How to use this

Question

How to use this

danielkucera opened this issue 3 years ago · comments

Daniel Kucera commented 3 years ago

Hi @AndrewD ,
Thank you very much for this project, I would like to use this module.

Is it working?
Do you have some example implementation?

Thank you.

AndrewD · Answer 1 · Sat Mar 19 2022 17:53:56 GMT+0800 (China Standard Time)

Hi Daniel, It's still a work in progress because I haven't had time to complete the testing. I think I may have a patch or two outstanding. I was testing with Linux on litex and got it to transmit one message, so very close, I think there was just an issue with the way I integrated the interrupt. I have patches to integrate it in that tree but can't remember if I've pushed them. Are you planning to use an operating system? We are going to use this with nuttx but haven't looked at writing a driver yet. I think there was an example integration for expix5 in a bench directory, but that may not be public either? What is your target? Kind regards, Andrew

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On Sat, Mar 19, 2022, 7:51 PM Daniel Kucera ***@***.***> wrote: Hi @AndrewD <https://github.com/AndrewD> , Thank you very much for this project, I would like to use this module. Is it working? Do you have some example implementation? Thank you. — Reply to this email directly, view it on GitHub <#1>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AAAX6Y3RXEMXBKNQLPXA56TVAWIQXANCNFSM5RDXRHYQ> . Triage notifications on the go with GitHub Mobile for iOS <https://apps.apple.com/app/apple-store/id1477376905?ct=notification-email&mt=8&pt=524675> or Android <https://play.google.com/store/apps/details?id=com.github.android&referrer=utm_campaign%3Dnotification-email%26utm_medium%3Demail%26utm_source%3Dgithub>. You are receiving this because you were mentioned.Message ID: ***@***.***>

Daniel Kucera · Answer 2 · Sun Mar 20 2022 01:58:59 GMT+0800 (China Standard Time)

My ultimate goal is a usb/ethernet to multiple (3,4,5, more...) can bus converter. It would forward all received messages from all can buses to ethernet (probably UDP) and those from ethernet back to respective can bus.
It would sit in my car and provide easy interface for logging all the data.

I believe this should be possible without some advanced OS, just a basic firmware running on risc-v soc but I am just a noob, we will see how it goes...

As you say it should be mostly usable, I'm going to try to synthesize the soc with this module.
If I find some issues, I'm gonna report them if you agree.

AndrewD · Answer 3 · Sun Mar 20 2022 06:32:47 GMT+0800 (China Standard Time)

Hi Daniel, If you are new to this space I would highly recommend you at least have a look at using an operating system. All our products were traditionally bare metal but we have moved any new work to an RTOS over the last 10years. Having used several we are now moving to nuttx for our next product. It will make can and ethernet easier for you to use once you get over the learning curve. I would not suggest Linux for embedded work like this. The learning curve there is way steeper, I went through that and we moved away to other options! Great for a desktop though! I'll be looking at the can integration again soon and now that I know you are interested I'll ensure that tree is kept more up to date. Andrew

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On Sun, Mar 20, 2022, 4:59 AM Daniel Kucera ***@***.***> wrote: My ultimate goal is a usb/ethernet to multiple (3,4,5, more...) can bus converter. It would forward all received messages from all can buses to ethernet (probably UDP) and those from ethernet back to respective can bus. It would sit in my car and provide easy interface for logging all the data. I believe this should be possible without some advanced OS, just a basic firmware running on risc-v soc but I am just a noob, we will see how it goes... As you say it should be mostly usable, I'm going to try to synthesize the soc with this module. If I find some issues, I'm gonna report them if you agree. — Reply to this email directly, view it on GitHub <#1 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AAAX6Y3OEDAVEETPZVTPU43VAYIW3ANCNFSM5RDXRHYQ> . Triage notifications on the go with GitHub Mobile for iOS <https://apps.apple.com/app/apple-store/id1477376905?ct=notification-email&mt=8&pt=524675> or Android <https://play.google.com/store/apps/details?id=com.github.android&referrer=utm_campaign%3Dnotification-email%26utm_medium%3Demail%26utm_source%3Dgithub>. You are receiving this because you were mentioned.Message ID: ***@***.***>

AndrewD · Answer 4 · Mon Mar 21 2022 14:28:54 GMT+0800 (China Standard Time)

I've pushed some local changes from last year and some cleanups from today that should help a lot.

