[etherlab-users] Writing to a blank EEPROM

Aaron Edsinger edsinger at csail.mit.edu
Fri Nov 30 21:41:02 CET 2007

Great, thanks. Two related items:

* The Master doesn't seem to detect the blank EEPROM slave although the 
link is active. Can you advise what Master status variables might help 
to assess the situation?

* In reading the documentation for the Master 1.1.1, there should be a 
sysfs file named /sys/ethercat0/eeprom_write_enable. I am running Master 
1.3.1. However, under the equivalent /sys/ethercat/master0/ there is no 
such file. Where has this gone?


Florian Pose wrote:
> Hi Aaron,
> On Fri, Nov 16, 2007 at 09:35:51AM -0800, Aaron Edsinger wrote:
>> Thanks Florian. My concern is being able to write the first 40 words into a 
>> blank EEPROM using the Master. If it is unable to recognize a slave with a 
>> blank EEPROM, then how is it able to write these initial words?
> sorry, I was a bit unclear: The master will recognize and list the
> slave, but it won't know, what kind of slave it is (which is irrelevant
> for writing the EEPROM).

Aaron Edsinger, Ph.D.
San Francisco, CA

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