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Rockbox mail archiveSubject: Re[2]: I, battery man ;-) (was: Question to powermgm.c charging algorithm)Re[2]: I, battery man ;-) (was: Question to powermgm.c charging algorithm)
From: Uwe Freese <mail_at_uwe-freese.de>
Date: Mon, 12 Aug 2002 17:21:00 +0200 Hello Heikki, Heikki Hannikainen wrote on Monday, August 12, 2002, 3:58:14 PM: HH> The device is not powered from the charger unless the charger is HH> connected to the batteries (charging enabled). Hm. Understood. >> - Charging algorithm 1 that can be used while using rockbox. Mainly a >> simple trickle (if lower than x volts, turn on charging power). >> x adjustable in menu (maybe only two values as it's now). >> - Charging algorithm 2 that is started from inside the menu. The user >> starts it and the AJB does a complete charging. The battery has to >> be < 50% full for this (check voltage before). AJB cannot be used in >> parallel when charging. The charging status is displayed with a >> curve, time, voltage and everything that is interesting or even >> useful. ;) HH> I don't see why the charging should be started in the menu. After the I thought that doing a complete charging and without using AJB in parallel (for playing music), the parameters of the algorithm or the algorithm itself would be different. (For ex. a smaller delta peak value.) Now I think it's best to make only one charging algorithm as it is now. But: It could help to set variables "battery_was_empty" and "ajb_unused" that can be used for the detection of the end of the charging. For example: if ((ajb_unused && delta < -0.01) || (delta < -0.05)) HH> All of this can be seen in firmware/powermgmt.c and apps/debug_menu.c's HH> view_battery(). The power thread cannot directly write to the LCD without HH> messing up with whatever is currently running there, so it updates a HH> global char[] variable and the foreground applications (the status bar, HH> view_battery() etc) display them. How about adding a status string of the charger thread to the battery status display in the debug menu? It would be helpful for testing a charging algorithm to see what it actually does! But I don't know how I can do that. - Thanks for your hints. I'll look into the actual cvs code this evening and test a little bit. Bye, Uwe. Received on 2002-08-12 Page template was last modified "Tue Sep 7 00:00:02 2021" The Rockbox Crew -- Privacy Policy |