Date: Tue, 17 Jan 2017 19:56:29 -0500 From: George Mitchell <george+freebsd@m5p.com> To: "freebsd-arm@freebsd.org" <freebsd-arm@freebsd.org> Subject: Serial Peripheral Interface? Message-ID: <ef2e151c-2229-161e-16d0-27cd10013298@m5p.com>
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This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --KJdokKKrnQEoefPHkA7BXlaIegeSNxNIE Content-Type: multipart/mixed; boundary="ETkqSBq04l5eHTTxFHsPTvT2iDie0rpNA"; protected-headers="v1" From: George Mitchell <george+freebsd@m5p.com> To: "freebsd-arm@freebsd.org" <freebsd-arm@freebsd.org> Message-ID: <ef2e151c-2229-161e-16d0-27cd10013298@m5p.com> Subject: Serial Peripheral Interface? --ETkqSBq04l5eHTTxFHsPTvT2iDie0rpNA Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable The Raspberry Pi (among others) has two IIC interfaces on the GPIO connector, and there are /dev/iic0 and /dev/iic1 visible to userland. It also has two SPI interfaces, but despite the presence of "device spibus" and "device bcm2835_spi" in the RPI-B configuration file, I have been unable to detect any userland interface to the serial peripheral interface lines (except the dev.spibus and dev.spi sysctl entries). Is it possible to use the SPI interfaces somehow from userland? -- George --ETkqSBq04l5eHTTxFHsPTvT2iDie0rpNA-- --KJdokKKrnQEoefPHkA7BXlaIegeSNxNIE Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- iQIzBAEBCAAdFiEENdM4ZHktsJW5kKZXwRES3m+p4fkFAlh+vUcACgkQwRES3m+p 4fkcQBAAkHt0W+X5HA++hRyo8t3dmiOXfPN5xA5nLPvJdwcoBUM6cXz5qvPFrUKA Ca9HJzyQgP5hAa2IVAYxGYmiZHXPawV0Vm1dkvuNdkMyrmPXPj6sxnKWoH6a/1ct 5M/OuWunoPZ6uk3+0ADgB7f2b3JwSDVTa8vz3W/b5qcUgUA3FSvCocorNGTKamT3 icBf8aT9Y0W2iBgBMuvJcauvdPh/4nZ4JvVuoo3VQZE0V0nmWZeVsBv6d54WdNc8 tnyMR+Q9DnhqI1HqYgUwZqzk+1byYqnW/iW8nnSYIBZupmomchr1yt/A0QxZ2egc tVls0B6ofKvk2IMmQe+ogzt3RdY2CZL/ic9n45k6i8DCjb7QiaPf1MadUt6XaI7U WIbn3d6GIT7L9dqsTCqYH06t3XEyMxACWkpUaXzIKahiMeaxuJnt4KRyLrKwc2vR B/wJ4/5YUdTpWSSf9r2wX6j/gKZF4qbqqQeX7HO8oMvgRbu5RzjrC9su0bIJEFl+ L9hsUpsdT8yDVTrHwHat9BBQGSt9F6NR6lii7zhrq7N9ZwNttuqFowbZ5PVSEdWw 3Tf3oS1IcxCxFIb5/3YjaQHtxmDs+j+3RebdBFDmnbPpYsiAQoPnpVxNBktIwbCt SNCTmnHBKbveH44uozvYQmaxX290Z8cqz99BXUoAN3+ofjOgnEg= =X2dK -----END PGP SIGNATURE----- --KJdokKKrnQEoefPHkA7BXlaIegeSNxNIE--
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