Hi, I encount some problem when I run the OpenBTS source code with usrp.
First, I have made some check of the usrp to ensure that it work in the right state, as follows: r...@apple-laptop:~/download/software/gnuradio-3.2.2/usrp/host/apps#./test_usrp_standard_rx xfered 1.34e+08 bytes in 4.19 seconds. 3.2e+07 bytes/sec. cpu time = 0.62 noverruns = 0 r...@apple-laptop:~/download/software/gnuradio-3.2.2/usrp/host/apps#./test_usrp_standard_tx which: 0 interp: 16 rf_freq: -1 amp: 10000.000000 nsamples: 3.2e+07 Subdevice name is Flex 1800 Tx MIMO B Subdevice freq range: (1.6e+09, 2e+09) mux: 0x000098 baseband rate: 8e+06 target_freq: 1800000000.000000 ok: true r.baseband_freq: 1804000000.000000 r.dxc_freq: -4000000.000000 r.residual_freq: 0.000000 r.inverted: 0 tx_underrun tx_underrun tx_underrun tx_underrun tx_underrun tx_underrun tx_underrun tx_underrun tx_underrun xfered 3.2e+07 bytes in 1.18 seconds. 2.715e+07 bytes/sec. cpu time = 0.132 9 underruns But when I run the OpenBTS code, it will return false in "m_uRx->read_io(1)" which is in the end of the following code. (after the function "compute_regs", freq=1739800000.000000, R=3407936, control=5228836, N=4208152, actual_freq=1740000000.000000) (I use the operating band "DCS1800") usrp_standard_rx_sptr m_uRx; bool USRPDevice::rx_setFreq(double freq, double *actual_freq) { unsigned R, control, N; if (!compute_regs(freq, &R, &control, &N, actual_freq)) return false; if (R==0) return false; m_uRx->_write_spi(0,SPI_ENABLE_RX_B,SPI_FMT_MSB | SPI_FMT_HDR_0,write_it((R & ~0x3) | 1)); m_uRx->_write_spi(0,SPI_ENABLE_RX_B,SPI_FMT_MSB | SPI_FMT_HDR_0,write_it((control & ~0x3) | 0)); usleep(10000); m_uRx->_write_spi(0,SPI_ENABLE_RX_B,SPI_FMT_MSB | SPI_FMT_HDR_0, write_it((N & ~0x3) | 2)); if (m_uRx->read_io(1) & PLL_LOCK_DETECT) return true; if (m_uRx->read_io(1) & PLL_LOCK_DETECT) return true; return false; } And I try to use the mobile phone to find the network make up by the usrp, but I can only find the networks "中国移动" and "中国联通".(The sim card is belong to "中国移动"). (But I have add the mobile phone’s IMIS to “sip.conf” in etc/Asterisk/ and add something like “exten => 2103,1,Macro(dialGSM,310410186585291)” to the “extensions.conf” ) I don't know what's wrong , could you give me some advice? Thanks very much! Best wishes:) Pingping
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