Tectu/ChibiOS-GFX — pull request #13 by abhishek-kakkar (2012-11-08 19:22:19+00:00)
Title: Touchscreen 3 point calibration support

All is tested and working, as wanted
Unfortunately the entire touchpad.c got changed in the commit (tabs/line endings problem), it shouldn't have. You might have to do a cleanup later.