[ECOS] Interrupt driven serial communication on AT91

[ECOS] Interrupt driven serial communication on AT91

[Tom Deconinck]

Hi,

I'm trying to use the interrupt driven driver on the debug serial port
of the AT91 using the  CYGPKG_IO_SERIAL_ARM_AT91.
I figured out that the debug port is linked with
CYPKG_IO_SERIAL_ARM_AT91_SERIAL2 and I have enabled termios and the
tty-mode serial device drivers on it.
The only result I get by doing that is that I get spurious interrupts
at runtime.
Is there anything that needs to be explicitly disabled? Or did I miss
something else?

Tom

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Re: [ECOS] Interrupt driven serial communication on AT91

[Andrew Lunn]

On Fri, Mar 07, 2008 at 08:27:56AM +0100, Tom Deconinck wrote:
> Hi,
> 
> I'm trying to use the interrupt driven driver on the debug serial port
> of the AT91 using the  CYGPKG_IO_SERIAL_ARM_AT91.
> I figured out that the debug port is linked with
> CYPKG_IO_SERIAL_ARM_AT91_SERIAL2 and I have enabled termios and the
> tty-mode serial device drivers on it.
> The only result I get by doing that is that I get spurious interrupts
> at runtime.
> Is there anything that needs to be explicitly disabled? Or did I miss
> something else?

Which AT91 device?

Which interrupt is generating spurious interrupts?

The DBG USART interrupt is multiplexed on the System Interrupt. Does
you platform define the necessary macros so that the code in
hal/arm/at91/var/current/src/at91_misc.c demultiplexes the system
interrupt?

        Andrew

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Re: [ECOS] Interrupt driven serial communication on AT91

[Tom Deconinck]

I'm using the AT91SAM7SE variant.

And it is the PITC (IRQ number 32) that seem to be causing the
spurious interrupts.

I'll check the demultiplexing code to make sure the right macros are
defined (I suppose they are since my target uses everything from the
AT91SAM7S code...)

Tom

On Fri, Mar 7, 2008 at 12:43 PM, Andrew Lunn <andrew@lunn.ch> wrote:
>
> On Fri, Mar 07, 2008 at 08:27:56AM +0100, Tom Deconinck wrote:
>  > Hi,
>  >
>  > I'm trying to use the interrupt driven driver on the debug serial port
>  > of the AT91 using the  CYGPKG_IO_SERIAL_ARM_AT91.
>  > I figured out that the debug port is linked with
>  > CYPKG_IO_SERIAL_ARM_AT91_SERIAL2 and I have enabled termios and the
>  > tty-mode serial device drivers on it.
>  > The only result I get by doing that is that I get spurious interrupts
>  > at runtime.
>  > Is there anything that needs to be explicitly disabled? Or did I miss
>  > something else?
>
>  Which AT91 device?
>
>  Which interrupt is generating spurious interrupts?
>
>  The DBG USART interrupt is multiplexed on the System Interrupt. Does
>  you platform define the necessary macros so that the code in
>  hal/arm/at91/var/current/src/at91_misc.c demultiplexes the system
>  interrupt?
>
>         Andrew
>

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