Using the keyboard to enable USB booting

Carlos Camargo cicamargoba at gmail.com
Thu Aug 27 11:51:52 EDT 2009


Hi

I'm testing in my board some resistors, with 1.8k form GND to Bootsel1 and a
pull up 47k resistor the processor can enter to usb mode. So, I think that
the problem is with the GPIO value at reset.




On Thu, Aug 27, 2009 at 10:03 AM, Carlos Camargo <cicamargoba at gmail.com>wrote:

> With the 330 resistor, the CPU enter in USB mode?
>
>
>
>
> On Thu, Aug 27, 2009 at 9:29 AM, Adam Wang <adam at qi-hardware.com> wrote:
>
>> Hi Carlos,
>>
>>>
>>> This board have a Reset S1, What happen when you press  the U key and
>>> push the reset?
>>>
>>>
>>>  Still enter NAND boot mode.
>>
>> Does cpu work on those KEYOUT1~7 and KEYIN1~7 as default "high" status
>> before it starts to run codes to initial those pins, no matter either nand
>> or usb?
>
>
>
> sorry, I don't know
>
>
>>
>> Adam
>>
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>
> Carlos
>
>
>
> --
> Carlos Iván Camargo Bareño
> Profesor Asistente
> Departamento de Ingeniería Eléctrica y Electrónica
> Universidad Nacional de Colombia
> cicamargoba at unal.edu.co
>



-- 
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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