Arduino for STM32

On the blue pill where LSE didn't work, it started working for me yesterday. No idea what changed. Anyway, I rewrote a bunch of the LSE init code to have a timeout so that it doesn't hang on failure (for my use case, it's not a big deal if sometimes the clock doesn't work, but it is unfortunate if t...

It looks like I have two types of clones at home. One type hangs when you start LSE, but keeps RTC memory if you pull the power supply (with VBAT connected). The other type hangs when you start LSI, and works with LSE, but loses RTC memory if you pull the power supply (with VBAT connected). It does ...

I switched to LSE and that works. However, it seems that clock data (both time and stuff stored in the storage registers) disappears after I pull the USB plug, even if I have 3.3V hooked up to the VBat pin. Any suggestions? I think what I have is a CS32F103C8T6.

I have a bunch of recent Blue Pills, no doubt stm clones, which hang when I call rtc_init(RTCSEL_LSI). Has anyone got any idea on whether clones have a working internal RC oscillator clock, and if so, how one activates it? RTCSEL_LSE seems to work fine.

Two updates: 1. If you have a mouse plugged into a keyboard, then the keyboard's power button (which I can't get working on Windows in a useful way) emulates the mouse right button, so you can use a one-button Apple mouse with a PC. 2. A 3D printable case is here: https://www.thingiverse.com/thing:5...

In case anybody is interested, I ported Szymon Lopaciuk's adb2usb project to use the libmaple stm32f1 core and my USBComposite library, as well as optimizing it a little, and making the timing work better on counterfeit blue pills (using CYCCNT instead of delayMicroseconds(), since delayMicroseconds...

BTW, does anybody here own a GameCube USB adapter, either a Nintendo or a Mayflash one? If so, would they be able to send me a dump of its USB HID data (either with https://github.com/todbot/win-hid-dump or with https://www.systutorials.com/docs/linux ... bhid-dump/)?

I have added Switch controller emulation to my massive GameCube controller adapter project: https://github.com/arpruss/GameControllersSTM32 The project now lets you use a GameCube controller and/or a Wii Nunchuck as an XBox360 controller, a variety of various binds of standard joystick based control...

I've just added a Nintendo Switch Controller to the library. It's pretty straightforward to use. It's based on the HORIPAD USB descriptor because the Switch Pro Controller is too complicated. As a result, it doesn't support gyros, and the joystick resolution is 8-bit instead of 16-bit (which is fine...

If all you want is a single serial stream over USB, you should just use Serial, instead of USBComposite. USBComposite is overkill for that.