Hi,
i have configured the controller as I2C master and communicating with two slaves(RTC and EEPROM).
am not able to read the data from EEPROM (I have written data to the 0x0002 address).
please let me know about I2C configuration and Read and write function use.
int main()
{
CyGlobalIntEnable; /* Enable global interrupts. */
I2CMasterIntilization();
g_ucEEPROMWriteBuffer[0] = 0x00;
g_ucEEPROMWriteBuffer[1] = 0x02;
g_ucEEPROMWriteBuffer[2] = 0x05;
g_ucEEPROMWriteBuffer[3] = 0x45;
while(1)
{
WriteDataToEEPROM(3);
g_ucEEPROMWriteBuffer[0] = 0x00;
g_ucEEPROMWriteBuffer[1] = 0x02;
ReadDataFromEEPROM(2);
}
}
void I2CMasterIntilization(void)
{
I2C_Master_Start();
}
void WriteDataToEEPROM(char chDataByte)
{
I2C_Master_I2CMasterWriteBuf(EEPROM_SLAVE_ADDRESS,(unsigned char*)g_ucEEPROMWriteBuffer,chDataByte,I2C_Master_I2C_MODE_COMPLETE_XFER);
while((I2C_Master_I2CMasterStatus() & I2C_Master_I2C_MSTAT_WR_CMPLT) == LOW)
{
}
CyDelay(3);
}
void ReadDataFromEEPROM(char unNoOfDataByteNeedToReceive)
{
I2C_Master_I2CMasterWriteBuf (EEPROM_SLAVE_ADDRESS,(unsigned char *)g_ucEEPROMWriteBuffer,2,I2C_Master_I2C_MODE_COMPLETE_XFER);
//CyDelay(1000);
while((I2C_Master_I2CMasterStatus() & I2C_Master_I2C_MSTAT_WR_CMPLT) == LOW)
{
}
I2C_Master_I2CMasterReadBuf(EEPROM_SLAVE_ADDRESS,(unsigned char *)g_ucEEPROMReadBuffer,unNoOfDataByteNeedToReceive,I2C_Master_I2C_MODE_REPEAT_START);
while((I2C_Master_I2CMasterStatus() & I2C_Master_I2C_MSTAT_RD_CMPLT) == LOW)
{
}
}
if I use I2C_Master_I2C_MODE_NO_STOP while writing data from master , then clock will become low after transmitting data (SCL line is low). I used I2C_Master_I2C_MODE_COMPLETE_XFER to write the data , then wring is working fine and SCL and SDC lines are high after writing data to EEPROM.
kindly let me know about API's which I used in my coding.
please find the attached I2C module setting image.
Regards,
Ambarish BH
