LabJack U12 - 5.13 - Asynch

Note: Bytes are written down from the starting address. For example, if you write starting at address 0x203, then byte 0 is written
to 0x203, byte 1 is written to 0x202, byte 2 is written to 0x201, and byte 0 is written to 0x200.
Command
Byte #
Description
0
Data Byte 3
1
Data Byte 2
2
Data Byte 1
3
Data Byte 0
4
XXXXXXXX
5
01X1XX01 (Write RAM)
6
Most Significant Address Byte
7
Least Significant Address Byte
Response
Byte #
Description
0
01010001
1
Readback of data byte 3
2
Readback of data byte 2
3
Readback of data byte 1
4
Readback of data byte 0
5
XXXXXXXX
6
Most Significant Address Byte
7
Least Significant Address Byte
Non-Volatile RAM Map
Address Range
Description
0x00
A copy of the serial # which is stored in ROM
0x08 - 0x0A
Always 0
0x0B
LocalID
0x0C
wdoglj (Watchdog Variable)
0x0D
wdogtoh (Watchdog Variable)
0x0E
wdogtol (Watchdog Variable)
0x070
fullA (Asynch Variable)
0x071
fullB (Asynch Variable)
0x072
fullC (Asynch Variable)
0x073
halfA (Asynch Variable)
0x074
halfB (Asynch Variable)
0x075
halfC (Asynch Variable)
0x076
tomult (Asynch Variable)
0x080 - 0x0BF
Serial data send buffer (64 bytes, 28 used)
0x0C0 - 0x0FF
Serial data receive buffer (64 bytes, 28 used)
0x1C0 - 0x1DF
Serial data buffer (32 bytes)
0x200 - 0x3FF
User area
0x400 - 0x1FFF
Circular RAM buffer.
LabJackPython Example
>>> import u12
>>> d = u12.U12()
open called
Writing: [0x0, 0x0, 0x0, 0x0, 0x0, 0x57, 0x0, 0x0]
Received: [0x57, 0x0, 0x0, 0x0, 0xff, 0xff, 0x0, 0x0]
>>> d.rawWriteRAM([1, 2, 3, 4], 0x200)
Writing: [0x4, 0x3, 0x2, 0x1, 0x0, 0x51, 0x2, 0x0]
Received: [0x51, 0x4, 0x3, 0x2, 0x1, 0x0, 0x2, 0x0]
{'DataByte3': 4, 'DataByte2': 3, 'DataByte1': 2, 'DataByte0': 1}
5.13 - Asynch
Sends data asynchronously, then receives data. First four bytes sent or received are passed in this call, and copied to the first 4
bytes of RAM buffer (first 4 bytes of RAM transmit buffer are never used). Any additional bytes must be written/read with the RAM.
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