I am quite new to CortexM3, so I am not sure what is the best approach to achieve microseconds delay. What I did on ARM7 and some 8-bit processors, is "waste time loops" in assembler which do some NOPs and tweak it with oscilloscope for certain osc freq. But with enabling PLL on CortexM3 I am wondering if I could achieve same with timers ? If I set PLL to get 120Mhz, will my timer work at that freq or at base freq of 20Mhz as osc ?
Thanks.
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