11:48 p.m.
Hello ofono guys,
I've got a embedded device with SIM5216E modem. Based on the previous
work done by my colleague Jean-Christian de Rivaz (you can see previous
talk on this mailing list about this modem "Some experiments with the
SIMCOM SIM5216E modem on a ARM926 board"), the simcom AT doc, my
MacGyver kit and my resourcefulness, i do a patch for ofono to support
this modem (and maybe others models).
I attach the patch to this email.
While making this patch, I wondered about that :
* After entering a pin code, ofono goes too fast and checks too
early the sim pin status with "CPIN?". The ME responds "CME Error : 14
(SIM busy)" and ofono stops here. Ofono doesn't send more CPIN? or
intercept the "+CPIN: READY" that the modem send after a while when SIM
is back online. So, I use the same workaround that for ZTE : sending
severals AT+CPIN? commands during 20 seconds until having "+CPIN:
READY". It works well but as my modem sends the "+CPIN: READY" from its
own, I think I can use another mechanism more "standard" in ofono, isn't
it ?
* I want to save power when i doesn't need the modem. So, i guess it
is the purpose of the "org.ofono.Modem.SetProperty" dbus method and the
setting "Powered". When I set "Powered" to "False", I see
ofono calls
the "disable" callback of "struct ofono_modem_driver", so I think its
here I must write the famous CFUN command(s) to put modem down. In the
AT doc for SIMCOM, I have severals CFUN values for, i think, disable
purpose :
0 – minimum functionality
4 – disable phone both transmit and receive RF circuits
7 – Offline Mode
For now, i do a CFUN=4 but maybe i need to do more and add CFUN=7 ? Or
maybe use CFUN=0 ?
Can the "disable" callback be called by ofono in other case and so, i
must only do a CFUN=4 ?
* I would like to do a reset of the modem at start and at end of
ofono life (with AT+CFUN=6 or AT+CRESET). The purpose is having a modem
always in init state for ofono and the others programs. Do you think its
a good idea ?
Best regards,
Anthony Viallard.
3:21 a.m.
Hi Anthony,
On 01/24/2013 06:48 AM, Viallard Anthony wrote:
Hello ofono guys,
I've got a embedded device with SIM5216E modem. Based on the previous
work done by my colleague Jean-Christian de Rivaz (you can see previous
talk on this mailing list about this modem "Some experiments with the
SIMCOM SIM5216E modem on a ARM926 board"), the simcom AT doc, my
MacGyver kit and my resourcefulness, i do a patch for ofono to support
this modem (and maybe others models).
How closely related is this one to SIMCOM 900? We already do have a
plugin for it in the tree, so it might be a good idea to merge the two
if they are closely related.
I attach the patch to this email.
Please use git send-email to send patches.
While making this patch, I wondered about that :
* After entering a pin code, ofono goes too fast and checks too early
the sim pin status with "CPIN?". The ME responds "CME Error : 14 (SIM
busy)" and ofono stops here. Ofono doesn't send more CPIN? or intercept
the "+CPIN: READY" that the modem send after a while when SIM is back
online. So, I use the same workaround that for ZTE : sending severals
AT+CPIN? commands during 20 seconds until having "+CPIN: READY". It
works well but as my modem sends the "+CPIN: READY" from its own, I
think I can use another mechanism more "standard" in ofono, isn't it ?
oFono core expects the sim atom driver to return from PIN entry function
when the SIM initialization procedures have been completed. Many modems
have an unsolicited notification that is fired when this is done, to
avoid CPIN? polling. Are you saying your modem fires off a 'CPIN:
READY' as an unsolicited notification? If so, then you can follow the
same type of mechanism as VENDOR_IFX or VENDOR_STE
* I want to save power when i doesn't need the modem. So, i guess
it is
the purpose of the "org.ofono.Modem.SetProperty" dbus method and the
setting "Powered". When I set "Powered" to "False", I see
ofono calls
the "disable" callback of "struct ofono_modem_driver", so I think
its
here I must write the famous CFUN command(s) to put modem down. In the
AT doc for SIMCOM, I have severals CFUN values for, i think, disable
purpose :
0 – minimum functionality
4 – disable phone both transmit and receive RF circuits
7 – Offline Mode
oFono expects the following:
Powered = True, Online = True -> Full functionality
Powered = True, Online = False -> RX/TX circuits down, SIM Card reader
enabled
Powered = False -> Everything is powered down.
For now, i do a CFUN=4 but maybe i need to do more and add CFUN=7 ? Or
maybe use CFUN=0 ?
You would need to find out what exactly those modes do.
Can the "disable" callback be called by ofono in other case
and so, i
must only do a CFUN=4 ?
disable is performed when the modem is powered down, either by normal
means or when oFono daemon shuts down.
* I would like to do a reset of the modem at start and at end of
ofono
life (with AT+CFUN=6 or AT+CRESET). The purpose is having a modem always
in init state for ofono and the others programs. Do you think its a good
idea ?
In general that is not desirable. The modem should be initialized when
the enable driver method is called. Why do you want to do this?
Regards,
-Denis
4:13 a.m.
On 24. 01. 13 17:21, Denis Kenzior wrote:
How closely related is this one to SIMCOM 900? We already do have a
plugin for it in the tree, so it might be a good idea to merge the two
if they are closely related.
I don't known if SIM900 works with my driver plugin. SIMCOM were not
given us this information whereas we inquired them. It will be glad if
someone check it.
The only main difference i see between the two plugins, it's the
AT+CSCS="GSM" command. I don't exactly why there is this command. Maybe
its a behavior need it to work correctly with the operator where the guy
has wrote the code and done the test. If someone tell me how to check
(with an AT command ?) if we need this command, I will do the job.
