mirror of
https://github.com/sle118/squeezelite-esp32.git
synced 2025-12-06 19:47:02 +03:00
104 lines
3.0 KiB
C
104 lines
3.0 KiB
C
/*
|
|
This example code is in the Public Domain (or CC0 licensed, at your option.)
|
|
|
|
Unless required by applicable law or agreed to in writing, this
|
|
software is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
|
|
CONDITIONS OF ANY KIND, either express or implied.
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <unistd.h>
|
|
#include <string.h>
|
|
#include "freertos/FreeRTOS.h"
|
|
#include "freertos/timers.h"
|
|
#include "esp_system.h"
|
|
#include "esp_log.h"
|
|
#include "driver/adc.h"
|
|
#include "battery.h"
|
|
#include "platform_config.h"
|
|
|
|
/*
|
|
There is a bug in esp32 which causes a spurious interrupt on gpio 36/39 when
|
|
using ADC, AMP and HALL sensor. Rather than making battery aware, we just ignore
|
|
if as the interrupt lasts 80ns and should be debounced (and the ADC read does not
|
|
happen very often)
|
|
*/
|
|
|
|
#define BATTERY_TIMER (10*1000)
|
|
|
|
static const char *TAG = "battery";
|
|
|
|
static struct {
|
|
int channel;
|
|
float sum, avg, scale;
|
|
int count;
|
|
int cells, attenuation;
|
|
TimerHandle_t timer;
|
|
} battery = {
|
|
.channel = CONFIG_BAT_CHANNEL,
|
|
.cells = 2,
|
|
.attenuation = ADC_ATTEN_DB_0,
|
|
};
|
|
|
|
/****************************************************************************************
|
|
*
|
|
*/
|
|
float battery_value_svc(void) {
|
|
return battery.avg;
|
|
}
|
|
|
|
/****************************************************************************************
|
|
*
|
|
*/
|
|
uint8_t battery_level_svc(void) {
|
|
// TODO: this is vastly incorrect
|
|
int level = battery.avg ? (battery.avg - (3.0 * battery.cells)) / ((4.2 - 3.0) * battery.cells) * 100 : 0;
|
|
return level < 100 ? level : 100;
|
|
}
|
|
|
|
/****************************************************************************************
|
|
*
|
|
*/
|
|
static void battery_callback(TimerHandle_t xTimer) {
|
|
battery.sum += adc1_get_raw(battery.channel) * battery.scale / 4095.0;
|
|
if (++battery.count == 30) {
|
|
battery.avg = battery.sum / battery.count;
|
|
battery.sum = battery.count = 0;
|
|
ESP_LOGI(TAG, "Voltage %.2fV", battery.avg);
|
|
}
|
|
}
|
|
|
|
/****************************************************************************************
|
|
*
|
|
*/
|
|
void battery_svc_init(void) {
|
|
#ifdef CONFIG_BAT_SCALE
|
|
battery.scale = atof(CONFIG_BAT_SCALE);
|
|
#endif
|
|
|
|
char *nvs_item = config_alloc_get_default(NVS_TYPE_STR, "bat_config", "n", 0);
|
|
if (nvs_item) {
|
|
#ifndef CONFIG_BAT_LOCKED
|
|
PARSE_PARAM(nvs_item, "channel", '=', battery.channel);
|
|
PARSE_PARAM(nvs_item, "scale", '=', battery.scale);
|
|
PARSE_PARAM(nvs_item, "atten", '=', battery.attenuation);
|
|
#endif
|
|
PARSE_PARAM(nvs_item, "cells", '=', battery.cells);
|
|
free(nvs_item);
|
|
}
|
|
|
|
if (battery.channel != -1) {
|
|
adc1_config_width(ADC_WIDTH_BIT_12);
|
|
adc1_config_channel_atten(battery.channel, battery.attenuation);
|
|
|
|
battery.avg = adc1_get_raw(battery.channel) * battery.scale / 4095.0;
|
|
battery.timer = xTimerCreate("battery", BATTERY_TIMER / portTICK_RATE_MS, pdTRUE, NULL, battery_callback);
|
|
xTimerStart(battery.timer, portMAX_DELAY);
|
|
|
|
ESP_LOGI(TAG, "Battery measure channel: %u, scale %f, cells %u, avg %.2fV", battery.channel, battery.scale, battery.cells, battery.avg);
|
|
} else {
|
|
ESP_LOGI(TAG, "No battery");
|
|
}
|
|
}
|