PCF 8575 interface with TMS320F28069

Hi Sagar,

I would like you to go through these links:

http://e2e.ti.com/support/microcontrollers/hercules/f/312/t/242097.aspx

http://e2e.ti.com/support/microcontrollers/hercules/f/312/t/260007.aspx

Regards,

Gautam

Hi Gautam,

Thanks, for the support.

 I try out as per explanation in the link but I can't able to read the data of PCF8575. I am using sample program of eeprom for PCF8575 interfacing. Please find attached file of same program file .

Hi Gautam,

  Please  note that I am doing interfacing without using INT pin of PCF8575.

Regards,

Sagar 

Hi Sagar,

Will revert soon. Till then keep working.

Regards,

Gautam

Hi Gautam,

 Thanks for your continued support.

 Now I am able to read data of both the ports.I have still one query  that for read we have to set Last bit of slave address to 1,but for sample code it is not required to set the bit.

Hey Sagar,

Nice to know you're able to successfully communicate.

Check this link out for your later query: http://processors.wiki.ti.com/index.php/I2C_Tips 

Regards,

Gautam

Hi Gautam,

Now I am trying to Interface PCF8575 using I2C2A of Controller  i.e. GPIO32 & GPIO33. I configured GPIO 32 & 33 to I2C and Pie Ctrl register & Pie vector table to I2C2A .I keep it ISR and other function same as previous.Please Let me know is any other changes is required.

Regards,

Sagar

Hi Sagar,

Follow in the footsteps of the sample code and its respective initialization; you'll surely achieve the target.

Regards,

Gautam

Hi Gautam,

       Thanks for support.

        I have done mistake in initialization. Now I can read & write the data.

Regards,

Sagar Yadav.

That's great.

Cheers,

Gautam