84 lines
2.4 KiB
C++
84 lines
2.4 KiB
C++
#include <stdlib.h>
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#include <stdio.h>
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#include "HAL.h"
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#include "driver/adc.h"
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#include "esp_adc_cal.h"
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#ifdef WIN32
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# include <windows.h>
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#endif
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#define DEFAULT_VREF 1100 // Use adc2_vref_to_gpio() to obtain a better estimate
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#define NO_OF_SAMPLES 1 // Multisampling
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// ADC的配置
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static const adc1_channel_t channel = ADC1_CHANNEL_1; // GPIO34 if ADC1, GPIO14 if ADC2
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static const adc_bits_width_t width = ADC_WIDTH_BIT_12;
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static const adc_atten_t atten = ADC_ATTEN_DB_11;
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static const adc_unit_t unit = ADC_UNIT_1;
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static esp_adc_cal_characteristics_t adc_chars;
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static Power_Info_t Power_Info;
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void Power_Init(){
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// 配置ADC基本参数
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adc1_config_width(width);
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adc1_config_channel_atten(channel, atten);
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esp_adc_cal_characterize(unit, atten, width, DEFAULT_VREF, &adc_chars);
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}
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void Power_GetInfo(Power_Info_t* info)
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{
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/* Current version not support charging detect. */
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info->isCharging = false;
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info->usage = Power_Info.capacity;
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info->voltage = Power_Info.voltage;
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info->capacity = Power_Info.capacity;
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}
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void Power_GetBatteryVoltage(){
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uint32_t adc_reading = 0;
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// 多次采样求均值, 提升采样精度
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for (int i = 0; i < NO_OF_SAMPLES; i++) {
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adc_reading += adc1_get_raw((adc1_channel_t)channel);
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}
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adc_reading /= NO_OF_SAMPLES;
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// 从原始采样结果转换为mV
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uint32_t voltage = esp_adc_cal_raw_to_voltage(adc_reading, &adc_chars);
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// 转换为V
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Power_Info.voltage = (voltage) * 2;
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}
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void Power_SetEventCallback(Power_CallbackFunction_t callback)
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{
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}
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static void Power_CalBatteryCapacity(float vol){
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const int precent[] = {100, 90, 80, 70, 60, 50, 40, 30, 20, 15, 10, 5, 0};
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const float voltage[] = {4.2, 4.08, 4.00, 3.93, 3.87, 3.82, 3.79, 3.77, 3.73, 3.7, 3.68, 3.5, 3.0};
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int i = 0;
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int LEN = 13;
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for(i = 0; i < LEN; i++){
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if(vol >= voltage[i]){
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break;
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}
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}
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int offset = 0;
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// 对于非关键点的电压数据进行线性拟合
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if(i > 0 && i < LEN){
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float dv = vol - voltage[i];
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offset = (dv / (voltage[i-1] - voltage[i]))*(precent[i-1] - precent[i]);
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}
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Power_Info.capacity = precent[i] + offset;
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}
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void Power_Update(){
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/* Get Battery voltage form adc. */
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Power_GetBatteryVoltage();
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/* Calculate battery capacity. */
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Power_CalBatteryCapacity((Power_Info.voltage / 1000.0f));
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}
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