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Lantronix 900-332 User Manual

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Configurable Pins 
6-4  
WiPort™ 
User 
Guide 
 
Bytes 1-4: The updated directions 
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 -> WiPort: 10h, 00h, 00h, 00h, 00h, 00h, 00h, 00h, 00h 
WiPort -> PC: 10h, 03h, 00h, 02h, 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, 02h, 00h  = 
bits 0, 1, and 9 are 0 
→CP0, CP1, and CP9 are configured as GPIOs (i.e. 
GPIO0, GPIO1, GPIO9).