uart 1,2,3 order number receive problem.

[lignin]

I am trying to receive 1,2,3 order number from uart with single receive interrupt. But I dont know how can ı do. I mean user can send me 1,2,3 order number like 1,10,100, and ı must receive that number in receive interrupt. How can ı recognize that user send me 1 or 2 or 3 order number ? So how can ı write this code ?
sorry about my english. I hope I told my problem properly.

 

[FvM]

This is a message framing problem. Ideally the start and end of a message (one number) should be unequivocally detectable. In this simple case, you need a kind of separator between numbers. You're apparently assuming ASCII coded digits, so any non-numerical character can serve as a separator, e.g. space, carriage return, comma.

 

[lignin]

thank you FvM. I know this method. I tried to find another way. But I understand that, there is no way. thank you again.