|
Hi there Bas,
"0x7E, omitted for successive PPP
packets"
for the frame END character. So to me it looks as
if it's not the leading frame character but the trailing one that's missing,
which is specification compliant. Makes sense too to omit it because the inner
structure of a frame past the sync char allows for full parsing of a well formed
packet (of course taking into account the negotiated PFC and AFC compression
restrictions). Note that the first LCP packet (decoded here) is still fully
framed:
ff03 c021 1
1
=> LCP conf
request
0
14
=> length
2 6 0 0 0 0
=>
5 6 40 b1 9c e9 => magic
number
7 2
=> Protocol field
compression
8 2
=> AFC compression
38
b7
=>
=> frame checksum
Afterwards, both sides have all the information
they need to parse a peer's frame without a trailing framing
character.
----- Original Message -----
Sent: Monday, June 07, 2021 7:00 PM
Subject: Re: [lwip-users] pppos sent
packets optionally start with 0x7e, why?
I think the CSV attachment was dropped by server. Trying to add the CSV
as plain text below.
Async Serial == RX
Async Serial [1] == TX
Leading 0x7E byte is not provided by LWIP in when it calls
sio_write.
| name |
type |
start_time |
duration |
data |
|
| Async Serial [1] |
data |
5.80629 |
8.25E-05 |
0x41 |
|
| Async Serial [1] |
data |
5.806378 |
8.25E-05 |
0x54 |
|
| Async Serial [1] |
data |
5.806466 |
8.25E-05 |
0x0D |
|
| Async Serial [1] |
data |
6.936377 |
8.25E-05 |
0x2B |
|
| Async Serial [1] |
data |
6.946236 |
8.25E-05 |
0x2B |
|
| Async Serial [1] |
data |
6.95636 |
8.25E-05 |
0x2B |
|
| Async Serial |
data |
7.865252 |
8.25E-05 |
0x0D |
|
| Async Serial |
data |
7.865339 |
8.25E-05 |
0x0A |
|
| Async Serial |
data |
7.865426 |
8.25E-05 |
0x4F |
|
| Async Serial |
data |
7.865513 |
8.25E-05 |
0x4B |
|
| Async Serial |
data |
7.865599 |
8.25E-05 |
0x0D |
|
| Async Serial |
data |
7.865686 |
8.25E-05 |
0x0A |
|
| Async Serial [1] |
data |
7.869666 |
8.25E-05 |
0x41 |
|
| Async Serial [1] |
data |
7.869754 |
8.25E-05 |
0x54 |
|
| Async Serial [1] |
data |
7.869842 |
8.25E-05 |
0x4F |
|
| Async Serial [1] |
data |
7.86993 |
8.25E-05 |
0x0D |
|
| Async Serial |
data |
7.871056 |
8.25E-05 |
0x0D |
|
| Async Serial |
data |
7.871143 |
8.25E-05 |
0x0A |
|
| Async Serial |
data |
7.87123 |
8.25E-05 |
0x43 |
|
| Async Serial |
data |
7.871317 |
8.25E-05 |
0x4F |
|
| Async Serial |
data |
7.871403 |
8.25E-05 |
0x4E |
|
| Async Serial |
data |
7.87149 |
8.25E-05 |
0x4E |
|
| Async Serial |
data |
7.871577 |
8.25E-05 |
0x45 |
|
| Async Serial |
data |
7.871664 |
8.25E-05 |
0x43 |
|
| Async Serial |
data |
7.871751 |
8.25E-05 |
0x54 |
|
| Async Serial |
data |
7.871837 |
8.25E-05 |
0x20 |
|
| Async Serial |
data |
7.871924 |
8.25E-05 |
0x31 |
|
| Async Serial |
data |
7.872011 |
8.25E-05 |
0x31 |
|
| Async Serial |
data |
7.872098 |
8.25E-05 |
0x35 |
|
| Async Serial |
data |
7.872185 |
8.25E-05 |
0x32 |
|
| Async Serial |
data |
7.872271 |
8.25E-05 |
0x30 |
|
| Async Serial |
data |
7.872358 |
8.25E-05 |
0x30 |
|
| Async Serial |
data |
7.872445 |
8.25E-05 |
0x0D |
|
| Async Serial |
data |
7.872532 |
8.25E-05 |
0x0A |
up
until here is AT commands to put modem in ppp. That succeeded
here. |
| Async Serial [1] |
data |
7.895673 |
8.25E-05 |
0x7E |
First
packet sent over uart from STM |
| Async Serial [1] |
