User`s manual

122 Reference Manual

GPIO.

1. IAccessFunc::I2C_WriteRegister

The I2C_WriteRegister method writes a single I2C register.

Syntax

HRESULT I2C_WriteRegister(

unsigned char DevAddr,

int AddrWidth,

unsigned short RegAddr,

unsigned char RegValue,

int I2CMode

);

Parameters

DevAddr: [In] Device address.

AddrWidth: [In] Length of register address, in bits. Typical val-

ues can either be 8 or 16.

RegAddr: [In] Register address. If its higher byte is 0, the reg-

ister is considered to have an 8-bit address; otherwise, the

address length is 16 bits.

RegValue: [In] Value to be written to the I

C register.

I2Cmode: [In] I

C mode. The value can be set at:

X 0x0000: Use I

C protocol via on chip I

C controller.

X 0x0001: Use SCCB protocol via on chip I

C controller.

X 0x8000: Use I

C protocol via Cypress I

C controller.

Return Value

HRESULT