Chapter 10.
Plugins
121
lost. Benchmarks can be resumed if you accidentally load a plugin, or turn off your
player, as long as the log file
/battery bench.txt
is not deleted.
Information explained
On the top of the file you will see various info on how to use the plugin.
Time
This column reports the total time of operation of the player. It is not the time
that you started the plug-in. If you have your player on for 5 minutes and then
start the plugin, it will start measuring from 5 minutes.
Seconds
As time, it shows time passed in seconds. Nothing special, it is there because
it is free and maybe someone might want to make graphs with seconds.
Level
The percent level of the battery estimated by Rockbox. This is an estimation
and not an accurate result. Using the real percentage (current battery voltage /
top battery voltage) * 100) we can calculate the difference between the estimation.
Goal of this column is to make the estimation algorithm of Rockbox more accurate.
Time Left
It shows the estimated (by Rockbox) remaining time until shutdown. Again,
as with Level(above), this column can be used to see differences between real time
left and estimated time left. This could help make time left more accurate.
Voltage
The battery voltage, the moment the measurement was captured. Measure-
ments are captured when this number changes while benchmarking. This column
can be used to give quite interesting graphs in a spreadsheet program. (Excel,
Calc, e.t.c)
M/DA
(Measurements per Disk Activity) The number of measurements stored tem-
porarily in memory, before written on the log file. This can give you an idea of
how many voltage changes there are between disk activity (or one hour).
C
Stands for Charger. An ”A” in that column shows if there was the power adapter
attached to the unit, at the time of the measurement.
S
The ”S” column shows the state of the device (Charging, or not). The ”C” indicated
that the unit was charging when the measurement was captured.
U
USB powered. Only for targets that support this. A ”U” will indicate if the unit was
using the USB port for powering.
Making graphs
While you can tell how long your battery lasted, with a single look at the last line of
the battery log (
/battery bench.txt
), the most useful purpose of Battery Benchmark
is to make graphs using a spreadsheet program like Excel or Calc. The battery log
(
/battery bench.txt
) is in CSV format (comma separated) so you can quite easily
import it to a spreadsheet program.
The Rockbox manual
Toshiba Gigabeat F Series