data |
7.895761 |
8.25E-05 |
0xFF |
|
| Async Serial [1] |
data |
7.895849 |
8.25E-05 |
0x7D |
|
| Async Serial [1] |
data |
7.895937 |
8.25E-05 |
0x23 |
|
| Async Serial [1] |
data |
7.896025 |
8.25E-05 |
0xC0 |
|
| Async Serial [1] |
data |
7.896113 |
8.25E-05 |
0x21 |
|
| Async Serial [1] |
data |
7.896201 |
8.25E-05 |
0x7D |
|
| Async Serial [1] |
data |
7.896289 |
8.25E-05 |
0x21 |
|
| Async Serial [1] |
data |
7.896377 |
8.25E-05 |
0x7D |
|
| Async Serial [1] |
data |
7.896465 |
8.25E-05 |
0x21 |
|
| Async Serial [1] |
data |
7.896553 |
8.25E-05 |
0x7D |
|
| Async Serial [1] |
data |
7.896641 |
8.25E-05 |
0x20 |
|
| Async Serial [1] |
data |
7.896729 |
8.25E-05 |
0x7D |
|
| Async Serial [1] |
data |
7.896817 |
8.25E-05 |
0x34 |
|
| Async Serial [1] |
data |
7.896905 |
8.25E-05 |
0x7D |
|
| Async Serial [1] |
data |
7.896993 |
8.25E-05 |
0x22 |
|
| Async Serial [1] |
data |
7.897081 |
8.25E-05 |
0x7D |
|
| Async Serial [1] |
data |
7.897169 |
8.25E-05 |
0x26 |
|
| Async Serial [1] |
data |
7.897257 |
8.25E-05 |
0x7D |
|
| Async Serial [1] |
data |
7.897345 |
8.25E-05 |
0x20 |
|
| Async Serial [1] |
data |
7.897433 |
8.25E-05 |
0x7D |
|
| Async Serial [1] |
data |
7.897521 |
8.25E-05 |
0x20 |
|
| Async Serial [1] |
data |
7.897609 |
8.25E-05 |
0x7D |
|
| Async Serial [1] |
data |
7.897697 |
8.25E-05 |
0x20 |
|
| Async Serial [1] |
data |
7.897785 |
8.25E-05 |
0x7D |
|
| Async Serial [1] |
data |
7.897872 |
8.25E-05 |
0x20 |
|
| Async Serial [1] |
data |
7.89796 |
8.25E-05 |
0x7D |
|
| Async Serial [1] |
data |
7.898048 |
8.25E-05 |
0x25 |
|
| Async Serial [1] |
data |
7.898136 |
8.25E-05 |
0x7D |
|
| Async Serial [1] |
data |
7.898224 |
8.25E-05 |
0x26 |
|
| Async Serial [1] |
data |
7.898312 |
8.25E-05 |
0x40 |
|
| Async Serial [1] |
data |
7.8984 |
8.25E-05 |
0xB1 |
|
| Async Serial [1] |
data |
7.898488 |
8.25E-05 |
0x9C |
|
| Async Serial [1] |
data |
7.898576 |
8.25E-05 |
0xE9 |
|
| Async Serial [1] |
data |
7.898664 |
8.25E-05 |
0x7D |
|
| Async Serial [1] |
data |
7.898752 |
8.25E-05 |
0x27 |
|
| Async Serial [1] |
data |
7.89884 |
8.25E-05 |
0x7D |
|
| Async Serial [1] |
data |
7.898928 |
8.25E-05 |
0x22 |
|
| Async Serial [1] |
data |
7.899017 |
8.25E-05 |
0x7D |
|
| Async Serial [1] |
data |
7.899105 |
8.25E-05 |
0x28 |
|
| Async Serial [1] |
data |
7.899193 |
8.25E-05 |
0x7D |
|
| Async Serial [1] |
data |
7.899281 |
8.25E-05 |
0x22 |
|
| Async Serial [1] |
data |
7.899369 |
8.25E-05 |
0x38 |
|
| Async Serial [1] |
data |
7.899457 |
8.25E-05 |
0xB7 |
|
| Async Serial [1] |
data |
7.899545 |
8.25E-05 |
0x7E |
end
first packet |
| Async Serial |
data |
7.900403 |
8.25E-05 |
0x7E |
first
received ppp packet on rx line |
| Async Serial |
data |
7.90049 |
8.25E-05 |
0xFF |
|
| Async Serial |
data |
7.900576 |
8.25E-05 |
0x7D |
|
| Async Serial |
data |
7.900663 |
8.25E-05 |
0x23 |
|
| Async Serial |
data |
7.90075 |
8.25E-05 |
0xC0 |
|
| Async Serial |
data |
7.900837 |
8.25E-05 |
0x21 |
|
| Async Serial |
data |
7.900924 |
8.25E-05 |
0x7D |
|
| Async Serial |
data |
7.90101 |
8.25E-05 |
0x21 |
|
| Async Serial |
data |
7.901097 |
8.25E-05 |
0xE5 |
|
| Async Serial |
data |
7.901184 |
8.25E-05 |
0x7D |
|
| Async Serial |
data |
7.901271 |
8.25E-05 |
0x20 |
|
| Async Serial |
data |
7.901358 |
8.25E-05 |
0x7D |
|
| Async Serial |
