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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