LIN Communication

ishan maniar

Prodigy 175 points

Other Parts Discussed in Thread: HALCOGEN

Hie,

I am using the TMS570 HDK, And I want to Transmit and Receive LIN messages, over a LIN bus.

Is there any code example for LIN communication, in a similar way there are example codes for CAN?

An example would really help.

Cheers, Ishan

over 12 years ago

0 Zhaohong Zhang over 12 years ago

TI__Mastermind 22715 points

Ishan,

You can use the HALCoGen tool to generate the software you need. I am also attaching some example code for your reference.

8585.LIN_CAN_example.zip

Thanks and regards,

Zhaohong

0 ishan maniar over 12 years ago in reply to Zhaohong Zhang

Prodigy 175 points

Hi,

Thanks a lot for this example.

But it would be more helpful if you could provide me an example code for the sys_main.c file after the module is configured using HALCOGEN.

similar to the examples given for CANComm,I2C etc in the Halcogen Examples.

Awaiting Your Reply,

Regards,

Ishan

0 Mehmet Karadeniz over 11 years ago in reply to ishan maniar

Prodigy 95 points

Hi,

Thanks a lot for this example.

But it would be more helpful if you could provide me an example code for the sys_main.c file after the module is configured using HALCOGEN.

similar to the examples given for CANComm,I2C etc in the Halcogen Examples.

Awaiting Your Reply,

Regards,

Ishan

----------

Hi,

I want to ask same question. Can you reply please?

0 NEERAJ KUMAR over 9 years ago in reply to Zhaohong Zhang

Intellectual 355 points

Hi,

Thanks a lot for this example.

But it would be more helpful if you could provide me an example code for the sys_main.c file after the module is configured using HALCOGEN.

similar to the examples given for CANComm,I2C etc in the Halcogen Examples.

Awaiting Your Reply,

Regards,

Ishan

----------

Hi,

I want to ask same question. Can you reply please?

0 Charles Tsai over 9 years ago in reply to NEERAJ KUMAR

TI__Guru**** 191886 points

We have LIN example for LC4357 device for which you can reference for your device. Go to HalCoGen->Help->Help topics->Examples. There are the example_Lin_Digital_Loopback.c and example_Lin_Digital_Loopback_interrupts.c

0 NEERAJ KUMAR over 9 years ago in reply to Charles Tsai

Intellectual 355 points

Hi Charles,

I am using the latest version of Halcogen - 04.05.02
Its not there in this halcogen version.

Can you please attach the code file along with the instructions on how to generate halcogen code ?

Thanks and Regards,

Neeraj

0 Charles Tsai over 9 years ago in reply to NEERAJ KUMAR

TI__Guru**** 191886 points

Hi Neeraj,
You need to first create a LC4357 project and then go to HalCoGen->Help->Help topics->Examples.

Or you can just go to HalcoGen->Examples and you will find device folders under which the TMS570LC43x you will find the two examples I mentioned.

0 NEERAJ KUMAR over 9 years ago in reply to Charles Tsai

Intellectual 355 points

Hi Charles,

I am using LM46x.
That's why i was initially unable to find.

I have found it. Thanks !!

Neeraj

0 NEERAJ KUMAR over 9 years ago in reply to Charles Tsai

Intellectual 355 points

Hi Charles,

I have one more query about LIN.

Using the example code, without using can transceiver, whatever the tx data is being transmitted to rx data. It is unlike CAN communication, where i have to use can transceiver. It surprised me as well. Also, i didn't get any signal on tx and rx pin of this launchpad. Can you please explain why is it like this ?

Actually, i want to test LIN transceiver by comparing the tx and rx data. I want to send the tx data using can transceiver to rx pin and then compare these two data.

How can i do that ?

Regards,

Neeraj

0 Charles Tsai over 9 years ago in reply to NEERAJ KUMAR

TI__Guru**** 191886 points

The example is in internal loopback mode. Perhaps this is the reason that you don't see the tx signal. Once you are familiar with the LIN example you can modify it to be in non-loopback mode. You should see LIN tx/rx signals on the booster pack expansion connector once you connect to your transceiver. See below J6 connector for LIN1TX/LIN1RX.

0 NEERAJ KUMAR over 9 years ago in reply to Charles Tsai

Intellectual 355 points

Hi Charles,

I appreciate your help very much.
Can you please give some idea or some references on how to modify it to be in non-loopback mode.
Actually, i am new to this LIN protocol and also my final project deadline is very close.

Thanks and Regards,
Neeraj

0 Charles Tsai over 9 years ago in reply to NEERAJ KUMAR

TI__Guru**** 191886 points

In the example, there is a call to linEnableLoopback(linREG1,Digital_Lbk). You just comment this line to disable loopback mode. Try this and see if you are seeing TX activity on the pin. You should be able to connect the TX pin back to RX pin on the launchpad and reuse the example.

0 NEERAJ KUMAR over 9 years ago in reply to Charles Tsai

Intellectual 355 points

Thanks!!
I already did this one but it is still not working.
I also thought that commenting linEnableLoopback(linREG1,Digital_Lbk) should work.
But unfortunately, its not the case.

Neeraj

0 Charles Tsai over 9 years ago in reply to NEERAJ KUMAR

TI__Guru**** 191886 points

Did the digital loopback work?

0 NEERAJ KUMAR over 9 years ago in reply to Charles Tsai

Intellectual 355 points

Before commenting linEnableLoopback(linREG1,Digital_Lbk), it was working fine with any transceiver.

But i want to use transceiver as i have to test it. So, i commented linEnableLoopback(linREG1,Digital_Lbk), but there is no signal on tx and rx pin.

Is there any other way ?

Regards,

Neeraj

0 Charles Tsai over 9 years ago in reply to NEERAJ KUMAR

TI__Guru**** 191886 points

I just replied you on the other post. As I said in the other post, I'm able to transmit the data from TX to RX bin with the internal digital loopback disabled. I simply connected the TX and RX pin together on the board. I don't have the transceiver. So you might want to check first if it works without the transceiver than investigate if it is transceiver related.

Since you open a new post for the same question, can you please close this one.

0 NEERAJ KUMAR over 9 years ago in reply to Charles Tsai

Intellectual 355 points

There is no verify button .
how can i close this one ?

Neeraj

0 Charles Tsai over 9 years ago in reply to NEERAJ KUMAR

TI__Guru**** 191886 points

HI Neeraj,
I will close this thread for you.

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