[linux-dvb] how can this work, what can I do?

Udo van den Heuvel udovdh at xs4all.nl
Sun Feb 18 10:55:28 CET 2007


Hello,

I have a VIA Epia EN12000 board, a dual riser card and Terratec 1200
DVB-S and DVB-T cards.
The EN12000 is equipped with a PCI riser like the one here:
http://www.tranquilpc-shop.co.uk/acatalog/info%5f2%2ehtml
Please also see
http://www.tranquilpc-shop.co.uk/acatalog/PCI_Risers.html and
http://www.tranquilpc.co.uk/support/Files/TPC014/Tranquil%20Riser.pdf
for info about how the riser works. DVB-T card is in the top position,
DVB-S card is in the lower position.

I am wondering how my DVB-T card can work since discovering the
interrupt issues with kernel 2.6.20 and my setup.

When booting into the stock 2.6.20 kernel my DVB-T card's frontend is
not reachable via i2c. DVB-S card's frontend `works` (is reachable).

When booting 2.6.20 in polled mode (small patch), the DVB-T card's
frontend is also accessible. I was told that for succesfully using a DVB
card we need a working frontend *and* irq/DMA for the TS.
My DVB-T card works but it appears it has *no* working interrupt due to
the riser card.
How can this be? How can this work?
(System is 80% idle while running MythTV and showing a SD TV-channel.)

I also noticed I can use tzap successully without having i2c-dev loaded.
How come?

How does the Device Number scheme works w.r.t. influencing what
interrupt goes where? Can I find out what inerrupt my DVB-cards are
really connected to (instead of what the kernel thinks)?
Can I explain the kernel how stuff is connected?
(DN 20 is the PCI slot, DN19 is the extra card in the riser)

Below is some output. If you have questiond or want to see more please
let me know.

I am very interested in learning how this works and how I could fix the
issues. Please CC me a reply so I can more easily send mail to the list.
If some questions are better asked elsewhere, please let me know.

Thanks,
Udo









Situation with stock 2.6.20 kernel:

    i2c-2       i2c             TerraTec Cinergy 1200 DVB-S
    i2c-1       i2c             Terratec Cinergy 1200 DVB-T
    i2c-0       smbus           SMBus Via Pro adapter at 0500

# date;i2cdetect -y 0;date
Sun Feb 18 09:03:08 CET 2007
     0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f
00:          XX XX XX XX XX XX XX XX XX XX XX XX XX
10: XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX
20: XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX
30: 30 XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX
40: XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX
50: UU XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX
60: XX XX XX XX XX XX XX XX XX 69 XX XX XX XX XX XX
70: XX XX XX XX XX XX XX XX

[root at recorder ~]# date;i2cdetect -y 1;date
Sun Feb 18 09:01:20 CET 2007
     0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f
00:          XX XX XX XX XX XX XX XX XX XX XX XX XX
10: XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX
20: XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX
30: XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX
40: XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX
50: XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX
60: XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX
70: XX XX XX XX XX XX XX XX
Sun Feb 18 09:02:01 CET 2007
[root at recorder ~]# date;i2cdetect -y 2;date
Sun Feb 18 09:02:06 CET 2007
     0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f
00:          XX XX XX XX XX XX XX XX XX XX XX XX XX
10: XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX
20: XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX
30: XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX
40: XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX
50: UU XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX
60: XX XX XX XX XX XX XX XX 68 XX XX XX XX XX XX XX
70: XX XX XX XX XX XX XX XX
Sun Feb 18 09:02:12 CET 2007

