LabJack U12 - 5.5 - AlBurst

Command
Byte #
Description
0
D15 though D8 Direction ( 0 = Output, 1 = Input )
1
Bits for D7 though D0 Direction ( 0 = Output, 1 = Input )
2
Bits for D15 though D8 State ( 0 = Low, 1 = High )
3
Bits for D7 though D0 State ( 0 = Low, 1 = High )
4
Bits 7-4 = Bits for IO3 through IO0 Direction
Bits 3-0 = Bits for IO3 through IO0 State
5
Bits 7-6 = 00 (Counter/AO/DIO)
Bit 5 = Reset Counter
Bit 4 = Update Digital
Bits 3-2 = Least Significant Bits of AO0 duty cycle
Bits 1-0 = Least Significant Bits of AO1 duty cycle
6
Most Significant bits of AO0 duty cycle (0 = 0 V, 0x3ff = 5.0 V)
7
Most Significant bits of AO1 duty cycle (0 = 0 V, 0x3ff = 5.0 V)
Response
Byte #
Description
0
00XXXXXX (counter/pwm response)
1
Bits for D15 though D8 State ( 0 = Low, 1 = High )
2
Bits for D7 though D0 State ( 0 = Low, 1 = High )
3
Bits 7-4 = Bits for IO3 through IO0 State
Bits 3-0 = XXXX
4
Most Significant Byte of Counter
5
Bits 23-16 of Counter
6
Bits 15-8 of Counter
7
Least Significant Byte of Counter
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.rawCounterPWMDIO()
Writing: [0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0]
Received: [0x0, 0x0, 0x0, 0x0, 0xbb, 0x10, 0x0, 0xef]
{
'IO3toIO0States':
<BitField object: [ IO3 = Low (0), IO2 = Low (0),
IO1 = Low (0), IO0 = Low (0) ] >,
'Counter': 3138388207,
'D7toD0States':
<BitField object: [ D7 = Low (0), D6 = Low (0),
D5 = Low (0), D4 = Low (0),
D3 = Low (0), D2 = Low (0),
D1 = Low (0), D0 = Low (0) ] >,
'D15toD8States':
<BitField object: [ D15 = Low (0), D14 = Low (0),
D13 = Low (0), D12 = Low (0),
D11 = Low (0), D10 = Low (0),
D9 = Low (0), D8 = Low (0) ] >
}
5.5 - AIBurst
After receiving a AIBurst command, the LabJack collects 4 channels at the specified data rate, and puts data in the buffer. This
continues until the buffer is full, at which time the LabJack starts sending the data to the host. Data is sent to the host 1 scan at a
time while checking for a command from the host. If a command is received the burst operation is canceled and the command is
executed normally. If the LED is enabled, it blinks at 4 Hz while waiting for a trigger, is off during acquisition, blinks at about 8 Hz
during data delivery, and is set on when done or stopped.
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