N900 Hardware Charge Meter - Revision history

188.194.7.67: /* Software */ removed old obsolete info ~~Joerg

2017-10-16T12:24:28Z

Software: removed old obsolete info ~~Joerg

← Older revision		Revision as of 12:24, 16 October 2017
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	Now on kernel mailinglist is series of patches which improve (report more properties about battery then BME) kernel driver bq27x00_battery. All these issues are fixed. Backported patches for N900 are here: http://talk.maemo.org/showpost.php?p=925980&postcount=674		Now on kernel mailinglist is series of patches which improve (report more properties about battery then BME) kernel driver bq27x00_battery. All these issues are fixed. Backported patches for N900 are here: http://talk.maemo.org/showpost.php?p=925980&postcount=674

-	As of now (2011-10-20) this kernel module still isn't fixed for good and introduced massive problems by either exclusively opening I2C bus so bme couldn't work anymore when started after this module got loaded, or the patch introduced with powerkernel-48 thoroughly messed up '''all I2C''' on the system, thus creating possible race conditions that may even destroy your hardware.

	There's a [[N900_Hardware_Charge_Meter/bq-script\|script]] and acompanying I2Ctools to read out the complete info from bq27200: http://enivax.net/jk/n900/bq.tar (thanks ShadowJK)		There's a [[N900_Hardware_Charge_Meter/bq-script\|script]] and acompanying I2Ctools to read out the complete info from bq27200: http://enivax.net/jk/n900/bq.tar (thanks ShadowJK)
-	Or you can use Joerg_rw's original bq27k-~~detail~~ script ~~(needs bash, originally built for OM NEO FR: http://people~~.~~openmoko.org/joerg/battery/bq27k-detail), with this cmdline:~~	+	Or you can use Joerg_rw's original bq27k-detail2 script.
-	~~<pre>i2cdump -y 2 0x55 b\|tail -n +2\|cut -d " " -f 2-17\|./bq27k-detail " "</pre>~~	+
	New version available at http://people.openmoko.org/joerg/battery/bq27k-detail2 works (with bash and i2c-tools installed) without any cmdline acrobatics, on OM FR and stock N900 (no broken bq27200.ko kernel module and thus no power kernel needed. Might even fail on some powerkernel versions when that module got loaded)		New version available at http://people.openmoko.org/joerg/battery/bq27k-detail2 works (with bash and i2c-tools installed) without any cmdline acrobatics, on OM FR and stock N900 (no broken bq27200.ko kernel module and thus no power kernel needed. Might even fail on some powerkernel versions when that module got loaded)
	[[Category:N900 Hardware]]		[[Category:N900 Hardware]]

rdorsch: /* Software */ typo fixed

2011-12-31T14:35:43Z

Software: typo fixed

← Older revision		Revision as of 14:35, 31 December 2011
Line 27:		Line 27:
	Or you can use Joerg_rw's original bq27k-detail script (needs bash, originally built for OM NEO FR: http://people.openmoko.org/joerg/battery/bq27k-detail), with this cmdline:		Or you can use Joerg_rw's original bq27k-detail script (needs bash, originally built for OM NEO FR: http://people.openmoko.org/joerg/battery/bq27k-detail), with this cmdline:
	<pre>i2cdump -y 2 0x55 b\|tail -n +2\|cut -d " " -f 2-17\|./bq27k-detail " "</pre>		<pre>i2cdump -y 2 0x55 b\|tail -n +2\|cut -d " " -f 2-17\|./bq27k-detail " "</pre>
-	New version available at http://people.openmoko.org/joerg/battery/bq27k-detail2 works (with bash and ~~i2ctools~~ installed) without any cmdline acrobatics, on OM FR and stock N900 (no broken bq27200.ko kernel module and thus no power kernel needed. Might even fail on some powerkernel versions when that module got loaded)	+	New version available at http://people.openmoko.org/joerg/battery/bq27k-detail2 works (with bash and i2c-tools installed) without any cmdline acrobatics, on OM FR and stock N900 (no broken bq27200.ko kernel module and thus no power kernel needed. Might even fail on some powerkernel versions when that module got loaded)
	[[Category:N900 Hardware]]		[[Category:N900 Hardware]]

