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-rw-r--r--libmaple/exti.c106
1 files changed, 83 insertions, 23 deletions
diff --git a/libmaple/exti.c b/libmaple/exti.c
index 9023782..91d8551 100644
--- a/libmaple/exti.c
+++ b/libmaple/exti.c
@@ -43,27 +43,27 @@ static inline void dispatch_extis(uint32 start, uint32 stop);
*/
typedef struct exti_channel {
- void (*handler)(void);
- uint32 irq_line;
+ void (*handler)(void *);
+ void *arg;
} exti_channel;
static exti_channel exti_channels[] = {
- { .handler = NULL, .irq_line = NVIC_EXTI0 }, // EXTI0
- { .handler = NULL, .irq_line = NVIC_EXTI1 }, // EXTI1
- { .handler = NULL, .irq_line = NVIC_EXTI2 }, // EXTI2
- { .handler = NULL, .irq_line = NVIC_EXTI3 }, // EXTI3
- { .handler = NULL, .irq_line = NVIC_EXTI4 }, // EXTI4
- { .handler = NULL, .irq_line = NVIC_EXTI_9_5 }, // EXTI5
- { .handler = NULL, .irq_line = NVIC_EXTI_9_5 }, // EXTI6
- { .handler = NULL, .irq_line = NVIC_EXTI_9_5 }, // EXTI7
- { .handler = NULL, .irq_line = NVIC_EXTI_9_5 }, // EXTI8
- { .handler = NULL, .irq_line = NVIC_EXTI_9_5 }, // EXTI9
- { .handler = NULL, .irq_line = NVIC_EXTI_15_10 }, // EXTI10
- { .handler = NULL, .irq_line = NVIC_EXTI_15_10 }, // EXTI11
- { .handler = NULL, .irq_line = NVIC_EXTI_15_10 }, // EXTI12
- { .handler = NULL, .irq_line = NVIC_EXTI_15_10 }, // EXTI13
- { .handler = NULL, .irq_line = NVIC_EXTI_15_10 }, // EXTI14
- { .handler = NULL, .irq_line = NVIC_EXTI_15_10 }, // EXTI15
+ { .handler = NULL, .arg = NULL }, // EXTI0
+ { .handler = NULL, .arg = NULL }, // EXTI1
+ { .handler = NULL, .arg = NULL }, // EXTI2
+ { .handler = NULL, .arg = NULL }, // EXTI3
+ { .handler = NULL, .arg = NULL }, // EXTI4
+ { .handler = NULL, .arg = NULL }, // EXTI5
+ { .handler = NULL, .arg = NULL }, // EXTI6
+ { .handler = NULL, .arg = NULL }, // EXTI7
+ { .handler = NULL, .arg = NULL }, // EXTI8
+ { .handler = NULL, .arg = NULL }, // EXTI9
+ { .handler = NULL, .arg = NULL }, // EXTI10
+ { .handler = NULL, .arg = NULL }, // EXTI11
+ { .handler = NULL, .arg = NULL }, // EXTI12
+ { .handler = NULL, .arg = NULL }, // EXTI13
+ { .handler = NULL, .arg = NULL }, // EXTI14
+ { .handler = NULL, .arg = NULL }, // EXTI15
};
/*
@@ -90,10 +90,37 @@ void exti_attach_interrupt(exti_num num,
exti_cfg port,
voidFuncPtr handler,
exti_trigger_mode mode) {
+ // Call callback version with arg being null
+ exti_attach_callback(num, port, (voidArgumentFuncPtr)handler, NULL, mode);
+}
+
+/**
+ * @brief Register a handler with an argument to run upon external interrupt.
+ *
+ * This function assumes that the interrupt request corresponding to
+ * the given external interrupt is masked.
+ *
+ * @param num External interrupt line number.
+ * @param port Port to use as source input for external interrupt.
+ * @param handler Function handler to execute when interrupt is triggered.
+ * @param arg Argument to pass to the interrupt handler.
+ * @param mode Type of transition to trigger on, one of:
+ * EXTI_RISING, EXTI_FALLING, EXTI_RISING_FALLING.
+ * @see exti_num
+ * @see exti_cfg
+ * @see voidFuncPtr
+ * @see exti_trigger_mode
+ */
+void exti_attach_callback(exti_num num,
+ exti_cfg port,
+ voidArgumentFuncPtr handler,
+ void *arg,
+ exti_trigger_mode mode) {
ASSERT(handler);
/* Register the handler */
exti_channels[num].handler = handler;
+ exti_channels[num].arg = arg;
/* Set trigger mode */
switch (mode) {
@@ -116,7 +143,39 @@ void exti_attach_interrupt(exti_num num,
bb_peri_set_bit(&EXTI_BASE->IMR, num, 1);
/* Enable the interrupt line */
- nvic_irq_enable(exti_channels[num].irq_line);
+ switch(num)
+ {
+ case 0:
+ nvic_irq_enable(NVIC_EXTI0);
+ break;
+ case 1:
+ nvic_irq_enable(NVIC_EXTI1);
+ break;
+ case 2:
+ nvic_irq_enable(NVIC_EXTI2);
+ break;
+ case 3:
+ nvic_irq_enable(NVIC_EXTI3);
+ break;
+ case 4:
+ nvic_irq_enable(NVIC_EXTI4);
+ break;
+ case 5:
+ case 6:
+ case 7:
+ case 8:
+ case 9:
+ nvic_irq_enable(NVIC_EXTI_9_5);
+ break;
+ case 10:
+ case 11:
+ case 12:
+ case 13:
+ case 14:
+ case 15:
+ nvic_irq_enable(NVIC_EXTI_15_10);
+ break;
+ }
}
/**
@@ -134,6 +193,7 @@ void exti_detach_interrupt(exti_num num) {
/* Finally, unregister the user's handler */
exti_channels[num].handler = NULL;
+ exti_channels[num].arg = NULL;
}
/*
@@ -199,13 +259,13 @@ static __always_inline void clear_pending_msk(uint32 exti_msk) {
/* This dispatch routine is for non-multiplexed EXTI lines only; i.e.,
* it doesn't check EXTI_PR. */
static __always_inline void dispatch_single_exti(uint32 exti) {
- voidFuncPtr handler = exti_channels[exti].handler;
+ voidArgumentFuncPtr handler = exti_channels[exti].handler;
if (!handler) {
return;
}
- handler();
+ handler(exti_channels[exti].arg);
clear_pending_msk(1U << exti);
}
@@ -219,9 +279,9 @@ static __always_inline void dispatch_extis(uint32 start, uint32 stop) {
for (exti = start; exti <= stop; exti++) {
uint32 eb = (1U << exti);
if (pr & eb) {
- voidFuncPtr handler = exti_channels[exti].handler;
+ voidArgumentFuncPtr handler = exti_channels[exti].handler;
if (handler) {
- handler();
+ handler(exti_channels[exti].arg);
handled_msk |= eb;
}
}