In the SIMCOM doc, I see this about AT+CSCS :
- “IRA” : International reference alphabet.
- “GSM” : GSM default alphabet; this setting causes easily software
flow control (XON /XOFF) problems.
- “UCS2” 16-bit universal multiple-octet coded character set; UCS2
character strings are converted to hexadecimal numbers from 0000 to FFFF.
Please use git send-email to send patches.
ok.
oFono core expects the sim atom driver to return from PIN entry
function
when the SIM initialization procedures have been completed. Many modems
have an unsolicited notification that is fired when this is done, to
avoid CPIN? polling. Are you saying your modem fires off a 'CPIN: READY'
as an unsolicited notification? If so, then you can follow the same type
of mechanism as VENDOR_IFX or VENDOR_STE
Right. My modem fires off a 'CPIN: READY' as an unsolicited
notification. I will check the VENDOR_IFX or VENDOR_STE mechanism.
> * I would like to do a reset of the modem at start and at end of
ofono
> life (with AT+CFUN=6 or AT+CRESET). The purpose is having a modem always
> in init state for ofono and the others programs. Do you think its a good
> idea ?
>
In general that is not desirable. The modem should be initialized when
the enable driver method is called. Why do you want to do this?
I guessed it will be nicer to have this but if you say no, ok, it was
just an idea to have always a chips in same state at start and when
ofono stops.
Thanks,
avd.
5:21 a.m.
Hi Anthony,
On 01/24/2013 11:13 AM, Viallard Anthony wrote:
On 24. 01. 13 17:21, Denis Kenzior wrote:
> How closely related is this one to SIMCOM 900? We already do have a
> plugin for it in the tree, so it might be a good idea to merge the two
> if they are closely related.
I don't known if SIM900 works with my driver plugin. SIMCOM were not
given us this information whereas we inquired them. It will be glad if
someone check it.
The only main difference i see between the two plugins, it's the
AT+CSCS="GSM" command. I don't exactly why there is this command. Maybe
its a behavior need it to work correctly with the operator where the guy
has wrote the code and done the test. If someone tell me how to check
(with an AT command ?) if we need this command, I will do the job.
If this is the only difference then the two plugins should be merged.
Any minor variations can be taken care of by checking the model /
firmware versions.
The CSCS command is used to set the character set. It is mostly used to
make sure basic strings from the modem will be in a format we recognize
(e.g. phone numbers, operator names, etc). This setting should
generally be safe.
>> * I would like to do a reset of the modem at start and at end
of ofono
>> life (with AT+CFUN=6 or AT+CRESET). The purpose is having a modem always
>> in init state for ofono and the others programs. Do you think its a good
>> idea ?
>>
>
> In general that is not desirable. The modem should be initialized when
> the enable driver method is called. Why do you want to do this?
I guessed it will be nicer to have this but if you say no, ok, it was
just an idea to have always a chips in same state at start and when
ofono stops.
The chip should be powered down in disable(), so in theory it will be in
the same state prior to oFono starting. Maybe I'm mis-understanding
what you're trying to do.
Regards,
-Denis
8:01 p.m.
Hi Denis,
2013/1/24 Denis Kenzior
Hi Anthony,
On 01/24/2013 11:13 AM, Viallard Anthony wrote:
> On 24. 01. 13 17:21, Denis Kenzior wrote:
>
> How closely related is this one to SIMCOM 900? We already do have a
>> plugin for it in the tree, so it might be a good idea to merge the two
>> if they are closely related.
>>
>
In near time I'll begin rework plugin for SIM900 . I'll want replace
external cmux with the internal oFono gatmux, and add GPRS. But I think
merge is possible. Only one question is actual to me - we use voice calls
in SIM900, and during merge this functionality must be saved.
> I don't known if SIM900 works with my driver plugin. SIMCOM were not
> given us this information whereas we inquired them. It will be glad if
> someone check it.
>
Ok, I can check your plugin with SIM900 in near time.
> The only main difference i see between the two plugins, it's the
> AT+CSCS="GSM" command. I don't exactly why there is this command.
Maybe
> its a behavior need it to work correctly with the operator where the guy
> has wrote the code and done the test. If someone tell me how to check
> (with an AT command ?) if we need this command, I will do the job.
>
>
If this is the only difference then the two plugins should be merged. Any
minor variations can be taken care of by checking the model / firmware
versions.
The CSCS command is used to set the character set. It is mostly used to
make sure basic strings from the modem will be in a format we recognize
(e.g. phone numbers, operator names, etc). This setting should generally
be safe.
From SIM900 AT command manual:
"The SIM900 AT Command
interface defaults to the IRA character set.", so we
use AT+CSCS="GSM" for compatibility with settings of our provider.
* I would like to do a reset of the modem at start and at end of
ofono
>>> life (with AT+CFUN=6 or AT+CRESET). The purpose is having a modem always
>>> in init state for ofono and the others programs. Do you think its a good
>>> idea ?
>>>
>>>
>> In general that is not desirable. The modem should be initialized when
>> the enable driver method is called. Why do you want to do this?
>>
>
> I guessed it will be nicer to have this but if you say no, ok, it was
> just an idea to have always a chips in same state at start and when
> ofono stops.
>
>
The chip should be powered down in disable(), so in theory it will be in
the same state prior to oFono starting. Maybe I'm mis-understanding what
you're trying to do.
Regards,
-Denis
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Best regards,
Renat Zaripov
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4 comments
3 participants
participants (3)
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Denis Kenzior -
Renat Zaripov -
Viallard Anthony