Hi Meghavi,
The source is below and is based on the example in the folder linux/testUtility that is provided by Infineon. What I am trying to do is read a register (0xA3) from device address (0x38). I am not sure how to specify the register address when I follow the example. When I test using the code below, the register bytes is never correct (i.e. not 0xA3 and it changes from one read to another) when I capture the signals on I2C bus.
int i2cTouchScreen (int deviceNumber, int interfaceNum)
{
CY_DATA_BUFFER dataBufferWrite, dataBufferRead;
CY_HANDLE handle;
int length = 0;
bool isVerify = true;
int loopCount = 100, i;
CY_RETURN_STATUS rStatus;
unsigned char bytesPending = 0, address[2], wbuffer[66], rbuffer[66];
CY_I2C_DATA_CONFIG i2cDataConfig;
memset (wbuffer, 0, 66);
memset (rbuffer, 0, 66);
i2cDataConfig.isStopBit = true;
i2cDataConfig.slaveAddress = 0x38;
rStatus = CyOpen (deviceNumber, interfaceNum, &handle);
if (rStatus != CY_SUCCESS){
printf("CY_I2C: Open failed %d \n",rStatus);
return rStatus;
}
rbuffer[0]= 0xA3;
rbuffer[1] = 0;
i2cDataConfig.isStopBit = true;
i2cDataConfig.isNakBit = true;
dataBufferRead.length = 1 ;
dataBufferRead.buffer = rbuffer;
rStatus = CyI2cRead (handle, &i2cDataConfig, &dataBufferRead, 5000);
if (rStatus != CY_SUCCESS){
printf ("Error doing i2c read ... Error is %d \n", rStatus);
CyClose (handle);
return -1;
}
printf ("\n Data that is read from i2c ...%d\n",dataBufferRead.length);
printf ("\n-----------------------------------------------------------------\n");
for (rStatus = 0; rStatus < 3; rStatus++){
printf ("%x ", rbuffer[rStatus]);
}
CyClose (handle);
}
