Re: Fw: about sc16is7x2 drivier

[Manuel Stahl <manuel.stahl@iis.fraunhofer.de>]

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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@163.com<mailto:changgx@163.com>
>>>
>>>      ------------------------------------------------
>>>
>>>
>>>
>>> = = = = = = = = = = = = = = = = = = = =
>>> 　　　　　　　　致
>>> 礼！
>>> changgx
>>> changgx@163.com<mailto:changgx@163.com>
>>> 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@iis.fraunhofer.de
>>
>> http://www.iis.fraunhofer.de
>> http://www.smart-power.fraunhofer.de
>>
>>
>>
>> __________ Information from ESET Smart Security, version of virus signature database 5563 (20101026) __________
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>> The message was checked by ESET Smart Security.
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> 
> = = = = = = = = = = = = = = = = = = = =
> 			
> 
> 　　　　　　　　致
> 礼！
> 
> 				
> 　　　　　　　　changgx
> 　　　　　　　　changgx@163.com
> 　　　　　　　　　　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@iis.fraunhofer.de

http://www.iis.fraunhofer.de
http://www.smart-power.fraunhofer.de

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