#if BOARD_MODEL == BOARD_TBEAM
#include <axp20x.h>
AXP20X_Class PMU;
#define BAT_V_MIN 3.15
#define BAT_V_MAX 4.14
void disablePeripherals() {
PMU.setPowerOutPut(AXP192_DCDC1, AXP202_OFF);
PMU.setPowerOutPut(AXP192_LDO2, AXP202_OFF);
PMU.setPowerOutPut(AXP192_LDO3, AXP202_OFF);
}
#elif BOARD_MODEL == BOARD_RNODE_NG_21 || BOARD_MODEL == BOARD_LORA32_V2_1
#define BAT_C_SAMPLES 7
#define BAT_D_SAMPLES 2
#define BAT_V_MIN 3.15
#define BAT_V_MAX 4.3
#define BAT_V_CHG 4.48
#define BAT_V_FLOAT 4.33
#define BAT_SAMPLES 5
const uint8_t pin_vbat = 35;
float bat_p_samples[BAT_SAMPLES];
float bat_v_samples[BAT_SAMPLES];
uint8_t bat_samples_count = 0;
int bat_discharging_samples = 0;
int bat_charging_samples = 0;
int bat_charged_samples = 0;
bool bat_voltage_dropping = false;
float bat_delay_v = 0;
#endif
uint32_t last_pmu_update = 0;
uint8_t pmu_target_pps = 1;
int pmu_update_interval = 1000/pmu_target_pps;
void measure_battery() {
#if BOARD_MODEL == BOARD_RNODE_NG_21 || BOARD_MODEL == BOARD_LORA32_V2_1
battery_installed = true;
battery_indeterminate = true;
bat_v_samples[bat_samples_count%BAT_SAMPLES] = (float)(analogRead(pin_vbat)) / 4095*2*3.3*1.1;
bat_p_samples[bat_samples_count%BAT_SAMPLES] = ((battery_voltage-BAT_V_MIN) / (BAT_V_MAX-BAT_V_MIN))*100.0;
bat_samples_count++;
if (!battery_ready && bat_samples_count >= BAT_SAMPLES) {
battery_ready = true;
}
if (battery_ready) {
battery_percent = 0;
for (uint8_t bi = 0; bi < BAT_SAMPLES; bi++) {
battery_percent += bat_p_samples[bi];
}
battery_percent = battery_percent/BAT_SAMPLES;
battery_voltage = 0;
for (uint8_t bi = 0; bi < BAT_SAMPLES; bi++) {
battery_voltage += bat_v_samples[bi];
}
battery_voltage = battery_voltage/BAT_SAMPLES;
if (bat_delay_v == 0) bat_delay_v = battery_voltage;
if (battery_percent > 100.0) battery_percent = 100.0;
if (battery_percent < 0.0) battery_percent = 0.0;
if (bat_samples_count%BAT_SAMPLES == 0) {
if (battery_voltage < bat_delay_v && battery_voltage < BAT_V_FLOAT) {
bat_voltage_dropping = true;
} else {
bat_voltage_dropping = false;
}
bat_samples_count = 0;
}
if (bat_voltage_dropping && battery_voltage < BAT_V_FLOAT) {
battery_state = BATTERY_STATE_DISCHARGING;
} else {
#if BOARD_MODEL == BOARD_RNODE_NG_21
battery_state = BATTERY_STATE_CHARGING;
#else
battery_state = BATTERY_STATE_DISCHARGING;
#endif
}
// if (bt_state == BT_STATE_CONNECTED) {
// SerialBT.printf("Bus voltage %.3fv. Unfiltered %.3fv.", battery_voltage, bat_v_samples[BAT_SAMPLES-1]);
// if (bat_voltage_dropping) {
// SerialBT.printf(" Voltage is dropping. Percentage %.1f%%.\n", battery_percent);
// } else {
// SerialBT.print(" Voltage is not dropping.\n");
// }
// }
}
#elif BOARD_MODEL == BOARD_TBEAM
float discharge_current = PMU.getBattDischargeCurrent();
float charge_current = PMU.getBattChargeCurrent();
battery_voltage = PMU.getBattVoltage()/1000.0;
// battery_percent = PMU.getBattPercentage()*1.0;
battery_installed = PMU.isBatteryConnect();
external_power = PMU.isVBUSPlug();
float ext_voltage = PMU.getVbusVoltage()/1000.0;
float ext_current = PMU.getVbusCurrent();
if (battery_installed) {
if (PMU.isChargeing()) {
battery_state = BATTERY_STATE_CHARGING;
battery_percent = ((battery_voltage-BAT_V_MIN) / (BAT_V_MAX-BAT_V_MIN))*100.0;
