I've committed some more code to the svn repo at svn://svn.geekisp.com/opensdr/beagle-sdr :
spi-utils contains some modified versions of spidev_test. dump_data reads bytes from stdin and sends them over the SPI port while simultaneously reading bytes over SPI and writing them to stdout. peek_poke lets you read or write control registers on the AD9860/9862 ADC if you connect it to a SPI port. I'm not convinced that I have the byte order absolutely (or portably) right in these, so use them at your own risk. gr-spi contains two blocks for GNU Radio: gr_spi.spi_source_s and gr_spi.spi_srcsink_ss. They both provide a method called open_spi(const std::string &device, int speed) to open a specified device file for SPI transfers at a maximum rate of speed Hz, and close_spi() to close the device. Their output is 16-bit shorts read over SPI. spi_srcsink_ss also has an input port to let you send a stream of data over SPI, while spi_source_s provides a method called send_spi_command(const std::string &command) to let you feed it bytes without having to connect it to a signal source. gr-spi/misc contains simple flow graphs in Python using spi_source_s and spi_srcsink_ss, and a .bb file for cross-compiling gr-spi under OpenEmbedded. Put gr-spi_0.1.bb in a directory under $OE_HOME/openembedded/recipes along with the tarball created by `make dist-bzip2`, then bitbake gr-spi. eastwood contains code for the FPGA on the (still-unnamed) board we're building. Compile it with eastwood.vhd as the top-level entity, and it will send samples from the ADC straight through to the DAC, while exposing the AD9862's control port to McSPI3 on the BeagleBoard. blondie.vhd connects McSPI4 to the ADC/DAC through a simple signal-processing path (just a trivial interpolator and decimator for now); McSPI3 goes to the AD9862 and a set of control registers on the FPGA. None of this is production-quality, but hopefully it's a few steps closer to being useful. George
