Hi, i'm trying to use watchdog in order to generate an interrupt
instead of a reset, setting:
AT91C_BASE_WDTC->WDTC_WDMR = WDTC_COUNT | (WDTC_COUNT << 16) |
AT91C_WDTC_WDFIEN;

but in my device header file i cannot find an ID macro that refer to
watchdog, in order to set the correct handle for the interrupt.
this is what i do for PIT timer:
AT91C_BASE_AIC->AIC_SMR[AT91C_ID_SYS] =
AT91C_AIC_SRCTYPE_INT_POSITIVE_EDGE | 7;
AT91C_BASE_AIC->AIC_SVR[AT91C_ID_SYS] = (unsigned long) timer_ISR;

// Enable interrupt
AT91C_BASE_AIC->AIC_IECR = (1 << AT91C_ID_SYS);

for the watchdog, witch ID i have to use? Any hint?
i can't find an example.

bye Andrea

"vizzz" <andrea.visinoni@gmail.com> wrote in message
news:1174397228.431557.140730@y66g2000hsf.googlegr oups.com...

Having a very quick glance at the user manual I see the following two bits
in WDT_MR register:

.. WDFIEN: Watchdog Fault Interrupt Enable
0: A Watchdog fault (underflow or error) has no effect on interrupt.
1: A Watchdog fault (underflow or error) asserts interrupt. .

WDRSTEN: Watchdog Reset Enable
0: A Watchdog fault (underflow or error) has no effect on the resets.
1: A Watchdog fault (underflow or error) triggers a Watchdog reset.

So it looks like you want to set WDFIEN to 0 and WDRSTEN to 0.


The watchdog is part of the system controller (shown on the schematic).
Therefore the following section would also apply:

"The Interrupt Source 1 is always located at System Interrupt. This is the
result of the OR-wiring
of the system peripheral interrupt lines, such as the System Timer, the Real
Time Clock, the
Power Management Controller and the Memory Controller. When a system
interrupt occurs, the
service routine must first distinguish the cause of the interrupt. This is
performed by reading successively
the status registers of the above mentioned system peripherals."

So interrupt source 1 is required. I use this in the FreeRTOS.org code to
generate PIT interrupts (also system interrupts). The following line is
used for the PIT:

AT91F_AIC_ConfigureIt( AT91C_BASE_AIC, AT91C_ID_SYS,
AT91C_AIC_PRIOR_HIGHEST, portINT_LEVEL_SENSITIVE, ( void (*)(void) )
vPortPreemptiveTick );

So it looks like AT91C_ID_SYS is the definition you are after? Have not
tried it though. Good luck ;-)

--
Regards,
Richard.

+ http://www.FreeRTOS.org
A free real time kernel for 8, 16 and 32bit systems.

+ http://www.SafeRTOS.com
An IEC 61508 compliant real time kernel for safety related systems.

Oops, should be:

So it looks like you want to set WDFIEN to 1 and WDRSTEN to 0.

Sorry.

--
Regards,
Richard.

+ http://www.FreeRTOS.org
A free real time kernel for 8, 16 and 32bit systems.

+ http://www.SafeRTOS.com
An IEC 61508 compliant real time kernel for safety related systems.

On 20 Mar, 14:47, "FreeRTOS.org" <noem...@noaddress.com> wrote:
ok, now things sounds clear to me, but i can't work on the board for a
few days.
without trying on the board an just coding is a damn mess.