Posted on May 17, 2011 at 09:43Hi all,
my external interrupt (EXINT 4) doesn't work. I tried all resolutions dicussed before, but my system won't run.
I wor with a STR912FW44 ,a STR910FW32 and the CrossStudio IDE by Rowley.
My Code looks like this:
void init_external_irq (void)
{
SCU_PRR1 |= 0x20000; // Disable Reset from Port 3
SCU_PCGR1 |= 0x20000; // Clock enabling from Port 3
SCU_PRR1 |= 0x2000; // Disable Reset from WIU
SCU_PCGR1 |= 0x2000; // Clock enabling to WIU
WIU_PR = 0xfffc; // Clear all external interrupts
SCU_GPIOIN3 |= 0x38; // Configure Ports to alternative Input
WIU_MR |= 0x10; // Enable external IRQ 4
WIU_CTRL |= 0x02; // Global WIU Interrupt Enable (ext irq)
VIC1_VA9R = (unsigned int)&irq_handler_extern; // Set the address
VIC1_VC9R = 0x29; // Use slot 9 for WIU interrupt (ext irq)
VIC1_INTER |= 0x200; // Enable external IRQ (Bit 4)
}
