Hi, guys,
I'm back with more questions. I am still trying to get kannel to talk to a
Multi-Tech MTCBA-G-EN-F4 modem that connects via an ethernet port.
If you have good knowledge of the smsc_at driver code I could really use
your help.
I have been hacking away at the smsc_at.c code and have wrapped the code to
detect the modem speed in an
if ( privdata->is_serial ) { ... }
statement so that this won't be attempted because, apparently, you cannot
detect this modems speed.
I thought this would solve my problem but, alas, it did not. I have now
worked my way down into the at2_read_buffer() call and I think that this is
where the problem is occurring. I have placed a few DEBUG log file writes
in locations to show what is happening. I am completely new to
communicating to modems and via raw tcp so I do not know what should be
expected. However, I don't think the at2_read_buffer() call is getting
anything. Below, is a reduced log file for the at device containing what is
written from a startup - shutdown cycle of bearerbox.
The biggest indicators that I see are that privdata->lib = strange
characters and at2_read_line() never finds an end-of-line character. The
at2_read_buffer() call only executes a read the first time for the first AT
command. After that it seems like the state of something is stuck because
the select() call only returns 0 causing the at2_read_buffer() call to
return NULL before the read() is attempted.
If anyone has some insight into this I would greatly appreciate it. I am
using the code in the source download. I have not pulled anything from the
cvs repository.
Thank you very much,
-Tony
log file
1 2008-06-07 12:51:06 [15527] [6] INFO: AT2[vzn00]: opening device
2 2008-06-07 12:51:06 [15527] [6] DEBUG: AT2[vzn00]: device opened
3 2008-06-07 12:51:06 [15527] [6] INFO: AT2[vzn00]: init device
4 2008-06-07 12:51:06 [15527] [6] DEBUG: AT2[vzn00]: --> ATZ^M
5 2008-06-07 12:51:06 [15527] [6] DEBUG: AT2[vzn00]: --> ATZ^M
-response: 4
6 2008-06-07 12:51:06 [15527] [6] DEBUG: in at2_wait_modem_command:
before while cur_time <= end_time
7 2008-06-07 12:51:06 [15527] [6] DEBUG: in at2_read_buffer: after
select, ret: 1
8 2008-06-07 12:51:06 [15527] [6] DEBUG: in at2_read_buffer: before
read, ret: 1
9 2008-06-07 12:51:06 [15527] [6] DEBUG: in at2_read_buffer: after
read, s: 12
10 2008-06-07 12:51:06 [15527] [6] DEBUG: in at2_read_line with
gt_flag=0, gtloc=-1, lib=ÿý^Xÿý ÿý#ÿý'
11 2008-06-07 12:51:06 [15527] [6] DEBUG: in at2_read_line if eol == -1
will return NULL eol: -1
12 2008-06-07 12:51:06 [15527] [6] DEBUG: in at2_read_buffer: after
select, ret: 0
13 2008-06-07 12:51:10 [15527] [6] DEBUG: in at2_read_line with
gt_flag=0, gtloc=-1, lib=ÿý^Xÿý ÿý#ÿý'
14 2008-06-07 12:51:10 [15527] [6] DEBUG: in at2_read_line if eol == -1
will return NULL eol: -1
... 1000's of repetitions of the above 3 lines ...
15 2008-06-07 12:51:10 [15527] [6] DEBUG: in at2_wait_modem_command:
Out of loop: cur_time: 1212864670, end_time: 1212864669
16 2008-06-07 12:51:10 [15527] [6] ERROR: AT2[vzn00]: Wrong or no
answer to ATZ, ignoring
17 2008-06-07 12:51:10 [15527] [6] DEBUG: AT2[vzn00]: --> AT^M
18 2008-06-07 12:51:10 [15527] [6] DEBUG: AT2[vzn00]: --> AT^M
-response: 3
19 2008-06-07 12:51:10 [15527] [6] DEBUG: in at2_wait_modem_command:
before while cur_time <= end_time
20 2008-06-07 12:51:10 [15527] [6] DEBUG: in at2_read_buffer: after
select, ret: 0
21 2008-06-07 12:51:10 [15527] [6] DEBUG: in at2_read_line with
gt_flag=0, gtloc=-1, lib=ÿý^Xÿý ÿý#ÿý'
22 2008-06-07 12:51:10 [15527] [6] DEBUG: in at2_read_line if eol == -1
will return NULL eol: -1
... 1000's of repetitions ...
23 2008-06-07 12:51:10 [15527] [6] DEBUG: in at2_read_buffer: after
select, ret: 0
24 2008-06-07 12:51:14 [15527] [6] DEBUG: in at2_read_line with
gt_flag=0, gtloc=-1, lib=ÿý^Xÿý ÿý#ÿý'
25 2008-06-07 12:51:14 [15527] [6] DEBUG: in at2_read_line if eol == -1
will return NULL eol: -1
26 2008-06-07 12:51:14 [15527] [6] DEBUG: in at2_wait_modem_command:
Out of loop: cur_time: 1212864674, end_time: 1212864673
27 2008-06-07 12:51:14 [15527] [6] ERROR: AT2[vzn00]: Wrong or no
answer to AT. Trying again
28 2008-06-07 12:51:14 [15527] [6] DEBUG: AT2[vzn00]: --> AT^M
29 2008-06-07 12:51:14 [15527] [6] DEBUG: AT2[vzn00]: --> AT^M
-response: 3
30 2008-06-07 12:51:14 [15527] [6] DEBUG: in at2_wait_modem_command:
before while cur_time <= end_time
31 2008-06-07 12:51:14 [15527] [6] DEBUG: in at2_read_buffer: after
select, ret: 0
32 2008-06-07 12:51:14 [15527] [6] DEBUG: in at2_read_line with
gt_flag=0, gtloc=-1, lib=ÿý^Xÿý ÿý#ÿý'
33 2008-06-07 12:51:14 [15527] [6] DEBUG: in at2_read_line if eol == -1
will return NULL eol: -1
... 1000's of repetitions ...
34 2008-06-07 12:51:14 [15527] [6] DEBUG: in at2_read_buffer: after
select, ret: 0
35 2008-06-07 12:51:18 [15527] [6] DEBUG: in at2_read_line with
gt_flag=0, gtloc=-1, lib=ÿý^Xÿý ÿý#ÿý'
36 2008-06-07 12:51:18 [15527] [6] DEBUG: in at2_read_line if eol == -1
will return NULL eol: -1
37 2008-06-07 12:51:18 [15527] [6] DEBUG: in at2_wait_modem_command:
Out of loop: cur_time: 1212864678, end_time: 1212864677
38 2008-06-07 12:51:18 [15527] [6] ERROR: AT2[vzn00]: Second attempt to
send AT failed
39 2008-06-07 12:51:18 [15527] [6] ERROR: AT2[vzn00]: Opening failed.
Terminating
40 2008-06-07 12:51:18 [15527] [6] INFO: AT2[vzn00]: closing device
41 2008-06-07 12:51:18 [15527] [6] INFO: AT2[vzn00]: closing device
42 2008-06-07 12:51:18 [15527] [6] DEBUG: Thread 6
(gw/smsc/smsc_at.c:at2_device_thread) terminates.