[root at recorder ~]# cat /proc/interrupts
           CPU0
  0:     176095   IO-APIC-edge      timer
  1:          8   IO-APIC-edge      i8042
  8:          1   IO-APIC-edge      rtc
  9:          0   IO-APIC-fasteoi   acpi
 12:        105   IO-APIC-edge      i8042
 14:       5925   IO-APIC-edge      ide0
 16:          0   IO-APIC-fasteoi   saa7146 (0)
 17:        895   IO-APIC-fasteoi   eth0
 18:      22840   IO-APIC-fasteoi   libata
 19:          0   IO-APIC-fasteoi   uhci_hcd:usb1, uhci_hcd:usb2,
uhci_hcd:usb3, ehci_hcd:usb4
 20:        483   IO-APIC-fasteoi   saa7146 (1), ohci1394
 21:          0   IO-APIC-fasteoi   VIA8237
NMI:          0
LOC:     176055
ERR:          0
MIS:          0
[root at recorder ~]# lspci
00:00.0 Host bridge: VIA Technologies, Inc. CN700/VN800/P4M800CE/Pro
Host Bridge
00:00.1 Host bridge: VIA Technologies, Inc. CN700/VN800/P4M800CE/Pro
Host Bridge
00:00.2 Host bridge: VIA Technologies, Inc. CN700/VN800/P4M800CE/Pro
Host Bridge
00:00.3 Host bridge: VIA Technologies, Inc. PT890 Host Bridge
00:00.4 Host bridge: VIA Technologies, Inc. CN700/VN800/P4M800CE/Pro
Host Bridge
00:00.7 Host bridge: VIA Technologies, Inc. CN700/VN800/P4M800CE/Pro
Host Bridge
00:01.0 PCI bridge: VIA Technologies, Inc. VT8237 PCI Bridge
00:0d.0 FireWire (IEEE 1394): VIA Technologies, Inc. IEEE 1394 Host
Controller (rev 80)
00:0e.0 Ethernet controller: VIA Technologies, Inc. VT6120/VT6121/VT6122
Gigabit Ethernet Adapter (rev 11)
00:0f.0 IDE interface: VIA Technologies, Inc. VIA VT6420 SATA RAID
Controller (rev 80)
00:0f.1 IDE interface: VIA Technologies, Inc.
VT82C586A/B/VT82C686/A/B/VT823x/A/C PIPC Bus Master IDE (rev 06)
00:10.0 USB Controller: VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1
Controller (rev 81)
00:10.1 USB Controller: VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1
Controller (rev 81)
00:10.2 USB Controller: VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1
Controller (rev 81)
00:10.4 USB Controller: VIA Technologies, Inc. USB 2.0 (rev 86)
00:11.0 ISA bridge: VIA Technologies, Inc. VT8237 ISA bridge
[KT600/K8T800/K8T890 South]
00:11.5 Multimedia audio controller: VIA Technologies, Inc.
VT8233/A/8235/8237 AC97 Audio Controller (rev 60)
00:13.0 Multimedia controller: Philips Semiconductors SAA7146 (rev 01)
00:14.0 Multimedia controller: Philips Semiconductors SAA7146 (rev 01)
01:00.0 VGA compatible controller: VIA Technologies, Inc. UniChrome Pro
IGP (rev 01)







Situation with 2.6.20 in polled mode:

    i2c-2       i2c             TerraTec Cinergy 1200 DVB-S
    i2c-1       i2c             Terratec Cinergy 1200 DVB-T
    i2c-0       smbus           SMBus Via Pro adapter at 0500

[root at recorder ~]# date;i2cdetect -y 0;date
Sun Feb 18 09:12:47 CET 2007
     0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f
00:          XX XX XX XX XX XX XX XX XX XX XX XX XX
10: XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX
20: XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX
30: 30 XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX
40: XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX
50: UU XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX
60: XX XX XX XX XX XX XX XX XX 69 XX XX XX XX XX XX
70: XX XX XX XX XX XX XX XX
Sun Feb 18 09:12:48 CET 2007
[root at recorder ~]# date;i2cdetect -y 1;date
Sun Feb 18 09:12:51 CET 2007
     0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f
00:          XX XX XX XX XX 08 XX XX XX XX XX XX XX
10: XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX
20: XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX
30: XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX
40: XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX
50: UU XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX
60: XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX
70: XX XX XX XX XX XX XX XX
Sun Feb 18 09:13:26 CET 2007
[root at recorder ~]# date;i2cdetect -y 2;date
Sun Feb 18 09:13:29 CET 2007
     0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f
00:          XX XX XX XX XX XX XX XX XX XX XX XX XX
10: XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX
20: XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX
30: XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX
40: XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX
50: UU XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX
60: XX XX XX XX XX XX XX XX 68 XX XX XX XX XX XX XX
70: XX XX XX XX XX XX XX XX
Sun Feb 18 09:14:04 CET 2007
[root at recorder ~]# i2cdump -y 2 0x68
No size specified (using byte-data access)
     0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f    0123456789abcdef
00: a1 18 34 2a 8e 0f a2 00 60 00 52 00 f0 81 23 54    ??4*???.`.R.??#T
10: 74 88 f7 88 5c 14 80 03 ff ff 80 00 f0 b2 ff 80    t???\???..?.??.?
20: 00 00 00 00 4a f6 59 00 01 1e 14 0f 09 05 18 0b    ....J?Y.????????
30: 21 1f 19 f8 01 60 00 00 00 00 00 00 00 00 00 00    !????`..........
40: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 a0    ...............?
50: a0 a0 a0 a0 a0 a0 a0 a0 a0 a0 a0 a0 a0 a0 a0 a0    ????????????????
60: a0 a0 a0 a0 a0 a0 a0 a0 a0 a0 a0 a0 a0 a0 a0 a0    ????????????????
70: a0 a0 a0 a0 a0 a0 a0 a0 a0 a0 a0 a0 a0 a0 a0 a0    ????????????????
80: a1 18 34 2a 8e 0f a2 00 60 00 52 00 f0 81 23 54    ??4*???.`.R.??#T
90: 74 88 f7 88 5c 14 80 04 ff ff 81 00 ef b2 46 80    t???\???..?.??F?
a0: 00 00 00 ff 4a 04 50 00 01 1e 14 0f 09 05 18 0b    ....J?P.????????
b0: 21 1f 19 f8 01 60 00 00 00 00 00 00 00 00 00 00    !????`..........
c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 a0    ...............?
d0: a0 a0 a0 a0 a0 a0 a0 a0 a0 a0 a0 a0 a0 a0 a0 a0    ????????????????
e0: a0 a0 a0 a0 a0 a0 a0 a0 a0 a0 a0 a0 a0 a0 a0 a0    ????????????????
f0: a0 a0 a0 a0 a0 a0 a0 a0 a0 a0 a0 a0 a0 a0 a0 a0    ????????????????