data |
7.901444 |
8.25E-05 |
0x39 |
|
| Async Serial |
data |
7.901531 |
8.25E-05 |
0x7D |
|
| Async Serial |
data |
7.901618 |
8.25E-05 |
0x22 |
|
| Async Serial |
data |
7.901705 |
8.25E-05 |
0x7D |
|
| Async Serial |
data |
7.901792 |
8.25E-05 |
0x26 |
|
| Async Serial |
data |
7.901878 |
8.25E-05 |
0x7D |
|
| Async Serial |
data |
7.901965 |
8.25E-05 |
0x20 |
|
| Async Serial |
data |
7.902052 |
8.25E-05 |
0x7D |
|
| Async Serial |
data |
7.902139 |
8.25E-05 |
0x20 |
|
| Async Serial |
data |
7.902226 |
8.25E-05 |
0x7D |
|
| Async Serial |
data |
7.902312 |
8.25E-05 |
0x20 |
|
| Async Serial |
data |
7.902399 |
8.25E-05 |
0x7D |
|
| Async Serial |
data |
7.902486 |
8.25E-05 |
0x20 |
|
| Async Serial |
data |
7.902573 |
8.25E-05 |
0x7D |
|
| Async Serial |
data |
7.90266 |
8.25E-05 |
0x23 |
|
| Async Serial |
data |
7.902746 |
8.25E-05 |
0x7D |
|
| Async Serial |
data |
7.902833 |
8.25E-05 |
0x25 |
|
| Async Serial |
data |
7.90292 |
8.25E-05 |
0xC2 |
|
| Async Serial |
data |
7.903007 |
8.25E-05 |
0x23 |
|
| Async Serial |
data |
7.903094 |
8.25E-05 |
0x7D |
|
| Async Serial |
data |
7.90318 |
8.25E-05 |
0x25 |
|
| Async Serial |
data |
7.903267 |
8.25E-05 |
0x7D |
|
| Async Serial |
data |
7.903354 |
8.25E-05 |
0x25 |
|
| Async Serial |
data |
7.903441 |
8.25E-05 |
0x7D |
|
| Async Serial |
data |
7.903528 |
8.25E-05 |
0x26 |
|
| Async Serial |
data |
7.903614 |
8.25E-05 |
0x26 |
|
| Async Serial |
data |
7.903701 |
8.25E-05 |
0xA6 |
|
| Async Serial |
data |
7.903788 |
8.25E-05 |
0x32 |
|
| Async Serial |
data |
7.903875 |
8.25E-05 |
0x2F |
|
| Async Serial |
data |
7.903962 |
8.25E-05 |
0x7D |
|
| Async Serial |
data |
7.904049 |
8.25E-05 |
0x27 |
|
| Async Serial |
data |
7.904135 |
8.25E-05 |
0x7D |
|
| Async Serial |
data |
7.904222 |
8.25E-05 |
0x22 |
|
| Async Serial |
data |
7.904309 |
8.25E-05 |
0x7D |
|
| Async Serial |
data |
7.904396 |
8.25E-05 |
0x28 |
|
| Async Serial |
data |
7.904483 |
8.25E-05 |
0x7D |
|
| Async Serial |
data |
7.904569 |
8.25E-05 |
0x22 |
|
| Async Serial |
data |
7.904656 |
8.25E-05 |
0xD7 |
|
| Async Serial |
data |
7.904743 |
8.25E-05 |
0x73 |
|
| Async Serial |
data |
7.90483 |
8.25E-05 |
0x7E |
|
| Async Serial |
data |
7.904917 |
8.25E-05 |
0x7E |
|
| Async Serial |
data |
7.905003 |
8.25E-05 |
0xFF |
|
| Async Serial |
data |
7.90509 |
8.25E-05 |
0x7D |
|
| Async Serial |
data |
7.905177 |
8.25E-05 |
0x23 |
|
| Async Serial |
data |
7.905264 |
8.25E-05 |
0xC0 |
|
| Async Serial |
data |
7.905351 |
8.25E-05 |
0x21 |
|
| Async Serial |
data |
7.905437 |
8.25E-05 |
0x7D |
|
| Async Serial |
data |
7.905524 |
8.25E-05 |
0x22 |
|
| Async Serial |
data |
7.905611 |
8.25E-05 |
0x7D |
|
| Async Serial |
data |
7.905698 |
8.25E-05 |
0x21 |
|
| Async Serial |
data |
7.905785 |
8.25E-05 |
0x7D |
|
| Async Serial |
data |
7.905871 |
8.25E-05 |
0x20 |
|
| Async Serial |
data |
7.905958 |
8.25E-05 |
0x7D |
|
| Async Serial |
data |
7.906045 |
8.25E-05 |
0x34 |
|
| Async Serial |
data |
7.906132 |
8.25E-05 |
0x7D |
|
| Async Serial |
data |
7.906219 |
8.25E-05 |
0x22 |
|
| Async Serial |
data |
7.906305 |
8.25E-05 |
0x7D |
|
| Async Serial |
data |
7.906392 |
8.25E-05 |
0x26 |
|
| Async Serial |
data |
7.906479 |
8.25E-05 |
0x7D |
|
| Async Serial |
data |
7.906566 |
8.25E-05 |
0x20 |
|
