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4300C User Manual
KEY? QUERY
Returns the decimal number of the key last key processed by the state machine. This
query returns any key in the remote mode even if the key is locked out by remote
mode, i.e. KEY_LOCAL is not locked out.
Syntax:
Response:
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
Usage: Keys are polled every 25ms in a timer interrupt. This routine changes mode to
local and responds with the last key pressed. It can sense keys even in remote mode.
Keys are debounced but are not tested for each menu state.
In other words, sending KEY 4 in a state that does not accept that key will have no effect
to change the state. In addition if the KEY X commands are sent without enough interval
the key handler task will not have executed and the key press can be overwritten by the
next key command and the previous one is skipped. This is due to no buffering of
remote key presses.
KEY?<crlf>
21<crlf>
Decimal Key value between 0-24, 0 = No key pressed
KEY_NO_KEY
KEY_0
KEY_3
KEY_CLEAR
KEY_9
KEY_LOCAL
KEY_RESET
KEY_FUNC
KEY_ENTER
KEY_DP
KEY_RANGE_4
KEY_2
KEY_RANGE_5
KEY_5
KEY_RANGE_6
KEY_8
KEY_6
KEY_NOTUSED
KEY_RANGE_2
6-26
19
20
21
22
23
24
KEY_UPDATE
KEY_HLC
KEY_ADDR
KEY_RUNHOLD
KEY_PRINT
KEY_TCM
KEY_AUTO_RNG
KEY_CAL
KEY_BCD
KEY_VIEW
KEY_DISPLAY
KEY_mk
KEY_1
KEY_RANGE_1
KEY_4
KEY_RANGE_0
KEY_7
KEY_RANGE_3
KEY_1
KEY_2
KEY_3
KEY_4
KEY_5
KEY_6
KEY_7
KEY_8
KEY_9
KEY_0
KEY_1
KEY_DP
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