[root at recorder ~]# i2cdump -y 1 0x08
No size specified (using byte-data access)
     0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f    0123456789abcdef
00: 46 90 1e 00 00 00 00 01 00 00 00 00 00 00 00 00    F??....?........
10: 00 67 00 00 00 00 a8 a8 00 00 00 00 00 00 07 c0    .g....??......??
20: c0 08 c2 6e 00 00 00 00 00 00 00 00 00 f0 f0 08    ???n.........???
30: 00 00 00 00 00 00 00 38 38 38 80 ff ff 60 67 00    .......888?..`g.
40: 00 dc 20 01 cc 08 12 00 ff 00 ff 4e 17 00 00 1f    .? ????....N?..?
50: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00    ................
60: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00    ................
70: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00    ................
80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00    ................
90: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00    ................
a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00    ................
b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00    ................
c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00    ................
d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00    ................
e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00    ................
f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00    ................

[root at recorder ~]# cat /proc/interrupts
           CPU0
  0:     119399   IO-APIC-edge      timer
  1:          8   IO-APIC-edge      i8042
  8:          1   IO-APIC-edge      rtc
  9:          0   IO-APIC-fasteoi   acpi
 12:        105   IO-APIC-edge      i8042
 14:       3855   IO-APIC-edge      ide0
 16:          0   IO-APIC-fasteoi   saa7146 (0)
 17:        456   IO-APIC-fasteoi   eth0
 18:      31795   IO-APIC-fasteoi   libata
 19:          0   IO-APIC-fasteoi   uhci_hcd:usb1, uhci_hcd:usb2,
uhci_hcd:usb3, ehci_hcd:usb4
 20:          2   IO-APIC-fasteoi   ohci1394, saa7146 (1)
 21:          0   IO-APIC-fasteoi   VIA8237
NMI:          0
LOC:     119343
ERR:          0
MIS:          0
[root at recorder ~]# lspci
00:00.0 Host bridge: VIA Technologies, Inc. CN700/VN800/P4M800CE/Pro
Host Bridge
00:00.1 Host bridge: VIA Technologies, Inc. CN700/VN800/P4M800CE/Pro
Host Bridge
00:00.2 Host bridge: VIA Technologies, Inc. CN700/VN800/P4M800CE/Pro
Host Bridge
00:00.3 Host bridge: VIA Technologies, Inc. PT890 Host Bridge
00:00.4 Host bridge: VIA Technologies, Inc. CN700/VN800/P4M800CE/Pro
Host Bridge
00:00.7 Host bridge: VIA Technologies, Inc. CN700/VN800/P4M800CE/Pro
Host Bridge
00:01.0 PCI bridge: VIA Technologies, Inc. VT8237 PCI Bridge
00:0d.0 FireWire (IEEE 1394): VIA Technologies, Inc. IEEE 1394 Host
Controller (v 80)
00:0e.0 Ethernet controller: VIA Technologies, Inc. VT6120/VT6121/VT6122
Gigabit Ethernet Adapter (rev 11)
00:0f.0 IDE interface: VIA Technologies, Inc. VIA VT6420 SATA RAID
Controller (rev 80)
00:0f.1 IDE interface: VIA Technologies, Inc.
VT82C586A/B/VT82C686/A/B/VT823x/A/C PIPC Bus Master IDE (rev 06)
00:10.0 USB Controller: VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1
Controller (rev 81)
00:10.1 USB Controller: VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1
Controller (rev 81)
00:10.2 USB Controller: VIA Technologies, Inc. VT82xxxxx UHCI USB 1.1
Controller  (rev 81)
00:10.4 USB Controller: VIA Technologies, Inc. USB 2.0 (rev 86)
00:11.0 ISA bridge: VIA Technologies, Inc. VT8237 ISA bridge
[KT600/K8T800/K8T890 South]
00:11.5 Multimedia audio controller: VIA Technologies, Inc.
VT8233/A/8235/8237 AC97 Audio Controller (rev 60)
00:13.0 Multimedia controller: Philips Semiconductors SAA7146 (rev 01)
00:14.0 Multimedia controller: Philips Semiconductors SAA7146 (rev 01)
01:00.0 VGA compatible controller: VIA Technologies, Inc. UniChrome Pro
IGP (rev 01)


