384 lines
12 KiB
C++
384 lines
12 KiB
C++
// Basic config
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#include "globals.h"
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#include "power.h"
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// Local logging tag
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static const char TAG[] = __FILE__;
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int8_t batt_level = -1; // percent batt level, global variable, -1 means no batt
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#ifdef BAT_MEASURE_ADC
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esp_adc_cal_characteristics_t *adc_characs =
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(esp_adc_cal_characteristics_t *)calloc(
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1, sizeof(esp_adc_cal_characteristics_t));
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#ifndef BAT_MEASURE_ADC_UNIT // ADC1
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static const adc1_channel_t adc_channel = BAT_MEASURE_ADC;
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#else // ADC2
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static const adc2_channel_t adc_channel = BAT_MEASURE_ADC;
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RTC_NOINIT_ATTR uint64_t RTC_reg_b;
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#endif
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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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#endif // BAT_MEASURE_ADC
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#ifdef HAS_PMU
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XPowersPMU pmu;
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void AXP192_powerevent_IRQ(void) {
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pmu.getIrqStatus();
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if (pmu.isVbusOverVoltageIrq())
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ESP_LOGI(TAG, "USB voltage %.2fV too high.", pmu.getVbusVoltage() / 1000);
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if (pmu.isVbusInsertIrq())
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ESP_LOGI(TAG, "USB plugged, %.2fV @ %.0mA", pmu.getVbusVoltage() / 1000,
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pmu.getVbusCurrent());
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if (pmu.isVbusRemoveIrq())
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ESP_LOGI(TAG, "USB unplugged.");
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if (pmu.isBatInsertIrq())
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ESP_LOGI(TAG, "Battery is connected.");
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if (pmu.isBatRemoveIrq())
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ESP_LOGI(TAG, "Battery was removed.");
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if (pmu.isBatChagerStartIrq())
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ESP_LOGI(TAG, "Battery charging started.");
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if (pmu.isBatChagerDoneIrq())
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ESP_LOGI(TAG, "Battery charging done.");
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if (pmu.isBattTempLowIrq())
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ESP_LOGI(TAG, "Battery high temperature.");
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if (pmu.isBattTempHighIrq())
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ESP_LOGI(TAG, "Battery low temperature.");
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// PEK button handling:
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// long press -> shutdown power, must be exited by another longpress
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if (pmu.isPekeyLongPressIrq())
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AXP192_power(pmu_power_off); // switch off Lora, GPS, display
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#ifdef HAS_BUTTON
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// short press -> esp32 deep sleep mode, must be exited by user button
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if (pmu.isPekeyShortPressIrq())
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enter_deepsleep(0, HAS_BUTTON);
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#endif
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pmu.clearIrqStatus();
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// refresh stored voltage value
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read_battlevel();
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}
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void AXP192_power(pmu_power_t powerlevel) {
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switch (powerlevel) {
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case pmu_power_off:
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pmu.setChargingLedMode(XPOWERS_CHG_LED_OFF);
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pmu.shutdown();
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break;
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case pmu_power_sleep:
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pmu.setChargingLedMode(XPOWERS_CHG_LED_CTRL_CHG);
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// we don't cut off DCDC1, because OLED display will then block i2c bus
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// pmu.disableDC1(); // OLED off
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pmu.disableLDO3(); // gps off
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pmu.disableLDO2(); // lora off
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pmu.enableSleep();
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break;
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case pmu_power_on:
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default:
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pmu.enableLDO2(); // Lora on T-Beam V1.0/1.1
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pmu.enableLDO3(); // Gps on T-Beam V1.0/1.1
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pmu.enableDC1(); // OLED on T-Beam v1.0/1.1
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pmu.setChargingLedMode(XPOWERS_CHG_LED_ON);
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break;
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}
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}
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void AXP192_showstatus(void) {
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if (pmu.isBatteryConnect())
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if (pmu.isCharging())
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ESP_LOGI(TAG, "Battery charging, %.2fV @ %.0fmAh",
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pmu.getBattVoltage() / 1000.0, pmu.getBatteryChargeCurrent());
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else
