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Using ChipScope with OPB IIC
XAPP979 (v1.0) February 26, 2007 www.xilinx.com 20
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The waveform viewer is more readable when buses rather than discrete signals are displayed.
The Reverse Bus Order operation below Add to Bus in the figure can be useful in analyzing
ChipScope results.
11. Set the trigger in the Trigger Setup window. The trigger used depends on the problem being
debugged. Change the Windows to N samples to a setting of 100. Arm the trigger by selecting
Trigger Setup → Arm, or clicking on the Arm icon.
As shown in Figure 24, the trigger setup is to trigger when gen_start is High.
12. Run XMD and/or GDB to activate the trigger patterns which cause ChipScope to display
meaningful output.
Figure 24: Setting Up the Chipscope Trigger
X979_24_022307