nanopi/allwinner i2c not working.

Daniel Braniss danny at cs.huji.ac.il
Wed Oct 7 09:08:35 UTC 2020


grr I hate spell checkers

> On 7 Oct 2020, at 12:06, Daniel Braniss <danny at cs.huji.ac.il> wrote:
> 
> 
> 
>> On 7 Oct 2020, at 11:59, Andriy Gapon <avg at FreeBSD.org> wrote:
>> 
>> On 07/10/2020 11:33, Andriy Gapon wrote:
>>> Perhaps the problem is on the device's side?
>> 
>>> From here https://www.nxp.com/docs/en/user-guide/141520.pdf
>> § 6.2.4
>> However, it may happen that the PN532 does not acknowledge its own address
>> immediately after having finished a previous exchange.
>> 
>> So, perhaps an application level delay is needed?
>> I am not really familiar with the device and its communication protocol details,
>> so maybe I am talking nonsense.
> there is some black magic involved here :-)
> i’ll try putting someday, and some other stuff.
s/someday/some delay/

> btw, I have a dtsoto enable the 2nd. 2c but now Isee that the ‘official’ one is different,
> can you priced me with a correct one?
> and is there a way to lower the i2c speed?
> 
> thanks,
> 	and it’s back to the drawing board for me.
> 
> danny
> 
>> 
>> -- 
>> Andriy Gapon
> 
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