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pdp7/Adafruit_Blinka SPI ports for Beaglebone.md

Last active April 14, 2019 09:57
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Adafruit_Blinka SPI ports for Beaglebone
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Adafruit_Blinka SPI ports for Beaglebone.md

@RobertCNelson thanks for the explanation.

@ladyada thanks, your comment made me realize that I can adjust the indexes in spiPorts inside microcontroller/am335x/pin.py

SPI0 is /dev/spidev1.x and SPI1 is /dev/spidev2.x on both:

I think spiPorts should changed from:

# ordered as spiId, sckId, mosiId, misoId
spiPorts = (
    (0, SPI0_SCLK, SPI0_D1, SPI0_D0),
    (1, SPI1_SCLK, SPI1_D1, SPI1_D0),
)

to:

# ordered as spiId, sckId, mosiId, misoId
spiPorts = (
    (1, SPI0_SCLK, SPI0_D1, SPI0_D0),
    (2, SPI1_SCLK, SPI1_D1, SPI1_D0),
)

By the way, the new BeagleBone AI should hopefully launch this Summer. It uses a much more powerful TI Sitara AM5729 SoC but keeps the traditional P8/P9 BeagleBone headers. @jadonk has been working on BeagleBone cape interface spec so that we can have consistency between the new and old BeagleBones.

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