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Inter-Integrated Circuit (I2C)

using ROM_I2CMasterErr(). If there are no errors, then the data has been sent or is

ready to be read using ROM_I2CMasterDataGet(). For the burst send and receive cases,

the polling method also involves calling the ROM_I2CMasterControl() function for each

byte transmitted or received (using either the I2C_MASTER_CMD_BURST_SEND_CONT

or I2C_MASTER_CMD_BURST_RECEIVE_CONT commands), and for the last byte

sent or received (using either the I2C_MASTER_CMD_BURST_SEND_FINISH or

I2C_MASTER_CMD_BURST_RECEIVE_FINISH commands). If any error is detected

during the burst transfer, the ROM_I2CMasterControl() function should be called using

the appropriate stop command (I2C_MASTER_CMD_BURST_SEND_ERROR_STOP or

I2C_MASTER_CMD_BURST_RECEIVE_ERROR_STOP).

For the interrupt-driven transaction, the user must register an interrupt handler for the I2C devices

and enable the I2C master interrupt; the interrupt will occur when the master is no longer busy.

12.2 Functions

Functions

bool ROM_I2CMasterBusBusy (uint32_t ui32Base)

bool ROM_I2CMasterBusy (uint32_t ui32Base)

void ROM_I2CMasterControl (uint32_t ui32Base, uint32_t ui32Cmd)

uint32_t ROM_I2CMasterDataGet (uint32_t ui32Base)

void ROM_I2CMasterDataPut (uint32_t ui32Base, uint8_t ui8Data)

void ROM_I2CMasterDisable (uint32_t ui32Base)

void ROM_I2CMasterEnable (uint32_t ui32Base)

uint32_t ROM_I2CMasterErr (uint32_t ui32Base)

void ROM_I2CMasterInitExpClk (uint32_t ui32Base, uint32_t ui32I2CClk, bool bFast)

void ROM_I2CMasterIntClear (uint32_t ui32Base)

void ROM_I2CMasterIntClearEx (uint32_t ui32Base, uint32_t ui32IntFlags)

void ROM_I2CMasterIntDisable (uint32_t ui32Base)

void ROM_I2CMasterIntDisableEx (uint32_t ui32Base, uint32_t ui32IntFlags)

void ROM_I2CMasterIntEnable (uint32_t ui32Base)

void ROM_I2CMasterIntEnableEx (uint32_t ui32Base, uint32_t ui32IntFlags)

bool ROM_I2CMasterIntStatus (uint32_t ui32Base, bool bMasked)

uint32_t ROM_I2CMasterIntStatusEx (uint32_t ui32Base, bool bMasked)

uint32_t ROM_I2CMasterLineStateGet (uint32_t ui32Base)

void ROM_I2CMasterSlaveAddrSet (uint32_t ui32Base, uint8_t ui8SlaveAddr, bool bReceive)

void ROM_I2CMasterTimeoutSet (uint32_t ui32Base, uint32_t ui32Value)

void ROM_UpdateI2C (void)

12.2.1 Function Documentation

12.2.1.1 ROM_I2CMasterBusBusy

Indicates whether or not the I2C bus is busy.

124 April 8, 2013

Texas Instruments Tiva TM4C123GH6PM User Manual

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