160 Baud aldl scantool

[ahmed_salah]

no i want to read data stream from daewoo car i think it uses GM ECM running on ALDL baud 160

[mackrackit]

Oh, well that makes sense.

Go here and get the picmulticalc. http://www.mister-e.org/pages/utilitiespag.html
It will show how to set the USART for any baud.
Thats the best I can do for you.

[ahmed_salah]

is there any one who can guide me to start design this project i am new in picbasic

[mackrackit]

If you are new to this the first thing you need to do is learn how to blink an LED. Then learn how to make the LCD work, and then learn how to use the USART. (a different PIC chip will be needed)

Just how new are you? We need to know where to start.

[ahmed_salah]

hi,
thanks for your fast replay i can blink a led and also i can display text on lcd that what i test before

[mackrackit]

I think the next step would be to get a chip with hardware serial (USART) and work with that. The USART is not to much different than using SERIN2, just seems to be a bit more useful at times.

If you can find out exactly what the ECM baud is and if the signal is inverted or not. Can you connect a PC to it? Then we should be able to see what you have to work with.

[skimask]

thanks for your fast replay i can blink a led and also i can display text on lcd that what i test before

Do you have the actual ALDL160 protocol standard?
You can read it at 160 baud all day, but without the protocol or knowing how the data is formatted, the numbers are going to be jibberish on the LCD and useless.

And, for me anyways, a Google search on '160 baud aldl' brings me a whole load of decent links with hardware, software, and at the very least, a base to work with....if I was building an ALDL reader....which I'm not....

[ahmed_salah]

what chip have serial (USART) to start working with.
ECM baud rate 160 Baud
there is a lot of circuits which can be interfaced with PC and using special software we can see these data e

during my search on internet i found some one make circuit to do that using pic16f84 and lcd (20*4) but the one who design this circuit place assembely software for the pic but i am not good at all on assembely