5.2 - DIO [U12 Datasheet]

This commands reads the direction and state of all the digital I/O. If Update Digital = 1, this function also sets the directions and states before reading.

Table 5.2-1.

Command
Byte #	Description
0	Bits for D15 through D8 Direction ( 0 = Output, 1 = Input)
1	Bits for D7 through D0 Direction ( 0 = Output, 1 = Input)
2	Bits for D15 through D8 State ( 0 = Low, 1 = High)
3	Bits for D7 through 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	01X10111 (DIO)
6	Bits 7-1: XXXXXXX
	Bit 0: Update Digital
7	XXXXXXXX

Response
Byte #	Description
0	01X10111 (DIO Response)
1	Bits for D15 through D8 State ( 0 = Low, 1 = High)
2	Bits for D7 through D0 State ( 0 = Low, 1 = High)
3	Bits 7-4: Bits for IO3 through IO0 State
	Bits 3-0: XXXX
4	Bits for D15 through D8 Direction ( 0 = Output, 1 = Input)
5	Bits for D7 through D0 Direction ( 0 = Output, 1 = Input)
6	Bits for D15 through D8 Output Latch States
7	Bits for D7 through D0 Output Latch States

LabJackPython Example

>>> import u12
>>> d = u12.U12(debug=True)
open called
Writing: [0x0, 0x0, 0x0, 0x0, 0x0, 0x57, 0x0, 0x0]
Received: [0x57, 0x0, 0x0, 0x0, 0xff, 0xff, 0x0, 0x0]
>>> d.rawDIO()
Writing: [0x0, 0x0, 0x0, 0x0, 0x0, 0x57, 0x0, 0x0]
Received: [0x57, 0x0, 0x0, 0x0, 0xff, 0xff, 0x0, 0x0]
{
'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) ] >,
'IO3toIO0States':
<BitField object: [ IO3 = Low (0), IO2 = Low (0),
IO1 = Low (0), IO0 = Low (0) ] >,
'D15toD8Directions':
<BitField object: [ D15 = Input (1), D14 = Input (1),
D13 = Input (1), D12 = Input (1),
D11 = Input (1), D10 = Input (1),
D9 = Input (1), D8 = Input (1) ] >,
'D7toD0OutputLatchStates':
<BitField object: [ D7 = 0 (0), D6 = 0 (0),
D5 = 0 (0), D4 = 0 (0),
D3 = 0 (0), D2 = 0 (0),
D1 = 0 (0), D0 = 0 (0) ] >,
'D15toD8OutputLatchStates':
<BitField object: [ D15 = 0 (0), D14 = 0 (0),
D13 = 0 (0), D12 = 0 (0),
D11 = 0 (0), D10 = 0 (0),
D9 = 0 (0), D8 = 0 (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) ] >,
'D7toD0Directions':
<BitField object: [ D7 = Input (1), D6 = Input (1),
D5 = Input (1), D4 = Input (1),
D3 = Input (1), D2 = Input (1),
D1 = Input (1), D0 = Input (1) ] >
}