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User programmable protocol: Communication Control Block

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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

CharProfile

0 (8,1,N)
3

BaudRate

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.