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initial isr. has problems.

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This commit is contained in:
Mariano Alvira 2009-04-20 18:38:45 -04:00
parent 09b15558a1
commit 10fdafbcb2
2 changed files with 42 additions and 0 deletions
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22
include/isr.h Normal file
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#ifndef ISR_H
#define ISR_H
#include "embedded_types.h"
#define INTBASE (0x80020000)
#define INTENNUM_OFF (0x8)
#define INTSRC_OFF (0x30)
#define INTENNUM INTBASE + INTENNUM_OFF
#define INTSRC INTBASE + INTSRC_OFF
#define no_isrs() no_tmr_isr();
#define enable_tmr_irq() *(volatile uint32_t *)(INTENNUM)
#define no_tmr_isr() void tmr_isr(void) { return; }
extern void tmr_isr(void);
#endif

20
src/isr.c Normal file
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#include "embedded_types.h"
#include "interrupt-utils.h"
#include "isr.h"
#define reg32(x) (*(volatile uint32_t *)(x))
__attribute__ ((interrupt("IRQ")))
void isr(void)
{
// ISR_ENTRY();
/* check for TMR0 interrupt */
// tmr_isr(); // led turns off if I have this, indicating that the isr does jump to tmr_isr
// if(reg32(INTSRC) & (1<<5)) { tmr_isr(); }
// asm("SUBS PC,R14_IRQ,#4")
// enableIRQ(); // I think this is necessary, but the LED never turns off when I have this
// ISR_EXIT(); // behavior doesn't change if I have this or not.
/* putting anything in here breaks the other code :( */
}