hi,
I'm using the RM57L84x as the I2C master, communicating with an I2C peripheral that operates at 100kHz.
it works well at most of time,but occasionally the RM57L84x can‘t output SCL(clk)。When this phenomenon
appears,I check the Tx data has been already loaded into the Tx register I2CDXR。Power off the RM57L84x
for a while, the communication turn to normal. My i2c driver code is generated by HALCoGen 04.06.01。
the code is as follows:
uint8 writeDataToRTC(uint8 addr,uint8 cnt, uint8* data)
{
uint32 delay = 0;
/////////////////////////////////////////////////////////////// // Master Transfer Functionality // ///////////////////////////////////////////////////////////////
/* Configure address of Slave to talk to */
i2cSetSlaveAdd(i2cREG1, RTC_ADDRESS);
/* Set direction to Transmitter */
/* Note: Optional - It is done in Init */
i2cSetDirection(i2cREG1, I2C_TRANSMITTER);
/* Configure Data count */
/* Data Count + 1 ( Word Address) */
i2cSetCount(i2cREG1, cnt + 1);
/* Set mode as Master */
i2cSetMode(i2cREG1, I2C_MASTER);
/* Set Stop after programmed Count */
i2cSetStop(i2cREG1);
/* Transmit Start Condition */
i2cSetStart(i2cREG1);
/* Send the Word Address */
i2cSendByte(i2cREG1, addr);
/* Tranmit DATA_COUNT number of data in Polling mode */
i2cSend(i2cREG1, cnt, data);
/* Wait until Bus Busy is cleared */
while(i2cIsBusBusy(i2cREG1) == true);
/* Wait until Stop is detected */
while(i2cIsStopDetected(i2cREG1) == 0);
/* Clear the Stop condition */
i2cClearSCD(i2cREG1);
/* Simple Dealya before starting Next Block */
/* Depends on how quick the Slave gets ready */
for(delay=0; delay<100000; delay++);
return 1;
}
