libftdispi modified for higher throughput Based on https://storage.googleapis.com/google-code-archive-downloads/v2/code.google.com/libftdispi/libftdispi-0.2.3.tar.bz2 Modified to use: libftdi1 ftdi1 asynchronous read feature "SEND_IMMEDIATE" to avoid FTDI latency timer Observed shortcomings: SPI data send from target during write to target is not captured