} else {
if (discharge_current > 0.0) {
battery_state = BATTERY_STATE_DISCHARGING;
battery_percent = ((battery_voltage-BAT_V_MIN) / (BAT_V_MAX-BAT_V_MIN))*100.0;
} else {
battery_state = BATTERY_STATE_CHARGED;
battery_percent = 100.0;
}
}
} else {
battery_state = BATTERY_STATE_DISCHARGING;
battery_percent = 0.0;
battery_voltage = 0.0;
}
if (battery_percent > 100.0) battery_percent = 100.0;
if (battery_percent < 0.0) battery_percent = 0.0;
float charge_watts = battery_voltage*(charge_current/1000.0);
float discharge_watts = battery_voltage*(discharge_current/1000.0);
float ext_watts = ext_voltage*(ext_current/1000.0);
battery_ready = true;
// if (bt_state == BT_STATE_CONNECTED) {
// if (battery_installed) {
// if (external_power) {
// SerialBT.printf("External power connected, drawing %.2fw, %.1fmA at %.1fV\n", ext_watts, ext_current, ext_voltage);
// } else {
// SerialBT.println("Running on battery");
// }
// SerialBT.printf("Battery percentage %.1f%%\n", battery_percent);
// SerialBT.printf("Battery voltage %.2fv\n", battery_voltage);
// // SerialBT.printf("Temperature %.1f%\n", auxillary_temperature);
// if (battery_state == BATTERY_STATE_CHARGING) {
// SerialBT.printf("Charging with %.2fw, %.1fmA at %.1fV\n", charge_watts, charge_current, battery_voltage);
// } else if (battery_state == BATTERY_STATE_DISCHARGING) {
// SerialBT.printf("Discharging at %.2fw, %.1fmA at %.1fV\n", discharge_watts, discharge_current, battery_voltage);
// } else if (battery_state == BATTERY_STATE_CHARGED) {
// SerialBT.printf("Battery charged\n");
// }
// } else {
// SerialBT.println("No battery installed");
// }
// SerialBT.println("");
// }
#endif
}
void update_pmu() {
if (millis()-last_pmu_update >= pmu_update_interval) {
measure_battery();
last_pmu_update = millis();
}
}
bool init_pmu() {
#if BOARD_MODEL == BOARD_RNODE_NG_21 || BOARD_MODEL == BOARD_LORA32_V2_1
pinMode(pin_vbat, INPUT);
return true;
#elif BOARD_MODEL == BOARD_TBEAM
Wire.begin(I2C_SDA, I2C_SCL);
if (PMU.begin(Wire, AXP192_SLAVE_ADDRESS) == AXP_FAIL) return false;
// Configure charging indicator
PMU.setChgLEDMode(AXP20X_LED_OFF);
// Turn off unused power sources to save power
PMU.setPowerOutPut(AXP192_DCDC1, AXP202_OFF);
PMU.setPowerOutPut(AXP192_DCDC2, AXP202_OFF);
PMU.setPowerOutPut(AXP192_LDO2, AXP202_OFF);
PMU.setPowerOutPut(AXP192_LDO3, AXP202_OFF);
PMU.setPowerOutPut(AXP192_EXTEN, AXP202_OFF);
// Set the power of LoRa and GPS module to 3.3V
PMU.setLDO2Voltage(3300); //LoRa VDD
PMU.setLDO3Voltage(3300); //GPS VDD
PMU.setDCDC1Voltage(3300); //3.3V Pin next to 21 and 22 is controlled by DCDC1
PMU.setPowerOutPut(AXP192_DCDC1, AXP202_ON);
// Turn on SX1276
PMU.setPowerOutPut(AXP192_LDO2, AXP202_ON);
// Turn off GPS
PMU.setPowerOutPut(AXP192_LDO3, AXP202_OFF);
pinMode(PMU_IRQ, INPUT_PULLUP);
attachInterrupt(PMU_IRQ, [] {
// pmu_irq = true;
}, FALLING);
PMU.adc1Enable(AXP202_VBUS_VOL_ADC1 |
AXP202_VBUS_CUR_ADC1 |
AXP202_BATT_CUR_ADC1 |
AXP202_BATT_VOL_ADC1,
AXP202_ON);
PMU.enableIRQ(AXP202_VBUS_REMOVED_IRQ |
AXP202_VBUS_CONNECT_IRQ |
AXP202_BATT_REMOVED_IRQ |
AXP202_BATT_CONNECT_IRQ,
AXP202_ON);
PMU.clearIRQ();
return true;
#else
return false;
#endif
}