TPS65987D: I2C3 configuration

David Mckinney

Part Number: TPS65987D
Other Parts Discussed in Thread: TPS65987

I'm trying to configure the TPS65987DDH with I2C master transactions to program peripheral mux'es and re-drivers. Currently we have configured I2C1 and I2C3 as master buses and both have devices connected to it.

I believe I have configured the profile correctly to send I2C messages on certain events. I see that I2C1 bus is sending some messages on these events (Power On Reset is the basic one) but I2C3 Master is not sending anything, I dont see any activity on SCL or SDA. We've checked hardware and everything checks out (pull-ups etc).

I'm sharing the profile that I have, can you help understand why I2C3 is not sending out any messages?

tps65987_ml2_v1_sanitized.pjt

over 5 years ago

0 Prajith Cheerakkoda over 5 years ago

TI__Expert 8740 points

Hi David,

Please try the pjt file attached and let me know the result.

tps65987_ml2_v1_sanitized_PRJI.pjt

Thanks
Prajith

0 David Mckinney over 5 years ago in reply to Prajith Cheerakkoda

TI__Expert 6860 points

Hi Prajith;

Thank you! We verified the attached configuration worked. Can you advise what needed to be changed in order to get the I2C3 operating?

0 Prajith Cheerakkoda over 5 years ago in reply to David Mckinney

TI__Expert 8740 points

Hi David,

Glad to know that its working now.

GPIO_OE bit was not enabled for this GPIO. Was tps65987_ml2_v1_sanitized.pjt created using a different GUI and imported that into the new GUI (where you are seeing the issue)?

Thanks
Prajith