X-Git-Url: https://sigrok.org/gitweb/?a=blobdiff_plain;f=i2c%2Ftrekstor_ebr30_a%2FREADME;h=4b751d8fdd400df9847126cbb0b126e7408abae9;hb=f4298ac310a284590808a47d9e0d33ee449e15c4;hp=91ff5c31872f481f421d47b06a395217499c80b2;hpb=f9eb559c8e87546fee0b672f2f7a5efb9125e17e;p=libsigrokdecode.git diff --git a/i2c/trekstor_ebr30_a/README b/i2c/trekstor_ebr30_a/README index 91ff5c3..4b751d8 100644 --- a/i2c/trekstor_ebr30_a/README +++ b/i2c/trekstor_ebr30_a/README @@ -2,37 +2,55 @@ TrekStor eBook Reader 3.0 I2C ------------------------------------------------------------------------------- -This is an example capture of the I2C traffic on a TrekStor eBook Reader 3.0 -EBR30-a (Weltbild + Hugendubel Edition) device. +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. -So far, it's unknown which device is responsible for which I2C output. +There are three chips which are connected to the main CPU's SCL/SDA pins: + - Battery management chip: X-Powers AXP199 -Logic analyzer setup --------------------- + - RTC chip: Hec Semiconductor H8563S -The logic analyzer used for capturing is a ChronoVu LA8 at a sample rate -of 4MHz. + - Digital Thermal Orientation Sensor (DTOS): MEMSIC MXC6225XU -The ChronoVu LA8 probes were connected to the I2C pins like this: + +trekstor_ebr30_a_i2c_0x15.sr +---------------------------- + +The logic analyzer used for capturing was a ChronoVu LA8: Probe I2C pin ------------------- 1 (orange) SCL 7 (yellow) SDA - GND GND - - -Data ----- 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 for capturing was a Saleae Logic: + + Probe I2C pin + ------------------- + 4 (orange) SCL + 6 (green) SDA + +The sigrok command line used was: + + sigrok-cli -d 0:samplerate=4mhz --time