113 lines
3.1 KiB
C
113 lines
3.1 KiB
C
/*
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* Copyright (c) 2020 The ZMK Contributors
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*
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* SPDX-License-Identifier: MIT
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*/
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#include <device.h>
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#include <devicetree.h>
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#include <init.h>
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#include <kernel.h>
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#include <drivers/sensor.h>
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#include <bluetooth/services/bas.h>
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#include <logging/log.h>
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LOG_MODULE_DECLARE(zmk, CONFIG_ZMK_LOG_LEVEL);
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#include <zmk/event_manager.h>
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#include <zmk/battery.h>
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#include <zmk/events/battery_state_changed.h>
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static uint8_t last_state_of_charge = 0;
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uint8_t zmk_battery_state_of_charge() { return last_state_of_charge; }
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#if DT_HAS_CHOSEN(zmk_battery)
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static const struct device *const battery = DEVICE_DT_GET(DT_CHOSEN(zmk_battery));
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#else
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#warning \
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"Using a node labeled BATTERY for the battery sensor is deprecated. Set a zmk,battery chosen node instead. (Ignore this if you don't have a battery sensor.)"
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static const struct device *battery;
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#endif
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static int zmk_battery_update(const struct device *battery) {
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struct sensor_value state_of_charge;
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int rc = sensor_sample_fetch_chan(battery, SENSOR_CHAN_GAUGE_STATE_OF_CHARGE);
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if (rc != 0) {
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LOG_DBG("Failed to fetch battery values: %d", rc);
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return rc;
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}
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rc = sensor_channel_get(battery, SENSOR_CHAN_GAUGE_STATE_OF_CHARGE, &state_of_charge);
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if (rc != 0) {
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LOG_DBG("Failed to get battery state of charge: %d", rc);
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return rc;
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}
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if (last_state_of_charge != state_of_charge.val1) {
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last_state_of_charge = state_of_charge.val1;
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LOG_DBG("Setting BAS GATT battery level to %d.", last_state_of_charge);
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rc = bt_bas_set_battery_level(last_state_of_charge);
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if (rc != 0) {
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LOG_WRN("Failed to set BAS GATT battery level (err %d)", rc);
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return rc;
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}
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rc = ZMK_EVENT_RAISE(new_zmk_battery_state_changed(
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(struct zmk_battery_state_changed){.state_of_charge = last_state_of_charge}));
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}
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return rc;
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}
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static void zmk_battery_work(struct k_work *work) {
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int rc = zmk_battery_update(battery);
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if (rc != 0) {
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LOG_DBG("Failed to update battery value: %d.", rc);
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}
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}
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K_WORK_DEFINE(battery_work, zmk_battery_work);
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static void zmk_battery_timer(struct k_timer *timer) { k_work_submit(&battery_work); }
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K_TIMER_DEFINE(battery_timer, zmk_battery_timer, NULL);
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static int zmk_battery_init(const struct device *_arg) {
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#if !DT_HAS_CHOSEN(zmk_battery)
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battery = device_get_binding("BATTERY");
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if (battery == NULL) {
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return -ENODEV;
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}
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LOG_WRN("Finding battery device labeled BATTERY is deprecated. Use zmk,battery chosen node.");
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#endif
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if (!device_is_ready(battery)) {
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LOG_ERR("Battery device \"%s\" is not ready", battery->name);
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return -ENODEV;
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}
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int rc = zmk_battery_update(battery);
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if (rc != 0) {
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LOG_DBG("Failed to update battery value: %d.", rc);
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return rc;
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}
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k_timer_start(&battery_timer, K_MINUTES(1), K_SECONDS(CONFIG_ZMK_BATTERY_REPORT_INTERVAL));
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return 0;
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}
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SYS_INIT(zmk_battery_init, APPLICATION, CONFIG_APPLICATION_INIT_PRIORITY);
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