Flasher cable with mbus - creating software for it

[al_capote]

Hi folks!

Regarding jan's schematic for a mixed flasher/mbus cable, I'll start coding software that supports it this weekend.

In the meantime, I have some doubts:
- Does de data come inverted from the phone only, or it must be sent inverted too?
- Which pin do we use to send the data?
- Which schottky diodes can we use to replace the BAT42 one? (can't seem to find that in Portugal...)

I don't really understand very much about electronics, so I need all the help you can give me. (Jan, are you there? :) )

Regards,
../Al


(NOTE: For those who don't know what I'm talking about, please refer topic http://forum.gsmhosting.com/vbb/showthread.php?s=&threadid=17011&perpage=15&highlight=flasher%20diode%20mbus&pagenumber=1 )

[Dave.W]

this is how i see it, the lpt1 port automatically inverts the output on some of the pins (data pins) which is why the dejan interface uses a hex inverter to turn it back around :)
my own research:
(lpt1 port pin)-(lpt1 port pin name)-(pin info)-(data in or out)-(connection on phone)

22-Gnd-ground-n/a-Ground
13-Select-+ve-in-VPP
2-data 0-inverted-out-m bus
4-data 2-inverted-out-f bus Rx
6-data 4-inverted-out-B temp
11-busy-inverted(hardware inverted)-in-f bus Tx

hth a little:)

[al_capote]

Well, I'm thinking seriously in supporting MBUS through this cable in my Linux flasher.

Is there any difficulties I should be aware of?

Thanks,
../Al

[jan]

Hi

You can use any shottky diode, with low drop voltage.

Jan

[dimka]

Originally posted by Dave.W
this is how i see it, the lpt1 port automatically inverts the output on some of the pins (data pins) which is why the dejan interface uses a hex inverter to turn it back around :)

LPT port does NOT inverts output on any pin!!!
Dejan uses Hex Invertor to make better TTL-signal from LPT!
:o :rolleyes: :D

[dimka]

Originally posted by Nutzo

It does. Check 'busy'

Sorry, I mean data outputs (D0-D7). ;)