[U-Boot-Users] PQ2FADS i2c -- no SCL
Using u-boot 1.0.1 with PQ2FADS ... we're not seeing SCL while executing i2c commands. Port D settings are correct, copper is good.
Has anyone seen a similar problem? Anyone successful?
Regards, --Scott
Scott McNutt writes:
Scott> Using u-boot 1.0.1 with PQ2FADS ... we're not seeing SCL Scott> while executing i2c commands. Port D settings are correct, Scott> copper is good.
Scott> Has anyone seen a similar problem? Anyone successful?
It used to work on MPC8260ADS and MPC8266ADS. On PQ2FADS, I2C is connected to nothing so it was not tested. It's expected to be the same as on older boards. I assume you use the expansion connector to add I2C hardware. I'd check first of all that the configuration (S/W and H/W) is the same as on older boards. Specifically, your add-on H/W must take care of I2C bus requirements.
I've done a recent port of U-Boot 1.0.0 to our MPC866 card and found a change was necessary for I2C to do anything (could not get output on SCL or SDA). In the init code for I2c there was a statement which cleared rpbase to 0. The docs for the 866 indicate not to change this field! I commented it out just on a hunch and I2C works! Try that, maybe it'll help you.
Regards, Herb
At 04:01 AM 1/21/2004, you wrote:
Scott McNutt writes:
Scott> Using u-boot 1.0.1 with PQ2FADS ... we're not seeing SCL Scott> while executing i2c commands. Port D settings are correct, Scott> copper is good. Scott> Has anyone seen a similar problem? Anyone successful?It used to work on MPC8260ADS and MPC8266ADS. On PQ2FADS, I2C is connected to nothing so it was not tested. It's expected to be the same as on older boards. I assume you use the expansion connector to add I2C hardware. I'd check first of all that the configuration (S/W and H/W) is the same as on older boards. Specifically, your add-on H/W must take care of I2C bus requirements.
--
Yuli Barcohen | Phone +972-9-765-1788 | Software Project Leader yuli@arabellasw.com | Fax +972-9-765-7494 | Arabella Software, Israel ========================================================================
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participants (3)
-
Herb Radford -
Scott McNutt -
Yuli Barcohen