clock | Counter clock |
The following values are specified for clock.
Value | Meaning | Time equivalent to 1 count | Upper limit of time that can be counted |
SYD_TMR_CLOCK_P4 | Phi/4 | 0.08 microseconds | Approximately 21 minutes |
SYD_TMR_CLOCK_P16 | Phi/16 | 0.32 microseconds | Approximately 22 hours and 52 minutes |
SYD_TMR_CLOCK_P64 | Phi/64 | 1.28 microseconds | Approximately 91 hours and 38 minutes |
SYD_TMR_CLOCK_P1024 | Phi/1024 | 20.48 microseconds | Approximately 17 years |
Because the counter value is 32 bits, the time needed in order to get a unique value depends on the counter clock that is set. The default is "divided by 64", so that 100000000h x 1.28 micro=5497.558 seconds(=approximately 91 hours and 38 mintues).