello,
> 
> > Sorry for spamming the list.
> 
> No problem, but I did not fully understand your question / problem. It
> seemed you had mailed with somebody private before moving to the
> list...
> So I was missing the background of your question.
> 
> > Apparently manipulating the registers of the microcontroller is not
> > necessary, which of course is logical for this kind of os.
> 
> Yes, you should be able to use NutRegisterIrq for your purpose.
> 
> > Originally I was adapting the SJA1000 driver for MCP2515 and in the
> > initialization of the SJA1000 driver there was some direct register
> access
> > which I assumed was necessary because that driver was in the Nut/OS
> > distribution.
> 
> The SJA1000 driver uses direct register access, as this device is
> connected to the data bus of the AVR. In your case you'll just use the
> SPI driver as base, right?
> 
> > The interrupt handling still does not work but at least I get
> interrupts
> > (Which unfortunately jam the system currently).
> 
> If you want you may send me some code example and I'd take a look on
> it.
> Btw: I'd be happy if you would contribute your code, as I'll need the
> MCP2515 in an upcomming project as well...
> 
> Best regards,
> 
> Ole Reinhardt
> 
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