This also provide an example to show how to use calibration feature in
the RTGUI.

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@2410 bbd45198-f89e-11dd-88c7-29a3b14d5316

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@2297 bbd45198-f89e-11dd-88c7-29a3b14d5316

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@2177 bbd45198-f89e-11dd-88c7-29a3b14d5316

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@2170 bbd45198-f89e-11dd-88c7-29a3b14d5316

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@2055 bbd45198-f89e-11dd-88c7-29a3b14d5316

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@2053 bbd45198-f89e-11dd-88c7-29a3b14d5316

in order to use buildbot.py

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@2028 bbd45198-f89e-11dd-88c7-29a3b14d5316

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@1906 bbd45198-f89e-11dd-88c7-29a3b14d5316

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@1892 bbd45198-f89e-11dd-88c7-29a3b14d5316

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@1858 bbd45198-f89e-11dd-88c7-29a3b14d5316

DMA_Init asserts DMA_BufferSize >=1.

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@1822 bbd45198-f89e-11dd-88c7-29a3b14d5316

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@1821 bbd45198-f89e-11dd-88c7-29a3b14d5316

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@1811 bbd45198-f89e-11dd-88c7-29a3b14d5316

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@1808 bbd45198-f89e-11dd-88c7-29a3b14d5316

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@1794 bbd45198-f89e-11dd-88c7-29a3b14d5316

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

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@1790 bbd45198-f89e-11dd-88c7-29a3b14d5316

Check whether finger is still on the screen. If not, we couldn't determine where the user has touched. It's better to return early rather than give garbage values.

A more sensitive solution might be caculate the position once the interrupt occured. But it's not anti-shake friendly.

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@1789 bbd45198-f89e-11dd-88c7-29a3b14d5316

Rename flag to touched_down.

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@1788 bbd45198-f89e-11dd-88c7-29a3b14d5316

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@1783 bbd45198-f89e-11dd-88c7-29a3b14d5316