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SoftwareDefined/HackRF/hackrf-2015.07.2/firmware/cpld/sgpio_if/README.md

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+CPLD interface between LPC43xx microcontroller SGPIO peripheral and MAX5864
+RF codec.
+
+Requirements
+============
+
+To build this VHDL project and produce an SVF file for flashing the CPLD:
+
+* Xilinx WebPACK 13.4 for Windows or Linux.
+
+To program the SVF file into the CPLD:
+
+* Dangerous Prototypes Bus Blaster v2:
+  * Configured with [JTAGKey buffers](http://dangerousprototypes.com/docs/Bus_Blaster_v2_buffer_logic).
+  * Connected to CPLD JTAG signals on Jellybean.
+
+* urJTAG built with libftdi support.
+
+* BSDL model files for Xilinx CoolRunner-II XC264A, available at xilinx.com,
+  in the "Device Models" Support Resources section of the CoolRunner-II
+  Product Support & Documentation page. Only one file from the BSDL package is
+  required, and the "program" script below expects it to be at the relative
+  path "bsdl/xc2c/xc2c64.bsd".
+
+Generate an XSVF
+================
+
+After generating a programming file:
+
+* In the ISE Project Navigator, "Processes: top - Behavioral" pane, double-click "Configure Target Device".
+* Click "OK" to open iMPACT.
+* Ctrl-N to create a "New Project".
+* "Yes" to automatically create and save a project file.
+* Select "Prepare a Boundary-Scan File", choose "XSVF".
+* Select file name "default.xsvf".
+* Click "OK" to start adding devices.
+* Assign new configuration file: "top.jed".
+* Right-click the "xc2c64a top.jed" icon and select "Erase". Accept defaults.
+* Right-click the "xc2c64a top.jed" icon and select "Program".
+* Right-click the "xc2c64a top.jed" icon and select "Verify".
+* Choose menu "Output" -> "XSVF File" -> "Stop Writing to XSVF File".
+* Close iMPACT.
+
+To Program
+==========
+
+./program
+
+...which connects to the Bus Blaster interface 0, sets the BSDL directory,
+detects devices on the JTAG chain, and writes the sgpio_if.svf file to the
+CPLD.