Patent ID: 6961875
Filing Date: 2005-11-01
Classification: G06F

Abstract:
1. A method for debugging a system comprising: 1) coupling first signals to a re-writeable trace array, said trace array having M storage locations, said M storage locations having corresponding M storage addresses from a starting address to an ending address; 2) generating a first event sequence signal in response to a first sequence of occurrences of a first event signal; 3) starting, in response to said first event sequence signal, a process of storing states of said first signals sequentially in said trace array at locations beginning at said starting address and proceeding sequentially to said ending address, said process of storing states of said first signals wrapping back to said starting address when said ending address is exceeded; 4) generating a second event sequence signal in response to a second sequence of occurrences of said first event signal; 5) stopping said process of storing states of said first signals in said trace array in response to said second event sequence signal; and 6) repeating steps 2) through 5) unless stopped by a second event signal.