joerg_rw: /* Software */ bq27k-detail2

2011-10-21T13:52:11Z

Software: bq27k-detail2

← Older revision		Revision as of 13:52, 21 October 2011
Line 27:		Line 27:
	Or you can use Joerg_rw's original bq27k-detail script (needs bash, originally built for OM NEO FR: http://people.openmoko.org/joerg/battery/bq27k-detail), with this cmdline:		Or you can use Joerg_rw's original bq27k-detail script (needs bash, originally built for OM NEO FR: http://people.openmoko.org/joerg/battery/bq27k-detail), with this cmdline:
	<pre>i2cdump -y 2 0x55 b\|tail -n +2\|cut -d " " -f 2-17\|./bq27k-detail " "</pre>		<pre>i2cdump -y 2 0x55 b\|tail -n +2\|cut -d " " -f 2-17\|./bq27k-detail " "</pre>
-		+	New version available at http://people.openmoko.org/joerg/battery/bq27k-detail2 works (with bash and i2ctools installed) without any cmdline acrobatics, on OM FR and stock N900 (no broken bq27200.ko kernel module and thus no power kernel needed. Might even fail on some powerkernel versions when that module got loaded)
	[[Category:N900 Hardware]]		[[Category:N900 Hardware]]

joerg_rw at 13:02, 20 October 2011

2011-10-20T13:02:26Z

← Older revision		Revision as of 13:02, 20 October 2011
Line 25:		Line 25:

	There's a [[N900_Hardware_Charge_Meter/bq-script\|script]] and acompanying I2Ctools to read out the complete info from bq27200: http://enivax.net/jk/n900/bq.tar (thanks ShadowJK)		There's a [[N900_Hardware_Charge_Meter/bq-script\|script]] and acompanying I2Ctools to read out the complete info from bq27200: http://enivax.net/jk/n900/bq.tar (thanks ShadowJK)
-	Or you can use Joerg_rw's original bq27k-detail script (needs bash, originally built for OM NEO FR), with this cmdline:	+	Or you can use Joerg_rw's original bq27k-detail script (needs bash, originally built for OM NEO FR: http://people.openmoko.org/joerg/battery/bq27k-detail), with this cmdline:
	<pre>i2cdump -y 2 0x55 b\|tail -n +2\|cut -d " " -f 2-17\|./bq27k-detail " "</pre>		<pre>i2cdump -y 2 0x55 b\|tail -n +2\|cut -d " " -f 2-17\|./bq27k-detail " "</pre>

	[[Category:N900 Hardware]]		[[Category:N900 Hardware]]

joerg_rw: bq27k-detail

2011-10-20T13:01:42Z

bq27k-detail

← Older revision		Revision as of 13:01, 20 October 2011
Line 25:		Line 25:

	There's a [[N900_Hardware_Charge_Meter/bq-script\|script]] and acompanying I2Ctools to read out the complete info from bq27200: http://enivax.net/jk/n900/bq.tar (thanks ShadowJK)		There's a [[N900_Hardware_Charge_Meter/bq-script\|script]] and acompanying I2Ctools to read out the complete info from bq27200: http://enivax.net/jk/n900/bq.tar (thanks ShadowJK)
		+	Or you can use Joerg_rw's original bq27k-detail script (needs bash, originally built for OM NEO FR), with this cmdline:
		+	<pre>i2cdump -y 2 0x55 b\|tail -n +2\|cut -d " " -f 2-17\|./bq27k-detail " "</pre>

	[[Category:N900 Hardware]]		[[Category:N900 Hardware]]

joerg_rw: state of bq27200.ko

2011-10-20T12:25:33Z

state of bq27200.ko

← Older revision		Revision as of 12:25, 20 October 2011
Line 21:		Line 21:

	Now on kernel mailinglist is series of patches which improve (report more properties about battery then BME) kernel driver bq27x00_battery. All these issues are fixed. Backported patches for N900 are here: http://talk.maemo.org/showpost.php?p=925980&postcount=674		Now on kernel mailinglist is series of patches which improve (report more properties about battery then BME) kernel driver bq27x00_battery. All these issues are fixed. Backported patches for N900 are here: http://talk.maemo.org/showpost.php?p=925980&postcount=674
		+
		+	As of now (2011-10-20) this kernel module still isn't fixed for good and introduced massive problems by either exclusively opening I2C bus so bme couldn't work anymore when started after this module got loaded, or the patch introduced with powerkernel-48 thoroughly messed up '''all I2C''' on the system, thus creating possible race conditions that may even destroy your hardware.

