implemet a timer

[^NyAw^]

Hi,

Not a good aproach to use an infinite loop and breaking it on this way.

Use 2 QTimers:
-First one that will fire ever X ms(depending on Baud Rate you have to calculate this) and will take a look if there is data avaiable.
When the first timer fires, take a look if there is data to read, if there isn't, you have to check if the secon timer is started, if not started, start it.

The second one will fire if you have not readed any data in 10 seconds. This will be a singleShot timer. When it fires, stop the first timer.

[talk2amulya]

wont an infinite loop be necessary in this case...where we have to do something until a condition satisfies..which means we dont know until this condition will come true..i dont know why everyone is so against using 'break' in a loop..its just an equivalent of JMP in assembly which is probably the most common instruction in assembly

[^NyAw^]

Yes,

You do work until some case is done.
But having data on serial port is slower than every iteration of the bucle, so you will waste too much time by doing nothing.
Using a timer with a time calculated to satisfy the Baud Rate will be a more elegant way.

[talk2amulya]

makes sense..thanks for clearin that up..i didnt know abt the baud rate and stuff

[adamatic]

I have finally decided use the idea of use 2 timers, checking every second the input port and stop both timers when it receives datas, and if there arent datas after 10 seconds go to another slot and stop them.

Thank you very much to all the answers.