int irRead(int readPin,int triggerPin);

i want to generate 38.5 khz for ir led . where can i get detail information regarding int irRead(int readPin,int triggerPin); i used tsop 1838

You have the source code that goes with the header file that you copied that line out of. There is no more definitive explanation of what the function does than the code itself.

i want to generate 38.5 khz for ir led

It's been at least two days since this question was last asked on the forum. It's about time it came up again.