Method for Testing the resistive touch screen under WinCE

A long time ago, in the article "optimization of four-wire resistive touch screen drive", the transformation method of the tcc89 platform touch drive was introduced. Practice has proved that after using this method, the touch screen almost never jumps, achieving the expected goal. Recently, yjun found a problem when debugging the application and suspected that it had something to do with the touch screen driver-the number of points that the touch driver reported to the operating system within one second is too small, resulting in poor interface display during sliding. A simple tool, tscapp.exe, is written for the volume test, as shown in.

37/s in the figure indicates the sensitivity parameter input by hand. When you press the touch screen and quickly slide, observe the size of this parameter. The larger the value, the higher the sensitivity of the handwritten input. The smaller the value, the lower the sensitivity of the handwritten input, that is to say, when using the handwriting input method, handwriting may not be smooth enough. 37/s is slightly lower. According to Lao Deng, it is best to support handwriting input to about 60, or at least 50. I tested it on M8, and it can reach 86/s, as shown in.

It seems that there is still a need for further optimization of the touch driver, and it is necessary to increase the handwriting sensitivity parameters.

For touch screen drivers, in addition to handwriting sensitivity parameters, a very important issue is the jump pen. The method for testing the jump pen is also very simple. Tap the touch screen and check whether the red dot emits and whether it deviates from the pressed position. The more severe the divergence or the farther the deviation from the position of the press, the more serious the jump pen is.

The CPU usage of the touch driver is also a factor to consider. Is the Performance Monitor used to test handwritten sensitivity parameters on the tcc89 platform.

As you can see, the CPU usage has been relatively stable and there is not much ups and downs.

Touch screen testing gadgets: http://files.cnblogs.com/we-hjb/TSCApp.rar