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| CP2112(4) | FreeBSD Kernel Interfaces Manual | CP2112(4) |
NAME
cp2112 —
SYNOPSIS
To compile this driver into the kernel, place the following lines in your kernel configuration file:device cp2112
device usb
device gpio
device iicbusAlternatively, to load the driver as a module at boot time, place the following line in loader.conf(5):
cp2112_load="YES"
DESCRIPTION
Thecp2112 driver provides support for Silicon Labs
CP2112 device. The device has 8 general purpose I/O pins and an I2C controller
that supports a subset of the I2C protocol.
All pins support both input and output modes. An output pin can be
configured either for open-drain or push-pull operation. Pins 0, 1 and 7
support special functions: I2C transmit indication, I2C receive indication
and clock output respectively. At the moment the
cp2112 driver does not provide a way to enable and
configure the special functions.
The I2C controller supports read transactions with up to 512 bytes
of data, write transactions with up to 61 bytes of data and a write followed
by the repeated start followed by a read transactions where the write can be
up to 16 bytes and the read can be up to 512 bytes. Zero length transfers
are not supported. The cp2112 driver creates a
gpio(4)
and
iicbus(4)
child buses to expose the respective functions.
SEE ALSO
gpio(4), iicbus(4), usb(4)HISTORY
Thecp2112 driver and this manual page was written by
Andriy Gapon
<avg@FreeBSD.org>.
| August 12, 2020 | FreeBSD 13.1-RELEASE |
Visit the GSP FreeBSD Man Page Interface.
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