abhra0897 / stm32_tiny_monitor Goto Github PK

A tiny external monitor for PC using STM32 and ST7789. Connects to PC over USB and displays the captured screen on ST7789 (240x240) display.

Makefile 1.50% C 95.64% HTML 0.01% Assembly 0.07% Perl 1.86% Python 0.79% Shell 0.05% Cython 0.08%

stm32 stm32f103 usb libopencm3 bluepill st7789 display

stm32_tiny_monitor's Introduction

STM32 Tiny Monitor

A super tiny monitor for your PC, suitable for your pet ant.

A python script sends the captured screen over USB to the STM32 microcontroller, then that data is displayed on ST7789 display. FPS is not that high, but I made it good enough after several optimizations.

I made this project because I'm learning USB now and this is a fun project to practice USB stuffs. I still know almost nothing about USB. To get started, follow this tutorial: https://medium.com/@manuel.bl/usb-for-microcontrollers-part-1-basic-usb-concepts-519a33372cc9

Parts:

STM32F103 MCU (Bluepill)
ST7789 SPI Display (240x240 resolution)

Pin mapping:

ST7789	STM32
SDA	PA7
SCL	PA5
RESETn	PA4
D/Cn	PA2
BLK	PA3 (unused)

How to use:

Compile the firmware and flash the microcontroller
Follow the instruction in host_python_scripts folder to run the host software.
Connect microcontroller to PC using USB cable. Host software will start the stream.
Enjoy your tiny monitor :)

Demo:

TODO:

Optimize the device (mcu) firmware. Buffer the incoming packets befoe sending to SPI bus.
Write host software in C/C++ to get higher performance

Feel free to modify the code and do whatever you want with this useless project.

stm32_tiny_monitor's People

Contributors

Stargazers

Watchers

Forkers

minhngocha skylin008 limon93 riconec jatin1o1 ghosoft ohki-ki kozlov-dev xuxiandi jobitjoseph megaboy1024 tem4a tuanna89 koson spcrxj tongshu-52program johnpwsharp

stm32_tiny_monitor's Issues

Host software startup process and Display driver issues

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

Please help me, thanks!

Speed

What is the bottleneck? I thought that these displays could refresh faster! And stm32 has JPEG codec.

fast_host.py and slow_host.py don't work on Arch Linux

fast_host.py

------------- [ initialize ] -------------

Device not found... Connect device
Device Found!!
Setting device configuration...
ERROR: USBError occured. Re-connect the device...

---------------- [ end ] ----------------


------------- [ handshake ] -------------

ERROR: USBError occured. Re-connect the device...

---------------- [ end ] ----------------


------------- [ stream start ] -------------

Streaming started...
Traceback (most recent call last):
  File "/home/enginar/git-repos/stm32_tiny_monitor/host_python_scripts/fast_host/start_host.py", line 1, in <module>
    import fast_host
  File "fast_host.pyx", line 146, in init fast_host
    initialize()
  File "fast_host.pyx", line 141, in fast_host.initialize
    stream_out(usb_device)
  File "fast_host.pyx", line 101, in fast_host.stream_out
    img = Image.frombytes('RGB', (w, h), sct.grab(monitor).rgb)                 # <-- mss is way fater than pyautogui
  File "/usr/lib/python3.10/site-packages/mss/base.py", line 88, in grab
    return self._grab_impl(monitor)
  File "/usr/lib/python3.10/site-packages/mss/linux.py", line 446, in _grab_impl
    ximage = self.xlib.XGetImage(
  File "/usr/lib/python3.10/site-packages/mss/linux.py", line 191, in validate
    raise ScreenShotError(err, details=details)
mss.exception.ScreenShotError: XGetImage() failed
~/git-repos/stm32_tiny_monitor/host_python_scripts/f

slow_host.py

------------- [ initialize ] -------------

TinyMonitor Found... :)
Setting device configuration...
ERROR: USBError occured. Re-connect the device...

---------------- [ end ] ----------------


------------- [ handshake ] -------------

ERROR: USBError occured. Re-connect the device...

---------------- [ end ] ----------------


------------- [ stream start ] -------------

Streaming started...
Traceback (most recent call last):
  File "/home/enginar/git-repos/stm32_tiny_monitor/host_python_scripts/slow_host/host.py", line 144, in <module>
    initialize()
  File "/home/enginar/git-repos/stm32_tiny_monitor/host_python_scripts/slow_host/host.py", line 139, in initialize
    stream_out(usb_device)
  File "/home/enginar/git-repos/stm32_tiny_monitor/host_python_scripts/slow_host/host.py", line 99, in stream_out
    img = Image.frombytes('RGB', (w, h), sct.grab(monitor).rgb)                 # <-- mss is way fater than pyautogui
  File "/usr/lib/python3.10/site-packages/mss/base.py", line 88, in grab
    return self._grab_impl(monitor)
  File "/usr/lib/python3.10/site-packages/mss/linux.py", line 446, in _grab_impl
    ximage = self.xlib.XGetImage(
  File "/usr/lib/python3.10/site-packages/mss/linux.py", line 191, in validate
    raise ScreenShotError(err, details=details)
mss.exception.ScreenShotError: XGetImage() failed

Discussing about ESP32 C3 support?

ESP32-C3 is a single-core, 32-bit, RISC-V-based MCU with 400KB of SRAM, which is capable of running at 160MHz. It has integrated 2.4 GHz Wi-Fi and Bluetooth 5 (LE) with a long-range support. It has 22 programmable GPIOs with support for ADC, SPI, UART, I2C, I2S, RMT, TWAI, and PWM.

Official introduction address

https://www.espressif.com/en/news/ESP32_C3