summaryrefslogtreecommitdiff
path: root/i2c/trekstor_ebr30_a/README
blob: b4e96a83b25251e8b78c01f04ef818d9037476e9 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
-------------------------------------------------------------------------------
TrekStor eBook Reader 3.0 I2C
-------------------------------------------------------------------------------

This is a set of example captures of the I2C traffic on a TrekStor eBook
Reader 3.0 EBR30-a (Weltbild + Hugendubel Edition) device.

For details on the device see:

  http://randomprojects.org/wiki/TrekStor_eBook_Reader_3.0_EBR30-a_(Weltbild_%2B_Hugendubel_Edition)

There are three chips which are connected to the main CPU's SCL/SDA pins:

 - Battery management chip: X-Powers AXP199

 - RTC chip: Hec Semiconductor H8563S

 - Digital Thermal Orientation Sensor (DTOS): MEMSIC MXC6225XU


trekstor_ebr30_a_i2c_0x15.sr
----------------------------

The logic analyzer used was a ChronoVu LA8 (at 4MHz):

  Probe       I2C pin
  -------------------
  1 (orange)  SCL
  7 (yellow)  SDA

The sigrok command line used was:

  sigrok-cli -d 0:samplerate=4mhz --samples 8388608 \
             -p '2=SCL,8=SDA' -o trekstor_ebr30_a_i2c_0x15.sr


trekstor_ebr30_a_i2c_30s.sr and trekstor_ebr30_a_i2c_120s.sr
------------------------------------------------------------

This is a 30s/120s dump of the I2C traffic while the device was attached
to USB.

The logic analyzer used was a Saleae Logic (at 4MHz):

  Probe       I2C pin
  -------------------
  4 (orange)  SCL
  6 (green)   SDA

The sigrok command line used was:

  sigrok-cli -d 0:samplerate=4mhz --time <time>
             -p '4=SCL,6=SDA' -o <filename.sr>

(<time> was 30s or 120s)