Understanding the system timer - Raspberry Pi Forums

i've been trying decipher documentation on system timer, , seems rather sparse. can't figure out enable system timer interrupt; there aren't bits marked being related system timer interrupts in irq enable registers or in system timer registers. i'm assuming system timer interrupt enabled (as long irqs enabled) , need set bits in system timer control register acknowledge timer. correct, or missing something?

i pretty sure match flags interrupts not enabled time. assume tied interrupt controller without being enabled there enabling arm interrupts wont see them. easy poll interrupt controller find bits changing state, find ones match counter match flag. there enable it/them arm , arm can handle interrupt.

curious, maybe own example of this. curious see if gpu using timer, if based on docs monitor match registers if changing gpu doing it. , using them.

david

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