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GPIOTE handlers for rotaryio.IncrementalEncoder adafruit/circuitpython#1045

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This commit is contained in:
Nick Moore 2019-02-05 14:13:16 +11:00
parent ee21cc163f
commit 21eb7e8e64
1 changed files with 32 additions and 0 deletions
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32
ports/nrf/common-hal/rotaryio/IncrementalEncoder.c
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@ -25,12 +25,41 @@
*/ */
#include "common-hal/rotaryio/IncrementalEncoder.h" #include "common-hal/rotaryio/IncrementalEncoder.h"
#include "nrfx_gpiote.h"
#include "py/runtime.h" #include "py/runtime.h"
// obj array to map pin -> self since nrfx hide the mapping
static rotaryio_incrementalencoder_obj_t *_objs[NUMBER_OF_PINS];
static void _intr_handler(nrfx_gpiote_pin_t pin, nrf_gpiote_polarity_t action) {
rotaryio_incrementalencoder_obj_t *self = _objs[pin];
if (!self) return;
self->position++;
}
void common_hal_rotaryio_incrementalencoder_construct(rotaryio_incrementalencoder_obj_t* self, void common_hal_rotaryio_incrementalencoder_construct(rotaryio_incrementalencoder_obj_t* self,
const mcu_pin_obj_t* pin_a, const mcu_pin_obj_t* pin_b) { const mcu_pin_obj_t* pin_a, const mcu_pin_obj_t* pin_b) {
self->pin_a = pin_a->number;
self->pin_b = pin_b->number;
_objs[self->pin_a] = self;
_objs[self->pin_b] = self;
nrfx_gpiote_in_config_t cfg = {
.sense = NRF_GPIOTE_POLARITY_TOGGLE,
.pull = NRF_GPIO_PIN_NOPULL,
.is_watcher = false,
.hi_accuracy = true,
.skip_gpio_setup = false
};
nrfx_gpiote_in_init(self->pin_a, &cfg, _intr_handler);
nrfx_gpiote_in_init(self->pin_b, &cfg, _intr_handler);
nrfx_gpiote_in_event_enable(self->pin_a, true);
nrfx_gpiote_in_event_enable(self->pin_b, true);
claim_pin(pin_a); claim_pin(pin_a);
claim_pin(pin_b); claim_pin(pin_b);
} }
@ -43,6 +72,9 @@ void common_hal_rotaryio_incrementalencoder_deinit(rotaryio_incrementalencoder_o
if (common_hal_rotaryio_incrementalencoder_deinited(self)) { if (common_hal_rotaryio_incrementalencoder_deinited(self)) {
return; return;
} }
_objs[self->pin_a] = NULL;
_objs[self->pin_b] = NULL;
reset_pin_number(self->pin_a); reset_pin_number(self->pin_a);
self->pin_a = NO_PIN; self->pin_a = NO_PIN;
reset_pin_number(self->pin_b); reset_pin_number(self->pin_b);