10 Dec
2012
10 Dec
'12
12:36 p.m.
Hi,
I'm using the sylvain/burst_ind branch and ccch_scan.
this produces bursts files.
with which application can i view them? what is the format of these dat files?
i cannot open them with wireshark...
any hints?
kind regards
10 Dec
10 Dec
2:38 p.m.
with which application can i view them? what
None. You have to write a custom application to use them however you
want to use them ...
is the format of these dat files?
See the l1ctl_burst_ind structure definition in the code.
They're raw bits from the air with a small header, if you haven't read
and understood the GSM 05.03 specs, they'll be pretty useless for you.
i cannot open them with wireshark...
They're at a much lower level of the protocol stack than what
wireshark can display.
Cheers,
Sylvain
2:46 p.m.
Is this the structure of the dat files?
struct l1ctl_burst_ind {
uint32_t frame_nr;
uint16_t band_arfcn; /* ARFCN + band + ul indicator */
uint8_t chan_nr; /* GSM 08.58 channel number (9.3.1) */
uint8_t flags; /* BI_FLG_xxx + burst_id = 2LSBs */
uint8_t rx_level; /* 0 .. 63 in typical GSM notation (dBm+110) */
uint8_t snr; /* Reported SNR >> 8 (0-255) */
uint8_t bits[15]; /* 114 bits + 2 steal bits. Filled MSB first */
} __attribute__((packed));
what does packed mean?
----- Oorspronkelijk e-mail -----
Van: "g roelant" <g.roelant(a)telenet.be>
Aan: "osmocomBB" <baseband-devel(a)lists.osmocom.org>
Verzonden: Maandag 10 december 2012 12:36:49
Onderwerp: bursts dat files
Hi,
I'm using the sylvain/burst_ind branch and ccch_scan.
this produces bursts files.
with which application can i view them? what is the format of these dat files?
i cannot open them with wireshark...
any hints?
kind regards
3:59 p.m.
Hi,
Is this the structure of the dat files?
Yes.
If you had read the code that write those files, you would have known
that already.
struct l1ctl_burst_ind {
uint32_t frame_nr;
uint16_t band_arfcn; /* ARFCN + band + ul indicator */
uint8_t chan_nr; /* GSM 08.58 channel number (9.3.1) */
uint8_t flags; /* BI_FLG_xxx + burst_id = 2LSBs */
uint8_t rx_level; /* 0 .. 63 in typical GSM notation (dBm+110) */
uint8_t snr; /* Reported SNR >> 8 (0-255) */
uint8_t bits[15]; /* 114 bits + 2 steal bits. Filled MSB first */
} __attribute__((packed));
what does packed mean?
http://lmgtfy.com/?q=__attribute__%28%28packed%29%29%3B&l=1
Cheers,
Sylvain
4:11 p.m.
it means that no padding is used to align struct field on word boundaries.
This is a normal way to do things when a struct is to be written in a file or
any other data stream.
Regards
Sebastien
Le 10/12/2012 14:46, g.roelant(a)telenet.be a écrit :
Is this the structure of the dat files?
struct l1ctl_burst_ind {
uint32_t frame_nr;
uint16_t band_arfcn; /* ARFCN + band + ul indicator */
uint8_t chan_nr; /* GSM 08.58 channel number (9.3.1) */
uint8_t flags; /* BI_FLG_xxx + burst_id = 2LSBs */
uint8_t rx_level; /* 0 .. 63 in typical GSM notation (dBm+110) */
uint8_t snr; /* Reported SNR >> 8 (0-255) */
uint8_t bits[15]; /* 114 bits + 2 steal bits. Filled MSB first */
} __attribute__((packed));
what does packed mean?
--------------------------------------------------------------------------------
*Van: *"g roelant" <g.roelant(a)telenet.be>
*Aan: *"osmocomBB" <baseband-devel(a)lists.osmocom.org>
*Verzonden: *Maandag 10 december 2012 12:36:49
*Onderwerp: *bursts dat files
Hi,
I'm using the sylvain/burst_ind branch and ccch_scan.
this produces bursts files.
with which application can i view them? what is the format of these dat files?
i cannot open them with wireshark...
any hints?
kind regards
4:31 p.m.
On Mon, Dec 10, 2012 at 02:46:26PM +0100, g.roelant(a)telenet.be wrote:
} __attribute__((packed));
what does packed mean?
http://gcc.gnu.org/onlinedocs/gcc-4.7.1/gcc/Type-Attributes.html#Type-Attri…
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5 comments
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participants (4)
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g.roelant＠telenet.be -
Holger Hans Peter Freyther -
Sebastien Lorquet -
Sylvain Munaut