2.USRP的配置

运行环境

环境	详情
系统	Ubuntu14.04
gnuradio	GNU Radio Companion 3.7.5
uhd	UHD_003.010.002.000-3-g122bfae1
USRP product	B210
USRP ip	192.168.10.1
PC ip	192.168.10.5
Boost	105400
GNU C++	4.8.4
Python	Python 2.7.6

本步骤是基于GNUradio以及相关驱动uhd已经搭建好的基础上，进行USRP板子与PC机的连通。当环境搭建完毕之后，运行:

sudo uhd_find_devices

会出现这样的错误：

*rootradio@ubuntu:~$ uhd_find_devices
linux; GNU C++ version 4.8.4; Boost_105400; UHD_003.010.002.000-3-g122bfae1
UHD Error:
USB open failed: insufficient permissions.
See the application notes for your device.
No UHD Devices Found*

是由于板子和电脑还没有进行连通，所以首先我们要先修改PC机的地址，使之和USRP处于同一网段内。配置的时候只需要配套的一根USB线即可。

1.配置PC机网络

由于USRP的地址在出厂时已定，我是用的板子地址为 192.168.10.1

（1）在linux虚拟机中点击右上角 Edit connection

（2）选中相应网卡，点击 Edit

（3）选择 IPv4 Settings ，在method处选择 manual 手动配置IP

（4）将IP地址填为 192.168.10.0~255 ，子网掩码 255.255.255.0

2.测试连接

更改完地址之后，测试是否可以连通USRP板，接收到数据表示已连通

$ ping 192.168.10.1

3.测试USRP驱动

连通之后还需要USRP的驱动UHD是不是匹配的，如果不匹配的话需要按照教程把和PC配对的固件烧录到USRP中。
运行：

sudo uhd_usrp_probe

会出现以下界面：

*linux; GNU C++ version 4.8.4; Boost_105400; UHD_003.010.002.000-3-g122bfae1
– Loading firmware image: /usr/local/share/uhd/images/usrp_b200_fw.hex…
Error: LookupError: KeyError: No devices found for —–>
Empty Device Address*

然后在运行查找设备的命令我们就可以看到该USRP的型号等信息了

rootradio@ubuntu:~$ sudo uhd_find_devices
linux; GNU C++ version 4.8.4; Boost_105400; UHD_003.010.002.000-3-g122bfae1

--------------------------------------------------
-- UHD Device 0
--------------------------------------------------
Device Address:
    type: b200
    name: 2000501894056
    serial: 30AA038
    product: B210

rootradio@ubuntu:~$ sudo uhd_usrp_probe 
linux; GNU C++ version 4.8.4; Boost_105400; UHD_003.010.002.000-3-g122bfae1

