osmocom-sdr May 2012

osmocom-sdr@lists.osmocom.org

20 participants
20 discussions

Tuning gap between 325 and 350 MHz
by Kire Pudsje 27 May '12

27 May '12

Also posted on reddit: I measured another stick and this time I also noticed the gap between 325 and 350 MHz, as was reported earlier by Roger on reddit. http://www.reddit.com/r/RTLSDR/comments/tftz4/some_frequency_response_measu… I could trace it back to the fact that the E4K_REG_SYNTH is not set properly. I do not know why yet, but first setting a different value from the desired one seems to fix the problem. It might be the wrong solution for the wrong problem, but it seems to work for me. change this line in tuner_e4k.c:448 rc = e4k_reg_set_mask(e4k, E4K_REG_SYNTH1, 0x06, band << 1); to: uint8_t tmp = e4k_reg_read(e4k, E4K_REG_SYNTH1) & ~0x06; tmp |= (band << 1) & 0x06; e4k_reg_write(e4k, E4K_REG_SYNTH1, tmp ^ 0x06); rc = e4k_reg_write(e4k, E4K_REG_SYNTH1, tmp); Kire.

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Building with autotools - missing -lpthreads
by Joschi Brauchle 26 May '12

26 May '12

Hello all, when trying to build with autotools, I get an compile error stating that there is a: ---- undefined reference to symbol 'pthread_create@@GLIBC_2.2.5' ---- This seems to be due to "-lpthreads" is missing when using autotools1 -- Dipl.-Ing. Joschi Brauchle, M.Sc. Institute for Communications Engineering (LNT) Technische Universitaet Muenchen (TUM) 80290 Munich, Germany Tel (work): +49 89 289-23474 Fax (work): +49 89 289-23490 E-mail: joschi.brauchle(a)tum.de Web: http://www.lnt.ei.tum.de/

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Octave wrapper for rtl-sdr
by Kire Pudsje 25 May '12

25 May '12

I wrote for myself an octave wrapper for all functions in the header file of the rtl-sdr library. Even the async routine generates a callback to octave functions. The whole is a 1-to-1 mapping of the functions, I tried to stay as close as possible to the C-library. I do not know if it just me using octave, but if there is any interest in this code, I could place it somewhere. sample code: pkg load rtlsdr if rtlsdr_get_device_count()>0 dev = rtlsdr_open(0); samprate=2048e3; nsamples=2048; rtlsdr_set_sample_rate(dev, samprate); rtlsdr_set_center_freq(dev, 100e6); rtlsdr_set_tuner_gain_mode(dev, 0); rtlsdr_reset_buffer(dev); buf = rtlsdr_read_sync(dev, nsamples * 2); d = (double(buf) - 128) / 128.0; d = d(1:2:end) + 1i * d(2:2:end); f = (-.5:1/nsamples:.5-1/nsamples) * samprate; plot(f, 20*log10(abs(fftshift(fft(d .* blackman(nsamples)') / nsamples)))); rtlsdr_close(dev); end

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PATCH: Silence warning about int/socklen_t signedness
by Christian Vogel 25 May '12

25 May '12

There's only one warning for me when compiling rtl-sdr, which is about the signedness of the third (size) argument in accept(). On linux it's socklen_t* and I *think* (google...) that windows does not have socklen_t at all. In accept it uses int. ftp://ftp.microsoft.com/bussys/winsock/winsock2/winsock2.h WINSOCK_API_LINKAGE SOCKET WSAAPI accept( IN SOCKET s, OUT struct sockaddr FAR * addr, IN OUT int FAR * addrlen ); Can someone please check if it compiles on windows with the attached patch?

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[PATCH] Silence warning about socklen_t/int sign.
by Christian Vogel 25 May '12

25 May '12

rtl_tcp.c:457:57: warning: pointer types point to integer types with different sign passing 'int *', expected 'socklen_t *' [-Wpointer-sign] --- src/rtl_tcp.c | 9 +++++++-- 1 files changed, 7 insertions(+), 2 deletions(-) diff --git a/src/rtl_tcp.c b/src/rtl_tcp.c index 8b2cf44..849192b 100644 --- a/src/rtl_tcp.c +++ b/src/rtl_tcp.c @@ -42,6 +42,9 @@ #ifdef _WIN32 #pragma comment(lib, "ws2_32.lib") + +typedef int socklen_t; + #else #define closesocket close #define SOCKADDR struct sockaddr @@ -453,8 +456,10 @@ int main(int argc, char **argv) if(do_exit) { goto out; } else if(r) { - r=sizeof(remote); - s = accept(listensocket,(struct sockaddr *)&remote, &r); + socklen_t rlen; + + rlen=sizeof(remote); + s = accept(listensocket,(struct sockaddr *)&remote, &rlen); break; } } -- 1.7.0.4 --Nq2Wo0NMKNjxTN9z--

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[PATCH] FC0012 doc and fixes
by Michael Karcher 24 May '12

