Need help with STN1110

[TiagoRibeiro]

Hello, i have the kit sparkfun multi-protocol OBDll with STN1110 but i can not establish communication KWP. I dont know how to do that.

I did some simulation tests, using an oscilloscope and realized that when sending commands to the ECU nothing comes out of the port ISO_K_TX or ISO_L_TX, the only thing that comes out of the port is a 25ms change line status(i think is some kind of wakeup).
So my conclusion is that maybe I am not correctly setting the STN1110.
- Can anyone provide a guide on how to start the simulated communication (without ECU)
with each protocol available on board?
- Does anyone here have experience with this IC?
If anyone can help me I would greatly appreciate, thanks.:wink:

 

[D.A.(Tony)Stewart]

Have you read the spark fun docs or the chip specs? **broken link removed**

 

[TiagoRibeiro]

Yes I have read, but I found nothing like startup guide. I use the configuration commands for simulation, but without any success.

 

[D.A.(Tony)Stewart]

Hmm well the link I posted includes the startup guide.

 

[TiagoRibeiro]

If you're referring to the Guidelines for Getting Started with STN1110 on page 8, there he just guide me on how to make the electrical connections to mount a board test with STN1110.:-(

- - - Updated - - -

My main doubt is to know why does not come out any data through the port ISO (KWP) when I send data?:???: The oscilloscope captures just a change in the state of 25ms line and nothing more.:?: