87 lines
2.1 KiB
C
87 lines
2.1 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 <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/events/battery-state-changed.h>
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struct device *battery;
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static int zmk_battery_update(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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LOG_DBG("Setting BAS GATT battery level to %d.", state_of_charge.val1);
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rc = bt_gatt_bas_set_battery_level(state_of_charge.val1);
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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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struct battery_state_changed *ev = new_battery_state_changed();
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ev->state_of_charge = state_of_charge.val1;
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return ZMK_EVENT_RAISE(ev);
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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(struct device *_arg) {
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battery = device_get_binding("BATTERY");
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if (battery == NULL) {
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LOG_DBG("No battery device labelled BATTERY found.");
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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_MINUTES(1));
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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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