Arduino Quick Start
2. Devices & Examples
3. M5Unified
5. Extensions & Examples
Atom DTU
Hat
Core2 Power Management AXP192
The AXP192 is a highly integrated power system management chip, encapsulated in the M5Core2 library with a series of APIs for controlling the power supply of peripheral devices.
SetLcdVoltage()
Function:
Set the screen voltage to adjust brightness. Valid range for the parameter is 2500-3300.
Syntax:
void SetLcdVoltage(uint16_t voltage);Example:
#include <M5Core2.h> void setup() { M5.begin(); //By default, "M5.begin()" will initialize the AXP192 chip M5.Lcd.fillScreen(RED);}void loop() { M5.update(); for(int i=2500; i<3300;i++){ M5.Axp.SetLcdVoltage(i); delay(10); } for(int i=3300; i>2500;i--){ M5.Axp.SetLcdVoltage(i); delay(10); }}PowerOff()
Function:
Cut off all power supplies (except for RTC).
Syntax:
void PowerOff();Example:
#include <M5Core2.h> void setup() { M5.begin(); M5.Lcd.fillScreen(RED); delay(1000);}void loop() { M5.Axp.PowerOff();}deepSleep()
Function:
Deep sleep (the program will restart from the beginning after recovery).
Syntax:
void deepSleep(uint64_t time_in_us);| Parameter | Type | Description |
|---|---|---|
| time_in_us | uint64_t | Sleep time |
Example:
#include <M5Core2.h> void setup() { M5.begin(); M5.Lcd.println("Going to deep sleep for 5 seconds."); delay(2000); M5.Axp.DeepSleep(SLEEP_SEC(5));}void loop() {}lightSleep()
Function:
Light sleep (the program will continue execution from the next line after recovery).
Syntax:
void lightSleep(uint64_t time_in_us);| Parameter | Type | Description |
|---|---|---|
| time_in_us | uint64_t | Sleep time |
Example:
#include <M5Core2.h> void setup() { M5.begin(); M5.Lcd.println("Going to light sleep for 5 seconds."); delay(2000); M5.Axp.lightSleep(SLEEP_SEC(5));}void loop() {}SetLed()
Function:
Set the built-in LED: state = 1 for on; state = 0 for off.
Syntax:
void SetLed(uint8_t state);Example:
#include <M5Core2.h> void setup() { M5.begin();}void loop() { M5.Axp.SetLed(1); delay(1000); M5.Axp.SetLed(0); delay(1000);}SetBusPowerMode()
Function:
Set BUS power mode, 0 for USB/BAT power supply, 1 for external input power supply.
Syntax:
void SetBusPowerMode( uint8_t state );Example:
#include <M5Core2.h> void setup() { M5.begin(); M5.Axp.SetBusPowerMode(0); //Set the Bus power mode for USB/BAT power supply}void loop() {}SetSpkEnable()
Function:
Set speaker power enable.
Syntax:
void SetSpkEnable(uint8_t state);Example:
#include <M5Core2.h> void setup() { M5.begin(); M5.Axp.SetSpkEnable(1); //Power on the speaker}void loop() {}SetCHGCurrent()
Function:
Set battery charging current.
Syntax:
void SetCHGCurrent(uint8_t state);GetBatVoltage()
Function:
Read battery voltage.
Syntax:
float GetBatVoltage();Example:
#include <M5Core2.h> void setup() { M5.begin();}void loop() { Serial.printf("Bat Voltage:%f\n", M5.Axp.GetBatVoltage()); delay(500);}GetBatCurrent()
Syntax:
Function:
Read battery current.
float GetBatCurrent();Example:
#include <M5Core2.h> void setup() { M5.begin();}void loop() { Serial.printf("Bat Current:%f\n", M5.Axp.GetBatCurrent()); delay(500);}GetVBusVoltage()
Function:
Read VBUS voltage.
Syntax:
float GetVBusVoltage();Example:
#include <M5Core2.h> void setup() { M5.begin();}void loop() { Serial.printf("VBus Voltage:%f\n", M5.Axp.GetVBusVoltage()); delay(500);}GetVBusCurrent()
Function:
Read VBUS current.
Syntax:
float GetVBusCurrent();Example:
#include <M5Core2.h> void setup() { M5.begin();}void loop() { Serial.printf("VBus Current:%f\n", M5.Axp.GetVBusCurrent()); delay(500);}GetTempInAXP192()
Function:
Read the temperature of the AXP192 chip.
Syntax:
float GetTempInAXP192();Example:
#include <M5Core2.h> void setup() { M5.begin();}void loop() { Serial.printf("AXP192 Temp:%f\n", M5.Axp.GetTempInAXP192()); delay(500);}GetBatPower()
Function:
Read the current power consumption of the battery.
Syntax:
float GetBatPower();Example:
#include <M5Core2.h> void setup() { M5.begin();}void loop() { Serial.printf("AXP192 Temp:%f\n", M5.Axp.GetTempInAXP192()); delay(500);}GetBatChargeCurrent()
Function:
Read battery charging current.
Syntax:
float GetBatChargeCurrent();Example:
#include <M5Core2.h> void setup() { M5.begin();}void loop() { Serial.printf("Bat Charge Current:%f\n", M5.Axp.GetBatChargeCurrent()); delay(500);}isCharging()
Function:
Check if
it is in charging state.
Syntax:
bool isCharging();Example:
#include <M5Core2.h> void setup() { M5.begin();}void loop() { Serial.printf("Charging state:%d\n", M5.Axp.isCharging()); delay(500);}