Hi team,
Here's an issue from the customer may need your help:
1) The I2C pins are already selected in the pinmux:
2) In I2C configuration, enable the I2C pin as I2C function:
3) There is a external 2.2K pull-up resistor.
4) After sending one byte of data, the start signal is monitored by an oscilloscope, but the end signal is not monitored. After a 1s interval, when a byte is sent again, the program is found to be stuck at
While(i2cIsStopDetected(i2cREG1) = = 0);
The transmit code for the function is as follows:
void i2c_send_test(void)
{
int32_t delay=0;
/* Configure address of Slave to talk to */
i2cSetSlaveAdd(i2cREG1, Slave_Address);
/* Set direction to Transmitter */
/* Note: Optional - It is done in Init */
i2cSetDirection(i2cREG1, I2C_TRANSMITTER);
/* Configure Data count */
/* Note: Optional - It is done in Init, unless user want to change */
i2cSetCount(i2cREG1, 1);
/* Set mode as Master */
i2cSetMode(i2cREG1, I2C_MASTER);
/* Set Stop after programmed Count */
i2cSetStop(i2cREG1);
/* Transmit Start Condition */
i2cSetStart(i2cREG1);
/* Tranmit DATA_COUNT number of data in Polling mode */
i2cSend(i2cREG1, 1, TX_Data_Master);
/* 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<1000000;delay++);
}
5) The waveform signal captured by the oscilloscope is as follows:
6) The program simulating I2C through GPIO can correctly read the data from the slave DS1339.
Could you help check this case? Thanks.
Best Regards,
Cherry
