[Discuss-gnuradio] Magnitude == RSSI?

2012-06-10 Thread Matthias Schäfer
I've noticed that some dboards have RSSI sensors while others don't. Since I'm using a SBX (rev 3) which doesn't seem to have such a sensor, I'm wondering if it's also correct to use the magnitude of the samples as an indicator for the RSS or is this value somehow "distorted"? Cheers, Matthias

[Discuss-gnuradio] E100/E110 Documentation

2012-02-17 Thread Matthias Schäfer
Hi List, is there any documentation about the e-series of the usrps (except the application notes and the datasheet) out there? I'm especially searching for informations about how to install the images, how to start and -- at best -- a little example application. Cheers, Matthias __

Re: [Discuss-gnuradio] DBSRX Error in Latest GR+UHD

2011-12-15 Thread Matthias Schäfer
Hi, still have the error with the latest git of uhd: matze@matze-Studio-XPS-435MT:~/Downloads/uhd/firmware/fx2/usrp1$ uhd_usrp_probe linux; GNU C++ version 4.6.1; Boost_104601; UHD_003.004.000-4f40325 -- Loading firmware image: /home/matze/Downloads/uhd/firmware/fx2/usrp1/usrp1_fw.ihx... done

[Discuss-gnuradio] PPM Signal Generation

2011-12-09 Thread Matthias Schäfer
Hi, is it possible to generate a PPM signal with GNU Radio + USRP2 with a bit rate of 1MBit/s? In particular, I want to transmit Mode-S replies which are modulated using PPM on 1090Mhz. In order to do so, I have to send 0.5µs wide pulses with time-shifts of 0 µs or 0.5 µs. The generation of

Re: [Discuss-gnuradio] XCVR2450: Switch between sending/receiving mode

2010-10-11 Thread Matthias Schäfer
Well, I set the ATR registers as follows: #define atr_reg(x) *(uint16_t *)(0xE400+x) // set ATR registers atr_reg(ATR_IDLE_TXSIDE) = (HB_PA_OFF_TXIO | TX_DIS_TXIO); atr_reg(ATR_INTX_TXSIDE) = (ANTSEL_TX2_RX1_TXIO | HB_PA_OFF_TXIO | TX_ENB_TXIO); atr_reg(ATR_INRX_TXSIDE) = (AN

[Discuss-gnuradio] XCVR2450: Switch between sending/receiving mode

2010-10-08 Thread Matthias Schäfer
Hi List, I'm using the latest uhd fpga code and my own f/w on a USRP2 with the XCVR2450 (REV 692) dboard. After the tuning is done by the host, sending from f/w is no problem. Also receiving works fine after setting sr_rx_ctrl->cmd = (0xE000 | BP_NLINES); sr_rx_ctrl->t

Re: [Discuss-gnuradio] Firmware issue: Send a constant signal with the xcvr2450 dboard

2010-09-16 Thread Matthias Schäfer
Am 16.09.2010 07:49, schrieb Eric Blossom: > On Wed, Sep 15, 2010 at 05:55:12PM +0200, Matthias Schäfer wrote: >> Hi List, >> I'm currently working on a standalone firmware app for USRP2. My >> goal is to send a constant signal with the xcvr2450 dboard. I >> sk

[Discuss-gnuradio] Firmware issue: Send a constant signal with the xcvr2450 dboard

2010-09-15 Thread Matthias Schäfer
Hi List, I'm currently working on a standalone firmware app for USRP2. My goal is to send a constant signal with the xcvr2450 dboard. I skipped the tuning via firmware by doing this prior from a host using the simple_usrp c++ interface: uhd::usrp::simple_usrp::sptr sdev = uhd::usrp::simple_u

Re: [Discuss-gnuradio] No response when using self-compiled FPGA code

2010-09-08 Thread Matthias Schäfer
Solved it: I was using the wrong Makefile. Using the Makefile.udp, it work's fine. Cheers, Matthias Am 01.09.2010 15:00, schrieb Matthias Schäfer: > Hi List, > I compiled the newest fpga code from the uhd-repository (u2_rev3) with > Xilinx' ISE 12.2. I also used the newes

[Discuss-gnuradio] No response when using self-compiled FPGA code

2010-09-01 Thread Matthias Schäfer
Hi List, I compiled the newest fpga code from the uhd-repository (u2_rev3) with Xilinx' ISE 12.2. I also used the newest firmware which is available online (20100901) and also tried some other versions but the USRP2 does not send a response to arp requests or icmp ping messages. So uhd_usrp_probe

[Discuss-gnuradio] How to set the frequency from firmware

2010-07-28 Thread Matthias Schäfer
Hi List, I'm working on a firmware for a completely standalone usrp2 sender. How is that 32 bits integer dsp_tx_regs->freq interpreted by the hardware and which value do I need to send e.g. on the 802.11g channel 11 (2.462 GHz)? Cheers, Matthias _

[Discuss-gnuradio] Sending without host

2010-07-18 Thread Matthias Schäfer
Hi list, I want to send data direct from the firmware without host. I looked at the tx_standalone.c and there came up some questions: 1. Do I have to encapsulate my data into a ethernet packet like it's done there or can I simply put something into the buffer pool and set the first_line-argu