blue PiraT2 / 5E / 5E
User Guide
Datum: 21.09.2016
Seite 40 von 71
blue_PiraT2_UserManual_V2.4.1.doc
10.3 Serial (RS232)
Channels
6x RS232
Data bits
5, 6, 7, 8
Stop bits
1, 2, 1.5
Parity
None, odd, even
Table 10.3: Serial interface
The blue PiraT2 supports only the RS232 specification.
10.3.1
Segmentation of the serial data
The received serial data are clustered into data blocks separately for each channel. Each block
is finalized after a certain time or when it reaches a certain maximum size. The time is 30 to 60
ms depending on the channel. The maximum size is 49 to 80 bytes. A time stamp is assigned to
each block when it is finalized.
10.3.2
RS232 transceiver
The threshold voltages for data reception are the usual RS232-defined values. A logical
“1” is
recognized for input voltages smaller 0 Volts, a logical
“0” for input voltages higher than 3 Volts.
10.4 FlexRay
The blue PiraT2 is able to record FlexRay bus data according to the FlexRay specification 2.1A.
The data logger records all valid and invalid, static and dynamic frames of the two FlexRay
channels, including
“a” and “b”, independently if the FlexRay bus is in a synchronous or asyn-
chronous state.
Channels
2x (a + b)
Max. bit rate
10 Mbit/s
Frames
Static, Dynamic, Null Sync, Startup
Transceiver
AS8221
Table 10.4: FlexRay
