LIN bus -wake up needed for test

jaras — Tue, 21 Aug 2007 13:22:31 GMT

I'm desperate to solve a LIN-bus sensor problem. I connected two angle sensors from a car to a power source and a oscilloscope to the output pin of the sensor. I guess one sensor is the master and the other is a slave. But there is nothing coming out from the sensors. I was expecting a PWM-signal.
My qeustion, is the sensors expecting a wake-up signal before they will deliver any kind of data stream. Do I need a lin-bus simulator to send the wake-up and determine if the sensor is broken?

What I really try to achieve is a out of the car test bench so I can set up a LIN-bus device and determine if it is broken.

I'll be thankfull for any advice.

Re: LIN bus -wake up needed for test

celsoken — Tue, 21 Aug 2007 19:51:43 GMT

Your information seems to be confusing. First, LIN does not work w/ pwm signals on LIN data line. Maybe it could be SAE J1850. Second, it is strange to me hear that one sensor is a master and another is a slave. Normally the master is an ECU connected to a CAN network.

Before desperate attempts, try to get more info on your particular system.

If it is really LIN and if you just really need a wake up, it is quite easy, just drop the LIN line low for at least 150us.

I hope it helps.

Cheers,

Celso

8-bit MicrocontrollersのトピックLIN bus -wake up needed for test

LIN bus -wake up needed for test

Re: LIN bus -wake up needed for test