| Async Serial |
data |
7.906653 |
8.25E-05 |
0x7D |
|
| Async Serial |
data |
7.906739 |
8.25E-05 |
0x20 |
|
| Async Serial |
data |
7.906826 |
8.25E-05 |
0x7D |
|
| Async Serial |
data |
7.906913 |
8.25E-05 |
0x20 |
|
| Async Serial |
data |
7.907 |
8.25E-05 |
0x7D |
|
| Async Serial |
data |
7.907087 |
8.25E-05 |
0x20 |
|
| Async Serial |
data |
7.907173 |
8.25E-05 |
0x7D |
|
| Async Serial |
data |
7.90726 |
8.25E-05 |
0x25 |
|
| Async Serial |
data |
7.907347 |
8.25E-05 |
0x7D |
|
| Async Serial |
data |
7.907434 |
8.25E-05 |
0x26 |
|
| Async Serial |
data |
7.907521 |
8.25E-05 |
0x40 |
|
| Async Serial |
data |
7.907608 |
8.25E-05 |
0xB1 |
|
| Async Serial |
data |
7.907694 |
8.25E-05 |
0x9C |
|
| Async Serial |
data |
7.907781 |
8.25E-05 |
0xE9 |
|
| Async Serial |
data |
7.907868 |
8.25E-05 |
0x7D |
|
| Async Serial |
data |
7.907955 |
8.25E-05 |
0x27 |
|
| Async Serial |
data |
7.908042 |
8.25E-05 |
0x7D |
|
| Async Serial |
data |
7.908128 |
8.25E-05 |
0x22 |
|
| Async Serial |
data |
7.908215 |
8.25E-05 |
0x7D |
|
| Async Serial |
data |
7.908302 |
8.25E-05 |
0x28 |
|
| Async Serial |
data |
7.908389 |
8.25E-05 |
0x7D |
|
| Async Serial |
data |
7.908476 |
8.25E-05 |
0x22 |
|
| Async Serial |
data |
7.908562 |
8.25E-05 |
0xD3 |
|
| Async Serial |
data |
7.908649 |
8.25E-05 |
0xDE |
|
| Async Serial |
data |
7.908736 |
8.25E-05 |
0x7E |
end
first received ppp packet |
| Async Serial [1] |
data |
7.913322 |
8.25E-05 |
0xFF |
second
ppp packet sent by STM, why is the 0x7E byte ommitted? I also attached
debugger to get data bytes provided by LWIP, first byte is -0xFF |
| Async Serial [1] |
data |
7.91341 |
8.25E-05 |
0x7D |
|
| Async Serial [1] |
data |
7.913498 |
8.25E-05 |
0x23 |
|
| Async Serial [1] |
data |
7.913586 |
8.25E-05 |
0xC0 |
|
| Async Serial [1] |
data |
7.913674 |
8.25E-05 |
0x21 |
|
| Async Serial [1] |
data |
7.913762 |
8.25E-05 |
0x7D |
|
| Async Serial [1] |
data |
7.91385 |
8.25E-05 |
0x24 |
|
| Async Serial [1] |
data |
7.913938 |
8.25E-05 |
0xE5 |
|
| Async Serial [1] |
data |
7.914026 |
8.25E-05 |
0x7D |
|
| Async Serial [1] |
data |
7.914114 |
8.25E-05 |
0x20 |
|
| Async Serial [1] |
data |
7.914202 |
8.25E-05 |
0x7D |
|
| Async Serial [1] |
data |
7.91429 |
8.25E-05 |
0x29 |
|
| Async Serial [1] |
data |
7.914378 |
8.25E-05 |
0x7D |
|
| Async Serial [1] |
data |
7.914466 |
8.25E-05 |
0x23 |
|
| Async Serial [1] |
data |
7.914554 |
8.25E-05 |
0x7D |
|
| Async Serial [1] |
data |
7.914642 |
8.25E-05 |
0x25 |
|
| Async Serial [1] |
data |
7.91473 |
8.25E-05 |
0xC2 |
|
| Async Serial [1] |
data |
7.914818 |
8.25E-05 |
0x23 |
|
| Async Serial [1] |
data |
7.914906 |
8.25E-05 |
0x7D |
|
| Async Serial [1] |
data |
7.914994 |
8.25E-05 |
0x25 |
|
| Async Serial [1] |
data |
7.915082 |
8.25E-05 |
0x7A |
|
| Async Serial [1] |
data |
7.91517 |
8.25E-05 |
0xEF |
|
| Async Serial [1] |
data |
7.915258 |
8.25E-05 |
0x7E |
|
| Async Serial |
data |
7.915929 |
8.25E-05 |
0x7E |
|
| Async Serial |
data |
7.916016 |
8.25E-05 |
0xFF |
|
| Async Serial |
data |
7.916102 |
8.25E-05 |
0x7D |
|
| Async Serial |
data |
7.916189 |
8.25E-05 |
0x23 |
|
| Async Serial |
data |
7.916276 |
8.25E-05 |
0xC0 |
|
| Async Serial |
data |
7.916363 |
8.25E-05 |
0x21 |
|
| Async Serial |
data |
7.91645 |
8.25E-05 |
0x7D |
|
| Async Serial |
data |
