Hi, I was recently looking into setting up a serial interface between a PC and the EVM board, in order to transfer data generated by a PC application to the DSP. However, the DSP56303 datasheet tells me that the minimum clock speed that the SCI interface can handle (in synchronous mode) is 53.3ns, which is still too slow for the intended application, since serial transfer would mean a delay of 8x53.3ns everytime a transfer was needed. The data that needs to be transmitted is simply a digital bit stream... that will need to be filtered, etc by the DSP once it is transferred. I was therefore thinking of setting up a very simple interface with 3 wires, between the PC COM port and the EVM board: - one wire to transmit the data - one wire for the EVM to ask for data - one wire for the PC to tell the EVM that data is ready Polling would take care of synchronizing the exchange. Has anybody ever implemented anything like this ? Is it possible (under a windows based machine) to access the COM port as a GPIO port ??? and read/write to certain pins ? If not, is there a way to configure the SCI of the DSP to transfer 1 bit at time instead of 8 ?? Thanks. Guillaume |