[RESOLVED] Re: Accessing I2C-Bus via ELV USB-I2C
- In reply to: Axel Rau : "Accessing I2C-Bus via ELV USB-I2C"
- Go to: [ bottom of page ] [ top of archives ] [ this month ]
Date: Wed, 27 Apr 2022 22:47:06 UTC
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