	There's a [[N900_Hardware_Charge_Meter/bq-script\|script]] and acompanying I2Ctools to read out the complete info from bq27200: http://enivax.net/jk/n900/bq.tar (thanks ShadowJK)		There's a [[N900_Hardware_Charge_Meter/bq-script\|script]] and acompanying I2Ctools to read out the complete info from bq27200: http://enivax.net/jk/n900/bq.tar (thanks ShadowJK)

	[[Category:N900 Hardware]]		[[Category:N900 Hardware]]

pali: /* Software */

2011-02-18T19:16:13Z

Software

← Older revision		Revision as of 19:16, 18 February 2011
Line 16:		Line 16:


-	There is no kernel driver in the default N900 software for this chip, a [http://tomoyo.sourceforge.jp/cgi-bin/lxr/source/drivers/power/bq27x00_battery.c partial third party driver exists].	+	There is no kernel driver in the default N900 software for this chip, a [http://tomoyo.sourceforge.jp/cgi-bin/lxr/source/drivers/power/bq27x00_battery.c partial third party driver bq27x00_battery exists].

-	This third party driver has some issues - for example - the 'current_now' value it exports is not mA, but needs multiplied by (3.57/n) - where n is the sense resistor in the N900.	+	This third party driver has some issues - for example - the 'current_now' value it exports is not mA, but needs multiplied by (3.57/n) - where n is the sense resistor in the N900. The sense resistor seems to be between 20 and 22 mR - but no accurate measurements have been performed, and the schematic does not help with this.

-	~~The sense resistor seems to be between 20 and 22 mR - but no accurate measurements have been performed, and the schematic does not help with this~~.	+	Now on kernel mailinglist is series of patches which improve (report more properties about battery then BME) kernel driver bq27x00_battery. All these issues are fixed. Backported patches for N900 are here: http://talk.maemo.org/showpost.php?p=925980&postcount=674

	There's a [[N900_Hardware_Charge_Meter/bq-script\|script]] and acompanying I2Ctools to read out the complete info from bq27200: http://enivax.net/jk/n900/bq.tar (thanks ShadowJK)		There's a [[N900_Hardware_Charge_Meter/bq-script\|script]] and acompanying I2Ctools to read out the complete info from bq27200: http://enivax.net/jk/n900/bq.tar (thanks ShadowJK)

	[[Category:N900 Hardware]]		[[Category:N900 Hardware]]

joerg_rw: /* Software */

2010-09-11T22:48:29Z

Software

← Older revision		Revision as of 22:48, 11 September 2010
Line 22:		Line 22:
	The sense resistor seems to be between 20 and 22 mR - but no accurate measurements have been performed, and the schematic does not help with this.		The sense resistor seems to be between 20 and 22 mR - but no accurate measurements have been performed, and the schematic does not help with this.

-	There's a script and acompanying I2Ctools to read out the complete info from bq27200: http://enivax.net/jk/n900/bq.tar (thanks ShadowJK)	+	There's a [[N900_Hardware_Charge_Meter/bq-script\|script]] and acompanying I2Ctools to read out the complete info from bq27200: http://enivax.net/jk/n900/bq.tar (thanks ShadowJK)

	[[Category:N900 Hardware]]		[[Category:N900 Hardware]]

joerg_rw: /* Software */

2010-09-11T22:40:17Z

Software

← Older revision		Revision as of 22:40, 11 September 2010
Line 21:		Line 21:

	The sense resistor seems to be between 20 and 22 mR - but no accurate measurements have been performed, and the schematic does not help with this.		The sense resistor seems to be between 20 and 22 mR - but no accurate measurements have been performed, and the schematic does not help with this.
		+
		+	There's a script and acompanying I2Ctools to read out the complete info from bq27200: http://enivax.net/jk/n900/bq.tar (thanks ShadowJK)

	[[Category:N900 Hardware]]		[[Category:N900 Hardware]]

speedevil: /* Software */

2010-06-10T13:19:21Z

Software

← Older revision		Revision as of 13:19, 10 June 2010
Line 15:		Line 15:
	It also can be used for energy profiling - see [[N900_Hardware_Power_Consumption\|this page on power use]].		It also can be used for energy profiling - see [[N900_Hardware_Power_Consumption\|this page on power use]].

-	~~It is unclear if this chip is used at all by software in the phone by default.~~

	There is no kernel driver in the default N900 software for this chip, a [http://tomoyo.sourceforge.jp/cgi-bin/lxr/source/drivers/power/bq27x00_battery.c partial third party driver exists].		There is no kernel driver in the default N900 software for this chip, a [http://tomoyo.sourceforge.jp/cgi-bin/lxr/source/drivers/power/bq27x00_battery.c partial third party driver exists].