Altera DE2-115 User Manual page 96

Figure 6-16 Waveforms on two lines while communication taking place
 Demonstration Setup, File Locations, and Instructions
 Project directory: DE2_115_PS2_DEMO
 Bit stream used : DE2_115_PS2_DEMO.sof
 Load the bit stream into FPGA by executing
DE2_115_PS2_DEMO\demo_batch\DE2_115_PS2_DEMO.bat
 Plug in the PS/2 mouse
 Press KEY[0] for enabling data transfer
 Press KEY[1] to clear the display data cache
You should see digital changes on 7-segment display when the PS/2 mouse moves, and the
LEDG[2:0] will blink respectively when the left-button, right-button or middle-button is pressed.
Table 6-2 gives the detailed information.
Indicator Name
LEDG[0]
LEDG[1]
LEDG[2]
Table 6-2 Detailed information of the indicators
Description
Left button press indicator
Right button press indicator
Middle button press indicator
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