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ESP_LOGI(TAG, "Battery not charging");
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else
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ESP_LOGI(TAG, "Battery not present");
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if (pmu.isVbusIn())
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ESP_LOGI(TAG, "USB powered, %.0fmW",
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pmu.getVbusVoltage() / 1000 * pmu.getVbusCurrent());
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else
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ESP_LOGI(TAG, "USB not present");
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}
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void AXP192_init(void) {
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if (!pmu.begin(Wire, AXP192_PRIMARY_ADDRESS, SCL, SDA))
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ESP_LOGI(TAG, "AXP192 PMU initialization failed");
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else {
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ESP_LOGD(TAG, "AXP192 ChipID:0x%x", pmu.getChipID());
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// set pmu operating voltages
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pmu.setSysPowerDownVoltage(2700);
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pmu.setVbusVoltageLimit(XPOWERS_AXP192_VBUS_VOL_LIM_4V5);
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pmu.setVbusCurrentLimit(XPOWERS_AXP192_VBUS_CUR_LIM_OFF);
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// set device operating voltages
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pmu.setDC1Voltage(3300); // for external OLED display
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pmu.setLDO2Voltage(3300); // LORA VDD 3v3
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pmu.setLDO3Voltage(3300); // GPS VDD 3v3
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// configure PEK button settings
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pmu.setPowerKeyPressOffTime(XPOWERS_POWEROFF_4S);
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pmu.setPowerKeyPressOnTime(XPOWERS_POWERON_128MS);
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// set battery temperature sensing pin off to save power
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pmu.disableTSPinMeasure();
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// Enable internal ADC detection
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pmu.enableBattDetection();
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pmu.enableVbusVoltageMeasure();
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pmu.enableBattVoltageMeasure();
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pmu.enableSystemVoltageMeasure();
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#ifdef PMU_INT
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pinMode(PMU_INT, INPUT_PULLUP);
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attachInterrupt(digitalPinToInterrupt(PMU_INT), PMUIRQ, FALLING);
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// disable all interrupts
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pmu.disableIRQ(XPOWERS_AXP192_ALL_IRQ);
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// clear all interrupt flags
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pmu.clearIrqStatus();
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// enable the required interrupt function
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pmu.enableIRQ(XPOWERS_AXP192_BAT_INSERT_IRQ |
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XPOWERS_AXP192_BAT_REMOVE_IRQ | // BATTERY
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XPOWERS_AXP192_VBUS_INSERT_IRQ |
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XPOWERS_AXP192_VBUS_REMOVE_IRQ | // VBUS
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XPOWERS_AXP192_PKEY_SHORT_IRQ |
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XPOWERS_AXP192_PKEY_LONG_IRQ | // POWER KEY
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XPOWERS_AXP192_BAT_CHG_DONE_IRQ |
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XPOWERS_AXP192_BAT_CHG_START_IRQ // CHARGE
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);
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#endif // PMU_INT
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// set charging parameters according to user settings if we have (see power.h)
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#ifdef PMU_CHG_CURRENT
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pmu.setChargerConstantCurr(PMU_CHG_CURRENT);
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pmu.setChargeTargetVoltage(PMU_CHG_CUTOFF);
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pmu.enableCharge();
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#endif
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// switch power rails on
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AXP192_power(pmu_power_on);
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ESP_LOGI(TAG, "AXP192 PMU initialized");
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}
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}
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#endif // HAS_PMU
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void calibrate_voltage(void) {
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#ifdef BAT_MEASURE_ADC
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// configure ADC
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#ifndef BAT_MEASURE_ADC_UNIT // ADC1
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adc1_config_width(ADC_WIDTH_BIT_12);
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adc1_config_channel_atten(adc_channel, atten);
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#else // ADC2
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adc2_config_channel_atten(adc_channel, atten);
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// ADC2 wifi bug workaround, see
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// https://github.com/espressif/arduino-esp32/issues/102
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RTC_reg_b = READ_PERI_REG(SENS_SAR_READ_CTRL2_REG);
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#endif
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// calibrate ADC
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esp_adc_cal_value_t val_type = esp_adc_cal_characterize(
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unit, atten, ADC_WIDTH_BIT_12, DEFAULT_VREF, adc_characs);
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// show ADC characterization base
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if (val_type == ESP_ADC_CAL_VAL_EFUSE_TP) {
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ESP_LOGI(TAG,
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"ADC characterization based on Two Point values stored in eFuse");
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} else if (val_type == ESP_ADC_CAL_VAL_EFUSE_VREF) {
