47
Serial Bus Analysis
the respective BUS (B1 or B2).
Depending on the installed option use the soft menu key
BUS TYPE to choose from the following BUS types:
❙
PARALLEL
(Standard)
❙
PARALLEL CLOCKED
(Standard)
❙
SSPI
(only available with R&S®HOO10/HV110/HOO11/HV111)
❙
SPI
(only available with R&S®HOO10/HV110/HOO11/HV111)
❙
I
2
C
(only available with R&S®HOO10/HV110/HOO11/HV111)
❙
UART
(only available with R&S®HOO10/HV110/HOO11/HV111)
❙
CAN
(only available with R&S®HOO12/HV112)
❙
LIN
(only available with R&S®HOO12/HV112)
The soft menu key CONFIGURATION allows you to invoke
a menu corresponding to the selected bus type. A menu
description can be found in the chapters of the respective
BUS configuration. The soft menu DISPLAY SETUP is iden
-
tical for all buses and allows you to select the decoding
format. You may choose from the following formats:
❙
Binary
❙
Hexadecimal
❙
Decimal
❙
ASCII
Use the soft menu key BITS to activate or deactivate the
display of individual bit lines (above the table display). The
last entry NAME in the VERTICAL menu opens a submenu
which allows you to enter a BUS name. This name will be
displayed on the
grid and the printout. Your first option is
to switch the display on (ON) or off (OFF). The next option
includes the menu item LIBRARY. After selecting this
option, you can use the universal knob to choose a name
from several suggestions. The EDIT LABEL key allows
you to enter a completely new name or to customize the
suggested name. You may enter up to 8 characters. Use
the ACCEPT key to confirm the name in the editor. It will
then be shown in the display. The name is assigned to that
specific signal.
13 .2 .1 BUS Table
The soft menu BUS TABLE allows you to configure / ex
-
port a list of all decoded messages in storage. The table
content is protocol specific and the table display can be
activated for each individual BUS type. The top soft menu
Fig. 13.1:
Menu for the definition of buses
key BUS TABLE allows you to activate or deactivate the list
view (blue highlighted). By default, the table is displayed at
the bottom of the screen. Generally, a complete message
of a protocol is displayed in a row. The columns include
important information, e.g. address and date of the mes-
sage. The number of rows in the table is identical to the
number of complete message frames in storage. The de-
coding results may be saved as CSV file by using the soft
menu key SAVE (e.g. save to a USB stick).
Example of a I
2
C BUS table:
“Bus table: BUS1 (I2C: Clock SCL = D0, Dates SDA = D1)“
Frame,Mark,Start time[s],Type,ID,Length,Date,Condition
1,,-197.89200e-6,Read,0x2D,5,0xF110E55D31,OK
2,,28.00000e-9,Write,0x42,8,0xEB8DC599AE5D6FC0,OK
3,,217.74000e-6,Write,0x3B,6,0xA113B7263E5B,OK
4,,376.07200e-6,Read,0x0E,6,0x55C3EB71D9E8,OK
5,,613.58000e-6,Write,0x66,8,0x91B86EE6655E2300,Data Error
The soft menu key TRACK FRAME allows you to scroll
through the BUS table and simultaneously jump to the
corresponding position in the memory via universal knob
to display details on the screen. However, this is only pos-
sible if acquisition has been stopped. This option is also
available in the short menu BUS via soft menu key TRK
(= Track). If you activate the soft menu key FRAME TIME
DIFFERENCE (highlighted in blue), the time difference to
the previous frame (data packet) will be displayed in the
BUS table. This column will be labeled in the table as TIME
DIFF. If this function is deactivated, the absolute time in
relation to the trigger point will be displayed in the column
START TIME. The soft menu key TAB in the BUS short
menu allows you to activate or deactivate the BUS table
without opening a menu. You can use the soft menu item
POSITION to move the table to the top or bottom of the
screen. In addition, it is possible to display the BUS table
in full screen. Select the position via universal knob in the
Fig. 13.2: Example I
2
C BUS with BUS table
Make sure that a complete message of a serial protocol is always
displayed on the screen to ensure decoding can function properly.
The Zoom function allows you to view details for any specific
message.
A BUS table can only be stored if the STOP mode is active.