Bticino F454

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Revision as of 22:25, 26 November 2014 by Joft (talk | contribs) (More hardware info - just found answer to speed question in my notes ...)
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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.


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?

TODO: more


Tool Chain

Operating System