First of all, I don't believe that the PC part of the system will work at this moment. The source says it still has to be written (
* created on : 12/12/2003 ), so sit and wait until christmas and see what happens.

Seriousely .. You will have a timing problem here. There is no timing in your program, nor is there any handshake between PC and controller system. You can't rely on a constant data throughput on your PC, and you can never expect fluently timed transfer of data between host and slave. So the first thing I would expect in the software is some means of go/no go transfer mechanism.

Secondly, you set a baudrate of 64.000 bps. IS that actually possible? (I never checked it, so maybe it is ...). But in case it would, how do you keep up the 8.000 bytes per second sample rate? With 1 start and 1 stopbit, your max. speed on the serial port is 6.400 bytes per second. And that's MAXIMUM, so you won't even reach that.