Altera DE2-115 - IR Receiver Demonstration

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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
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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.