243 lines
8.0 KiB
C
243 lines
8.0 KiB
C
/*
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* This file is part of the MicroPython project, http://micropython.org/
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*
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* The MIT License (MIT)
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*
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* Copyright (c) 2020 Dan Halbert for Adafruit Industries
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* Copyright (c) 2020 Scott Shawcroft for Adafruit Industries
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* Copyright (c) 2021 Junji Sakai
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "py/runtime.h"
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#include <stdio.h>
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#include <assert.h>
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#include "shared-bindings/alarm/pin/PinAlarm.h"
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#include "shared-bindings/microcontroller/__init__.h"
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#include "shared-bindings/microcontroller/Pin.h"
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#include "common-hal/alarm/__init__.h"
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#include "nrfx.h"
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#include "nrf_gpio.h"
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#include "nrfx_gpiote.h"
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#include "nrf_soc.h"
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#include <string.h>
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#include "supervisor/serial.h" // dbg_print
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#define WPIN_UNUSED 0xFF
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volatile char _pinhandler_gpiote_count;
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static bool pins_configured = false;
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extern uint32_t reset_reason_saved;
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extern void dbg_dump_GPIOregs(void);
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void common_hal_alarm_pin_pinalarm_construct(alarm_pin_pinalarm_obj_t *self, mcu_pin_obj_t *pin, bool value, bool edge, bool pull) {
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if (edge) {
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mp_raise_ValueError(translate("Cannot wake on pin edge. Only level."));
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}
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if (pin->number >= NUMBER_OF_PINS) {
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mp_raise_ValueError(translate("Invalid pin"));
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}
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self->pin = pin;
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self->value = value;
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self->pull = pull;
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}
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mcu_pin_obj_t *common_hal_alarm_pin_pinalarm_get_pin(alarm_pin_pinalarm_obj_t *self) {
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return self->pin;
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}
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bool common_hal_alarm_pin_pinalarm_get_value(alarm_pin_pinalarm_obj_t *self) {
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return self->value;
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}
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bool common_hal_alarm_pin_pinalarm_get_edge(alarm_pin_pinalarm_obj_t *self) {
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return false;
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}
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bool common_hal_alarm_pin_pinalarm_get_pull(alarm_pin_pinalarm_obj_t *self) {
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return self->pull;
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}
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static void pinalarm_gpiote_handler(nrfx_gpiote_pin_t pin, nrf_gpiote_polarity_t action) {
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++_pinhandler_gpiote_count;
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sleepmem_wakeup_event = SLEEPMEM_WAKEUP_BY_PIN;
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sleepmem_wakeup_pin = pin & 0xFF;
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}
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bool alarm_pin_pinalarm_woke_us_up(void) {
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return (sleepmem_wakeup_event == SLEEPMEM_WAKEUP_BY_PIN &&
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sleepmem_wakeup_pin != WAKEUP_PIN_UNDEF);
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}
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mp_obj_t alarm_pin_pinalarm_get_wakeup_alarm(size_t n_alarms, const mp_obj_t *alarms) {
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// First, check to see if we match any given alarms.
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for (size_t i = 0; i < n_alarms; i++) {
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if (!mp_obj_is_type(alarms[i], &alarm_pin_pinalarm_type)) {
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continue;
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}
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alarm_pin_pinalarm_obj_t *alarm = MP_OBJ_TO_PTR(alarms[i]);
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if (alarm->pin->number == sleepmem_wakeup_pin) {
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return alarms[i];
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}
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}
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alarm_pin_pinalarm_obj_t *alarm = m_new_obj(alarm_pin_pinalarm_obj_t);
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alarm->base.type = &alarm_pin_pinalarm_type;
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alarm->pin = NULL;
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// Map the pin number back to a pin object.
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for (size_t i = 0; i < mcu_pin_globals.map.used; i++) {
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const mcu_pin_obj_t* pin_obj = MP_OBJ_TO_PTR(mcu_pin_globals.map.table[i].value);
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if ((size_t) pin_obj->number == sleepmem_wakeup_pin) {
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alarm->pin = mcu_pin_globals.map.table[i].value;
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break;
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}
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}
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return alarm;
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}
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// These must be static because we need to configure pulls later, right before
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// deep sleep.
