Could anybody please show me if ARM could generate a square wave without jitter by using GPIO?
If it could, how?If it could not, why? Cache or interruption makes it?Please show me.
My code is as below.
tag: gpio_on(4); asm("nop"); gpio_off(4); goto tag;
And, this code generates a square wave of 1.5MHz. Why so slow?
Read the specs of your SoC, it will explain.
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