Why gpio for scl and SDA has internal pull up active

Dear Gautam,

As the I2C user manul of Tms320F indicates I need to connect the external pull up registers to 3.3 volt supply.

Then SDA and SCL lines are interconnected to various I2C devices.

Hence if I activate internal pull up of SDA and SCL pin of TMS320F28027, how it will work.

That means I need to disable pull up for scl and SDA pin

Point1: I am using 5.6kohms external pullup register with VCC 3.36 Volt . I am using 24LC256 (EEPROM).

I have done following settings for GPIO

are they right, my programm is not working.

Please guide.

EALLOW;

GpioCtrlRegs.GPAPUD.bit.GPIO28 = 1; // 1-disable pull-up for GPIO28 (SDAA)0-disable
GpioCtrlRegs.GPAPUD.bit.GPIO29 = 1; // disable pull-up for GPIO29 (SCLA)

GpioCtrlRegs.GPAQSEL2.bit.GPIO28 = 3; // Asynch input GPIO28 (SDAA)

GpioCtrlRegs.GPAQSEL2.bit.GPIO29 = 3; // Asynch input GPIO29 (SCLA)

GpioCtrlRegs.GPAMUX2.bit.GPIO28 = 2; // Configure GPIO28 for SDAA operation

GpioCtrlRegs.GPAMUX2.bit.GPIO29 = 2; // Configure GPIO29 for SCLA operation

EDIS;

Point 2: 

My clock setting of I2C are as follws The settings for 60MHZ clcok hence the I2c output frequency would be 343khz

is it write.

I2caRegs.I2CPSC.all = 6; // Prescaler - need 7-12 Mhz on module clk
#endif
I2caRegs.I2CCLKL = 10; // NOTE: must be non zero
I2caRegs.I2CCLKH = 5; // NOTE: must be non zero
//

Dear gautam,

If you don't mind can u share ur i2c code for my reference

It will be very much helpful as I am still struggling with it

Thank u

But a least can u share i2c clock and gpio settings

But a least can u share i2c clock and gpio settings

Thanks gautam for showing patience and helping me I think I have done

Dear Sir,

Communication is working one byte read and write

But if I go for multibyte read it is not working

is any special arrangement to be done for mutibyte read.