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Hi all, I tried to used the C6711 DSK's McBSP port 1 to write data through the DX1 pin on the extension bus and observed data signal from the Tektroniz digital oscilloscope, but how come there was no any changes occured from DX1 pin??? The McBSP was generated from the internal clock source and I used the CPU polling to wake up the transmitter. No receiver setup is required, since i only want to configure the registers on my daugutercard. I was followed TI's McBSP initialisation PDF (SPRA488B) steps and configured the McBSP corresponded registers , but still can't get it worked! Could anyone perhaps offered me a McBSP sample code i.e. used the DSP BIOS configuration GUI to me ASAP, thanks a lot?? Stanley

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