ColorCNC Colorlight 5A-75E/5A-75B as FPGA controller board
- ALittleOffTheRails
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28 Feb 2022 23:20 - 01 Mar 2022 01:17 #236072
by ALittleOffTheRails
Replied by ALittleOffTheRails on topic ColorCNC Colorlight 5A-75E/5A-75B as FPGA controller board
Are you going to document the changes required to get any form of input ? I can document the way I'm going to implement my procedure if you like.
I have a 5A-75E so I will be willing to help in testing, if you have any a build environment ready, eg any make files, are you going to be using the pluto based stepgen source as per Romanetz ?
ATM I'm waiting for some 74LVC245 buffers to arrive.
I have a 5A-75E so I will be willing to help in testing, if you have any a build environment ready, eg any make files, are you going to be using the pluto based stepgen source as per Romanetz ?
ATM I'm waiting for some 74LVC245 buffers to arrive.
Last edit: 01 Mar 2022 01:17 by ALittleOffTheRails.
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01 Mar 2022 10:34 #236086
by TOLP2
Replied by TOLP2 on topic ColorCNC Colorlight 5A-75E/5A-75B as FPGA controller board
If you could document your approach on enabling the inputs on a 5A-75E or 5A-75A, you're more then welcome. For the i5 and the i9 there are no changes required as far as I know.
The build files for the driver are available in the ./driver/build directory of the repo. However, the driver is in debug mode and will not transmit anything yet. I will create a separate debug driver (dumps everything to command line) and tidy up the ethernet driver so you should be able to test.
For building an image for the card, one could use the code below as an guideline (assuming you've installed the LiteX toolchain as described here ):
This will generate the files which can subsequently be uploaded to the board.
The build files for the driver are available in the ./driver/build directory of the repo. However, the driver is in debug mode and will not transmit anything yet. I will create a separate debug driver (dumps everything to command line) and tidy up the ethernet driver so you should be able to test.
For building an image for the card, one could use the code below as an guideline (assuming you've installed the LiteX toolchain as described here ):
pip install -r requirements.txt
python -m firmware <path-to-config-file>
This will generate the files which can subsequently be uploaded to the board.
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01 Mar 2022 11:47 #236094
by ALittleOffTheRails
Replied by ALittleOffTheRails on topic ColorCNC Colorlight 5A-75E/5A-75B as FPGA controller board
The i5 & i9 look good, but by the time you've got hold of the ethernet module & daughter board it's getting close to 7i92 money.
Anyways the gateware built ok, once you have a driver sorted I can start testing.
I did a write up of installing Litex and oss-cad-suite here forum.linuxcnc.org/27-driver-boards/4442...rcnc?start=60#235932
Anyways the gateware built ok, once you have a driver sorted I can start testing.
I did a write up of installing Litex and oss-cad-suite here forum.linuxcnc.org/27-driver-boards/4442...rcnc?start=60#235932
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01 Mar 2022 16:35 #236117
by cncwhacko
Replied by cncwhacko on topic ColorCNC Colorlight 5A-75E/5A-75B as FPGA controller board
I'd be happy to help test things as well. I have a 5a-75E V8 (which has same mapping as V6).
It seems your current version of the driver has nothing to do with step generation, is that correct?
It seems your current version of the driver has nothing to do with step generation, is that correct?
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01 Mar 2022 22:27 #236137
by TOLP2
Replied by TOLP2 on topic ColorCNC Colorlight 5A-75E/5A-75B as FPGA controller board
I created a dedicated debug driver and removed the debug code from the etherbone driver. This means that the driver should work for a 5a-75a or 5a-75e.
At this moment only GPIO out is supported by the firmware. The next step is to add more functions to the board, which include PWM (coming tomorrow) and stepgen. My goal is to mimic the existing functions of LinuxCNC as close as possible (thus exporting the same input pins and parameters), so:
It seems your current version of the driver has nothing to do with step generation, is that correct?
At this moment only GPIO out is supported by the firmware. The next step is to add more functions to the board, which include PWM (coming tomorrow) and stepgen. My goal is to mimic the existing functions of LinuxCNC as close as possible (thus exporting the same input pins and parameters), so:
- PWM will be based on pwmgen and will export the same pins and parameters for a single output PWM. At start only type 0 will be supported, with dithering;
- stepgen will be based on stepgen . At start I would like to support type 0 (step/dir) as well as type 1 (up/down).
- encoder will be based on encoder .
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02 Mar 2022 14:16 - 02 Mar 2022 14:17 #236176
by TOLP2
Replied by TOLP2 on topic ColorCNC Colorlight 5A-75E/5A-75B as FPGA controller board
PWM is done (without dithering though), using the same interface af the pwmgen component from LinuxCNC, see repository for the changes:
github.com/Peter-van-Tol/LiteX-CNC
Did not have the time to add the PWM the documenation / README yet, but I think the pins are self-explanatory at this moment.
github.com/Peter-van-Tol/LiteX-CNC
Did not have the time to add the PWM the documenation / README yet, but I think the pins are self-explanatory at this moment.
Last edit: 02 Mar 2022 14:17 by TOLP2.
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02 Mar 2022 23:39 #236227
by andypugh
Replied by andypugh on topic ColorCNC Colorlight 5A-75E/5A-75B as FPGA controller board
Late to the party
PDM is probably worth considering. I think that suits digital systems with a fixed clock rate rather better than PWM. It's a little easier to implement, and has a (I think) a lower phase lag with changing command inputs.
PDM is probably worth considering. I think that suits digital systems with a fixed clock rate rather better than PWM. It's a little easier to implement, and has a (I think) a lower phase lag with changing command inputs.
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03 Mar 2022 01:28 #236237
by ALittleOffTheRails
A wizard is never late, nor is he early. He arrives precisely when he means to.
Replied by ALittleOffTheRails on topic ColorCNC Colorlight 5A-75E/5A-75B as FPGA controller board
Late to the party
PDM is probably worth considering. I think that suits digital systems with a fixed clock rate rather better than PWM. It's a little easier to implement, and has a (I think) a lower phase lag with changing command inputs.
A wizard is never late, nor is he early. He arrives precisely when he means to.
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03 Mar 2022 11:30 #236254
by tommylight
Replied by tommylight on topic ColorCNC Colorlight 5A-75E/5A-75B as FPGA controller board
Gandalf from Lord of the rings ?
A wizard is never late, nor is he early. He arrives precisely when he means to.
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03 Mar 2022 23:22 #236291
by ALittleOffTheRails
Replied by ALittleOffTheRails on topic ColorCNC Colorlight 5A-75E/5A-75B as FPGA controller board
Yeah had a foreman say that to me when I was just on time for a job, thought it was kinda funny.
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