Host software startup process and Display driver issues

[38293312]

Problems encountered on startup，Share the schematic diagram of ST7789 connected to STM32F103
Can the windows system be used?

Please help me, thanks!

[abhra0897]

Hi, I've added instructions for windows support in the README. Check that file inside host_python_scripts folder. Also, I've added pin mapping in the main README.

[abhra0897]

Hi, 1. Firmware burning must be done by stlink. You need a stlink hardware and the flashing tool. Firmware flashing by usb is not supported. 2. I've recently added detailed steps for the host setup. There are a total of two README files. You should file required information there. Please let me know if you have any questions. Best regards, Avra Mitra

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On Fri, Jan 27, 2023 at 4:15 PM 38293312 ***@***.***> wrote: Hello, thank you very much for sharing such a good project, I am very interested in this project. Now I have a few questions, I would like your help 1: I am now burning the firmware you provided to the STM32F103 development board. Connect the computer USB, and now there is another device: Display. I did not find the driver for this device in the folder. 2: I am a stranger to python, and would like to ask you to provide a more detailed host software startup process. Thanks! — Reply to this email directly, view it on GitHub <#3>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AEDPTC4FEIX7QV3ZHHKDB4LWUORK5ANCNFSM6AAAAAAUIROWMY> . You are receiving this because you are subscribed to this thread.Message ID: ***@***.***>

[abhra0897]

Also, to use fast_host, you must build it for your os using cython. If cython is not already installed, install using pip. Then run the command to build the host given in README.

[38293312]

Also, to use fast_host, you must build it for your os using cython. If cython is not already installed, install using pip. Then run the command to build the host given in README.
cython is installed

cython is installed

[38293312]

Hi, 1. Firmware burning must be done by stlink. You need a stlink hardware and the flashing tool. Firmware flashing by usb is not supported. 2. I've recently added detailed steps for the host setup. There are a total of two README files. You should file required information there. Please let me know if you have any questions. Best regards, Avra Mitra
…
On Fri, Jan 27, 2023 at 4:15 PM 38293312 @.> wrote: Hello, thank you very much for sharing such a good project, I am very interested in this project. Now I have a few questions, I would like your help 1: I am now burning the firmware you provided to the STM32F103 development board. Connect the computer USB, and now there is another device: Display. I did not find the driver for this device in the folder. 2: I am a stranger to python, and would like to ask you to provide a more detailed host software startup process. Thanks! — Reply to this email directly, view it on GitHub <#3>, or unsubscribe https://github.com/notifications/unsubscribe-auth/AEDPTC4FEIX7QV3ZHHKDB4LWUORK5ANCNFSM6AAAAAAUIROWMY . You are receiving this because you are subscribed to this thread.Message ID: @.>

I have successfully burned the firmware through stlink! The computer can check the "display" device

[38293312]

Now after I start the host software "python start_host.py", the following screenshot problem appears. Does the windows10 system have udev rules?Where should "50-usb-tinymonitor.rules" be added to the windows10 system?

ERROR: No backend available
Make sure to add the udev rule 50-usb-tinymonitor.rules to /etc/udev/rules.d and reload & restart udev.
Also Re-connect the device

[abhra0897]

You need to install libusb-win32 using zadig. Steps are mentioned here: https://github.com/abhra0897/stm32_tiny_monitor/blob/master/host_python_scripts/README.md.

udev rule 50-usb-tinymonitor.rules is for linux only. I'll change the error message for Windows.

[abhra0897]

From the README:

1. Download zadig from https://zadig.akeo.ie/
2. Plugin the device and run zadig.
3. Select the device named "display" from the first dropdown. Make sure the USB ID shows: CAFE CEAF
4. Select "libusb-win32" driver from the right drop down. Then click "Install Driver" button.
5. It should take some time. After installation done, the display should show "USB connected. Config is set..."
6. Run the host software.

[38293312]

From the README:

1. Download zadig from https://zadig.akeo.ie/
2. Plugin the device and run zadig.
3. Select the device named "display" from the first dropdown. Make sure the USB ID shows: CAFE CEAF
4. Select "libusb-win32" driver from the right drop down. Then click "Install Driver" button.
5. It should take some time. After installation done, the display should show "USB connected. Config is set..."
6. Run the host software.

zadig has installed the "libusb-win32" driver. Starting start_host.py shows

[abhra0897]

You closed this issue, does that mean that you have solved it?

If not, did you try either of these after installing libusb-win32:

1. Run slow host , and see if it's giving the same error about "no backend available".
2. Recompiling the .pyx using cython and then run fast host.

[38293312]

You closed this issue, does that mean that you have solved it?

If not, did you try either of these after installing libusb-win32:

1. Run slow host , and see if it's giving the same error about "no backend available".
2. Recompiling the .pyx using cython and then run fast host.

Thanks a lot for your help! The problem is not solved, I run SLOW HOST is the same result!

use cython to recompile the .pyx file and the following problem occurs

[38293312]

Modifying the "fast_host.pyx" file "cpdef" to "cdef" can compile and pass, but running the host "start_host.py" still has the following problems

[abhra0897]

For me, the issue of "No backend available" was solved by installing libusb driver. In your case, libusb is working because the USB enumeration is successful. That's why the device display is showing "USB connected... Config is set" message.

Why is pyusb still not finding libusb (the backend), is a mystery. I'll try to dig deeper into it this weekend.