7.916536 |
8.25E-05 |
0x21 |
|
| Async Serial |
data |
7.916623 |
8.25E-05 |
0xE6 |
|
| Async Serial |
data |
7.91671 |
8.25E-05 |
0x7D |
|
| Async Serial |
data |
7.916797 |
8.25E-05 |
0x20 |
|
| Async Serial |
data |
7.916884 |
8.25E-05 |
0x7D |
|
| Async Serial |
data |
7.916971 |
8.25E-05 |
0x34 |
|
| Async Serial |
data |
7.917057 |
8.25E-05 |
0x7D |
|
| Async Serial |
data |
7.917144 |
8.25E-05 |
0x22 |
|
| Async Serial |
data |
7.917231 |
8.25E-05 |
0x7D |
|
| Async Serial |
data |
7.917318 |
8.25E-05 |
0x26 |
|
| Async Serial |
data |
7.917405 |
8.25E-05 |
0x7D |
|
| Async Serial |
data |
7.917491 |
8.25E-05 |
0x20 |
|
| Async Serial |
data |
7.917578 |
8.25E-05 |
0x7D |
|
| Async Serial |
data |
7.917665 |
8.25E-05 |
0x20 |
|
| Async Serial |
data |
7.917752 |
8.25E-05 |
0x7D |
|
| Async Serial |
data |
7.917839 |
8.25E-05 |
0x20 |
|
| Async Serial |
data |
7.917925 |
8.25E-05 |
0x7D |
|
| Async Serial |
data |
7.918012 |
8.25E-05 |
0x20 |
|
| Async Serial |
data |
7.918099 |
8.25E-05 |
0x7D |
|
| Async Serial |
data |
7.918186 |
8.25E-05 |
0x25 |
|
| Async Serial |
data |
7.918273 |
8.25E-05 |
0x7D |
|
| Async Serial |
data |
7.918359 |
8.25E-05 |
0x26 |
|
| Async Serial |
data |
7.918446 |
8.25E-05 |
0x26 |
|
| Async Serial |
data |
7.918533 |
8.25E-05 |
0xA6 |
|
| Async Serial |
data |
7.91862 |
8.25E-05 |
0x32 |
|
| Async Serial |
data |
7.918707 |
8.25E-05 |
0x2F |
|
| Async Serial |
data |
7.918793 |
8.25E-05 |
0x7D |
|
| Async Serial |
data |
7.91888 |
8.25E-05 |
0x27 |
|
| Async Serial |
data |
7.918967 |
8.25E-05 |
0x7D |
|
| Async Serial |
data |
7.919054 |
8.25E-05 |
0x22 |
|
| Async Serial |
data |
7.919141 |
8.25E-05 |
0x7D |
|
| Async Serial |
data |
7.919227 |
8.25E-05 |
0x28 |
|
| Async Serial |
data |
7.919314 |
8.25E-05 |
0x7D |
|
| Async Serial |
data |
7.919401 |
8.25E-05 |
0x22 |
|
| Async Serial |
data |
7.919488 |
8.25E-05 |
0x46 |
|
| Async Serial |
data |
7.919575 |
8.25E-05 |
0xDA |
|
| Async Serial |
data |
7.919661 |
8.25E-05 |
0x7E |
|
| Async Serial [1] |
data |
7.9253 |
8.25E-05 |
0xFF |
|
| Async Serial [1] |
data |
7.925388 |
8.25E-05 |
0x7D |
|
| Async Serial [1] |
data |
7.925476 |
8.25E-05 |
0x23 |
|
| Async Serial [1] |
data |
7.925564 |
8.25E-05 |
0xC0 |
|
| Async Serial [1] |
data |
7.925652 |
8.25E-05 |
0x21 |
|
| Async Serial [1] |
data |
7.92574 |
8.25E-05 |
0x7D |
|
| Async Serial [1] |
data |
7.925828 |
8.25E-05 |
0x22 |
|
| Async Serial [1] |
data |
7.925916 |
8.25E-05 |
0xE6 |
|
| Async Serial [1] |
data |
7.926004 |
8.25E-05 |
0x7D |
|
| Async Serial [1] |
data |
7.926092 |
8.25E-05 |
0x20 |
|
| Async Serial [1] |
data |
7.92618 |
8.25E-05 |
0x7D |
|
| Async Serial [1] |
data |
7.926268 |
8.25E-05 |
0x34 |
|
| Async Serial [1] |
data |
7.926356 |
8.25E-05 |
0x7D |
|
| Async Serial [1] |
data |
7.926444 |
8.25E-05 |
0x22 |
|
| Async Serial [1] |
data |
7.926532 |
8.25E-05 |
0x7D |
|
| Async Serial [1] |
data |
7.92662 |
8.25E-05 |
0x26 |
|
| Async Serial [1] |
data |
7.926708 |
8.25E-05 |
0x7D |
|
| Async Serial [1] |
data |
7.926796 |
8.25E-05 |
0x20 |
|
| Async Serial [1] |
data |
7.926884 |
8.25E-05 |
0x7D |
|
| Async Serial [1] |
data |
7.926972 |
8.25E-05 |
0x20 |
|
| Async Serial [1] |
data |
7.92706 |
8.25E-05 |
0x7D |
|
| Async Serial [1] |
data |
7.927149 |
8.25E-05 |
