Difference between revisions of "Bticino F454"
(More hardware info - just found answer to speed question in my notes ...) |
(Add links to publications about F454 hardware.) |
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''Question: Why DM365 - why does the F454 need this 720p en/decoding capability. Wouldn't a DM355 also do it? Related to video door entry systems?'' | ''Question: Why DM365 - why does the F454 need this 720p en/decoding capability. Wouldn't a DM355 also do it? Related to video door entry systems?'' | ||
| + | |||
| + | The following talk by [http://it.linkedin.com/pub/raffaele-recalcati/b/7b/3a9 Raffaele Recalcati] on [https://archive.fosdem.org/2011 FOSDEM 2011] provides some more details: [https://archive.fosdem.org/2011/schedule/event/davinci.html DaVinci dm365 for home automation] [http://free-electrons.com/pub/video/2011/fosdem/fosdem2011-recalcati-home-automation.webm Video] [http://elinux.org/images/1/1f/Basi_and_dingo.pdf Slides] ''(English)''. | ||
| + | However it does not explicitly mention the F454. It includes background information, development history and even block diagrams. | ||
| + | From the same author there is a presentation from 2012 called [http://www.gl-como.it/wp-content/uploads/2012/09/Linux_in_Bticino_LinuxDay2012.pdf Linux in Bticino] ''(Italian)''. It apparently includes more of Bticino's history in home automation and even something on the userspace application stack. | ||
''TODO: more'' | ''TODO: more'' | ||
Revision as of 09:39, 27 November 2014
This page shall be a container for various pieces of information about Bticion's F454. Most of the information is - for now - derived from just poking around on the device with SSH. So, due to this and in general: of course certain details can be unsure or not accurate, because something has been overlooked.
The F454 is a typical embedded system using a SoC and running a Linux-based system.
Hardware
The F454 is based on TI's (Texas Instruments) DaVinci DM365 SoC, from 2009. The Wikipedia page Texas Instruments DaVinci can be used as a first overview.
The SoC does include, among many peripherals, an ARM processor:
- family: ARM9E
- architecture: ARMv5TEJ
- core: ARM926EJ-S
Apparently DM365 SoCs can run with 216 MHz, 270 MHz or 300 MHz.
A look at Linux' /proc/cpuinfo confirms:
root@basi:~# cat /proc/cpuinfo
Processor : ARM926EJ-S rev 5 (v5l)
BogoMIPS : 134.34
Features : swp half thumb fastmult edsp java
CPU implementer : 0x41
CPU architecture: 5TEJ
CPU variant : 0x0
CPU part : 0x926
CPU revision : 5
Hardware : BTicino BASI board
Revision : 0000
Serial : 0000000000000000
The system includes a device called bt_nexmed_hwmon.0. It is registered as a Linux hardware monitoring device and provides further information.
root@basi:~# cd /sys/devices/platform/bt_nexmed_hwmon.0
root@basi:/sys/devices/platform/bt_nexmed_hwmon.0# ls in* temp*
in1_input in1_label in2_input in2_label in4_input
in4_label in5_input in5_label temp1_input temp1_label
| input | label | typical value | comment |
|---|---|---|---|
| in1 | Hw version | 0 | |
| in2 | board identification | BASI BOARD | |
| in4 | cpu speed | 270MHz | |
| in5 | board configuration | 4 | unknown - what does it mean? |
| temp1 | Temperature | 38 | most likely in celcius? |
The DaVinci DM365 SoC includes a 720p H264 encoder and decoder - next other co-processors and seems to belong to the group of full-featured DaVinci SoCs of it's time (2008/2009).
Question: Why DM365 - why does the F454 need this 720p en/decoding capability. Wouldn't a DM355 also do it? Related to video door entry systems?
The following talk by Raffaele Recalcati on FOSDEM 2011 provides some more details: DaVinci dm365 for home automation Video Slides (English). However it does not explicitly mention the F454. It includes background information, development history and even block diagrams. From the same author there is a presentation from 2012 called Linux in Bticino (Italian). It apparently includes more of Bticino's history in home automation and even something on the userspace application stack.
TODO: more
Software
Tool Chain
Operating System
TODO
Applications
TODO
