[Bug 1194] Touchscreen Jitter

bugzilla-daemon at bugzilla.openmoko.org bugzilla-daemon at bugzilla.openmoko.org
Sat Feb 2 01:07:20 CET 2008


http://bugzilla.openmoko.org/cgi-bin/bugzilla/show_bug.cgi?id=1194





------- Additional Comments From cwixon at usa.net  2008-02-02 01:07 -------
Actually, I forgot about ts_print and ts_print_raw, which are command-line
programs that just spit out time-stamped touchscreen coordinates.

The _raw version gives you the unprocessed 10-bit values before they are mapped
into screen coordinates.

Just for amusement's sake, here's a short segment of ts_print_raw output with my
stylus held as stationary as possible near the center of the screen:

1201910359.402200:    509    493      1
1201910359.447114:    507    493      1
1201910359.462275:    508    493      1
1201910359.477234:    510    494      1
1201910359.492121:    506    494      1
1201910359.507215:    508    494      1
1201910359.582220:    508    493      1
1201910359.597139:    509    494      1
1201910359.612217:    508    494      1
1201910359.657124:    507    493      1
1201910359.672120:    507    494      1
1201910359.687227:    508    493      1
1201910359.732117:    509    494      1
1201910359.747130:    509    493      1
1201910359.762235:    508    494      1
1201910359.777138:    508    493      1
1201910359.792180:    507    494      1
1201910359.807220:    507    493      1
1201910359.822221:    508    493      1
1201910359.837121:    508    494      1
1201910359.882126:    507    493      1
1201910359.897226:    509    494      1
1201910359.912226:    508    493      1
1201910359.927135:    510    493      1
1201910359.942229:    507    494      1
1201910359.957128:    508    494      1
1201910359.972235:    507    493      1
1201910359.987216:    507    494      1
1201910360.002224:    508    494      1
1201910360.017245:    507    495      1
1201910360.032191:    509    494      1
1201910360.047166:    506    493      1
1201910360.062231:    508    494      1
1201910360.077140:    509    493      1
1201910360.092198:    507    493      1
1201910360.107140:    506    493      1
1201910360.122227:    507    493      1
1201910360.137170:    508    494      1
1201910360.152229:    509    493      1
1201910360.182216:    508    493      1
1201910360.197135:    507    494      1
1201910360.212218:    507    493      1
1201910360.227218:    508    493      1
1201910360.272225:    509    493      1
1201910360.287131:    508    494      1
1201910360.302224:    510    493      1
1201910360.317185:    506    494      1
1201910360.332227:    507    493      1
1201910360.347122:    507    494      1
1201910360.362195:    508    494      1

I'm not sure (without looking at the code) whether dejitter has been applied at
this point or not.



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