0x20 |
|
| Async Serial [1] |
data |
7.927237 |
8.25E-05 |
0x7D |
|
| Async Serial [1] |
data |
7.927325 |
8.25E-05 |
0x20 |
|
| Async Serial [1] |
data |
7.927413 |
8.25E-05 |
0x7D |
|
| Async Serial [1] |
data |
7.927501 |
8.25E-05 |
0x25 |
|
| Async Serial [1] |
data |
7.927589 |
8.25E-05 |
0x7D |
|
| Async Serial [1] |
data |
7.927677 |
8.25E-05 |
0x26 |
|
| Async Serial [1] |
data |
7.927765 |
8.25E-05 |
0x26 |
|
| Async Serial [1] |
data |
7.927853 |
8.25E-05 |
0xA6 |
|
| Async Serial [1] |
data |
7.927941 |
8.25E-05 |
0x32 |
|
| Async Serial [1] |
data |
7.928029 |
8.25E-05 |
0x2F |
|
| Async Serial [1] |
data |
7.928117 |
8.25E-05 |
0x7D |
|
| Async Serial [1] |
data |
7.928205 |
8.25E-05 |
0x27 |
|
| Async Serial [1] |
data |
7.928293 |
8.25E-05 |
0x7D |
|
| Async Serial [1] |
data |
7.928381 |
8.25E-05 |
0x22 |
|
| Async Serial [1] |
data |
7.928469 |
8.25E-05 |
0x7D |
|
| Async Serial [1] |
data |
7.928557 |
8.25E-05 |
0x28 |
|
| Async Serial [1] |
data |
7.928645 |
8.25E-05 |
0x7D |
|
| Async Serial [1] |
data |
7.928733 |
8.25E-05 |
0x22 |
|
| Async Serial [1] |
data |
7.928821 |
8.25E-05 |
0xAD |
|
| Async Serial [1] |
data |
7.928909 |
8.25E-05 |
0xB3 |
|
| Async Serial [1] |
data |
7.928997 |
8.25E-05 |
0x7E |
|
| Async Serial [1] |
data |
7.929411 |
8.25E-05 |
0xFF |
|
| Async Serial [1] |
data |
7.929499 |
8.25E-05 |
0x03 |
|
| Async Serial [1] |
data |
7.929587 |
8.25E-05 |
0x80 |
|
| Async Serial |
data |
7.929658 |
8.25E-05 |
0x7E |
|
| Async Serial [1] |
data |
7.929675 |
8.25E-05 |
0x21 |
|
| Async Serial |
data |
7.929744 |
8.25E-05 |
0xFF |
|
| Async Serial [1] |
data |
7.929763 |
8.25E-05 |
0x01 |
|
| Async Serial |
data |
7.929831 |
8.25E-05 |
0x7D |
|
| Async Serial [1] |
data |
7.929851 |
8.25E-05 |
0x01 |
|
| Async Serial |
data |
7.929918 |
8.25E-05 |
0x23 |
|
| Async Serial [1] |
data |
7.929939 |
8.25E-05 |
0x00 |
|
| Async Serial |
data |
7.930005 |
8.25E-05 |
0xC0 |
|
| Async Serial [1] |
data |
7.930027 |
8.25E-05 |
0x0A |
|
| Async Serial |
data |
7.930092 |
8.25E-05 |
0x21 |
|
| Async Serial [1] |
data |
7.930115 |
8.25E-05 |
0x03 |
|
| Async Serial |
data |
7.930178 |
8.25E-05 |
0x7D |
|
| Async Serial [1] |
data |
7.930203 |
8.25E-05 |
0x06 |
|
| Async Serial |
data |
7.930265 |
8.25E-05 |
0x2B |
|
| Async Serial [1] |
data |
7.930291 |
8.25E-05 |
0x00 |
|
| Async Serial |
data |
7.930352 |
8.25E-05 |
0xE7 |
|
| Async Serial [1] |
data |
7.930379 |
8.25E-05 |
0x00 |
|
| Async Serial |
data |
7.930439 |
8.25E-05 |
0x7D |
|
| Async Serial [1] |
data |
7.930467 |
8.25E-05 |
0x00 |
|
| Async Serial |
data |
7.930526 |
8.25E-05 |
0x20 |
|
| Async Serial [1] |
data |
7.930555 |
8.25E-05 |
0x00 |
|
| Async Serial |
data |
7.930612 |
8.25E-05 |
0x7D |
|
| Async Serial |
data |
7.930699 |
8.25E-05 |
0x28 |
|
| Async Serial |
data |
7.930786 |
8.25E-05 |
0x26 |
|
| Async Serial |
data |
7.930873 |
8.25E-05 |
0xA6 |
|
| Async Serial |
data |
7.93096 |
8.25E-05 |
0x32 |
|
| Async Serial |
data |
7.931046 |
8.25E-05 |
0x2F |
|
| Async Serial |
data |
7.931133 |
8.25E-05 |
0x74 |
|
| Async Serial |
data |
7.93122 |
8.25E-05 |
0xC1 |
|
| Async Serial |
data |
7.931307 |
8.25E-05 |
0x7E |
|
| Async Serial [1] |
data |
7.931541 |
8.25E-05 |
0x13 |
|
| Async Serial [1] |
data |
7.931629 |
8.25E-05 |
0x28 |
|
