diff options
Diffstat (limited to 'libmaple/exti.c')
| -rw-r--r-- | libmaple/exti.c | 39 |
1 files changed, 18 insertions, 21 deletions
diff --git a/libmaple/exti.c b/libmaple/exti.c index ea65d6f..4999746 100644 --- a/libmaple/exti.c +++ b/libmaple/exti.c @@ -146,35 +146,26 @@ void exti_detach_interrupt(afio_exti_num num) { * Interrupt handlers */ -static inline void clear_pending(uint32 exti_num); -static inline void dispatch_handler(uint32 exti_num); +static inline void handle_exti(uint32 exti_num); -/* For AFIO_EXTI_0 through AFIO_EXTI_4, only one handler is associated - * with each channel, so we don't have to keep track of which channel - * we came from */ void __irq_exti0(void) { - dispatch_handler(AFIO_EXTI_0); - clear_pending(AFIO_EXTI_0); + handle_exti(AFIO_EXTI_0); } void __irq_exti1(void) { - dispatch_handler(AFIO_EXTI_1); - clear_pending(AFIO_EXTI_1); + handle_exti(AFIO_EXTI_1); } void __irq_exti2(void) { - dispatch_handler(AFIO_EXTI_2); - clear_pending(AFIO_EXTI_2); + handle_exti(AFIO_EXTI_2); } void __irq_exti3(void) { - dispatch_handler(AFIO_EXTI_3); - clear_pending(AFIO_EXTI_3); + handle_exti(AFIO_EXTI_3); } void __irq_exti4(void) { - dispatch_handler(AFIO_EXTI_4); - clear_pending(AFIO_EXTI_4); + handle_exti(AFIO_EXTI_4); } void __irq_exti9_5(void) { @@ -185,8 +176,7 @@ void __irq_exti9_5(void) { /* Dispatch every handler if the pending bit is set */ for (i = 0; i < 5; i++) { if (pending & 0x1) { - dispatch_handler(AFIO_EXTI_5 + i); - clear_pending(AFIO_EXTI_5 + i); + handle_exti(AFIO_EXTI_5 + i); } pending >>= 1; } @@ -200,8 +190,7 @@ void __irq_exti15_10(void) { /* Dispatch every handler if the pending bit is set */ for (i = 0; i < 6; i++) { if (pending & 0x1) { - dispatch_handler(AFIO_EXTI_10 + i); - clear_pending(AFIO_EXTI_10 + i); + handle_exti(AFIO_EXTI_10 + i); } pending >>= 1; } @@ -211,8 +200,12 @@ void __irq_exti15_10(void) { * Auxiliary functions */ -static inline void clear_pending(uint32 exti_num) { - *bb_perip(&EXTI_BASE->PR, exti_num) = 1; +static inline void clear_pending(uint32 exti_num); +static inline void dispatch_handler(uint32 exti_num); + +static inline void handle_exti(uint32 exti) { + dispatch_handler(exti); + clear_pending(exti); /* If the pending bit is cleared as the last instruction in an ISR, * it won't actually be cleared in time and the ISR will fire again. * Insert a 2-cycle buffer to allow it to take effect. */ @@ -227,6 +220,10 @@ static inline void dispatch_handler(uint32 exti_num) { } } +static inline void clear_pending(uint32 exti_num) { + *bb_perip(&EXTI_BASE->PR, exti_num) = 1; +} + static inline void enable_irq(afio_exti_num exti) { /* Maybe twiddle the IRQ bitmap for extis with multiplexed IRQs */ if (exti > 4) { |