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Rockbox mail archiveSubject: Re: It works ;)Re: It works ;)
From: Fred <speed-up_at_fr.st>
Date: Thu, 13 Feb 2003 19:52:54 +0100 > Someone has to measure (real_voltage, AN6 value) pairs. When is somebody doing this? I cannot help before this is done. > > Bye, Uwe. What does the graph looks like ? How many measures would you need ? Can you interpolate from 3 or 4 values ? I'll try to make a little values table tonight, using the debug menu, and encourage other FM users to do so. I allready fixed the max voltage at 3.2V even if the max I reached was 3.11V at full charge. The min value should be about 2.2, and when I play an MP3 file near battery's end I'm at 2.4V (2.2 values are reached when there are some disk access, I even saw 2.0V values ...) Here are some fresh values : VOLT - AN6 2.24 15C 2.32 167 2.82 1B5 2.90 1C2 Other FM users should send their ones, in order to see if we get the same values (my battery seems a bit damaged) Another thing : why is the Charge Control activated in the latest CVS Rockbox version ? Shouldn't be I've read somewhere in the newsgroup : what's your opinion ? Fred PS : how do you calculate the BATTERY_SCALE_FACTOR value ? I can see : level = (adc_read(ADC_UNREG_POWER) * BATTERY_SCALE_FACTOR) / 10000; This means, the voltage would be read from the AN6 value, with a scale/10000 factor : is the level still an hexadecimal value ?!? For instance : if the AN6 value is 200 by full charge, means 3.1V, I could have the scale factor with 310*10000/decimal(200) ? Received on 2003-02-13 Page template was last modified "Tue Sep 7 00:00:02 2021" The Rockbox Crew -- Privacy Policy |