Strange i2c-dev thing, polled mode:

[root at recorder ~]# tzap -a0  'Nederland 2'
using '/dev/dvb/adapter0/frontend0' and '/dev/dvb/adapter0/demux0'
tuning to 722000000 Hz
video pid 0x1b6d, audio pid 0x1b6e
status 00 | signal 0000 | snr 7171 | ber 0001fffe | unc ffffffff |
status 00 | signal 4d4d | snr 4343 | ber 0001fffe | unc 00000000 |
status 00 | signal 4d4d | snr 9292 | ber 0001fffe | unc 00000000 |
status 0d | signal 4f4f | snr f3f3 | ber 000013aa | unc 00000038 |
status 1f | signal 4f4f | snr fcfc | ber 000014be | unc 00000036 |
FE_HAS_LOCK
status 1f | signal 4f4f | snr fefe | ber 00001506 | unc 00000000 |
FE_HAS_LOCK
status 1f | signal 4d4d | snr fefe | ber 00001342 | unc 00000000 |
FE_HAS_LOCK
status 1f | signal 4d4d | snr fefe | ber 00001436 | unc 00000000 |
FE_HAS_LOCK
status 1f | signal 4d4d | snr fefe | ber 000015c6 | unc 00000000 |
FE_HAS_LOCK
status 1f | signal 4d4d | snr fefe | ber 00001c7a | unc 00000000 |
FE_HAS_LOCK

