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stmhal: Make USRSW re-register the EXTI callback each time it's set.

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This commit is contained in:
Damien George 2014-04-08 22:35:42 +01:00
parent 348435d279
commit b04488151e
3 changed files with 22 additions and 13 deletions
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12
stmhal/exti.c
View file

@ -105,9 +105,12 @@ STATIC const uint8_t nvic_irq_channel[EXTI_NUM_VECTORS] = {
OTG_HS_WKUP_IRQn, TAMP_STAMP_IRQn, RTC_WKUP_IRQn
};
// Set override_callback_obj to true if you want to unconditionally set the
// callback function.
//
// NOTE: param is for C callers. Python can use closure to get an object bound
// with the function.
uint exti_register(mp_obj_t pin_obj, mp_obj_t mode_obj, mp_obj_t pull_obj, mp_obj_t callback_obj, void *param) {
uint exti_register(mp_obj_t pin_obj, mp_obj_t mode_obj, mp_obj_t pull_obj, mp_obj_t callback_obj, bool override_callback_obj, void *param) {
const pin_obj_t *pin = NULL;
uint v_line;
@ -143,7 +146,7 @@ uint exti_register(mp_obj_t pin_obj, mp_obj_t mode_obj, mp_obj_t pull_obj, mp_ob
}
exti_vector_t *v = &exti_vector[v_line];
if (v->callback_obj != mp_const_none && callback_obj != mp_const_none) {
if (!override_callback_obj && v->callback_obj != mp_const_none && callback_obj != mp_const_none) {
nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_ValueError, "EXTI vector %d is already in use", v_line));
}
@ -272,7 +275,7 @@ STATIC mp_obj_t exti_make_new(mp_obj_t type_in, uint n_args, uint n_kw, const mp
mp_obj_t mode_obj = args[1];
mp_obj_t trigger_obj = args[2];
mp_obj_t callback_obj = args[3];
self->line = exti_register(line_obj, mode_obj, trigger_obj, callback_obj, NULL);
self->line = exti_register(line_obj, mode_obj, trigger_obj, callback_obj, false, NULL);
return self;
}
@ -315,7 +318,8 @@ void Handle_EXTI_Irq(uint32_t line) {
} else {
// Uncaught exception; disable the callback so it doesn't run again.
v->callback_obj = mp_const_none;
printf("Uncaught exception in EXTI interrupt handler on line %lu\n", line);
exti_disable(line);
printf("Uncaught exception in EXTI interrupt handler line %lu\n", line);
mp_obj_print_exception((mp_obj_t)nlr.ret_val);
}
gc_unlock();

2
stmhal/exti.h
View file

@ -22,7 +22,7 @@
void exti_init(void);
uint exti_register(mp_obj_t pin_obj, mp_obj_t mode_obj, mp_obj_t trigger_obj, mp_obj_t callback_obj, void *param);
uint exti_register(mp_obj_t pin_obj, mp_obj_t mode_obj, mp_obj_t trigger_obj, mp_obj_t callback_obj, bool override_callback_obj, void *param);
void exti_enable(uint line);
void exti_disable(uint line);

21
stmhal/usrsw.c
View file

@ -49,14 +49,9 @@ void switch_init0(void) {
HAL_GPIO_Init(MICROPY_HW_USRSW_PIN.gpio, &init);
}
// this function inits the callback and EXTI function of the switch
// this function inits the callback pointer
void switch_init(void) {
switch_user_callback_obj = mp_const_none;
exti_register((mp_obj_t)&MICROPY_HW_USRSW_PIN,
MP_OBJ_NEW_SMALL_INT(MICROPY_HW_USRSW_EXTI_MODE),
MP_OBJ_NEW_SMALL_INT(MICROPY_HW_USRSW_PULL),
(mp_obj_t)&switch_callback_obj,
NULL);
}
int switch_get(void) {
@ -70,9 +65,19 @@ int switch_get(void) {
static mp_obj_t pyb_switch(uint n_args, mp_obj_t *args) {
if (n_args == 0) {
return switch_get() ? mp_const_true : mp_const_false;
} else {
switch_user_callback_obj = args[0];
// Init the EXTI each time this function is called, since the EXTI
// may have been disabled by an exception in the interrupt, or the
// user disabling the line explicitly.
exti_register((mp_obj_t)&MICROPY_HW_USRSW_PIN,
MP_OBJ_NEW_SMALL_INT(MICROPY_HW_USRSW_EXTI_MODE),
MP_OBJ_NEW_SMALL_INT(MICROPY_HW_USRSW_PULL),
switch_user_callback_obj == mp_const_none ? mp_const_none : (mp_obj_t)&switch_callback_obj,
true,
NULL);
return mp_const_none;
}
switch_user_callback_obj = args[0];
return mp_const_none;
}
MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(pyb_switch_obj, 0, 1, pyb_switch);