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diff --git a/host/docs/usrp2.rst b/host/docs/usrp2.rst new file mode 100644 index 000000000..092332442 --- /dev/null +++ b/host/docs/usrp2.rst @@ -0,0 +1,128 @@ +======================================================================== +UHD - USRP2 Application Notes +======================================================================== + +.. contents:: Table of Contents + +------------------------------------------------------------------------ +Building firmware and FPGA images +------------------------------------------------------------------------ + +^^^^^^^^^^^^^^^^^^ +FPGA Image +^^^^^^^^^^^^^^^^^^ +Xilinx ISE 10.1 is required to build the FPGA image for the USRP2 +(newer version of ISE are known to build buggy images). +The build requires that you have a unix-like environment with make. +Make sure that xtclsh from the Xilinx ISE bin directory is in your $PATH. + +Run the following commands: +:: + + cd <uhd-repo-path>/fpga/usrp2/top/u2_rev3 + make bin + +*The image file will be ./build/u2_rev3.bin* + +^^^^^^^^^^^^^^^^^^ +Firmware Image +^^^^^^^^^^^^^^^^^^ +The Microblaze GCC compiler from the Xilinx EDK is required to build the firmware. +The build requires that you have a unix-like environment with autotools and make. +Make sure that mb-gcc from the Xilinx EDK/microblaze directory is in your $PATH. + +Run the following commands: +:: + + cd <uhd-repo-path>/firmware/microblaze + ./boostrap + ./configure --host=mb + make + +*The image file will be ./apps/txrx_uhd.bin* + +------------------------------------------------------------------------ +Load the images onto the SD card +------------------------------------------------------------------------ +**Warning!** +Use the u2_flash_tool with caution. If you specify the wrong device node, +you could overwrite your hard drive. Make sure that --dev= specifies the SD card. + +Load the FPGA image: + +:: + + cd <uhd-repo-path>/firmware/microblaze + sudo ./u2_flash_tool --dev=/dev/sd<XXX> -t fpga -w <path_to_fpga_image> + +Load the firmware image: + +:: + + cd <uhd-repo-path>/firmware/microblaze directory + sudo ./u2_flash_tool --dev=/dev/sd<XXX> -t s/w -w <path_to_firmware_image> + +------------------------------------------------------------------------ +Setup networking +------------------------------------------------------------------------ +The USRP2 only supports gigabit ethernet, and +will not work with a 10/100 Mbps interface. +Because the USRP2 uses gigabit ethernet pause frames for flow control, +you cannot use multiple USRP2s with a switch or a hub. +It is recommended that each USRP2 be plugged directly into its own +dedicated gigabit ethernet interface on the host computer. + +^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ +Setup the host interface +^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ +The USRP2 communicates at the IP/UDP layer over the gigabit ethernet. +The default IP address of the USRP2 is **192.168.10.2** +You will need to configure the host's ethernet interface with a static IP address to enable communication. +An address of **192.168.10.1** is recommended. + +**Note:** +When using the UHD, if an IP address for the USRP2 is not specified, +the software will use UDP broadcast packets to locate the USRP2. +On some systems, the firewall will block UDP broadcast packets. +It is recommended that you change or disable your firewall settings. + +^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ +Change the USRP2's IP address +^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ +You may need to change the USRP2's IP address for several reasons: + +* to satisfy your particular network configuration +* to use multiple USRP2s on the same host computer +* to set a known IP address into USRP2 (in case you forgot) + +**Method 1:** +To change the USRP2's IP address +you must know the current address of the USRP2, +and the network must be setup properly as described above. +Run the following commands: +:: + + cd <prefix>/share/uhd/utils + ./usrp_burner --addr=192.168.10.2 --new-ip=192.168.10.3 + +**Method 2 (Linux Only):** +This method assumes that you do not know the IP address of your USRP2. +It uses raw ethernet packets to bypass the IP/UDP layer to communicate with the USRP2. +Run the following commands: +:: + + cd <prefix>/share/uhd/utils + ./usrp2_recovery.py --ifc=eth0 --new-ip=192.168.10.3 + +^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ +Debugging networking problems +^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ +**Monitor the USRP2:** +You can read the serial port on the rear of the USRP2 +to get debug verbose from the embedded microcontroller. +Use a standard USB to tty-level serial converter at 230400 baud. +The microcontroller prints useful information about IP addresses, +MAC addresses, control packets, and fast-path settings. + +**Monitor the host network traffic:** +Use wireshark to monitor packets sent to and received from the USRP2. |