I2C

• Functions
  • writeCommand
  • writeByte
  • writeBytes
  • readByte
  • readBytes
  • scanID

Using the M5Stack library's encapsulated I2C communication API to access slave devices. Initialization is required through Wire.begin(21, 22); before use. PORT-A pins (G21,G22) are used by default.

writeCommand

Function:

Write a command to a specified slave device.

Function Prototype:

bool writeCommand(uint8_t address, uint8_t subAddress)

Return Value:

writeByte

Function:

Write a byte to a specified register address.

Function Prototype: bool writeByte(uint8_t address, uint8_t subAddress, uint8_t data)

Return Value:

writeBytes

Function:

Write multiple bytes to a specified register address.

Function Prototype: bool writeBytes(uint8_t address, uint8_t subAddress, uint8_t *data, uint8_t length)

Return Value:

readByte

Function Overloading

Function:

Read a byte from a specified slave address.

Function Prototype: bool readByte(uint8_t address, uint8_t *result)

Return Value:

Function:

Read a byte from a specified register address.

Function Prototype:

bool readByte(uint8_t address, uint8_t subAddress, uint8_t *result)

Return Value:

readBytes

Function Overloading

Function:

Read multiple bytes from a specified slave address.

Function Prototype:

bool readBytes(uint8_t address, uint8_t count, uint8_t *dest)

Return Value:

Function:

Read multiple bytes from a specified register address.

Function Prototype:

bool readBytes(uint8_t address, uint8_t subAddress, uint8_t count, uint8_t *dest)

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