Zum Inhalt springen

Led Matrix: Unterschied zwischen den Versionen

Overflo (Diskussion | Beiträge)
youtube + bilder aligned
Overflo (Diskussion | Beiträge)
Zeile 37: Zeile 37:




* http://www.i2c-bus.org/  very good read on i2c specs
* https://help.ubuntu.com/community/ViaEpiaDriHowto  kernel stuff for i2c
* http://robots.net/article/983.html article on this board
* http://robots.net/article/983.html article on this board
* <nowiki>http://www.nxp.com/#/pip/pip=[pfp=41735]|pp=[v=d,t=pfp,i=41735,fi=,ps=0][0]</nowiki> i2c specs
* http://codesink.org/eeprog.html sample userland app using i2c on the via board
* http://www.linuxjournal.com/article/7136 i2c kernel driver linux stuff


There are three data transfer speeds for the I2C bus: standard, fast-mode, and high-speed mode. Standard is '''100 Kbps.''' Fast-mode is '''400 Kbps''', and high-speed mode supports speeds up to '''3.4 Mbps'''. All are backward compatible. The I2C bus supports 7-bit and 10-bit address space devices and devices that operate under different voltages.
ok .. i2c will not work because via i2c is actually SMBus running at 16khz :(
.. but hey what about the OBVIOUS?
there is a parallelport which should give us 8-10 mbit :)


Ohoh
linux stuff in the works


http://archives.andrew.net.au/lm-sensors/msg29149.html
100kHz and 400kHz are *maximum* frequency for standard and high-speed
*I2C* busses. What your VIA bridge really is is an SMBus, so it must run
at a speed between 10kHz and 100kHz if I remember correctly.
As a matter of fact, I already measured both my VIA and Intel SMBus chips
at 16kHz, exactly like you. So I am not surprised at all by what you are
reporting.
kernel patch '''UNTESTED''':
http://archives.andrew.net.au/lm-sensors/msg29186.html


[[Kategorie:WhateverLab]]
[[Kategorie:WhateverLab]]
[[Kategorie:Projekte]]
[[Kategorie:Projekte]]
__NOTOC__
__NOTOC__