Rice Lake CW-90X Over/Under/Washdown Checkweigher - Lantronix MatchPort - Manual (Page 75)

Configurable Pins
MatchPort b/g™ User Guide
75
Example 2: PC sends command 1Bh to change the current states of GPIO 0
and 1 (assuming they are configured as outputs).
PC -> MatchPort b/g: 1Bh, 03h, 00h, 00h, 00h, 01h, 00h, 00h, 00h
MatchPort b/g -> PC: 1Bh, 01h, 00h, 00h, 00h
Command details:
1Bh = command 1Bh
03h, 00h, 00h, 00h = the mask that determines which GPIOs will be changed
bit 0 and 1 are 1
→ GPIO0 and GPIO1 will be changed
01h, 00h, 00h, 00h = the new states
bit 0 is 1
→ GPIO0 will become 1
bit 1 is 0
→ GPIO1 will become 0
Response details:
1Bh = response to command 1Bh
01h, 00h, 00h, 00h =
bit 0 is 1
→ GPIO0 = 1
bit 1 is 0
→ GPIO1 = 0