24 May '12

Fix selection of VCO band (needed for example to get to 166 MHz) for the FC0012 tuner, and add a lot of register descriptions. Signed-Off-by: Michael Karcher <osmosdr(a)mkarcher.dialup.fu-berlin.de> --- src/tuner_fc0012.c | 49 +++++++++++++++++++++++++++++++++---------------- 1 file changed, 33 insertions(+), 16 deletions(-) diff --git a/src/tuner_fc0012.c b/src/tuner_fc0012.c index 104a4f7..2d66f3c 100644 --- a/src/tuner_fc0012.c +++ b/src/tuner_fc0012.c @@ -20,21 +20,35 @@ /* Incomplete list of register settings: * * Name Reg Bits Desc + * CHIP_ID 0x00 0-7 Chip ID (constant 0xA1) + * RF_A 0x01 0-3 Number of count-to-9 cycles in RF + * divider (suggested: 2..9) + * RF_M 0x02 0-7 Total number of cycles (to-8 and to-9) + * in RF divider + * RF_K_HIGH 0x03 0-6 Bits 8..14 of fractional divider + * RF_K_LOW 0x04 0-7 Bits 0..7 of fractional RF divider + * RF_OUTDIV_A 0x05 3-7 Power of two required? * LNA_POWER_DOWN 0x06 0 Set to 1 to switch off low noise amp - * VCO_SPEED 0x06 3 Set the speed of the VCO. example - * driver hardcodes to 1 for some reason + * RF_OUTDIV_B 0x06 1 Set to select 3 instead of 2 for the + * RF output divider + * VCO_SPEED 0x06 3 Select tuning range of VCO: + * 0 = Low range, (ca. 1.1 - 1.5GHz) + * 1 = High range (ca. 1.4 - 1.8GHz) * BANDWIDTH 0x06 6-7 Set bandwidth. 6MHz = 0x80, 7MHz=0x40 * 8MHz=0x00 * XTAL_SPEED 0x07 5 Set to 1 for 28.8MHz Crystal input * or 0 for 36MHz + * <agc params> 0x08 0-7 * EN_CAL_RSSI 0x09 4 Enable calibrate RSSI * (Receive Signal Strength Indicator) * LNA_FORCE 0x0d 0 * AGC_FORCE 0x0d ? - * LNA_GAIN 0x13 0-4 Low noise amp gain + * LNA_GAIN 0x13 3-4 Low noise amp gain * LNA_COMPS 0x15 3 ? * VCO_CALIB 0x0e 7 Set high then low to calibrate VCO - * + * (fast lock?) + * VCO_VOLTAGE 0x0e 0-6 Read Control voltage of VCO + * (big value -> low freq) */ /* glue functions to rtl-sdr code */ @@ -99,12 +113,11 @@ void FC0012_Dump_Registers() DEBUGF("LNA Force:\t%s\n", (regBuf & 0x1) ? "Forced" : "Not Forced"); FC0012_Read(pTuner, 0x13, &regBuf); DEBUGF("LNA Gain:\t"); - switch (regBuf) { - case (0x10): DEBUGF("19.7dB\n"); break; - case (0x17): DEBUGF("17.9dB\n"); break; - case (0x08): DEBUGF("7.1dB\n"); break; - case (0x02): DEBUGF("-9.9dB\n"); break; - default: DEBUGF("unknown gain value 0x02x\n"); + switch (regBuf & 0x18) { + case (0x00): DEBUGF("Low\n"); break; + case (0x08): DEBUGF("Middle\n"); break; + case (0x10): DEBUGF("High\n"); break; + default: DEBUGF("unknown gain value 0x18\n"); } #endif } @@ -173,7 +186,7 @@ void FC0012_Frequency_Control(unsigned int Frequency, unsigned short Bandwidth) int FC0012_SetFrequency(void *pTuner, unsigned long Frequency, unsigned short Bandwidth) { - int VCO1 = 0; + int VCO_band = 0; unsigned long doubleVCO; unsigned short xin, xdiv; unsigned char reg[21], am, pm, multi; @@ -230,7 +243,7 @@ int FC0012_SetFrequency(void *pTuner, unsigned long Frequency, unsigned short Ba doubleVCO = Frequency * multi; reg[6] = reg[6] | 0x08; - VCO1 = 1; + VCO_band = 1; xdiv = (unsigned short)(doubleVCO / (CrystalFreqKhz / 2)); if( (doubleVCO - xdiv * (CrystalFreqKhz / 2)) >= (CrystalFreqKhz / 4) ) xdiv = xdiv + 1; @@ -269,7 +282,6 @@ int FC0012_SetFrequency(void *pTuner, unsigned long Frequency, unsigned short Ba if (FC0012_Write(pTuner, 0x03, reg[3])) return -1; if (FC0012_Write(pTuner, 0x04, reg[4])) return -1; //reg[5] = reg[5] | 0x07; // This is really not cool. Why is it there? - // Same with hardcoding VCO=1 if (FC0012_Write(pTuner, 0x05, reg[5])) return -1; if (FC0012_Write(pTuner, 0x06, reg[6])) return -1; @@ -277,16 +289,19 @@ int FC0012_SetFrequency(void *pTuner, unsigned long Frequency, unsigned short Ba if (FC0012_Write(pTuner, 0x0E, 0x80)) return -1; if (FC0012_Write(pTuner, 0x0E, 0x00)) return -1; - // VCO Re-Calibration if needed + // Read resulting VCO control voltage if (FC0012_Write(pTuner, 0x0E, 0x00)) return -1; if (FC0012_Read(pTuner, 0x0E, &read_byte)) return -1; reg[14] = 0x3F & read_byte; - if (VCO1) + // Adjust VCO range if control voltage is at the limit + if (VCO_band) { + // high-band VCO hitting low frequency bound if (reg[14] > 0x3C) { - reg[6] = 0x08 | reg[6]; + // select low-band VCO + reg[6] = ~0x08 & reg[6]; if (FC0012_Write(pTuner, 0x06, reg[6])) return -1; if (FC0012_Write(pTuner, 0x0E, 0x80)) return -1; @@ -295,7 +310,9 @@ int FC0012_SetFrequency(void *pTuner, unsigned long Frequency, unsigned short Ba } else { + // low-band VCO hitting high frequency bound if (reg[14] < 0x02) { + // select high-band VCO reg[6] = 0x08 | reg[6]; if (FC0012_Write(pTuner, 0x06, reg[6])) return -1; -- 1.7.10

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RTL-SDR Help
by Erick Schumacher 21 May '12

21 May '12

Hello group I need help getting an EZCAP USB deviceusing rtl_sdr running under Windoz7. This is probably the same bug reported on ticket 9 at http://sdr.osmocom.org/trac/query My EZCAP USB device self installs the drivers in Win7 and is recognized by the DVBDream program. Leads me to believe my system and hardware is OK. Below is a screen shot of what happens I try to load RTL-SDR.. I am an RF guy and a serious newby to software so can't contribute much. Help! Eric

