(Again, these may show up on a quiz !!!)
Wait a second! These look like questions from a previous homework! Yes indeed!!!!
1) If (Count1==0)
Then call is_zero
Else call is_not_zero
2) If (Count1>=Count2)
Then call Count1_bigger
Else call Count2_bigger
3) Polling a pin
Suppose pin B0 is set to be an input
pin. It is normally set to zero, but occassionally will go high
to 1. When it goes high to 1, we wish to call
a subroutine called went_high.
while( pin B0==0);
<---- this is called "polling a pin" . while it is zero, keep
checking, when it turns to 1, exit loop
4) We stated in class that all instructions that don't alter the PC
take 1 microsecond to execute, and instructions that do alter the PC
take 2 microseconds. Why is this true ?
5) How many bits is the opcode in a 16F628 instruction ? A visit to the
reference manual!! Look at the instruction set reference link
off the class web page.
6) What is a Watch Dog Timer (WDT) ? What breed of dog is the Watch Dog Timer ?