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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) ] >
}

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