Hello Kathy Chang,
thank you for your effort. Can you provide a patch for the sc16is7x2.c file?
Regards,
Manuel Stahl
On 20.12.2010 10:01, changgx wrote:
> hello,Manuel Stahl:
>
> Sc16is7x2 driver has been successfully debugged.
>
> In sc16is7x2.c，the control to the var .cs_change does not match with at91sam9260 driver.
>
> 1、
> In function sc16is7x2_startup(),the spi chip select maintains low level after the setence cmds = sc16is7x2_alloc_spi_cmds(8).
> It caused a error about next SPI operation.
>
> Improved method is to use 8 sc16is7x2_write_async() function to set sc16is7x2 reg.
>
> 2、
>
> In sc16is7x2_msg_add_fifo_tx() function， you need to take anti-cs_change variables.
>
>
> good luck!!!
>
>
> ======= 2010-12-14 11:52:00 您在来信中写道：=======
>
>> Hello again,
>>
>> The commands in sc16is7x2_spi_async are sent async (as the name says),
>> so the first time you execute sc16is7x2_read(ts->spi, UART_IER,ch) the
>> async part was not yet completed, the second time it was completed and
>> has set UART_IER to 0.
>>
>> Regards,
>> Manuel
>>
>> On 13.12.2010 06:43, changgx wrote:
>>> hello，manuel.stahl：
>>>
>>> excuse me!!
>>>
>>> I found the sc16is7x2.c driver provided by you on the internet the
>>> other day. And I explante it to my board.
>>>
>>> My develop environment is about ：CPU for AT91SAM9260 and kennel for
>>> linux-2.6.27.
>>>
>>> But I found some questions in debugging.
>>>
>>> In the function of sc16is7x2_startup( ), i add the sentence to read
>>> register value after sc16is7x2_spi_async(ts->spi, cmds, 8) sentence
>>> and i find that the return value is always 0xff.
>>>
>>> for example:
>>>
>>> int uier1,uier2;
>>>
>>> uier1 = sc16is7x2_read(ts->spi, UART_IER,ch);
>>> SC16_PRINTK("+++++++++++++++++++++> s ：d UART_IER = x
>>> \n",__func__,__LINE__,uier1);
>>> uier2 = sc16is7x2_read(ts->spi, UART_IER,ch);
>>> SC16_PRINTK("+++++++++++++++++++++> s ：d UART_IER = x
>>> \n",__func__,__LINE__,uier2);
>>>
>>> the print result:
>>>
>>> +++++++++++++++++++++> sc16is7x2_startup : 512 UART_IER = ff
>>> +++++++++++++++++++++> sc16is7x2_startup : 515 UART_IER = 0
>>>
>>> The results is that the first time is 0xff, the secend is 0.
>>>
>>> And it is same to read other register.
>>>
>>> please give me some advice for this question.
>>>
>>> ps: thank you very much for your open souce and look forward to your
>>> email.
>>>
>>> thanks！
>>>
>>> kathy chang
>>>
>>> 2010-12-13
>>>
>>> ------------------------------------------------
>>>
>>> Email：changgx@xxxxxxx<mailto:changgx@xxxxxxx>
>>>
>>> ------------------------------------------------
>>>
>>>
>>>
>>> = = = = = = = = = = = = = = = = = = = =
>>> 致
>>> 礼！
>>> changgx
>>> changgx@xxxxxxx<mailto:changgx@xxxxxxx>
>>> 2010-12-13
>>>
>>
>>
>> --
>> Manuel Stahl
>> Fraunhofer-Institut IIS
>> Leistungsoptimierte Systeme
>>
>> Nordostpark 93
>> D90411 Nürnberg
>> Telefon +49 (0)911/58061-6419
>> Fax +49 (0)911/58061-6398
>> E-Mail manuel.stahl@xxxxxxxxxxxxxxxxx
>>
>> http://www.iis.fraunhofer.de
>> http://www.smart-power.fraunhofer.de
>>
>>
>>
>> __________ Information from ESET Smart Security, version of virus signature database 5563 (20101026) __________
>>
>> The message was checked by ESET Smart Security.
>>
>> http://www.eset.com
>
> = = = = = = = = = = = = = = = = = = = =
>
>
> 致
> 礼！
>
>
> changgx
> changgx@xxxxxxx
> 2010-12-20
>
>
>
>
--
Manuel Stahl
Fraunhofer-Institut IIS
Leistungsoptimierte Systeme
Nordostpark 93
D90411 Nürnberg
Telefon +49 (0)911/58061-6419
Fax +49 (0)911/58061-6398
E-Mail manuel.stahl@xxxxxxxxxxxxxxxxx
http://www.iis.fraunhofer.de
http://www.smart-power.fraunhofer.de
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