The application daemon speaks twi over the serial line (/dev/cuaU0)
Everything works perfectly.
Thanks, Axel
Am 27.04.22 um 23:08 schrieb Axel Rau:
Next journey starts:
For the home2l project, I need a supported I2C interface via USB.
I got this one:
https://de.elv.com/elv-usb-ic-interface-usb-i2c-092255?fs=1805459039
Unfortunately it shows up as a serial device on FreeBSD:
ugen0.2: <Silicon Labs ELV USB-I2C-Interface> at usbus0, cfg=0 md=HOST
spd=FULL (12Mbps) pwr=ON (500mA)
bLength = 0x0012
bDescriptorType = 0x0001
bcdUSB = 0x0110
bDeviceClass = 0x0000 <Probed by interface class>
bDeviceSubClass = 0x0000
bDeviceProtocol = 0x0000
bMaxPacketSize0 = 0x0040
idVendor = 0x10c4
idProduct = 0xea60
bcdDevice = 0x0100
iManufacturer = 0x0001 <Silicon Labs>
iProduct = 0x0002 <ELV USB-I2C-Interface>
iSerialNumber = 0x0003 <B5AAP0EEUK6A3CIZ>
bNumConfigurations = 0x0001
In loader.conf, I have:
uslcom_load="YES"
iic_load="YES"
iicbus_loa
But the i2c utility does not show a new bus.
From dmesg:
root@axels-bsdbox:~ # dmesg | grep iic
ig4iic0: <Intel Sunrise Point-H I2C Controller-0> mem
0xdf230000-0xdf230fff irq 16 at device 21.0 on pci0
ig4iic0: Using MSI
iicbus0: <Philips I2C bus (ACPI-hinted)> on ig4iic0
iic0: <I2C generic I/O> on iicbus0
ig4iic1: <Intel Sunrise Point-H I2C Controller-1> mem
0xdf22f000-0xdf22ffff irq 17 at device 21.1 on pci0
ig4iic1: Using MSI
iicbus1: <Philips I2C bus (ACPI-hinted)> on ig4iic1
iic1: <I2C generic I/O> on iicbus1
root@axels-bsdbox:~ # dmesg | grep I2C
ig4iic0: <Intel Sunrise Point-H I2C Controller-0> mem
0xdf230000-0xdf230fff irq 16 at device 21.0 on pci0
iicbus0: <Philips I2C bus (ACPI-hinted)> on ig4iic0
iic0: <I2C generic I/O> on iicbus0
ig4iic1: <Intel Sunrise Point-H I2C Controller-1> mem
0xdf22f000-0xdf22ffff irq 17 at device 21.1 on pci0
iicbus1: <Philips I2C bus (ACPI-hinted)> on ig4iic1
iic1: <I2C generic I/O> on iicbus1
ugen0.2: <Silicon Labs ELV USB-I2C-Interface> at usbus0
uslcom0: <ELV USB-I2C-Interface> on usbus0
They provide a (linux) driver ("Treiber") which seems to implement the
I2C protocoll on top of the serial interface.
Do we have such a driver on FreeBSD, or exist other supported I2C
devices to be plugged into USB?
Any help appreciated,
Axel
--
PGP-Key: CDE74120 ☀ computing @ chaos claudius
