PNI SpacePoint Scout - Manual (Page 8)

PNI Sensor Corporation Doc #1017545 r03
SpacePoint Scout User Manual – January 2013 Page 8 of 19
the orientation of the module, and the horizontal and vertical position for a cursor. See
Section 5 for how to interpret the outputs.
Table 4-1: UART Configuration
Parameter Value
Baud Rate 115200
Data Bits 8
Parity none
Stop Bits 1
Flow Control none
The receive (Rx) and transmit (Tx) data structures and data frames for the UART interface
are shown below in Figure 4-1 and Figure 4-2. All data is presented as unsigned integers in
little Endian format. (For I
2
C communication the format is different, being big Endian.)
Note that the receive command is a single byte frame.
Rx Command Description
kRequestQ 0x32 Request quaternion data from SpacePoint algorithm.
kResetRef 0x34 Reset Reference Frame
Figure 4-1: Receive Data Structure
Frame ID Description
kRequestQResp 0x32 Output SpacePoint quaternion data.
Figure 4-2: Transmit Data Structure
RX Command
(UInt8)