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work on RTC tamper interrupt and external wake

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This commit is contained in:
Joey Castillo
2021-08-08 15:02:38 -04:00
parent 27edc50be1
commit e45fdf15af
6 changed files with 106 additions and 41 deletions
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84
watch-library/watch/watch.c
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@@ -1,6 +1,16 @@
#include "watch.h"
#include <stdlib.h>
//////////////////////////////////////////////////////////////////////////////////////////
// User callbacks and other definitions
ext_irq_cb_t btn_alarm_callback;
ext_irq_cb_t a2_callback;
ext_irq_cb_t d1_callback;
static void extwake_callback(uint8_t reason);
//////////////////////////////////////////////////////////////////////////////////////////
// Initialization
@@ -15,7 +25,14 @@ void _watch_init() {
// Not sure if this belongs in every app -- is there a power impact?
delay_driver_init();
// set up state
btn_alarm_callback = NULL;
a2_callback = NULL;
d1_callback = NULL;
}
//////////////////////////////////////////////////////////////////////////////////////////
// Segmented Display
@@ -215,8 +232,16 @@ void watch_enable_buttons() {
EXTERNAL_IRQ_0_init();
}
void watch_register_button_callback(const uint32_t pin, ext_irq_cb_t callback) {
ext_irq_register(pin, callback);
void watch_register_button_callback(const uint8_t pin, ext_irq_cb_t callback) {
if (pin == BTN_ALARM) {
gpio_set_pin_direction(BTN_ALARM, GPIO_DIRECTION_IN);
gpio_set_pin_pull_mode(BTN_ALARM, GPIO_PULL_DOWN);
gpio_set_pin_function(BTN_ALARM, PINMUX_PA02G_RTC_IN2);
btn_alarm_callback = callback;
_extwake_register_callback(&CALENDAR_0.device, extwake_callback);
} else {
ext_irq_register(pin, callback);
}
}
//////////////////////////////////////////////////////////////////////////////////////////
@@ -310,15 +335,8 @@ void watch_get_date_time(struct calendar_date_time *date_time) {
calendar_get_date_time(&CALENDAR_0, date_time);
}
static ext_irq_cb_t tick_user_callback;
static void tick_callback(struct calendar_dev *const dev) {
tick_user_callback();
}
void watch_register_tick_callback(ext_irq_cb_t callback) {
tick_user_callback = callback;
_prescaler_register_callback(&CALENDAR_0.device, &tick_callback);
_prescaler_register_callback(&CALENDAR_0.device, callback);
}
//////////////////////////////////////////////////////////////////////////////////////////
@@ -448,6 +466,32 @@ uint32_t watch_i2c_read32(int16_t addr, uint8_t reg) {
//////////////////////////////////////////////////////////////////////////////////////////
// Deep Sleep
static void extwake_callback(uint8_t reason) {
if (reason & RTC_TAMPID_TAMPID2) {
if (btn_alarm_callback != NULL) btn_alarm_callback();
} else if (reason & RTC_TAMPID_TAMPID1) {
if (a2_callback != NULL) a2_callback();
} else if (reason & RTC_TAMPID_TAMPID0) {
if (d1_callback != NULL) d1_callback();
}
}
void watch_register_extwake_callback(uint8_t pin, ext_irq_cb_t callback) {
uint32_t pinmux;
if (pin == D1) {
d1_callback = callback;
pinmux = PINMUX_PB00G_RTC_IN0;
} else if (pin == A2) {
a2_callback = callback;
pinmux = PINMUX_PB02G_RTC_IN1;
} else {
return;
}
gpio_set_pin_direction(pin, GPIO_DIRECTION_IN);
gpio_set_pin_function(pin, pinmux);
_extwake_register_callback(&CALENDAR_0.device, extwake_callback);
}
void watch_store_backup_data(uint32_t data, uint8_t reg) {
if (reg < 8) {
RTC->MODE0.BKUP[reg].reg = data;
@@ -462,14 +506,14 @@ uint32_t watch_get_backup_data(uint8_t reg) {
return 0;
}
static void extwake_callback(struct calendar_dev *const dev) {
// this will never get called since we are basically waking from reset
}
void watch_enter_deep_sleep() {
// enable and configure the external wake interrupt
_extwake_register_callback(&CALENDAR_0.device, &extwake_callback);
_tamper_enable_debounce_asynchronous(&CALENDAR_0.device);
// enable and configure the external wake interrupt, if not already set up.
if (btn_alarm_callback == NULL && a2_callback == NULL && d1_callback == NULL) {
gpio_set_pin_direction(BTN_ALARM, GPIO_DIRECTION_IN);
gpio_set_pin_pull_mode(BTN_ALARM, GPIO_PULL_DOWN);
gpio_set_pin_function(BTN_ALARM, PINMUX_PA02G_RTC_IN2);
_extwake_register_callback(&CALENDAR_0.device, extwake_callback);
}
// disable SLCD
slcd_sync_deinit(&SEGMENT_LCD_0);
@@ -477,12 +521,6 @@ void watch_enter_deep_sleep() {
// TODO: disable other peripherals
// disable EIC interrupt on ALARM pin (if any) and enable RTC interrupt.
ext_irq_disable(BTN_ALARM);
gpio_set_pin_direction(BTN_ALARM, GPIO_DIRECTION_IN);
gpio_set_pin_pull_mode(BTN_ALARM, GPIO_PULL_DOWN);
gpio_set_pin_function(BTN_ALARM, PINMUX_PA02G_RTC_IN2);
// go into backup sleep mode
sleep(5);
}