[root at recorder ~]# i2cdetect
Error: No i2c-bus specified!
Syntax: i2cdetect [-y] [-a] [-q|-r] I2CBUS [FIRST LAST]
        i2cdetect -F I2CBUS
        i2cdetect -l
        i2cdetect -V
  I2CBUS is an integer
  With -a, probe all addresses (NOT RECOMMENDED)
  With -q, uses only quick write commands for probing (NOT RECOMMENDED)
  With -r, uses only read byte commands for probing (NOT RECOMMENDED)
  If provided, FIRST and LAST limit the probing range.
  With -l, lists installed busses only
Error: No I2C busses found!
Be sure you have done 'modprobe i2c-dev'
and also modprobed your i2c bus drivers
[root at recorder ~]# modprobe i2c-dev
[root at recorder ~]# i2cdetect
Error: No i2c-bus specified!
Syntax: i2cdetect [-y] [-a] [-q|-r] I2CBUS [FIRST LAST]
        i2cdetect -F I2CBUS
        i2cdetect -l
        i2cdetect -V
  I2CBUS is an integer
  With -a, probe all addresses (NOT RECOMMENDED)
  With -q, uses only quick write commands for probing (NOT RECOMMENDED)
  With -r, uses only read byte commands for probing (NOT RECOMMENDED)
  If provided, FIRST and LAST limit the probing range.
  With -l, lists installed busses only
  Installed I2C busses:
    i2c-2       i2c             TerraTec Cinergy 1200 DVB-S
    i2c-1       i2c             Terratec Cinergy 1200 DVB-T
    i2c-0       smbus           SMBus Via Pro adapter at 0500
[root at recorder ~]# date;i2cdetect -y 0;date
Sun Feb 18 09:25:24 CET 2007
     0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f
00:          XX XX XX XX XX XX XX XX XX XX XX XX XX
10: XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX
20: XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX
30: 30 XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX
40: XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX
50: UU XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX
60: XX XX XX XX XX XX XX XX XX 69 XX XX XX XX XX XX
70: XX XX XX XX XX XX XX XX
Sun Feb 18 09:25:25 CET 2007
[root at recorder ~]# date;i2cdetect -y 1;date
Sun Feb 18 09:25:33 CET 2007
     0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f
00:          XX XX XX XX XX 08 XX XX XX XX XX XX XX
10: XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX
20: XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX
30: XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX
40: XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX
50: UU XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX
60: XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX
70: XX XX XX XX XX XX XX XX
Sun Feb 18 09:26:07 CET 2007
[root at recorder ~]# date;i2cdetect -y 2;date
Sun Feb 18 09:26:41 CET 2007
     0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f
00:          XX XX XX XX XX XX XX XX XX XX XX XX XX
10: XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX
20: XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX
30: XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX
40: XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX
50: UU XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX
60: XX XX XX XX XX XX XX XX 68 XX XX XX XX XX XX XX
70: XX XX XX XX XX XX XX XX
Sun Feb 18 09:27:16 CET 2007
[root at recorder ~]# i2cdump -y 2 0x68
No size specified (using byte-data access)
     0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f    0123456789abcdef
00: a1 18 34 2a 8e 0f a2 00 60 00 42 00 f0 81 23 54    ??4*???.`.B.??#T
10: 74 88 f7 88 5c 14 80 03 ff ff 71 03 ef b4 1f 80    t???\???..q?????
20: 00 00 00 ff 4a fc 62 00 01 1e 14 0f 09 05 18 0b    ....J?b.????????
30: 21 1f 19 f8 01 60 00 00 00 00 00 00 00 00 00 00    !????`..........
40: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 a0    ...............?
50: a0 a0 a0 a0 a0 a0 a0 a0 a0 a0 a0 a0 a0 a0 a0 a0    ????????????????
60: a0 a0 a0 a0 a0 a0 a0 a0 a0 a0 a0 a0 a0 a0 a0 a0    ????????????????
70: a0 a0 a0 a0 a0 a0 a0 a0 a0 a0 a0 a0 a0 a0 a0 a0    ????????????????
80: a1 18 34 2a 8e 0f a2 00 60 00 52 00 f0 81 23 54    ??4*???.`.R.??#T
90: 74 88 f7 88 5c 14 80 04 ff ff 79 02 f0 b1 1f 80    t???\???..y?????
a0: 00 00 ff 00 4a fe 52 00 01 1e 14 0f 09 05 18 0b    ....J?R.????????
b0: 21 1f 19 f8 01 60 00 00 00 00 00 00 00 00 00 00    !????`..........
c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 a0    ...............?
d0: a0 a0 a0 a0 a0 a0 a0 a0 a0 a0 a0 a0 a0 a0 a0 a0    ????????????????
e0: a0 a0 a0 a0 a0 a0 a0 a0 a0 a0 a0 a0 a0 a0 a0 a0    ????????????????
f0: a0 a0 a0 a0 a0 a0 a0 a0 a0 a0 a0 a0 a0 a0 a0 a0    ????????????????
[root at recorder ~]# i2cdump -y 1 0x8
No size specified (using byte-data access)
     0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f    0123456789abcdef
00: 46 90 1e 00 00 00 00 01 00 00 00 00 00 00 00 00    F??....?........
10: 00 67 00 00 00 00 a8 a8 00 00 00 00 00 00 07 c0    .g....??......??
20: c0 0a c8 6e 00 00 00 00 00 00 00 00 00 f0 f0 08    ???n.........???
30: 00 00 00 00 00 00 00 38 38 38 80 ff ff 60 67 00    .......888?..`g.
40: 00 dc 20 01 cc 08 12 00 ff 00 ff 4e 17 00 00 1f    .? ????....N?..?
50: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00    ................
60: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00    ................
70: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00    ................
80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00    ................
90: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00    ................
a0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00    ................
b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00    ................
c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00    ................
d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00    ................
e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00    ................
f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00    ................





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