V850ES TOUCHIT NEC, V850ES TOUCHIT Datasheet - Page 37

• Manufacturer Part Number: V850ES TOUCHIT
• Description: STARTER KIT, 32BIT, TFT LCD
• Manufacturer: NEC

Specifications of V850ES TOUCHIT

• Kit Contents: V850ES/JG2 UPD70F3718 CPU, Epson S1D13A05 LCD/USB Companion Chip, USB Connector
• Svhc: No SVHC (18-Jun-2010)
• Development Tool Type: Demonstration Kit
• Kit Features: Complete Touch Controlled
• Silicon Manufacturer: NEC
• Kit Application Type: Audio Visual
• Application Sub Type: TFT LCD

9.6.1
This task is created in main( ). MainTask( ) forms the framework for the Touch It! Demos which are
described in the next section 9.7
When you wish to examine other examples in the Segger sample routines, these files also contains a
MainTask( ) function. As a result, you can substitute these functions into the demos for further
evaluation.
9.6.2
An empty user task is created in main( ) and set at a lower priority than MainTask( ) and is executed
every 10mS. This user task is provided for evaluation purposes.
9.6.3
The emWin graphics library supports various means of user inputs via keyboard, joysticks and pointing
devices. For the purpose of this demonstration kit, only the touch screen functions will be considered.
emWin provides full support for the touchscreen function from reading the touchscreen inputs,
calculating the position on the LCD screen to the routines and functions to position a cursor or
determine that a button or icon has been pressed or clicked.
As all other functions, the touchscreen also has to be initialised. The default values representing the
minimum and maximum ADC readings need to be defined in the GUITouchconf.h include file.
These values are used by the emWin library function GUI_Touch_Driveranalog (note: this source file
is not available in this demonstration kit. Please contact Segger Microsysteme for further details).
To initialise the touchscreen, the function main( ) calls the function TouchScreen_Init( ) in
ADC_Touchscreen.c.
Touchscreen_Init( ) creates _TouchTask( ) which is setup to be activated every 10mS. _TouchTask( )
enables the emWin GUI_Touch_Exec( ) to be called to service the touch screen functions.
The basic circuit for the touchpanel is shown below:-
MainTask
User task
Touch Screen task
CHAPTER 9
User's Manual U18781EE1V0UM00
STRUCTURE OF THE DEMO CODE
37