Vittorio, You are right, in a different thread I suggested RS-232, not possible. Forgot bits per second vs. bytes per second difference. 232 is useless. David
--- In [email protected], "vittorio59psi" <[EMAIL PROTECTED]> wrote: > > uhmmmmm.....! > Passing audio samples via RS232 is a *BIG* timing problem. > I'm working on something similar using a PIC, and for a I/Q sampling > (5 Khz sampling rate, 2 channels @ 10 bit per sample) it's mandatory a > 230.4 kbps over the serial, otherwise it's impossible to send data > before a new sample is available. > This, en passant, is the highest *safe* speed over a bulk serial > installed into our PC; at this speed we have to send 4 byte (plus > start/stop bits): > 1 byte as SYNC (otherwise we can go to swap/mix I/Q data) > 2 bytes for lower bit data > 1 byte for the most significant bit of data assembled together in one > byte. > At 48 khz sampling we need more than 2 Mbps over the serial. > Pay attention that RS232 line driver as MAX232 reaches there the > limit, so it's necessary other hardware. > Making the same via USB would be the right way, but ... isn't so > simple as RS232. > ... so working in progress! > > de i3vfj, Vittorio >