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ESP_LOGI(TAG,
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"ADC characterization based on reference voltage stored in eFuse");
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} else {
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ESP_LOGI(TAG, "ADC characterization based on default reference voltage");
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}
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#endif
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}
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uint16_t read_voltage(void) {
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uint16_t voltage = 0;
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#ifdef HAS_PMU
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voltage = pmu.getBattVoltage();
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#else
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#ifdef BAT_MEASURE_ADC
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// multisample ADC
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uint32_t adc_reading = 0;
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#ifndef BAT_MEASURE_ADC_UNIT // ADC1
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for (int i = 0; i < NO_OF_SAMPLES; i++) {
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adc_reading += adc1_get_raw(adc_channel);
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}
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#else // ADC2
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int adc_buf = 0;
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for (int i = 0; i < NO_OF_SAMPLES; i++) {
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// ADC2 wifi bug workaround, see
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// https://github.com/espressif/arduino-esp32/issues/102
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WRITE_PERI_REG(SENS_SAR_READ_CTRL2_REG, RTC_reg_b);
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SET_PERI_REG_MASK(SENS_SAR_READ_CTRL2_REG, SENS_SAR2_DATA_INV);
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adc2_get_raw(adc_channel, ADC_WIDTH_BIT_12, &adc_buf);
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adc_reading += adc_buf;
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}
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#endif // BAT_MEASURE_ADC_UNIT
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adc_reading /= NO_OF_SAMPLES;
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// Convert ADC reading to voltage in mV
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voltage = esp_adc_cal_raw_to_voltage(adc_reading, adc_characs);
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#endif // BAT_MEASURE_ADC
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#ifdef BAT_VOLTAGE_DIVIDER
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voltage *= BAT_VOLTAGE_DIVIDER;
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#endif // BAT_VOLTAGE_DIVIDER
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#endif // HAS_PMU
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return voltage;
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}
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int8_t read_battlevel(mapFn_t mapFunction) {
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// returns the estimated battery level in values 0 ... 100 [percent]
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uint8_t batt_percent = 0;
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#ifdef HAS_IP5306
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batt_percent = IP5306_GetBatteryLevel();
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#elif defined HAS_PMU
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batt_percent = pmu.getBatteryPercent();
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#else
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const uint16_t batt_voltage = read_voltage();
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if (batt_voltage <= BAT_MIN_VOLTAGE)
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batt_percent = 0;
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else if (batt_voltage >= BAT_MAX_VOLTAGE)
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batt_percent = 100;
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else
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batt_percent =
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(*mapFunction)(batt_voltage, BAT_MIN_VOLTAGE, BAT_MAX_VOLTAGE);
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#endif
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#if (HAS_LORA)
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// set the battery status value to send by LMIC in MAC Command
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// DevStatusAns. Available defines in lorabase.h:
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// MCMD_DEVS_EXT_POWER = 0x00, // external power supply
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// MCMD_DEVS_BATT_MIN = 0x01, // min battery value
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// MCMD_DEVS_BATT_MAX = 0xFE, // max battery value
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// MCMD_DEVS_BATT_NOINFO = 0xFF, // unknown battery level
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// we calculate the applicable value from MCMD_DEVS_BATT_MIN to
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// MCMD_DEVS_BATT_MAX from batt_percent value
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if (batt_percent == -1)
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LMIC_setBatteryLevel(MCMD_DEVS_BATT_NOINFO);
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else
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LMIC_setBatteryLevel(batt_percent / 100.0 *
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(MCMD_DEVS_BATT_MAX - MCMD_DEVS_BATT_MIN + 1));
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// overwrite calculated value if we have external power
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#ifdef HAS_PMU
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if (pmu.isVbusIn())
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LMIC_setBatteryLevel(MCMD_DEVS_EXT_POWER);
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#elif defined HAS_IP5306
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if (IP5306_GetPowerSource())
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LMIC_setBatteryLevel(MCMD_DEVS_EXT_POWER);
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#endif // HAS_PMU
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#endif // HAS_LORA
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return batt_percent;
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}
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bool batt_sufficient() {
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#if (defined HAS_PMU || defined BAT_MEASURE_ADC || defined HAS_IP5306)
