Matrix Orbital GLK12232-25, Техническое руководство, Страница: 25 / 41

Command Summary 25
6.6 General Purpose Output
6.1 General Purpose
Output On
Dec
Hex
ASCII 254 87
FE 57
■
W
Number
Number
Number v5.8
Turns the specified GPO on, sourcing current from an output of five volts.
Number Byte GPO to be turned on.
6.2 General Purpose
Output Off
Dec
Hex
ASCII 254 86
FE 56
■
V
Number
Number
Number v5.8
Turns the specified GPO off, sinking current to an output of zero volts.
Number Byte GPO to be turned off.
6.3 Set Start Up
GPO State
Dec
Hex
ASCII 254 195
FE C3
■ ├
Number State
Number State
Number State v5.8
Sets and saves the start-up state of the specified GPO in non-volatile memory. Changes will be seen on start up.
Number Byte GPO to be controlled.
State Byte 1 for on or 0 for off.
6.7 Keypad
7.1 Auto Transmit
Key Presses On
Dec
Hex
ASCII 254 65
FE 41
■
A
v5.8
Key presses are automatically sent to the host when received by the display. Use this mode for I2C transactions.
7.2 Auto Transmit
Key Presses Off
Dec
Hex
ASCII 254 79
FE 4F
■
O
v5.8
Key presses are held in the 10 key buffer to be polled by the host using the Poll Key Press command. Default is
Auto Transmit on.
7.3 Poll Key
Press
Dec
Hex
ASCII 254 38
FE 26
■
&
v5.8
Reads the last unread key press from the 10 key display buffer. If another key is stored in the buffer the MSb will
be 1, the MSb will be 0 when the last key press is read. If there are no stored key presses a value of 0 will be
returned. Auto transmit key presses must be turned off for this command to be successful, do not use with I
2
C.
Response Byte Value of key pressed (MSb determines additional keys to be read).