blue PiraT Mini
User Guide
Datum: 21.09.2016
Seite 36 von 56
blue_PiraT_Mini_UserManual_V2.4.1.doc
11.3 Serial (RS232)
Channels
up to 5
Data bits
5, 6, 7, 8
Stop bits
1, 2, 1.5
Parity
None, odd, even
Table 11.3: Serial interface
The blue PiraT Mini supports only the RS232 specification.
11.3.1
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.
11.3.2
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.
11.4 FlexRay
The blue PiraT Mini 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 three
FlexRay channels, including
“a” and “b”, independently if the FlexRay bus is in a synchronous or
asynchronous state.
Table 11.4: FlexRay
Attention:
For every measurement with FlexRay the line must be separated and lead through the
blue PiraT Mini. Therefore all connectors exist two times at the cable set.
Turning off the blue PiraT Mini thereby causes no interruption of the FlexRay line.
Channels
3x (a + b)
Max. bit rate
10 Mbit/s
Frames
Static, Dynamic, Null Sync, Startup
Transceiver
AS8221
