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db12348e_V3.11_preliminary_2017-07-06

Page 34 of 41

AS89010

V3.11

The following pseudo code illustrates the procedures for principle program steps for functions I2C-Write

and I2C-Read.

BOOL I2cMasterSendData(BYTE I2cAddr, USHORT RegAddr, BYTE *Data, SHORT Datasize)

{

BOOL ErrReturn = (Datasize > 0) ? TRUE : FALSE;

BYTE ErrCode=0;

ULONG WaitLoop;

// clear RX

I2C_ReceiveData(I2C_INTERFACE);

// Datasize must be greater 0

while(ErrReturn==TRUE)

{

// send I2C START

I2C_GenerateSTART(I2C_INTERFACE, ENABLE);

// test for completion

if(I2cWaitEvent(I2C_EVENT_MASTER_MODE_SELECT) == FALSE)

{

ErrCode = 0x81;

ErrReturn = FALSE;

break;

}

// send I2C slave address (R/W=Write)

I2C_Send7bitAddress(I2C_INTERFACE, I2cAddr, I2C_Direction_Transmitter);

// test for completion, TXE, master mode activ, TRA

if(I2cWaitEvent(I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED) == FALSE)

{

ErrCode = 0x82;

ErrReturn = FALSE;

break;

}

// send register adress

I2C_SendData(I2C_INTERFACE, RegAddr));

// data transmission loop

while(Datasize--)

{

// wait for BTF

if(I2cWaitEvent(I2C_EVT_BTF) == FALSE)

{

ErrCode = 0x84;

ErrReturn = FALSE;

break;

}

// send data byte

I2C_SendData(I2C_INTERFACE, *Data);

// prepare next

Data++;

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