User programmable protocol: Communication Control Block
Since this was written we have introduced Hash commands. The Open_Serial
hash command make this much simpler to do.
User programmable protocol is selected and configured via a suitable Communications Control Block (CCB). The following table summarizes the various parameters in the CCB. Entries are hyper-linked to detailed descriptions. If you are using a User programmable protocol you must set up a CCB with the specified parameters and then invoke it in your program with a ComSetCCB
instruction.
Byte | Function | Example value |
---|---|---|
0 | 3 | 3 |
1 | Not used - set to 255 | |
2 | 0 (8,1,N) | |
3 | 5 (9600) | |
4 | Not used - set to 255 | |
5 | Not used - set to 255 | |
6 | Not used - set to 255 | |
7 | Not used - set to 255 | |
8 | Not used - set to 255 | |
9 | Not used - set to 255 | |
10 | Not used - set to 255 | |
11 | Not used - set to 255 | |
12 | Not used - set to 255 | |
13 | Not used - set to 255 | |
14 | Not used - set to 255 | |
15 | Not used - set to 255 | |
16 | Not used - set to 255 | |
17 | Not used - set to 255 | |
18 | Not used - set to 255 | |
19 | Not used - set to 255 |
Note there are a lot of unused settings! It is safest to set them all to 255 in case we ever invoke any of them in future Firmware revisions.