Specifications

M7 GX Technical Manual 35 Raveon Technologies Corp.
TRIGBITS x This command enables or disables individual bits for use as input
triggers. If a bit is designated a Trigger Bit, then its state is latched
until it is transmitted.
TRIGPOL x Sets the polarity of the input trigger bit. 0=active high, 1=inverted,
active low. Setting TRIGPOL 0 will mean all trigger bits are active
high, and their state will be latched as a high (1) if the bit ever
goes high.
TRIGEX x Sets which bits are used to report on exception. Exception
reporting is when a position/status report is generated when an
input changes either low-to-high or high-to-low. A Trigger Bit that
is set to trigger by exception with the TRIGEX command will
report 0 if it does not change, or 1 if it changed since the last time
the M7 reported position.
The xx parameter is the hex binary representation of the bits. Refer to the
following table to see the value for x.
IN 2
(TXD)
IN 1
(RTS)
IN 0
(DTR)
Hexadecimal
Representation
0
0
0
0
0
0
1
1
0
1
0
2
0
1
1
3
1
0
0
4
1
0
1
5
1
1
0
6
1
1
1
7
For example, to enable bits 0 and 2 (DTR and TxD pins) to be used as digital input,
issue the following commend:
TRIGBITS 5
If the bits are to be normally active high, then the polarity must be set to 0
(TRIGPOL 0 command). To set bit 0 so that it is inverted (active low), use the
following command:
TRIGPOL 1
This will cause the unit to transmit when bit 0 (DTR pin) is low.
To enable exception reporting, that is transmit when a pin changes from low-to-
high or high-to-low, use the TRIGEX command. When TRIGEX is 0, all inputs are
active either high or low. When a bit is set to 1 in TRIGEX, then that bit will cause
the unit to transmit position/status anytime it changes state. The M7 will report the
bit as a 1 if it changes state, or 0 if it did not change state.
For example, to configure the unit to transmit position when bit 0 changes state,
issue these commands: