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stm32duino:32stm32_main [2018/11/03 18:51]
admin [STM32duino] 		stm32duino:32stm32_main [2020/10/26 16:31]
admin [Links]
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-===== STM32duino ===== +===== STM32duino - Blue Pill F103C8 ===== 
-The STM32duino board is based on the [[https://en.wikipedia.org/wiki/ARM_Cortex-M#Cortex-M3|ARM Cortex M3]] core like the Arduino Duo. The version I use is the [[http://wiki.stm32duino.com/index.php?title=Blue_Pill|Blus Pill]] I bought on E-Bay.\\+The STM32duino board is based on the [[https://en.wikipedia.org/wiki/ARM_Cortex-M#Cortex-M3|ARM Cortex M3]] core like the Arduino Duo. The version I use is the [[http://wiki.stm32duino.com/index.php?title=Blue_Pill|Blus Pill]].\\ 
 +\\ 
 +On Hackaday is a good article about STM32 clones: [[https://hackaday.com/2020/10/22/stm32-clones-the-good-the-bad-and-the-ugly/|STM32-Clones - the good the bad and the ugly]].\\
  
  
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 Unfortunately the board comes with a 10k pullup resistor from D+ to 3.3V (in the schematic it's a 4.7k). That can cause problems on some PCs. Just take the R10 out and replace it with an 1.5k resistor like shown here:\\ Unfortunately the board comes with a 10k pullup resistor from D+ to 3.3V (in the schematic it's a 4.7k). That can cause problems on some PCs. Just take the R10 out and replace it with an 1.5k resistor like shown here:\\
 [[http://wiki.stm32duino.com/index.php?title=Blue_Pill#Hardware_installation]]\\ [[http://wiki.stm32duino.com/index.php?title=Blue_Pill#Hardware_installation]]\\
-One might let the 10k resister untouched and just put a 1.8k in parallel. Between 3.3V and pin A1.\\+One might let the 10k resister untouched and just put a 1.8k in parallel. Between 3.3V and pin A1 (PA12).\\
 <html> <html>
 <a href="http://wiki.stm32duino.com/images/1/1c/BluePillUsbResistor.jpg"> <a href="http://wiki.stm32duino.com/images/1/1c/BluePillUsbResistor.jpg">
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    Debug mode: SWD    Debug mode: SWD
    72MHz work frequency    72MHz work frequency
-   64K flash memory, 20K SRAM+   64K flash memory 
 +   20K SRAM
    2.0-3.6V power, I/O    2.0-3.6V power, I/O
    Reset(POR/PDR)    Reset(POR/PDR)
    8MHz crystal    8MHz crystal
 +   LED on pin PC13
 +
 +----
 +
 +==== Software =====
 +Here is an installation guide here:\\
 +[[http://wiki.stm32duino.com/index.php?title=Installation]]\\
 +and here:\\
 +[[https://github.com/rogerclarkmelbourne/Arduino_STM32/wiki/Installation]]\\
 +Uploading a sketch:\\
 +[[http://wiki.stm32duino.com/index.php?title=Uploading_a_sketch]]\\
 +Debugging with GDB by Hackaday:\\
 +[[https://youtu.be/D-MbC9N5U7o]]\\
  
 ---- ----
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 ---- ----
 +===== I2C over VGA =====
 +One can use the I2C bus from the VGA connector.\\
 +
 +----
 +==== I2C on the VGA Connector ====
 +How to acces the I2C Bus:\\
 +{{:vga_to_i2c.jpg?400|}}\\
 +or use the
 +[[http://paperpcb.dernulleffekt.de/doku.php?id=vga_synthesizer:vga_breakout_board|VGA Breakout Board]].\\
 +
 +---- 
 +==== Workaround ====
 +A workaround for Arch Linux:\\
 +
 +
 +Add the I2C kernel module:\\
 +   $ sudo modprobe i2c-dev
 +Check your I2C devices:\\
 +   $ ls /dev/
 +You should find somthing like:  **i2c-0  i2c-1  i2c-2 ...**\\ 
 +Install the I2C tools:\\
 +   $ sudo pacman -S i2c-tools
 +or on Debian:\\
 +   $ sudo apt-get install -y i2c-tools
 +Find your device:\\
 +   $ i2cdetect -l
 +The result could look like:\\
 +    i2c-1 unknown    i915 gmbus vga                  N/A
 +Looking for an I2C device
 +   $ sudo i2cdetect -y 1
 +It should tell you the address of your I2C device.\\
 +Now you can comunicate to your devices with these commands:\\
 +   $ i2cget
 +   $ i2cset
 +   $ i2cdump
 +
 +
 +
 +==== Links ====
 +  * [[http://flipthatbit.net/2011/04/interfacing-i2c-the-easy-way/]]
 +  * [[http://flipthatbit.net/2011/03/building-a-vga-monitor-ddc2-interface-tests/]]
 +  * [[https://blog.atx.name/twilight-vga-i2c-breakout-board/]]
 +  * [[http://www.righto.com/2018/03/reading-vga-monitors-configuration-data.html]]
 +  * [[http://www.boichat.ch/nicolas/ddcci/method.html]]
 +  * [[http://ddccontrol.sourceforge.net/index.html]]
 +
 +----
 +==== License ====
 +
 +This manuals is made by **Wolfgang Spahn** 2018-20.\\
 +It is licensed under a [[http://creativecommons.org/licenses/by-nc-sa/4.0/"|Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License]].
 +
 +<html>
 +<a rel="license" href="http://creativecommons.org/licenses/by-nc-sa/4.0/"><img alt="Creative Commons License" style="border-width:0" src="https://i.creativecommons.org/l/by-nc-sa/4.0/88x31.png" /></a> 
 +</html>
 +
 +----
 +