Lantronix XPort User Manual download pdf (Page 47)

5: GPIO Interface

XPort™ User Guide 47

Command 10h, Get Functions

Send:

No parameters

Response:

1 parameter

Bytes 1-4: Functions

Bit X 1 means general purpose I/O available to the user.

0 means dedicated function (e.g., serial flow control, diagnostics) for

configurable pin X.

Command 11h, Get Directions

Send:

No parameters

Response:

1 parameter

Bytes 1-4: Directions

Bit X 1 means GPIO X is an output.

0 means it is an input.

Command 12h, Get Active Levels

Send:

No parameters

Response:

1 parameter

Bytes 1-4: Active levels

Bit X 1 means GPIO X is active low (0V when active, 3.3V when inactive).

0 means it is active high (3.3V when active, 0V when inactive).

Command 13h, Get Current States

Send:

No parameters

Response:

1 parameter

Bytes 1-4: States

Bit X 1 means GPIO X is active

0 means it is inactive.

Command 19h, Set Directions

Send:

2 parameters

Bytes 1-4: Mask

Bit X 1 means the direction for GPIO X will be updated with the value in the

second parameter.

0 means the direction for that GPIO will not change.

Bytes 5-8: New Directions

Bit X 1 means GPIO X will become an output.

0 means it will become an input.

Response:

1 parameter

Bytes 1-4: The updated directions

1 2 ... 42 43 44 45 46 47 48 49 50 51 52 ... 56 57

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Lantronix XPort User Manual Page 47

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