[U-Boot] Antw: Re: Interrupts in uboot with ARM AT91SAM9 (V2)

[Manuel Sahm <Manuel.Sahm@feig.de>]

Hello,

I?ve already inserted the following code:

In at91sam9g20ek.c:

void thread_test(void)
{
	printf("RESET via INT\n");
}

in function :static void at91sam9g20ek_macb_hw_init (void)
{
.......

at91_sys_write(AT91_RSTC_MR, AT91_RSTC_KEY | AT91_RSTC_URSTIEN);
// Reset Bit AT91_RSTC_URSTS
at91_sys_read(AT91_RSTC_SR);	

at91_sys_write(AT91_PMC_PCER, 1 << AT91_ID_SYS);
at91_sys_write(AT91_AIC_IDCR, 0x01 << AT91_ID_SYS);
at91_sys_write(AT91_AIC_SVR(AT91_ID_SYS), (unsigned int)thread_test);
at91_sys_write(AT91_AIC_SMR(AT91_ID_SYS), 5 | AT91_AIC_SRCTYPE_LOW);
at91_sys_write(AT91_AIC_ICCR, 0x01 << AT91_ID_SYS);
at91_sys_write(AT91_AIC_IECR, 0x01 << AT91_ID_SYS);

.....
}


 if I trigger my interrupt - the system hangs....nothing is printed on
screen and I can?t enter anything in the prompt ?

Anything else that I have to add ???

Thanks very much...
Manuel


>>> Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> 05.09.2009
02:49 >>>
On 10:31 Thu 03 Sep     , Manuel Sahm wrote:
> Hello,
>  
> I have to use interrupts in UBoot 1.3.4 - how could I enable them ?
>  
> I have an AT91SAM9G20 - in ist header file I enable CONFIG_USE_IRQ
und
> uncomment the lines#ifdefc CONFIG_USE_IRQ #error .... #endif.
> I inserted the lines:
> #define CONFIG_STACKSIZE_IRQ (4*1024)
> #define CONFIG_STACKSIZE_FIQ (4*1024)
>  
> 
> In the file (/lib_amr/interrupts.c) I have to insert a function
called
> do_irq().
> I inserted:
>  
> void do_irq(struct pt_regs* pt_regs)
> {
>  printf("interrupt request\n");
>  show_regs(pt_regs);
>  bad_mode();
> }
>  
> When UBOOT starts all seems to be OK, but if I trigger my interrupt
-
> the system hangs....nothing is printed on screen anmd I can?t enter
> anything in the prompt ?
>  
> Could you please help me.... ?
you need to clear the interrupt and add the at91 interrupt controller
to use it

Best Regards,
J.
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