C2000 I2c Write Function

Hi Kenton,

Assuming you have a F28335 mcu and you are interfacing it with an EEPROM; here's how i2c write is implemented :

Uint16 I2CA_WriteData(struct I2CMSG *msg)
{
Uint16 i;

// Wait until the STP bit is cleared from any previous master communication.
// Clearing of this bit by the module is delayed until after the SCD bit is
// set. If this bit is not checked prior to initiating a new message, the
// I2C could get confused.
if (I2caRegs.I2CMDR.bit.STP == 1)
{
return I2C_STP_NOT_READY_ERROR;
}

// Setup slave address
I2caRegs.I2CSAR = msg->SlaveAddress;

// Check if bus busy
if (I2caRegs.I2CSTR.bit.BB == 1)
{
return I2C_BUS_BUSY_ERROR;
}

// Setup number of bytes to send
// MsgBuffer + Address
I2caRegs.I2CCNT = msg->NumOfBytes+2;

// Setup data to send
I2caRegs.I2CDXR = msg->MemoryHighAddr;
I2caRegs.I2CDXR = msg->MemoryLowAddr;
// for (i=0; i<msg->NumOfBytes-2; i++)
for (i=0; i<msg->NumOfBytes; i++)

{
I2caRegs.I2CDXR = *(msg->MsgBuffer+i);
}

// Send start as master transmitter
I2caRegs.I2CMDR.all = 0x6E20;

return I2C_SUCCESS;
}

Regards,

Gautam

I have a C2803 and I am interfacing with an encoder device (Slave address @ 0x40).  

This routine looks similar to the I2C_eeprom example.  I was not able to get your code or the I2c_eeprom to work with my device.