| Async Serial [1] |
data |
7.931717 |
8.25E-05 |
0x7E |
|
| Async Serial |
data |
7.93236 |
8.25E-05 |
0x7E |
|
| Async Serial |
data |
7.932447 |
8.25E-05 |
0x80 |
|
| Async Serial |
data |
7.932534 |
8.25E-05 |
0x21 |
|
| Async Serial |
data |
7.93262 |
8.25E-05 |
0x01 |
|
| Async Serial |
data |
7.932707 |
8.25E-05 |
0xFD |
|
| Async Serial |
data |
7.932794 |
8.25E-05 |
0x00 |
|
| Async Serial |
data |
7.932881 |
8.25E-05 |
0x04 |
|
| Async Serial |
data |
7.932968 |
8.25E-05 |
0x2C |
|
| Async Serial |
data |
7.933054 |
8.25E-05 |
0xB0 |
|
| Async Serial |
data |
7.933141 |
8.25E-05 |
0x7E |
|
| Async Serial |
data |
7.933228 |
8.25E-05 |
0x7E |
|
| Async Serial |
data |
7.933315 |
8.25E-05 |
0x80 |
|
| Async Serial |
data |
7.933402 |
8.25E-05 |
0x21 |
|
| Async Serial |
data |
7.933488 |
8.25E-05 |
0x03 |
|
| Async Serial |
data |
7.933575 |
8.25E-05 |
0x01 |
|
| Async Serial |
data |
7.933662 |
8.25E-05 |
0x00 |
|
| Async Serial |
data |
7.933749 |
8.25E-05 |
0x0A |
|
| Async Serial |
data |
7.933836 |
8.25E-05 |
0x03 |
|
| Async Serial |
data |
7.933922 |
8.25E-05 |
0x06 |
|
| Async Serial |
data |
7.934009 |
8.25E-05 |
0x0A |
|
| Async Serial |
data |
7.934096 |
8.25E-05 |
0x81 |
|
| Async Serial |
data |
7.934183 |
8.25E-05 |
0x4B |
|
| Async Serial |
data |
7.93427 |
8.25E-05 |
0x67 |
|
| Async Serial |
data |
7.934356 |
8.25E-05 |
0xCA |
|
| Async Serial |
data |
7.934443 |
8.25E-05 |
0xA1 |
|
| Async Serial |
data |
7.93453 |
8.25E-05 |
0x7E |
|
| Async Serial [1] |
data |
7.939163 |
8.25E-05 |
0xFF |
|
| Async Serial [1] |
data |
7.939251 |
8.25E-05 |
0x03 |
|
| Async Serial [1] |
data |
7.939339 |
8.25E-05 |
0x80 |
|
| Async Serial [1] |
data |
7.939427 |
8.25E-05 |
0x21 |
|
| Async Serial [1] |
data |
7.939515 |
8.25E-05 |
0x03 |
|
| Async Serial [1] |
data |
7.939603 |
8.25E-05 |
0xFD |
|
| Async Serial [1] |
data |
7.939691 |
8.25E-05 |
0x00 |
|
| Async Serial [1] |
data |
7.939779 |
8.25E-05 |
0x0A |
|
| Async Serial [1] |
data |
7.939867 |
8.25E-05 |
0x03 |
|
| Async Serial [1] |
data |
7.939955 |
8.25E-05 |
0x06 |
|
| Async Serial [1] |
data |
7.940043 |
8.25E-05 |
0x00 |
|
| Async Serial [1] |
data |
7.940131 |
8.25E-05 |
0x00 |
|
| Async Serial [1] |
data |
7.940219 |
8.25E-05 |
0x00 |
|
| Async Serial [1] |
data |
7.940307 |
8.25E-05 |
0x00 |
|
| Async Serial [1] |
data |
7.940395 |
8.25E-05 |
0x6B |
|
| Async Serial [1] |
data |
7.940483 |
8.25E-05 |
0x1A |
|
| Async Serial [1] |
data |
7.940571 |
8.25E-05 |
0x7E |
|
| Async Serial [1] |
data |
7.941107 |
8.25E-05 |
0xFF |
|
| Async Serial [1] |
data |
7.941195 |
8.25E-05 |
0x03 |
|
| Async Serial |
data |
7.9412 |
8.25E-05 |
0x7E |
|
| Async Serial [1] |
data |
7.941283 |
8.25E-05 |
0x80 |
|
| Async Serial |
data |
7.941287 |
8.25E-05 |
0x80 |
|
| Async Serial [1] |
data |
7.941371 |
8.25E-05 |
0x21 |
|
| Async Serial |
data |
7.941374 |
8.25E-05 |
0x21 |
|
| Async Serial [1] |
data |
7.94146 |
8.25E-05 |
0x01 |
|
| Async Serial |
data |
7.94146 |
8.25E-05 |
0x01 |
|
| Async Serial |
data |
7.941547 |
8.25E-05 |
0xFE |
|
| Async Serial [1] |
data |
7.941548 |
8.25E-05 |
0x02 |
|
| Async Serial |
data |
7.941634 |
8.25E-05 |
0x00 |
|
| Async Serial [1] |
data |
7.941636 |
8.25E-05 |
0x00 |
|
| Async Serial |
data |
7.941721 |
8.25E-05 |
0x04 |
|
| Async Serial |