AndrewD · Answer 5 · Sun Mar 27 2022 15:14:39 GMT+0800 (China Standard Time)

Hi Daniel,

How are you going with litecan? Did you have success building vhdl directly, for example? I've done more testing and with a patch the Linux driver is successfully sending messages but the receive fifo has issues, which I suspect is due the an issue with either ghdl>verilog or the verilog build for exp5. I'll try another FPGA family (xylinx or efinix) in a day or two.

AndrewD · Answer 6 · Wed Apr 06 2022 10:17:13 GMT+0800 (China Standard Time)

Daniel: I've pushed a commit to that fixes and issue with the IP core bus integration and the Linux CAN driver now works OK: can transmit and receive messages.

Daniel Kucera · Answer 7 · Thu Apr 07 2022 07:20:24 GMT+0800 (China Standard Time)

Sorry for the silence but I have about 300 hundred projects in progress so I am jumping between them :)
Unfortunately, I don't have such a big FPGA to run Linux on Litex, Spartan 6 is the biggest I have and for EBAZ4205 there is no support for Litex yet AFAIK.

Btw, have you seen the mainlining effort from Pavel Pisa? https://marc.info/?t=164790573600002&r=1&w=2
Maybe you can suggest your patches there.

AndrewD · Answer 8 · Thu Apr 07 2022 12:15:11 GMT+0800 (China Standard Time)

Yes, I am in contact with Pavel and the CTU team and will be pushing the patches to them. I'm only using linux as a testbed and I'm working with CTU to dual license the Linux driver so it can be ported to nuttx. PS I had noticed you have lots of GitHub projects: good to see!

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On Thu, Apr 7, 2022, 9:20 AM Daniel Kucera ***@***.***> wrote: Sorry for the silence but I have about 300 hundred projects in progress so I am jumping between them :) Unfortunately, I don't have such a big FPGA to run Linux on Litex, Spartan 6 is the biggest I have and for EBAZ4205 there is no support for Litex yet AFAIK. Btw, have you seen the mainlining effort from Pavel Pisa? https://marc.info/?t=164790573600002&r=1&w=2 Maybe you can suggest your patches there. — Reply to this email directly, view it on GitHub <#1 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AAAX6Y5H26ZT5VEQ6XHITPDVDYL4HANCNFSM5RDXRHYQ> . You are receiving this because you modified the open/close state. Message ID: ***@***.***>

AndrewD · Answer 9 · Thu Apr 07 2022 17:39:08 GMT+0800 (China Standard Time)

I had a look at EBAZ4205 and realized it was a cheap zynq board I hadn't tripped over so I ordered one. Zynq seems to be supported by litex so adding this should be quite easy I suspect and an interesting platform for experimentation.

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On Thu, Apr 7, 2022, 9:20 AM Daniel Kucera ***@***.***> wrote: Sorry for the silence but I have about 300 hundred projects in progress so I am jumping between them :) Unfortunately, I don't have such a big FPGA to run Linux on Litex, Spartan 6 is the biggest I have and for EBAZ4205 there is no support for Litex yet AFAIK. Btw, have you seen the mainlining effort from Pavel Pisa? https://marc.info/?t=164790573600002&r=1&w=2 Maybe you can suggest your patches there. — Reply to this email directly, view it on GitHub <#1 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AAAX6Y5H26ZT5VEQ6XHITPDVDYL4HANCNFSM5RDXRHYQ> . You are receiving this because you modified the open/close state.Message ID: ***@***.***>