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[PATCH] Add support for PROlectrix dongle
by David J. Fiddes 20 May '12

20 May '12

Hi, This adds support for another RTL2832U based device. I've been able to receive FM broadcasts using GNU Radio and rtl-sdr with this device. Dave Subject: [PATCH] Add support for PROlectrix dongle Incorporate support for the PROlectrix DV107669 which appears to be another variant of G-Tek RTL2832U device. This has a FC0012 tuner. Signed-off-by: David J. Fiddes <D.J(a)fiddes.net> --- rtl-sdr.rules | 3 +++ src/librtlsdr.c | 1 + 2 files changed, 4 insertions(+) diff --git a/rtl-sdr.rules b/rtl-sdr.rules index d5e812f..b775916 100644 --- a/rtl-sdr.rules +++ b/rtl-sdr.rules @@ -51,6 +51,9 @@ SUBSYSTEMS=="usb", ATTRS{idVendor}=="1f4d", ATTRS{idProduct}=="b803", MODE:="066 # Lifeview LV5TDeluxe (FC0012) SUBSYSTEMS=="usb", ATTRS{idVendor}=="1f4d", ATTRS{idProduct}=="c803", MODE:="0666" +# PROlectrix DV107669 (FC0012) +SUBSYSTEMS=="usb", ATTRS{idVendor}=="1f4d", ATTRS{idProduct}=="d803", MODE:="0666" + # Twintech UT-40 (FC0013) SUBSYSTEMS=="usb", ATTRS{idVendor}=="1b80", ATTRS{idProduct}=="d3a4", MODE:="0666" diff --git a/src/librtlsdr.c b/src/librtlsdr.c index d961985..ba14942 100644 --- a/src/librtlsdr.c +++ b/src/librtlsdr.c @@ -210,6 +210,7 @@ static rtlsdr_dongle_t known_devices[] = { { 0x185b, 0x0680, "Compro Videomate U680F"}, { 0x1f4d, 0xb803, "GTek T803" }, { 0x1f4d, 0xc803, "Lifeview LV5TDeluxe" }, + { 0x1f4d, 0xd803, "PROlectrix DV107669" }, { 0x1b80, 0xd3a4, "Twintech UT-40" }, { 0x1d19, 0x1101, "Dexatek DK DVB-T Dongle (Logilink VG0002A)" }, { 0x1d19, 0x1102, "Dexatek DK DVB-T Dongle (MSI DigiVox mini II V3.0)" },

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[PATCH] librtlsdr: libusb detach kernel driver before claiming interface
by p.munoz＠alumnos.upm.es 19 May '12

19 May '12

From: Pablo Muñoz <p.munoz(a)alumnos.upm.es> rtl_sdr founds ezcap USB dongle but exits with usb_claim_interface error -6 Signed-off-by: Pablo Muñoz <p.munoz(a)alumnos.upm.es> --- src/librtlsdr.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/src/librtlsdr.c b/src/librtlsdr.c index 7721c4a..0599722 100644 --- a/src/librtlsdr.c +++ b/src/librtlsdr.c @@ -865,7 +865,7 @@ int rtlsdr_open(rtlsdr_dev_t **out_dev, uint32_t index) } libusb_free_device_list(list, 1); - + libusb_detach_kernel_driver(dev->devh,0); r = libusb_claim_interface(dev->devh, 0); if (r < 0) { fprintf(stderr, "usb_claim_interface error %d\n", r); -- 1.7.10

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Fwd: Calculation of allowed vco frequency in osmocom sources
by Harald Welte 18 May '12

18 May '12

Hi all, with permission of its author, I'm forwarding this message to the list. Regards, Harald -- - Harald Welte <laforge(a)gnumonks.org> http://laforge.gnumonks.org/ ============================================================================ "Privacy in residential applications is a desirable marketing option." (ETSI EN 300 175-7 Ch. A6)

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osmocom-sdr May 2012