@Fonsi wrote:
The idea is only wait to the first FFFF,FFFF,FFFF. And later get all the readings since will be save well, the rest of bytes sinc. i will delete with easy for loop...
I did some changes, and it runs but sometimes fail, since the sync sometimes is with value in the final byte, which is very strange, since pic send this value fixed, maybe is noise, the i.e FFFF,FFFF,FF56.
Other thing is i need the data directly to draw in the any graph, i must to read 6bytes and draw it, and this vi read values until you close the loop...
You should maintain the synchro loop after reading a series of data bytes, alternating synchro on 6 bytes and acquisition of the 240x3x2 bytes : if any byte was lost, for one reason or the other, then, without resynchronizing, you would loose definitively all the incoming data. The series of FFFF FFFF FF56 is exactly that : one byte was missed, and the last 56 value probably belong to the following set of data !..
There is probably a better way of re-synchronisation : looking for the last FFFF of a longer series of FFFF's. As it stand in my last proposal, when a byte is lost, all the following data are garbage, then you will not be able to synchronize on the first series of FF's since the first one will be already imbedded in the data field, and you will have to wait until all the data byte chunk has been passed again.
Provisionnaly, I suggest you only read 239 values.
Plotting to a graph should not be a problem : do the data acquisition in a for loop, as I did for the synchro, reading only 6 bytes in a row, 240 times, and send the values (a single M1, M2, M3) to 3 waveform charts, without further processing. That should do the job...
CC
Chilly Charly (aka CC)
