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