Imported from previous forum
I’m trying to encode small test message with only one field. In compact notation template for that message looks like “1u=1”. I’m sending messages for this template: “1=1”, “1=1”, “1=2”. But for 2 first messages encoder doesn’t return enything, because field value doesn’t differ from previous on, and because where are no fields to transfer, presence map is also empty.
How I should encode messages in such situation?
Hi Iyla,
AFAIK FAST hand assembly hasn’t reached the university curriculum yet:
1u=1 means default to value=1, so:
3 one field messages: ‘1=1’, ‘1=1’, ‘1=2’ should encode to:
0x80 0x80 0xc0 0x82
the decoder should parse the following:
msg 1 - pmap 0x80 means default field 1 => 1=1
msg 2 - pmap 0x80 means default field 1 => 1=1
msg 3 - pmap 0xc0 means field 1 present, 0x82 => 0x02 => 1=2
Have a nice weekend,
Rolf
I’m trying to encode small test message with only one field. In compact
notation template for that message looks like “1u=1”. I’m sending
messages for this template: “1=1”, “1=1”, “1=2”. But for 2 first
messages encoder doesn’t return enything, because field value doesn’t
differ from previous on, and because where are no fields to transfer,
presence map is also empty. How I should encode messages in such
situation?
I was a bit to quick hitting the send button.
1u=1 means COPY use default=1 if no previous value.
CN isn’t the default specification language anymore 
/Rolf
Hi Iyla,
AFAIK FAST hand assembly hasn’t reached the university curriculum yet:
1u=1 means default to value=1, so:
3 one field messages: ‘1=1’, ‘1=1’, ‘1=2’ should encode to:
0x80 0x80 0xc0 0x82
the decoder should parse the following:
msg 1 - pmap 0x80 means default field 1 => 1=1
msg 2 - pmap 0x80 means default field 1 => 1=1
msg 3 - pmap 0xc0 means field 1 present, 0x82 => 0x02 => 1=2Have a nice weekend, Rolf
I’m trying to encode small test message with only one field. In
compact notation template for that message looks like “1u=1”. I’m
sending messages for this template: “1=1”, “1=1”, “1=2”. But for 2
first messages encoder doesn’t return enything, because field value
doesn’t differ from previous on, and because where are no fields to
transfer, presence map is also empty. How I should encode messages
in such situation?
I was a bit to quick hitting the send button. 1u=1 means COPY use
default=1 if no previous value.CN isn’t the default specification language anymore
/Rolf
Thanks a lot for a quick answer. I already understood thatpmap should have at least one byte even if there are no fields to transfer.
I’m using compact notation because it’s really… compact and it’s easier and faster to write.