[Bug 1182] New: Charging current measurement is incorrect (fix)
bugzilla-daemon at bugzilla.openmoko.org
bugzilla-daemon at bugzilla.openmoko.org
Tue Jan 15 20:03:20 CET 2008
http://bugzilla.openmoko.org/cgi-bin/bugzilla/show_bug.cgi?id=1182
Summary: Charging current measurement is incorrect (fix)
Product: OpenMoko
Version: 2007.2
Platform: PC
OS/Version: FreeBSD
Status: NEW
Severity: normal
Priority: P2
Component: kernel
AssignedTo: willie_chen at openmoko.com
ReportedBy: andrew.paulsen at packetdigital.com
CC: buglog at lists.openmoko.org
There are multiple problems with the charging current measurement that I have
fixed in this patch.
- Least significant bits of ADCIN1 were not shifted correctly
- A 6V reference voltage was assumed, but a 2.4V reference is actually used
- Math could result in negative values, but unsigned types were used
- Explicit type casting was added to the calculation to correct a possible overflow
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