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APPENDIX C. BINARY TELECOMMUNICATIONS

C-7

TABLE C.4-2. Example Program Listing

From

Command 1

MODE 1

SCAN RATE 5

1:P17

1:1

2:P86

1:10

3:P70

1:1

2:1

4:P0

MODE 2

SCAN RATE 0

MODE 3

1:P0

MODE 10

1:28

2:64

3:0

4:5332

5:1971

MODE 12

1:0

2:0

MODE 11

1:6597

2:30351

3:48

4:0

5:0

^E ^E

LOAD PROGRAM FROM ASCII FILE

Command 2 sets up the CR23X to load a

program which is input as serial ASCII data in the

same form as sent in response to command 1.

A download file need not follow exactly the

same format that is used when listing a program

(i.e., some of the characters sent in the listing

are not really used when a program is loaded).

Some rules which must be followed are:

1. "M" must be the first character other than a

carriage return, line feed, semicolon, or 7D

Hex. The "M" serves the same function as

"∗" does from the keyboard. The order in

which the Modes are sent in does not

matter (i.e., the information for Mode 3

could be sent before that for Mode 1).

2. "S" is necessary prior to the Scan Rate

(execution interval).

3. The colons (:) are used to mark the start of

actual data.

4. A semicolon (;) tells the CR23X to ignore

the rest of the line and can be used after an

entry so that a comment can be added.

There are 4 two-character control codes which

may be used to verify that the CR23X receives

a file correctly:

^B ^B (2hex, 2hex)--Discard current buffer

and reset signature

^C ^C (3hex, 3hex)--Send signature for

current buffer

^D ^D (4hex, 4hex)--Load current buffer and

reset signature

^E ^E (5hex, 5hex)--Load current buffer, Exit

and compile program

As a download file is received, the CR23X

buffers the data in memory; the data is not

loaded into the editor or compiled until the

CR23X receives a command to do so. The

maximum size of the buffer is 1.5K. The

minimum file that could be sent is the program

listing, then ^E ^E. ^C ^C tells the CR23X to

send the signature (Appendix C.3) for the

current buffer of data. If this signature does not

match that calculated by the sending device, ^B

^B can be sent to discard the current buffer and

reset the signature. If the signature is correct,

^D ^D can be sent to tell the CR23X to load the

buffer into the editor and reset the signature.

Once the complete file has been sent and

verified, send ^E ^E to compile the program and

exit the load command.

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