Chadderz121/bakingpi-www

OK04 Questions

Opened this issue · 0 comments

Very new to asm coding.
Puzzled why systemTimer.s Wait loop$ uses:
sub elapsed,r0,start
to delay?

Q1. Isn't GetTimeStamp 64bit, but SUB 32-bit?
Q2. Why is it ok to ignore r1 counter values and only subtract on r0?