Enable and disable the touch screen

 

* ****************************** Loongembedded ******* *************************

Author: loongembedded (Kandi)

Time: 2011.11.18

Category: Wince-driven development

* ****************************** Loongembedded ******* *************************

 

Remarks: Systems Based on wince6.0 + cloud6410

 

According to the project's needs, in order to save power consumption, when the product does not need to watch the LCD screen display, We need to disable the LCD screen display and at the same time disable the touch screen response; restore the display of the LCD screen when necessary. At the same time, you must reply to the touch screen's normal response to the touch screen. How to implement it?

 

First, let's take a look at the interrupt description of the vector Interrupt Controller part of the courseware 6410 when the pen is pressed and lifted.

Figure 1

It can be seen that the physical interrupt number of the touch pen press and lift is 62, which corresponds to the VIC [30] of the vic1 group. next, let's look at the description of the interrupt enable register vicintenable and interrupt enable clear register vicintenclear in the vector interrupt controller section.

Figure 2

The touch function of the touch screen can be disabled by disabling the int_pendnup interrupt through the [30] position of the vic1intenclear register, the int_pendnup interrupt can be made through the [30] Location of the vic1intenable register to enable the normal touch response of the touch screen. The Code is as follows:

Disable:

G_pvic1reg-> vicintenclear = (0x1 <30 );

Enable:

G_pvic1reg-> vicintenable = (0x1 <30 );

In this way, you can enable the touch screen function.