Rice Lake CW-90X Over/Under/Washdown Checkweigher - Lantronix MatchPort - Manual (Page 74)

Configurable Pins
MatchPort b/g™ User Guide
74
Command 1Ah, Set Active Levels
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 active type for that GPIO will not change.
Bytes 5-8: New Active Levels
Bit X 1 means GPIO X will become active low.
0 means it will become active high.
Response:
1 parameter
Bytes 1-4: Updated active levels
Command 1Bh, Set States
Send:
2 parameters
Bytes 1-4: Mask
Bit X 1 means the state for GPIO X will be updated with the value in the
second parameter.
0 means the state for that GPIO will not change.
Bytes 5-8: New States
Bit X 1 means GPIO X will become active.
0 means it will become inactive.
Response:
1 parameter
Bytes 1-4: Updated states
Examples
Example 1: PC sends command 10h to find out which configurable pins are
available as GPIO.
PC -> MatchPort b/g: 10h, 00h, 00h, 00h, 00h, 00h, 00h, 00h, 00h
MatchPort b/g -> PC: 10h, 03h, 00h, 00h, 00h
Command details:
10h = command 10h
00h, 00h, 00h, 00h = ignored
00h, 00h, 00h, 00h = ignored
Response details:
10h = response to command 10h
03h, 00h, 00h, 00h =
bits 0 and 1 are 1
→CP0 and CP1 are configured as GPIOs (GPIO0, GPIO1).
bits 2 to 7 are 0
→ configured for a special function and are unavailable for
control or monitoring by the user.