-- Detected Device: B210
-- Loading FPGA image: /usr/local/share/uhd/images/usrp_b210_fpga.bin... done
-- Operating over USB 2.
-- Detecting internal GPSDO.... No GPSDO found
-- Initialize CODEC control...
-- Initialize Radio control...
-- Performing register loopback test... pass
-- Performing register loopback test... pass
-- Performing CODEC loopback test... pass
-- Performing CODEC loopback test... pass
-- Setting master clock rate selection to 'automatic'.
-- Asking for clock rate 16.000000 MHz... 
-- Actually got clock rate 16.000000 MHz.
-- Performing timer loopback test... pass
-- Performing timer loopback test... pass
  _____________________________________________________
 /
|       Device: B-Series Device
|     _____________________________________________________
|    /
|   |       Mboard: B210
|   |   revision: 4
|   |   product: 2
|   |   serial: 30AA038
|   |   name: 2000501894056
|   |   FW Version: 8.0
|   |   FPGA Version: 14.0
|   |   
|   |   Time sources:  none, internal, external, gpsdo
|   |   Clock sources: internal, external, gpsdo
|   |   Sensors: ref_locked
|   |     _____________________________________________________
|   |    /
|   |   |       RX DSP: 0
|   |   |   
|   |   |   Freq range: -8.000 to 8.000 MHz
|   |     _____________________________________________________
|   |    /
|   |   |       RX DSP: 1
|   |   |   
|   |   |   Freq range: -8.000 to 8.000 MHz
|   |     _____________________________________________________
|   |    /
|   |   |       RX Dboard: A
|   |   |     _____________________________________________________
|   |   |    /
|   |   |   |       RX Frontend: A
|   |   |   |   Name: FE-RX2
|   |   |   |   Antennas: TX/RX, RX2
|   |   |   |   Sensors: temp, rssi, lo_locked
|   |   |   |   Freq range: 50.000 to 6000.000 MHz
|   |   |   |   Gain range PGA: 0.0 to 76.0 step 1.0 dB
|   |   |   |   Bandwidth range: 200000.0 to 56000000.0 step 0.0 Hz
|   |   |   |   Connection Type: IQ
|   |   |   |   Uses LO offset: No
|   |   |     _____________________________________________________
|   |   |    /
|   |   |   |       RX Frontend: B
|   |   |   |   Name: FE-RX1
|   |   |   |   Antennas: TX/RX, RX2
|   |   |   |   Sensors: temp, rssi, lo_locked
|   |   |   |   Freq range: 50.000 to 6000.000 MHz
|   |   |   |   Gain range PGA: 0.0 to 76.0 step 1.0 dB
|   |   |   |   Bandwidth range: 200000.0 to 56000000.0 step 0.0 Hz
|   |   |   |   Connection Type: IQ
|   |   |   |   Uses LO offset: No
|   |   |     _____________________________________________________
|   |   |    /
|   |   |   |       RX Codec: A
|   |   |   |   Name: B210 RX dual ADC
|   |   |   |   Gain Elements: None
|   |     _____________________________________________________
|   |    /
|   |   |       TX DSP: 0
|   |   |   
|   |   |   Freq range: -8.000 to 8.000 MHz
|   |     _____________________________________________________
|   |    /
|   |   |       TX DSP: 1
|   |   |   
|   |   |   Freq range: -8.000 to 8.000 MHz
|   |     _____________________________________________________
|   |    /
|   |   |       TX Dboard: A
|   |   |     _____________________________________________________
|   |   |    /
|   |   |   |       TX Frontend: A
|   |   |   |   Name: FE-TX2
|   |   |   |   Antennas: TX/RX
|   |   |   |   Sensors: temp, lo_locked
|   |   |   |   Freq range: 50.000 to 6000.000 MHz
|   |   |   |   Gain range PGA: 0.0 to 89.8 step 0.2 dB
|   |   |   |   Bandwidth range: 200000.0 to 56000000.0 step 0.0 Hz
|   |   |   |   Connection Type: IQ
|   |   |   |   Uses LO offset: No
|   |   |     _____________________________________________________
|   |   |    /
|   |   |   |       TX Frontend: B
|   |   |   |   Name: FE-TX1
|   |   |   |   Antennas: TX/RX
|   |   |   |   Sensors: temp, lo_locked
|   |   |   |   Freq range: 50.000 to 6000.000 MHz
|   |   |   |   Gain range PGA: 0.0 to 89.8 step 0.2 dB
|   |   |   |   Bandwidth range: 200000.0 to 56000000.0 step 0.0 Hz
|   |   |   |   Connection Type: IQ
|   |   |   |   Uses LO offset: No
|   |   |     _____________________________________________________
|   |   |    /
|   |   |   |       TX Codec: A
|   |   |   |   Name: B210 TX dual DAC
|   |   |   |   Gain Elements: None

4.测试子板工作情况

检查usrp接收功能，运行：

sudo uhd_fft

如果出现以下界面，说明uhd和usrp安装成功了

在这里 3.025GHz出现了峰值，可以说在3.025GHz的频段下有很强的信号

5.可能出现的问题

运行：

sudo uhd_usrp_probe

出现以下错误：

*linux; GNU C++ version 4.8.4; Boost_105400; UHD_003.010.002.000-3-g122bfae1

Error: LookupError: KeyError: No devices found for —–>

Empty Device Address*

运行：

sudo uhd_find_devices

出现以下错误：

*linux; GNU C++ version 4.8.4; Boost_105400; UHD_003.010.002.000-3-g122bfae1

No UHD Devices Found*

解决方法：

这应该是FPGA没有烧写成功的问题，这时候将 USRP 的 USB 连接线从计算机上拔出来，再马上插回去， 重新运行 uhd_usrp_probe这时可以正常烧写固件和 FPGA 镜像了。

参考

1.Ubuntu14.04下GNU Radio的安装以及USRP N210配置
2.USRP配置与测试
3.使用ubuntu1404搭建GnuRadio环境
4.手把手教你搭建USRP在Linux GNU Radio下的开发环境