That commit broke bsp/stm3210x. The cause is that we calls rtgui_system_init in rtgui_startup. But the calibration starts before rtgui_startup and rtgui_system_init. This lead to crash.
One way to deal with it is move rtgui_system_init out of rtgui_startup and call it manually. But it will affect other bsps. So just revert the "bad" commit.
git-svn-id: https://rt-thread.googlecode.com/svn/trunk@1793 bbd45198-f89e-11dd-88c7-29a3b14d5316
If we do not calibrate the touch screen, GUI is unusable. This patch use a semaphore to block GUI thread until calibration finish.
git-svn-id: https://rt-thread.googlecode.com/svn/trunk@1791 bbd45198-f89e-11dd-88c7-29a3b14d5316
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