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TM8100/TM8200 Computer-Controlled Data Interface (CCDI) Protocol Manual
CCDI
19
© Tait Electronics Limited
April 2007
In Command mode, the PC sends command sequences to the radio and
waits for a prompt before beginning the next transaction. Some commands
require the radio to send a CCDI message in response. Messages sent to the
radio will always be responded to by the prompt.
Unsolicited messages such as PROGRESS or ERROR messages are sent by
the radio if there is a significant change in its state that the PC should be
aware of. When errors are detected, an unsolicited ERROR message is sent
by the radio to the PC. The radio cannot send messages that require a reply.
The SEND_SDM, SEND_ADAPTABLE_SDM and GET_SDM
commands require that SDMs are sent and received as over-the-air FFSK
data by the radio while in Command mode. If an SDM is received from the
over-air interface while the radio is in Command mode, the SDM data is
buffered and a ‘SDM Received’ RING messages are generated by the radio
to indicate that SDM data has been received. When using FFSK, an ‘FFSK
Data Received’ PROGRESS message will also be generated.
1.8.1
Entering Command Mode
Command mode can be set as the default mode at power on by selecting
‘Command Mode’ in the ‘Powerup State’ field in the programming
application. Refer to
.
To change to Command mode while operating in Transparent mode, you
can:
■
send the escape sequence consisting of a 2 second idle time, followed by
three escape characters (sent within 2 seconds), followed by a further 2
second idle time.
Example: If the escape character is “+” (default), send
[2 second idle] +++ [2 second idle].
■
exit via the I/O line programmed for THSD, if Transparent Mode was
entered using this line.
1.8.2
CCDI Command Prompt
After entering Command mode, the radio sends a “.” character to the PC
which is displayed as a command prompt. The command prompt indicates
that the radio is ready for another command. The prompt is also sent after
the radio has sent a message.
Note
In early CCDI versions, the command prompt after messages was
not sent for all messages.