LabJack UE9 - Page 72

Command:
Byte
0
Checksum8
1
0xF8
2
0x02
3
0x14
4
Checksum16 (LSB)
5
Checksum16 (MSB)
6
0x00
7
AsynchOptions
Bit 7: Update
Bit 6: UARTEnable
Bit 5: Reserved
8-9
BaudFactor16
Response:
Byte
0
Checksum8
1
0xF8
2
0x02
3
0x14
4
Checksum16 (LSB)
5
Checksum16 (MSB)
6
Errorcode
7
AsynchOptions
8-9
BaudFactor16
AsynchOptions: If Update is true, the new parameters are written (otherwise just a read is done). If UARTEnable is true, the
UART is enabled and the RX line will start buffering any incoming bytes.
BaudFactor16: A 16-bit value that sets the baud rate according the following formula: BaudFactor = 2
16
-3000000/(Desired
Baud). For example, use a BaudFactor of 65224 to get a baud rate of 9615 bps (compatible with 9600 bps).
5.3.18 - AsynchTX
Control command sends bytes to the UE9 UART which will be sent asynchronously on the PIN2 (TX0) pin on the DB37 connector.
Command:
Byte
0
Checksum8
1
0xF8
2
1 + NumAsynchWords
3
0x15
4
Checksum16 (LSB)
5
Checksum16 (MSB)
6
0x00
7
NumAsynchBytesToSend
8
AsynchByte0
...
...
Response:
Byte
0
Checksum8
1
0xF8
2
0x02
3
0x15
4
Checksum16 (LSB)
5
Checksum16 (MSB)
6
Errorcode
7
NumAsynchBytesSent
8
NumAsynchBytesInRXBuffer
9
0x00
NumAsynchWords: This is the number of asynch data bytes divided by 2. If the number of bytes is odd, round up and add
an extra zero to the packet.
NumAsynchBytesToSend: Specifies how many bytes will be sent (0-246).
NumAsynchBytesInRXBuffer: Returns how many bytes are currently in the RX buffer.
5.3.19 - AsynchRX
Control command reads the oldest 32 bytes from the UE9 UART RX buffer. The buffer holds 256 bytes.
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