Communication of TMS 320F 28335 DSP with ADV 7184 video decoder by using I2C interface

Hi,

Did you even try modifying the code?

Regards,

Gautam

Hi,

Thank you for our reply .

I tried by modifying the TI's I2C EEPROM  example code .

Could you please give the solution for sending more than 16 bytes at a time ?

Regards

Rajesh

Hi,

Below is the sub-routine that has to be modified for sending more than 16 bytes:

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;
}

Over here: NumOfBytes, MsgBuffer are the variables that can be modified to achieve your target

Regards,

Gautam

Dear sir ,

How can i modify the buffer,that's size is !6 bytes only.

If  possible please send the example code for more than 16 bytes. 

Thanks&regards

Rajesh

Hi Rajesh,

Refer this doc. http://www.ti.com/lit/ug/sprug03b/sprug03b.pdf

According to it, at a time transmitting and reception of 16byte of data is only possible. 

Regards,

Gautam

Hi Gautam,

weather it should 16 bytes of continuous data or should be discontinuous data?

Regards

Rajesh

Rajesh, what you can do is... Use a buffer array of 16 and you can send it in burst of 16bytes. 

eg. for 24bytes: 16bytes+8bytes (appending)

This 16bytes of data would be continuous.

Regards,

Gautam