data |
7.941808 |
8.25E-05 |
0x48 |
|
| Async Serial |
data |
7.941894 |
8.25E-05 |
0x5F |
|
| Async Serial |
data |
7.941981 |
8.25E-05 |
0x7E |
|
| Async Serial [1] |
data |
7.942683 |
8.25E-05 |
0x0A |
|
| Async Serial [1] |
data |
7.942771 |
8.25E-05 |
0x03 |
|
| Async Serial [1] |
data |
7.942859 |
8.25E-05 |
0x06 |
|
| Async Serial [1] |
data |
7.942947 |
8.25E-05 |
0x0A |
|
| Async Serial [1] |
data |
7.943035 |
8.25E-05 |
0x81 |
|
| Async Serial [1] |
data |
7.943123 |
8.25E-05 |
0x4B |
|
| Async Serial [1] |
data |
7.943211 |
8.25E-05 |
0x67 |
|
| Async Serial [1] |
data |
7.943299 |
8.25E-05 |
0xFD |
|
| Async Serial [1] |
data |
7.943387 |
8.25E-05 |
0xC1 |
|
| Async Serial [1] |
data |
7.943475 |
8.25E-05 |
0x7E |
|
| Async Serial |
data |
7.944092 |
8.25E-05 |
0x7E |
|
| Async Serial |
data |
7.944178 |
8.25E-05 |
0x80 |
|
| Async Serial |
data |
7.944265 |
8.25E-05 |
0x21 |
|
| Async Serial |
data |
7.944352 |
8.25E-05 |
0x02 |
|
| Async Serial |
data |
7.944439 |
8.25E-05 |
0x02 |
|
| Async Serial |
data |
7.944526 |
8.25E-05 |
0x00 |
|
| Async Serial |
data |
7.944612 |
8.25E-05 |
0x0A |
|
| Async Serial |
data |
7.944699 |
8.25E-05 |
0x03 |
|
| Async Serial |
data |
7.944786 |
8.25E-05 |
0x06 |
|
| Async Serial |
data |
7.944873 |
8.25E-05 |
0x0A |
|
| Async Serial |
data |
7.94496 |
8.25E-05 |
0x81 |
|
| Async Serial |
data |
7.945046 |
8.25E-05 |
0x4B |
|
| Async Serial |
data |
7.945133 |
8.25E-05 |
0x67 |
|
| Async Serial |
data |
7.94522 |
8.25E-05 |
0xEA |
|
| Async Serial |
data |
7.945307 |
8.25E-05 |
0x5B |
|
| Async Serial |
data |
7.945394 |
8.25E-05 |
0x7E |
|
| Async Serial [1] |
data |
7.949159 |
8.25E-05 |
0xFF |
|
| Async Serial [1] |
data |
7.949247 |
8.25E-05 |
0x03 |
|
| Async Serial [1] |
data |
7.949335 |
8.25E-05 |
0x80 |
|
| Async Serial [1] |
data |
7.949423 |
8.25E-05 |
0x21 |
|
| Async Serial [1] |
data |
7.949511 |
8.25E-05 |
0x02 |
|
| Async Serial [1] |
data |
7.949599 |
8.25E-05 |
0xFE |
|
| Async Serial [1] |
data |
7.949687 |
8.25E-05 |
0x00 |
|
| Async Serial [1] |
data |
7.949775 |
8.25E-05 |
0x04 |
|
| Async Serial [1] |
data |
7.949863 |
8.25E-05 |
0x3E |
|
| Async Serial [1] |
data |
7.949951 |
8.25E-05 |
0x54 |
|
| Async Serial [1] |
data |
7.950039 |
8.25E-05 |
0x7E |
|
Dear,
I was looking at the data being sent/received over uart when ppp is
being negotiated. I was surprised to see that the received byte stream is
always wrapped in 0x7e bytes (leading + trailing).
But for some reason this is not the case for the bytes lwip sends
(/provides to my sio_write function). Even stronger, sometimes it does start
with a leading 0x7e, sometimes it doesn't.
On the wiki I read:
"PPP packets all start and end with 0x7E. If you don't see these,
something is wrong with your low level driver"
When I look at fsm.c where the PPP header is created, I don't see 0x7e
being added as part of the opening header.
pppos works, lwip works, I can open sockets, download from FTP, etc. So
what's the deal with this? Should I investigate further and is there a bug
sitting in my code? Or is this "perfectly normal" behavior and is the wiki
wrong?
I added the logic analyzer export to this email.
Hopefully someone can shed some light on this.
best regards, bas
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