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ECU hacking -> ECU hacking -> need help with connecting 08 R1 gauge to older model
Post Info TOPIC: need help with connecting 08 R1 gauge to older model
NeeD 4 SpeeD


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need help with connecting 08 R1 gauge to older model
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as i posted in the other gauge thread ,  i want to connect this gauge to my old bike , which uses simple pulse signals for speed and analog signals for temp etc...
the new gauge uses k-line and transmits data both ways - half duplex bi directional line.
i dont even know where to start , so any help would be apriciated.
(btw the tachometer data is not transmited on the k-line, it works old school way with a simple pulse)

i guess the first thing to do is to find a way to connect it to a pc , so i found this circuit :
http://www.skpang.co.uk/downloads/highspeed-iso.zip
do u think that this is where i should start?

anyway , here are some pics of the gauge with the main mcu .
this is the datasheet for the mcu
http://www.necel.com/nesdis/image/U10335EJ2V0DS00.pdf



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NeeD 4 SpeeD


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if anybody needs bigger pics i'll post em up.

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psyche


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Why don't you buy a simple and cheap usb-rs232 ttl dongle??? These are pretty cheap on eb@y!!! This is more flexible and can communicate using abnormal datarates!! Suzuki is 7812 bps!! But yet i don't think that you will do any progress with just the gauges! What you need is an ECU and try to snif the datastream! Then built a program producing the same datastream and make changes and see what happens!!!! RidgeRacer and PetriK should be able to give you some more info on how to do it!!!

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NeeD 4 SpeeD


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psyche wrote:

Why don't you buy a simple and cheap usb-rs232 ttl dongle??? These are pretty cheap on eb@y!!! This is more flexible and can communicate using abnormal datarates!! Suzuki is 7812 bps!! But yet i don't think that you will do any progress with just the gauges! What you need is an ECU and try to snif the datastream! Then built a program producing the same datastream and make changes and see what happens!!!! RidgeRacer and PetriK should be able to give you some more info on how to do it!!!


i'm a bit confused ,how usb/rs232 gonna help ? the transmission is k-line...confuse

 



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psyche


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What you need is a USBTTL converter with ftdi chip!!with this converter you can use it to monitor different signals such as ttl level!!! K-line is ttl level i think so it is going to help you!!!

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balze2


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Hi,


EDIT : Ooops, sorry i should have looked in your ZIP file first !!!

please ignore the following ;)

give this one a try (if you're familiar with hardware-design confuse)
http://www.freescale.com/files/analog/doc/data_sheet/MC33290.pdf

here you can get a complete construction set for converting k-line to RS232.

There are links to software too.

Pay attention to what you do. It's possible to flash controller using k-line!

Greetings,

balze2

-- Edited by balze2 on Wednesday 29th of July 2009 08:02:41 AM

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balze2


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Maybe you should try to find out how the k-line reaches your controller.

The NEC Datasheet says there are two serial ports (3-wire, SPI, 2wire or UART mode)

The k-line should connect to these ports.
Maybe on of the ICs is an IC similar to the MC33290 and converts k-line to RS232.
Then you should find a connection between Controller pins and the IC and the IC and the connector.

Greetings,

balze2

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NeeD 4 SpeeD


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balze2 wrote:

Maybe you should try to find out how the k-line reaches your controller.

The NEC Datasheet says there are two serial ports (3-wire, SPI, 2wire or UART mode)

The k-line should connect to these ports.
Maybe on of the ICs is an IC similar to the MC33290 and converts k-line to RS232.
Then you should find a connection between Controller pins and the IC and the IC and the connector.

Greetings,

balze2



 thanks , i will look for any chips that might do that...



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