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if (batt_level > 0) // we have a battery percent value
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return (batt_level > OTA_MIN_BATT);
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else
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#endif
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return true; // we don't know batt level
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}
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#ifdef HAS_IP5306
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// IP5306 code snippet was taken from
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// https://gist.github.com/me-no-dev/7702f08dd578de5efa47caf322250b57
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#define IP5306_REG_SYS_0 0x00
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#define IP5306_REG_SYS_1 0x01
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#define IP5306_REG_SYS_2 0x02
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#define IP5306_REG_CHG_0 0x20
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#define IP5306_REG_CHG_1 0x21
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#define IP5306_REG_CHG_2 0x22
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#define IP5306_REG_CHG_3 0x23
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#define IP5306_REG_CHG_4 0x24
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#define IP5306_REG_READ_0 0x70
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#define IP5306_REG_READ_1 0x71
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#define IP5306_REG_READ_2 0x72
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#define IP5306_REG_READ_3 0x77
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#define IP5306_REG_READ_4 0x78
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#define IP5306_LEDS2PCT(byte) \
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((byte & 0x01 ? 25 : 0) + (byte & 0x02 ? 25 : 0) + (byte & 0x04 ? 25 : 0) + \
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(byte & 0x08 ? 25 : 0))
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uint8_t ip5306_get_bits(uint8_t reg, uint8_t index, uint8_t bits) {
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uint8_t value;
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if (i2c_readBytes(IP5306_PRIMARY_ADDRESS, reg, &value, 1) == 0xff) {
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ESP_LOGW(TAG, "IP5306 get bits fail: 0x%02x", reg);
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return 0;
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}
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return (value >> index) & ((1 << bits) - 1);
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}
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void ip5306_set_bits(uint8_t reg, uint8_t index, uint8_t bits, uint8_t value) {
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uint8_t mask = (1 << bits) - 1, v;
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if (i2c_readBytes(IP5306_PRIMARY_ADDRESS, reg, &v, 1) == 0xff) {
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ESP_LOGW(TAG, "IP5306 register read fail: 0x%02x", reg);
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return;
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}
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v &= ~(mask << index);
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v |= ((value & mask) << index);
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if (i2c_writeBytes(IP5306_PRIMARY_ADDRESS, reg, &v, 1) == 0xff)
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ESP_LOGW(TAG, "IP5306 register write fail: 0x%02x", reg);
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}
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uint8_t IP5306_GetPowerSource(void) {
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return ip5306_get_bits(IP5306_REG_READ_0, 3, 1); // 0:BAT, 1:VIN
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}
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uint8_t IP5306_GetBatteryFull(void) {
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return ip5306_get_bits(IP5306_REG_READ_1, 3, 1); // 0:CHG/DIS, 1:FULL
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}
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uint8_t IP5306_GetBatteryLevel(void) {
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uint8_t state = (~ip5306_get_bits(IP5306_REG_READ_4, 4, 4)) & 0x0F;
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// LED[0-4] State (inverted)
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return IP5306_LEDS2PCT(state);
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}
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void IP5306_SetChargerEnabled(uint8_t v) {
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ip5306_set_bits(IP5306_REG_SYS_0, 4, 1, v); // 0:dis,*1:en
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}
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void IP5306_SetChargeCutoffVoltage(uint8_t v) {
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ip5306_set_bits(IP5306_REG_CHG_2, 2, 2,
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v); //*0:4.2V, 1:4.3V, 2:4.35V, 3:4.4V
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}
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void IP5306_SetEndChargeCurrentDetection(uint8_t v) {
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ip5306_set_bits(IP5306_REG_CHG_1, 6, 2,
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v); // 0:200mA, 1:400mA, *2:500mA, 3:600mA
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}
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void printIP5306Stats(void) {
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bool usb = IP5306_GetPowerSource();
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bool full = IP5306_GetBatteryFull();
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uint8_t level = IP5306_GetBatteryLevel();
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ESP_LOGI(TAG,
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"IP5306: Power Source: %s, Battery State: %s, Battery Level: %u%%",
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usb ? "USB" : "BATTERY",
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full ? "CHARGED" : (usb ? "CHARGING" : "DISCHARGING"), level);
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}
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void IP5306_init(void) {
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IP5306_SetChargerEnabled(1);
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IP5306_SetChargeCutoffVoltage(PMU_CHG_CUTOFF);
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IP5306_SetEndChargeCurrentDetection(PMU_CHG_CURRENT);
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}
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#endif // HAS_IP5306
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