LitexCNC: firmware and driver for 5A-75B and 5A-75E
17 Jan 2024 21:49 #290976
by TOLP2
Replied by TOLP2 on topic LitexCNC: firmware and driver for 5A-75B and 5A-75E
Congratulations! From here you can start building your config and machine.
The command "loadrt litexcnc_eth" is no longer supported, everything is done by the loadrt litexcnc connections="eth:10.0.0.10" command. In the documentation this has been modified, but here on the forum there are indeed old messages with the old commands. But keep pushing forward, will try to answer the questions as fast as I can.
The command "loadrt litexcnc_eth" is no longer supported, everything is done by the loadrt litexcnc connections="eth:10.0.0.10" command. In the documentation this has been modified, but here on the forum there are indeed old messages with the old commands. But keep pushing forward, will try to answer the questions as fast as I can.
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19 Jan 2024 15:08 #291124
by uba100
Replied by uba100 on topic LitexCNC: firmware and driver for 5A-75B and 5A-75E
This means that the example here in the instructions is no longer correct, right?
litex-cnc.readthedocs.io/en/latest/modules/pwm.html
litex-cnc.readthedocs.io/en/latest/modules/pwm.html
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19 Jan 2024 16:03 #291128
by TOLP2
Replied by TOLP2 on topic LitexCNC: firmware and driver for 5A-75B and 5A-75E
All examples have been updated and should work. There have not been any changes to PWM the last few months.
If you find things not working or errors, please let me know.
If you find things not working or errors, please let me know.
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19 Jan 2024 17:15 #291134
by uba100
Replied by uba100 on topic LitexCNC: firmware and driver for 5A-75B and 5A-75E
The examples in the Modules section all still have the command at the beginning:
"loadrt litexcnc_eth..."
at the beginning.
Hence my question.
"loadrt litexcnc_eth..."
at the beginning.
Hence my question.
The following user(s) said Thank You: TOLP2
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19 Jan 2024 19:28 #291140
by TOLP2
Replied by TOLP2 on topic LitexCNC: firmware and driver for 5A-75B and 5A-75E
Thanks for spotting that one. I checked all modules and pages and corrected them.
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22 Jan 2024 10:47 #291332
by deroj
Replied by deroj on topic LitexCNC: firmware and driver for 5A-75B and 5A-75E
When you rewrite it could you please give an example for an inverted PWM Output?
Thanks
Thanks
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22 Jan 2024 22:17 #291373
by TOLP2
Replied by TOLP2 on topic LitexCNC: firmware and driver for 5A-75B and 5A-75E
I'm afraid that the inverted PWM output is not supported yet, without doing some tricks. I think I will make an issue for this and add it to the firmware and driver.
Two possibilities:
Two possibilities:
- inverting the output when compiling the firmware. Easiest to implement, however not very flexible
- inverting the output using a HAL parameter, similar to GPIO which can also be inverted from the HAL. One can choose to:
- either invert the duty-cycle (thus a duty-cycle of 5% will be send out as 95%, which is effectively the same as inversing the signal, however the start of the signal shifts) NOTE: this is the trick to 'invert' the signal in the current situation, by choosing scale and offset smart;
- send an extra WORD to the FPGA with the config of the PWM. This case, the start of the PWM (and thus the frequency) is always fixed.
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23 Jan 2024 07:21 #291396
by deroj
Replied by deroj on topic LitexCNC: firmware and driver for 5A-75B and 5A-75E
For me both are ok.
But then please explain the Trick
I did not get it to work and therefore I changed Firmware.
But then please explain the Trick
I did not get it to work and therefore I changed Firmware.
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23 Jan 2024 20:37 - 23 Jan 2024 21:24 #291463
by TOLP2
Replied by TOLP2 on topic LitexCNC: firmware and driver for 5A-75B and 5A-75E
I made an issue / feature request on my GitHub for this:
github.com/Peter-van-Tol/LiteX-CNC/issues/76
I have chosen to add the extra WORD and add the param invert-output to the PWM modules.
@deroj: are you willing to test this branch?
The following steps can be taken to test the changes to LitexCNC:
Re-install the driver and recompile the firmware:
And try the new parameter invert-output for the PWM modules.
github.com/Peter-van-Tol/LiteX-CNC/issues/76
I have chosen to add the extra WORD and add the param invert-output to the PWM modules.
@deroj: are you willing to test this branch?
The following steps can be taken to test the changes to LitexCNC:
pip3 install git+https://github.com/Peter-van-Tol/LiteX-CNC@76-add-option-invert-pwm-outputRe-install the driver and recompile the firmware:
sudo env "PATH=$PATH" litexcnc install_driver
litexcnc build_firmware ...
litexcnc flash_firmware ...And try the new parameter invert-output for the PWM modules.
Last edit: 23 Jan 2024 21:24 by TOLP2. Reason: Work finished
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24 Jan 2024 08:28 #291504
by deroj
Replied by deroj on topic LitexCNC: firmware and driver for 5A-75B and 5A-75E
I really would like to test it, but I am back home in two weeks...
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