Re: I2C/IIC working on RPI4 8GB?

Mark Murray <[email protected]> Wed, 28 Apr 2021 22:07:57 +0100

Newsgroups	gmane.os.freebsd.devel.arm
Message-ID	<[email protected]>

On 28 Apr 2021, at 09:19, Emmanuel Vadot <[email protected]> wrote:
> 
> On Wed, 28 Apr 2021 09:01:56 +0100
> Mark Murray <[email protected] <mailto:[email protected]>> wrote:
>> 
>> I took apart the i2c1.dtbo overlay that mentions pins 2, 3, and swapped them, and reassembled the overlay.
> 
> This suggestion is to use i2c over gpio via iicbb, not the i2c
> controller in the SoC.

Er, right :-). I'll consider that approach if I can't get the BSC to work

> According to this document is this just to detect that the slave hold
> the scl line too long so I don't think that this is the problem here.
> If you have a scope or a logic analyzer I suggest you start by using
> it to confirm that when you scan with i2c -s you see something.

As it turns out, my logic analyser arrived today.

This is a perfect project for it :-)

Thanks!

M
--
Mark R V Murray

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