Generation of 18k square wave

How to generate the 18kHz sqaure wave using 8051
Generation of 18k square wave

How to generate the 18kHz sqaure wave using 8051
to generate square wave of 10khz using timers

i want a code to generate 10khz square wave using timers in lpc2138.plz reply to this message.
to generate square wave of 10khz using timers

i want a code to generate 10khz square wave using timers in lpc2138.plz reply to this message.
Jitter in a square wave generated by using GPIO.

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...