MythTV v0.27.5 CEC Support with Pulse-Eight USB-CEC Adapter on CentOS v7.1
Libcec v2.2.0-1 is part of the EPEL repository, libcec v2.2.0-2 is part of the scrpms repository:
# yum install libcec
Add the mythtv user to the 'dialout' group and the 'lock' group so that it can access the CEC device on '/dev/ttyACM0' and create a device lock:
# usermod -a -G dialout mythtv # usermod -a -G lock mythtv
Links
- https://www.pulse-eight.com/p/104/usb-hdmi-cec-adapter
- https://github.com/Pulse-Eight/libcec
- http://libcec.pulse-eight.com/faq
- http://www.cec-o-matic.com/
- http://xtreamerdev.googlecode.com/files/CEC_Specs.pdf
- https://nicegear.co.nz/htpc/pulseeight-usb-hdmicec-adapter/
- https://www.mythtv.org/wiki/HDMI-CEC
Appendices
dmesg
usb 2-1: new full-speed USB device number 6 using ohci-pci usb 2-1: New USB device found, idVendor=2548, idProduct=1002 usb 2-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3 usb 2-1: Product: USB-CEC Adapter usb 2-1: Manufacturer: Pulse-Eight usb 2-1: SerialNumber: v5 input: Pulse-Eight USB-CEC Adapter as /devices/pci0000:00/0000:00:02.0/usb2/2-1/2-1:1.2/input/input12 hid-generic 0003:2548:1002.0006: input,hidraw0: USB HID v1.10 Mouse [Pulse-Eight USB-CEC Adapter] on usb-0000:00:02.0-1/input2 cdc_acm 2-1:1.0: ttyACM0: USB ACM device usbcore: registered new interface driver cdc_acm cdc_acm: USB Abstract Control Model driver for USB modems and ISDN adapters sound hdaudioC0D0: HDMI: invalid ELD data byte 41
cec scan
# echo scan | cec-client -d 1 -s /dev/ttyACM0 log level set to 1 opening a connection to the CEC adapter... requesting CEC bus information ... CEC bus information =================== device #0: TV address: 0.0.0.0 active source: yes vendor: Samsung osd string: TV CEC version: 1.3a power status: on language: eng device #1: Recorder 1 address: 1.0.0.0 active source: no vendor: Pulse Eight osd string: CECTester CEC version: 1.4 power status: on language: eng device #4: Playback 1 address: 2.2.0.0 active source: no vendor: Panasonic osd string: Playback 1 CEC version: 1.3a power status: standby language: ??? device #5: Audio address: 2.0.0.0 active source: no vendor: Yamaha osd string: RX-V677 CEC version: 1.4 power status: on language: ??? currently active source: TV (0)
cec-client help
================================================================================
Available commands:
[tx] {bytes} transfer bytes over the CEC line.
[txn] {bytes} transfer bytes but don't wait for transmission ACK.
[on] {address} power on the device with the given logical address.
[standby] {address} put the device with the given address in standby mode.
[la] {logical address} change the logical address of the CEC adapter.
[p] {device} {port} change the HDMI port number of the CEC adapter.
[pa] {physical address} change the physical address of the CEC adapter.
[as] make the CEC adapter the active source.
[is] mark the CEC adapter as inactive source.
[osd] {addr} {string} set OSD message on the specified device.
[ver] {addr} get the CEC version of the specified device.
[ven] {addr} get the vendor ID of the specified device.
[lang] {addr} get the menu language of the specified device.
[pow] {addr} get the power status of the specified device.
[name] {addr} get the OSD name of the specified device.
[poll] {addr} poll the specified device.
[lad] lists active devices on the bus
[ad] {addr} checks whether the specified device is active.
[at] {type} checks whether the specified device type is active.
[sp] {addr} makes the specified physical address active.
[spl] {addr} makes the specified logical address active.
[volup] send a volume up command to the amp if present
[voldown] send a volume down command to the amp if present
[mute] send a mute/unmute command to the amp if present
[self] show the list of addresses controlled by libCEC
[scan] scan the CEC bus and display device info
[mon] {1|0} enable or disable CEC bus monitoring.
[log] {1 - 31} change the log level. see cectypes.h for values.
[ping] send a ping command to the CEC adapter.
[bl] to let the adapter enter the bootloader, to upgrade
the flash rom.
[r] reconnect to the CEC adapter.
[h] or [help] show this help.
[q] or [quit] to quit the CEC test client and switch off all
connected CEC devices.
================================================================================
lsusb
Bus 002 Device 006: ID 2548:1002
Couldn't open device, some information will be missing
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 1.10
bDeviceClass 0 (Defined at Interface level)
bDeviceSubClass 0
bDeviceProtocol 0
bMaxPacketSize0 32
idVendor 0x2548
idProduct 0x1002
bcdDevice 10.00
iManufacturer 1
iProduct 2
iSerial 3
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 100
bNumInterfaces 3
bConfigurationValue 1
iConfiguration 0
bmAttributes 0xa0
(Bus Powered)
Remote Wakeup
MaxPower 10mA
Interface Association:
bLength 8
bDescriptorType 11
bFirstInterface 0
bInterfaceCount 2
bFunctionClass 2 Communications
bFunctionSubClass 2 Abstract (modem)
bFunctionProtocol 1 AT-commands (v.25ter)
iFunction 0
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 1
bInterfaceClass 2 Communications
bInterfaceSubClass 2 Abstract (modem)
bInterfaceProtocol 1 AT-commands (v.25ter)
iInterface 0
CDC Header:
bcdCDC 1.10
CDC Call Management:
bmCapabilities 0x03
call management
use DataInterface
bDataInterface 1
CDC ACM:
bmCapabilities 0x06
sends break
line coding and serial state
CDC Union:
bMasterInterface 0
bSlaveInterface 1
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x83 EP 3 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0020 1x 32 bytes
bInterval 255
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 1
bAlternateSetting 0
bNumEndpoints 2
bInterfaceClass 10 CDC Data
bInterfaceSubClass 0 Unused
bInterfaceProtocol 0
iInterface 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0020 1x 32 bytes
bInterval 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x02 EP 2 OUT
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0020 1x 32 bytes
bInterval 0
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 2
bAlternateSetting 0
bNumEndpoints 1
bInterfaceClass 3 Human Interface Device
bInterfaceSubClass 0 No Subclass
bInterfaceProtocol 2 Mouse
iInterface 0
HID Device Descriptor:
bLength 9
bDescriptorType 33
bcdHID 1.10
bCountryCode 0 Not supported
bNumDescriptors 1
bDescriptorType 34 Report
wDescriptorLength 50
Report Descriptors:
** UNAVAILABLE **
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x84 EP 4 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0008 1x 8 bytes
bInterval 255
