BLUEPIRAT RAPID | USER MANUAL/
page 29 of 67
11
Interfaces
Find a detailed description about the interfaces of the bus systems, supported by the BLUEPI-
RAT Rapid in this chapter.
11.1
First Frame Mode
Some Interfaces from version D3 offer the
First Frame Mode
, which allows logging data before
the
BLUEPIRAT Rapid
has finished it’s booting completely.
This is available for:
CAN
LIN
Serial
FlexRay
11.2
CAN
11.2.1
CAN data with 29 Bit identifiers
The BLUEPIRAT
Mini can also log CAN data with 29 Bit identifiers. You don’t have to configure
anything. All the CAN data will be logged as they are available on the CAN bus. It is also possi-
ble to log CAN messages mixed with
CAN specification 2.0a (11 Bit)
and
CAN specification
2.0b (29 Bit)
identifiers.
11.2.2
Operating modes High Speed / Low Speed / CAN FD
Depending on the model, the BLUEPIRAT Rapid has different numbers of High Speed (HS),
Low Speed (LS) CAN or CAN FD interfaces. It is not possible to change a CAN interface. Each
type is using different transceivers.
The electrical behavior of the Low Speed and the High Speed CAN is different, hence, the Low
Speed CAN port of the device must not be connected to a High Speed CAN bus and vice versa.
Both operating modes use differential signals (CANH, CANL). For the correct data recording, all
nodes of the bus must have a common reference potential. The BLUEPIRAT Rapid uses the
connection “
clamp 31
” as a reference potential. The lines of the High Speed CANs are termi-
nated with a high resistance.
Low Speed-CAN
CAN FD
Transceiver chip
Philips
NXP 1055
NXP
TJA1044GT
Terminating resistor
4k64
4k64
Baud rate
– data channel
50 kbit/s - 125
kbit/s
50kbit/s
– 5Mbit/s
Baud rate
– control channel
-
50kbit/s
– 1Mbit/s
Supported identifiers (SW)
11 & 29 Bit
11 & 29 Bit
Disabling acknowledge
possible
possible
Time stamps
at the end of the
message
at the end of the
message
Table 11.1: Can transceiver