P0307 Terasic Technologies Inc, P0307 Datasheet - Page 22

• Manufacturer Part Number: P0307
• Description: KIT DEV 4.3" LCD TOUCH PANEL
• Manufacturer: Terasic Technologies Inc

Specifications of P0307

• Accessory Type: NTSC/PAL TV Player
• For Use With/related Products: DE2, DE1
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: TRDB_LTM

4-4 Block Diagram of the Ephoto Design
4.
When users touch the LTM screen, the 7-segment displays "HEX6~HEX4" and
"HEX2~HEX0" on the DE2 board will display the X and Y coordinates (in
Hexadecimal format) of the touch point respectively
indicates that the x and y coordinates of the corners on the LTM touch screen
This section will describe the block diagram of the Ephoto demonstration to
help users in reading the code provided.
the bit stream is downloaded into the FPGA, the register values of the LCD driver
IC using to control the LCD display function will be configured by the
LCD_SPI_Controller block, which uses the serial port interface to communicate
with the LCD driver IC. Meanwhile, the Flash_to_SDRAM_Controller block will
read the RGB data of one picture stored in the Flash, and then write the data into
SDRAM buffer. Accordingly, both the synchronous control signals and the picture
data stored in the SDRAM buffer will be sent to the LTM via the
LCD_Timing_Controller block.
be obtained by the ADC_SPI_Controller block through the ADC serial port
interface. Then the Touch_Point_Detector block will determine whether these
coordinates are in a specific range. If the coordinates fit the range, the
Touch_Point_Detector block will control the Flash_to_SDRAM_Controller block to
read the next or previous picture's data from the Flash and repeat the steps as
mentioned before to command the LTM to display the next or previous picture.
Figure 4.7 The x and y coordinates of the corners on the LTM touch screen
Figure 4.8 shows the block diagram of the EPhoto demonstration. As soon as
When users touch LTM screens, the x and y coordinates of the touch point will
20
Digital Panel Design Demonstration
(DE2 board
only). Figure 4.7