7.23 SYS_TICKFREQ (0x31)

Returns the tick frequency.

Entry

Register R1 must contain 0 on entry to this routine.

Return

On exit, R0 contains either:

  • the number of ticks per second

  • –1 if the target does not know the value of one tick. Some debuggers might not support this SVC when connected though RVI or DSTREAM and they always return –1 in R0.

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