Flachmann und Heggelbacher Docklight V2.2, User Manual

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Docklight V2.2 User Manual 07/2016 Copyright 2016 Flachmann und Heggelbacher GbR
Working with Docklight (Advanced)
Preconditions
·
Docklight is ready to run a test as described in testing a serial device or a protocol
implementation .
·
Flow Control Support is set to "Manual" in the project settings .
·
The Docklight project already contains one or several Send Sequences , but there is
an additional requirement for changing RTS / DTR signals while sending.
Implementing RTS/DTR signal changes
For our example we assume that we are using a RS485 converter which requires RS485
Transceiver Control , but uses the DTR signal instead of RTS for switching between
"transmit" and "receive" mode. We further assume there is already a "Test" Send
Sequence which looks like this in ASCII mode:
T | e | s | t
A) Modifying the existing Send Sequence
1. Open the Edit Send Sequence dialog .
2. Switch the Edit Mode to Decimal . Our "Test" example looks like this in decimal
mode:
084 | 101 | 115 | 116
3. Insert an RTS/DTR function character at the beginning: Press F11 , or open the
context menu using the right mouse button and choose Function character
'!' (RTS and DTR signals) . The example sequence now reads:
! | 084 | 101 | 115 | 116
4. Add the new RTS/DTR state as a decimal parameter value (see below). In our
example we need the DTR signal set to high. We choose "002" as the parameter
value, so the sequence is now:
! | 002 | 084 | 101 | 115 | 116
5. Add a RTS/DTR function character at the end of the sequence, and use "000" as
parameter value to reset the DTR signal low. The sequence data is now:
! | 002 | 084 | 101 | 115 | 116 | ! | 000
6. Click OK to confirm the changes
NOTE: To distinguish a '!' RTS/DTR function character from a exclamation mark ASCII
character (decimal code 33), the RTS/DTR function character is shown on a different
background color by the sequence editor.
NOTE: The character after a RTS/DTR function character is used to set the RTS / DTR
signals and is not sent to the serial device (see parameter values below).
B) Sending the data with additional DTR control
1. Send the test sequence using the Send button.
Docklight will now set the DTR signal to high, send the ASCII sequence "Test" and then
reset DTR.
NOTE: The RTS/DTR indicators will indicate any changes of the RTS or DTR state.
However, in the above example the DTR is set and reset very quickly, so the DTR
indicator will probably not give any visual feedback. If you want to actually "see" the DTR
behavior, try introducing a small
inter-character delay .