SD communication protocol

Carlos Camargo cicamargoba at gmail.com
Tue Jun 8 08:37:26 EDT 2010


We are using a custom image kernel based on openwrt Qi sources


Carlos


On Mon, Jun 7, 2010 at 10:36 PM, Xiangfu Liu <xiangfu at sharism.cc> wrote:

> Hi
>
> in office kernel image, the "SDIO UART/GPS class support" is not buildin.
> so are you use the office image?
>
> On Tue, Jun 8, 2010 at 4:33 AM, Camilo Andres Diaz Botia <
> cadiazb at gmail.com> wrote:
>
>> Hi there,
>>
>> I've been working on the SD communication protocol and I managed to
>> initialize a fpga as a SDIO card. Ben nano-note says "mmc0: new SDIO card at
>> address 0001". However when it tries to enable the first function the cmd53
>> with argument 9e000008 fails. I'm telling the Nano I want to use the SDIO as
>> a UART, so the register at address x100 is set as "function supports the
>> SDIO Standard UART". What I want to do is to use the sdio_uart.c to send and
>> receive characters. Any suggestion?
>>
>> Thanks,
>>
>> Camilo
>>
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>
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-- 
Carlos Iván Camargo Bareño
Profesor Asistente
Departamento de Ingeniería Eléctrica y Electrónica
Universidad Nacional de Colombia
cicamargoba at unal.edu.co
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