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Rockbox mail archiveSubject: Re: More aggressive Rockbox battery chargingRe: More aggressive Rockbox battery charging
From: Jerry Van Baren <gerald.vanbaren_at_smiths-aerospace.com>
Date: Mon, 7 Feb 2005 10:53:02 -0500 [IDC]Dragon wrote: >>Matthias is using a 9+v charger which, according to the FAQ, gives him >>about >>140mA current into the Archos. The problem is, this is only slightly more >>than is necessary just to run the AJR (and less than needed when the disk >>spins up). With a limit of 40% duty cycle (24/60), his charger is falling >>behind. > > > The Recorder hardware can measure both the cell voltage and the DC input > voltage, and could derive the charging current from that. Perhaps the duty > cycle should be a function of this? > > Jörg > Hi Jörg, I'm confused. 1) In adc.h I see the comment: #define ADC_EXT_POWER 7 /* The external power voltage, V=X*0.0148 */ 2) On the schematics, I see the raw power coming in, going through a 82K resistor and clamped by a zener to 2.7v. 3) In power.c, I see (cutting out the #ifdefs): bool charger_inserted(void) { /* Recorder */ return adc_read(ADC_EXT_POWER) > 0x100; } I'm having a hard time reconciling the three pieces of information. What am I missing??? Thanks, gvb _______________________________________________ http://cool.haxx.se/mailman/listinfo/rockbox Received on 2005-02-07 Page template was last modified "Tue Sep 7 00:00:02 2021" The Rockbox Crew -- Privacy Policy |