2008/1/23, Nick Kossifidis <[EMAIL PROTECTED]>: > Just commited my latest changes on ath_info (madwifi-trace branch). > > It took some time and we still have much to do (read per rate target > power levels + ctls) but we are one step closer on implementing > txpower setup. What we have is per channel power calibration data as > seen on eeprom info dumps here -> > http://www.oswave.com/mediawiki/index.php/Eeprom_output > > this output helped a lot, you can see there eg. that pwr4 = max_pwr > and also pcdac values for pwr*_x3 are standard. > > Easy part was to get frequencies (we already had some code to read > cal_piers, so i ran bin2freq on remaining offsets, doing the same > shifts and i got 8 5Ghz continuous channels (from lower to higher) at > offset 0x150. Then calibration data was just after 5Ghz channel list > (which is 10 channels long), starting as usual with 802.11a data, i > read pwr_1-3 using the same mask /shifts used for the channels and > after some more search i got the trhee pwr*_x3 (were zero in my case > anyway). Then i realized how those pcdac values were stored, after > trying various masks (i was looking for values 1-63 since that's the > range of pcdac values), first i got pcd 2-4 and then i got pcd 1. At > first i thought that i was reading pcds 1-3 but then i realized that i > was doing something wrong since values on dump are increasing while i > got decreasing values. I located pcd 1 just after pwr4_x3 and it was > also bigger than pcd 2. Then i noticed that values on the dump seem to > increase first with big steps (1->2) and then smoothing. So these > were pcdac steps actually stored on eeprom, adding them together we > get the pcdac table for the channel (that's what we see on the dump) > ;-) > > Another thing is power units, normaly we have 0.5dbm units but on the > dump we can see that we have greater accuracy, it turns out that > values in eeprom are in 0.25dbm steps and scaled up * 4. >
I also got some information about Conformance Test limits etc, check this out ;-) http://community.qnx.com/sf/sfmain/do/downloadAttachment/projects.networking/discussion.drivers.topc1801/post4292;jsessionid=CC4E7AAEF46793A3D31D73B5C9205B30?id=atch1476 -- GPG ID: 0xD21DB2DB As you read this post global entropy rises. Have Fun ;-) Nick _______________________________________________ ath5k-devel mailing list [email protected] https://lists.ath5k.org/mailman/listinfo/ath5k-devel
