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2. Devices & Examples
3. M5Unified
5. Extensions & Examples
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Core2 System Functions
Class Name: M5
begin()
Function:
Initialize LCD; initialize SD card; clear serial buffer, set serial baud rate to 115200; initialize I2C; set MBus mode; initialize Axp power management chip; initialize touch function; initialize RTC.
Syntax:
void begin(bool LCDEnable = true, bool SDEnable = true, bool SerialEnable = true, bool I2CEnable = false, mbus_mode_t mode = kMBusModeOutput);Function Implementation:
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void M5Core2::begin(bool LCDEnable, bool SDEnable, bool SerialEnable, bool I2CEnable, mbus_mode_t mode) { // Correct init once if (isInited == true) { return; } else { isInited = true; } // UART if (SerialEnable == true) { Serial.begin(115200); Serial.flush(); delay(50); Serial.print("M5Core2 initializing..."); } // I2C init if (I2CEnable == true) { Wire.begin(32, 33); } Axp.begin(mode); // LCD INIT if (LCDEnable == true) { Lcd.begin(); } // Touch init Touch.begin(); // Touch begin after AXP begin. (Reset at the start of AXP) // TF Card if (SDEnable == true) { SD.begin(TFCARD_CS_PIN, SPI, 40000000); } // TONE if (SerialEnable == true) { Serial.println("OK"); } Rtc.begin();}Example:
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#include <M5Core2.h> void setup() { M5.begin();}update()
Function:
Read the state of the buttons.
Syntax:
void update();Function Implementation:
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void M5Core2::update() { Touch.update(); Buttons.update(); yield();}Example:
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#include <M5Core2.h> void setup() { M5.begin();} void loop() { M5.update();}shutdown()
Overload 1:
Turn off the power, wake up again using the PWR button.
void shutdown();Overload 2:
Turn off the power, wake up after the specified number of seconds using RTC.
int shutdown( int seconds );Overload 3:
Turn off the power, wake up at the specified time using RTC.
int shutdown( const RTC_TimeTypeDef &RTC_TimeStruct);Overload 4:
Turn off the power, wake up at the specified time and date using RTC.
int shutdown( const RTC_DateTypeDef &RTC_DateStruct, const RTC_TimeTypeDef &RTC_TimeStruct);Example:
cpp
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#include <M5Core2.h> RTC_TimeTypeDef RTCtime;RTC_TimeTypeDef RTCtime_Now; char timeStrbuff[64]; void setup(){ M5.begin(true,true,true,true); RTCtime.Hours = 10; RTCtime.Minutes = 30; RTCtime.Seconds = 45; M5.Lcd.setCursor(0,80); M5.Lcd.println(""); M5.Lcd.println("BtnA: shutdown, use power button to turn back on"); M5.Lcd.println(""); M5.Lcd.println("BtnB: shutdown, wake up after 5 seconds"); M5.Lcd.println(""); M5.Lcd.println("BtnC: shutdown, wake up at RTC Time 10:30:45");} void loop(){ M5.update(); if(M5.BtnA.wasPressed()){ M5.shutdown(); }else if(M5.BtnB.wasPressed()){ M5.shutdown(5); }else if(M5.BtnC.wasPressed()){ M5.shutdown(RTCtime); } M5.Lcd.setCursor(0,140); M5.Rtc.GetTime(&RTCtime_Now); sprintf(timeStrbuff,"RTC Time Now is %02d:%02d:%02d", RTCtime_Now.Hours,RTCtime_Now.Minutes,RTCtime_Now.Seconds); M5.Lcd.println(timeStrbuff);}