controllable delay function

Hi! Guys! I want to design a delay function
that can have any desire delay value input in.ex.delay(20)-- 20ms of delay ,
delay(1000)- 1s of delay.

I got problem when I wanted to convert the value of the integer to hexadecimal value.
In addition, the hexadecimal value intialize into TH0 and TL0.
Give me your advice.
Thank You!

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