[U-Boot] Interrupts in uboot with ARM AT91SAM9 (V2)
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.... ?
I have to trigger an interrupt if the Reset Pin is low to disable the SDRAM Controller and perform a soft reset (It´s a bug in the AT91SAM9G20).
Thanks a lot Manuel
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.
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 cańt 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 cańt 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. _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
participants (2)
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Jean-Christophe PLAGNIOL-VILLARD -
Manuel Sahm