2009:USB Mouse Driver

Driver State Design Notes

State Startup:
Look for interrupt
Get Interrupt, Start timer -> Startup2
No Interrupt -> Startup

State Startup2:
Wait timer...
Timer expires
If input = 1: Main1
If input = 0: Startup

State LongMain1:
Start timer
Go main2

LongMain2:
Wait on interrupt
Get interrupt, AND timer time == long period (ie, no movement): ShortMain1
Get interrupt, AND timer time < long period (movement): count++; Go LongMain3

LongMain3
Wait on interrupt
Get interrupt, timer != long period: Startup
Get interrupt, timer == long period: go to ShortMain1

ShortMain1:
Start timer
Go to shortmain2

ShortMain2:
Wait on interrupt
Get interrupt AND timer time == short period (ie, no movement): LongMain1
Get interrupt, AND timer time < short period (movement): count++; Go ShortMain3

ShortMain3
Wait on interrupt
Get interrupt, timer != short period: Startup
Get interrupt, timer == short period: go to LongMain1