Q: How do I read the calibration constants that are saved on the EEPROM of the SFP+ timing calibration module?
A: The calibration constants can be read from page A2h as defined in SFF-8472 according to the User-EEPROM memory layout.
Up until now (January 2020) this is not yet possible with the standard WR software which only accesses page A0h. However, future WR software should be able to read these constants in order to enable plug&play calibration.
First steps towards a uniform implementation of SFP I2C functions were initiated by the LIBSFP project. Contributions to this project are very much appreciated and welcomed!
Currently the calibration constants of the SFP+ timing calibration are read using the Multi SFP crate and SaFariPark software.