Wrong data when reading from serial port

[erytcg]

ok I use qSort similar The sort algorithm is efficient on large data sets. It operates in linear-logarithmic time, O(n log n).

But I have one more question when I fast read serial port I get

"042GGHHIIJJ\r86D8102730DF38AEDDFD1"

it's correct data buffer:

"86D8102730DF38AEDDFD1042GGHHIIJJ\r"

I use this function

data = serialPort->read(33); //read buffer

[Edit: forked as this is a whole new topic ~~ @Wieland]

[SGaist]

Hi,

From the looks of it, you are receiving the same frame several times one after the other. You are reading the serial port as if it was a file but it's not. You'll be getting data when they arrive, your application might not receive a frame when it starts listening to the serial port so it's up to you to devise a way to know when you did in fact get a full frame e.g. size of data and \r being the last character.

[erytcg]

I know but how I'm supposed to know when data frame is ready?

[SGaist]

You know the device and the protocol. From what you wrote it looks like you need to have retrieved a frame once you have at least 33 chars which last one is \r.