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static uint64_t high_alarms = 0;
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static uint64_t low_alarms = 0;
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static uint64_t pull_pins = 0;
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void alarm_pin_pinalarm_reset(void) {
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for (size_t i = 0; i < 64; i++) {
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uint64_t mask = 1ull << i;
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bool high = (high_alarms & mask) != 0;
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bool low = (low_alarms & mask) != 0;
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if (!(high || low)) {
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continue;
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}
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reset_pin_number(i);
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nrfx_gpiote_in_event_disable((nrfx_gpiote_pin_t)i);
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nrfx_gpiote_in_uninit((nrfx_gpiote_pin_t)i);
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}
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high_alarms = 0;
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low_alarms = 0;
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pull_pins = 0;
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}
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static void configure_pins_for_sleep(void) {
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nrfx_err_t err;
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if ( nrfx_gpiote_is_init() ) {
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nrfx_gpiote_uninit();
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}
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err = nrfx_gpiote_init(NRFX_GPIOTE_CONFIG_IRQ_PRIORITY);
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assert(err == NRFX_SUCCESS);
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(void)err; // to suppress unused warning
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_pinhandler_gpiote_count = 0;
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nrfx_gpiote_in_config_t cfg = {
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.sense = NRF_GPIOTE_POLARITY_TOGGLE,
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.pull = NRF_GPIO_PIN_PULLUP,
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.is_watcher = false,
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.hi_accuracy = true,
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.skip_gpio_setup = false
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};
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for(size_t i = 0; i < 64; ++i) {
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uint64_t mask = 1ull << i;
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if (((high_alarms & mask) == 0) && ((low_alarms & mask) == 0)) {
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continue;
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}
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if (((high_alarms & mask) != 0) && ((low_alarms & mask) == 0)) {
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cfg.sense = NRF_GPIOTE_POLARITY_LOTOHI;
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cfg.pull = ((pull_pins & mask) != 0) ?
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NRF_GPIO_PIN_PULLDOWN : NRF_GPIO_PIN_NOPULL;
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}
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else
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if (((high_alarms & mask) == 0) && ((low_alarms & mask) != 0)) {
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cfg.sense = NRF_GPIOTE_POLARITY_HITOLO;
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cfg.pull = ((pull_pins & mask) != 0) ?
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NRF_GPIO_PIN_PULLUP : NRF_GPIO_PIN_NOPULL;
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}
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else {
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cfg.sense = NRF_GPIOTE_POLARITY_TOGGLE;
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cfg.pull = NRF_GPIO_PIN_NOPULL;
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}
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err = nrfx_gpiote_in_init((nrfx_gpiote_pin_t)i, &cfg,
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pinalarm_gpiote_handler);
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assert(err == NRFX_SUCCESS);
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nrfx_gpiote_in_event_enable((nrfx_gpiote_pin_t)i, true);
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if (((high_alarms & mask) != 0) && ((low_alarms & mask) == 0)) {
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nrf_gpio_cfg_sense_set((uint32_t)i, NRF_GPIO_PIN_SENSE_HIGH);
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}
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if (((high_alarms & mask) == 0) && ((low_alarms & mask) != 0)) {
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nrf_gpio_cfg_sense_set((uint32_t)i, NRF_GPIO_PIN_SENSE_LOW);
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}
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}
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}
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void alarm_pin_pinalarm_set_alarms(bool deep_sleep, size_t n_alarms, const mp_obj_t *alarms) {
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// Bitmask of wake up settings.
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size_t high_count = 0;
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size_t low_count = 0;
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int pin_number = -1;
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for (size_t i = 0; i < n_alarms; i++) {
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if (!mp_obj_is_type(alarms[i], &alarm_pin_pinalarm_type)) {
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continue;
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}
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alarm_pin_pinalarm_obj_t *alarm = MP_OBJ_TO_PTR(alarms[i]);
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pin_number = alarm->pin->number;
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//dbg_printf("alarm_pin_pinalarm_set_alarms(pin#=%d, val=%d, pull=%d)\r\n", pin_number, alarm->value, alarm->pull);
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if (alarm->value) {
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high_alarms |= 1ull << pin_number;
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high_count++;
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} else {
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low_alarms |= 1ull << pin_number;
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low_count++;
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}
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if (alarm->pull) {
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pull_pins |= 1ull << pin_number;
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}
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}
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if (pin_number != -1) {
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if (!deep_sleep) {
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configure_pins_for_sleep();
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}
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else {
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// we don't setup gpio HW here but do them in
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// alarm_pin_pinalarm_prepare_for_deep_sleep() below
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reset_reason_saved = 0;
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pins_configured = false;
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}
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}
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else {
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//dbg_printf("alarm_pin_pinalarm_set_alarms() no valid pins\r\n");
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}
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}
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void alarm_pin_pinalarm_prepare_for_deep_sleep(void) {
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if (!pins_configured) {
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configure_pins_for_sleep();
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pins_configured = true;
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#ifdef NRF_DEBUG_PRINT
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//dbg_dump_GPIOregs();
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#endif
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}
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}
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