EDS to DBC

[madshadsen]

Hi there,

I was wondering if you've considered adding an EDS to DBC converter for use with CANopen EDS files? I think it would be really helpful for many users!

[ebroecker]

Thanks for this hint.
But I have absolute no idea about canopen.
So some external help would be needed.

[mrfrenzy]

This would be a really useful feature to have as EDS-files are so widespread with a lot of hardware.
The file specification is well documented and free to download https://www.can-cia.org/can-knowledge/canopen/cia306/#

[mtslab]

If you guys figure out how to do this I will love to see it. I don't know why companies bother on writing EDS files if the standard is dbc.

[ebroecker]

I looked a bit into EDS but I'm not really able to understand how they work and how this could be translated to dbc.

Can someone provide some basic example?

[mrfrenzy]

It is great if you want to look at the possibility of implementing this, I will help any way I can. Here is a basic example.
Bürkert makes a motor valve called 3280. You can send an opening percentage 0-100% via CAN and it will open this much. It will also respond back with how much it is actually open, the current operating status and if there are any problems.

To aid communication they supply an EDS file with a lot of information.
Most CANopen devices support NMT, SDO and PDO.
Network Management are used for device status.
Service Data Objects are used for programming.
Process Data Objects are used for communication and starts transmitting as soon as the device is powered up.

To make the example easy let's start with PDO only.
Opening the EDS file in any EDS viewer we can see what PDOs are supported automatically:

(this can be changed with SDO configuration, but let's not worry about that to begin with).

Receive PDO 1 is a communication object the slave RECEIVES from our master. It has two parameters: CMDdigital and PVdigital.
Receive PDO 2 is a communication object the slave RECEIVES from our master. It has one parameter: SPDigital
Transmit PDO 1 is a communication object the slave SENDS to our master. It has two parameters: CMD and CMD_Disp
etc.

I have made a dbc file with the most important objects as an example, I attach this, the EDS file and a PDF file describing the contents. As you can see all the data in my dbc file can be derived from the EDS file.

BUER328X_1_14.eds.zip
MA3280-EDS-file-EU-ML.pdf
Burkert 3280 dbc.zip

[ebroecker]

Hi @mrfrenzy

Thank you for these details, this will help a lot!

Next I'll build some basic code example

[ebroecker]

Hi @mrfrenzy,

I assembled some code.
As far as I understood, the arbitration-ids are dependent from the node_id.

So my code create this dbc with node_id 1:

MotorValve.dbc.zip

you can even test the code:
pip install git+https://github.com/ebroecker/canmatrix/tree/eds_support_488

[AIRicky]

Hi there,

I was wondering if you've considered adding an EDS to DBC converter for use with CANopen EDS files? I think it would be really helpful for many users!

Hi there,

Do you know how to convert a DBC file to EDS?

Best,
Ricky

[FerrariX]

https://github.com/ebroecker/canmatrix/tree/eds_support_488

Hi,

I'm getting a fatal error of repository not found.

output from running 'pip install git+https://github.com/ebroecker/canmatrix/tree/eds_support_488'

fatal: repository 'https://github.com/ebroecker/canmatrix/tree/eds_support_488/' not found
error: subprocess-exited-with-error

I've also tried running 'pip install git+https://github.com/ebroecker/canmatrix#egg=canmatrix[eds]' but still got error testing the posted 'BUER328X_1_14.eds' file.

Update:
I was able to get it to install using 'pip install -U git+https://github.com/ebroecker/canmatrix.git@eds_support_488'
Unfortunately, it gave me the following errors when I ran 'canconvert BUER328X_1_14.eds test.dbc':

ldf is not supported
xls is not supported
xlsx is not supported
yaml is not supported
eds is not supported
INFO - convert - Importing BUER328X_1_14.eds ...
ERROR - init - This file format is not supported for reading
INFO - convert - done

INFO - convert - Exporting test.dbc ...
Traceback (most recent call last):
File "", line 198, in _run_module_as_main
File "", line 88, in _run_code
....

Thanks

[ebroecker]

Hi @FerrariX ,

sorry for the maybe wrong link.
You managed to find a working link for checkout.

I forgot to tell:
you need the module canopen also.
so could you try a pip install canopen and try again?

[danjhunter]

Hi there,
I was wondering if you've considered adding an EDS to DBC converter for use with CANopen EDS files? I think it would be really helpful for many users!

Hi there,

Do you know how to convert a DBC file to EDS?

Best, Ricky

Is it possible to convert a .DBC file to .EDS file with this branch @ebroecker? Specifically could you add ability to write .EDS format? Thanks