Re: [Gumstix-users] I2C interface as bridge between Aero2Core to Duvero

[Glen W. <gl...@je...>]

Thanks,

These are necessary patches for yocto in on the duovero side?


My EE guesses you have a problem with something like CTS lines on the M4 to duvero serial bridge direction. Have not looked at the schematics or scoped it.

This is a lot more debug work than I wanted to do on a standard product.


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> On Mar 6, 2017, at 8:57 AM, Andrew C. Smith <ac...@gu...> wrote:
> 
> Hi Glen,
> 
> Wow, I'm really sorry about the delay on this.
> 
> I have attached a couple programs.
> 
> spidev_test.c <http://gumstix.8.x6.nabble.com/file/n4971263/spidev_test.c>  
> spi_bridge_m4.cpp
> <http://gumstix.8.x6.nabble.com/file/n4971263/spi_bridge_m4.cpp>  
> 
> spidev_test.c uses the spidev driver on the COM to initiate the transfer and
> send data.
> spi_bridge_m4.cpp is a program that runs on the M4 to receive data and send
> some back.
> 
> In this setup, the M4 is the slave and the COM is the master.  Setting a SPI
> to slave on the M4 requires recompiling your code and making some changes to
> the kernel and some of the SPI config files.  I've added a couple of patches
> here.  I wouldn't suggest applying the patches directly to your tree because
> they're based off an old version of PX4 and NuttX.  Use them to create your
> own patches.  Some stuff may not be necessary, this was just stuff I used
> for testing.
> 
> 0001-Added-SPI-slave-mode-support.patch
> <http://gumstix.8.x6.nabble.com/file/n4971263/0001-Added-SPI-slave-mode-support.patch>  
> 0001-Added-spi_bridge-module-which-will-eventually-ta.patch
> <http://gumstix.8.x6.nabble.com/file/n4971263/0001-Added-spi_bridge-module-which-will-eventually-ta.patch>  
> 
> 
> Hope this helps,
> 
> Andrew
> 
> 
> 
> 
> 
> --
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> 
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