Generåte 2 wåves of dífferent duty cycles on 2 dífferent port píns by usíng both tímers in 8051

I think its high time you start using interrupts. coz you cannot just add a loop like this. djnz behaves differently.. if you mistakenly decrement your register from 0 it will roll back to ff and loop will continue forever. You need extra code to run this in loop. Think and then write.