Altera DE2-115 Bedienungsanleitung PDF herunterladen (Seite 99)

LEDG[2] Middle button press indicator

HEX0 Low byte of X displacement

HEX1 High byte of X displacement

HEX2 Low byte of Y displacement

HEX3 High byte of Y displacement

Figure 6-17 illustrates the setup of this demonstration.

Figure 6-17 The setup of the PS/2 Mouse demonstration

In this demonstration, the key-related information that the user has pressed on the remote

controller(Figure 6-18，

，，

，Table 6-3) will be displayed on the DE2-115 board. Users only need to

point the remote controller to the IR receiver on DE2-115 board and press the key. After the signal

being decoded and processed through FPGA, the related information will be displayed on the

7-segment displays in hexadecimal format, which contains Custom Code, Key Code and Inversed

Key Code. The Custom Code and Key Code are used to identify a remote controller and key on the

remote controller, respectively.

Next we will introduce how this information being decoded and then displayed in this demo.

When a key on the remote controller is pressed, the remote controller will emit a standard frame,

shown in Figure 6-19. The beginning of the frame is the lead code represents the start bit, and then

is the key-related information, and the last 1 bit end code represents the end of the frame.

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Altera DE2-115 Bedienungsanleitung Seite 99