Arduino for STM32

Thanks, but who knows what's wihi? why not plane English and some elaboration?

As was suggested by mrburnette, I downloaded the https://github.com/stm32duino/Arduino_Core_STM32.
I am not sure on how to run it on Windows. I did not find any exe to launch the Arduino among the files.
Shall I somehow merge it with an existing Arduini IDE?
Once I get it up and running, I will ...

OK. Now i am totally confused.
As I originally wrote, I have an old complex Maple program that was running for years on Maple r5 board that is now dead.
I want now to make it run on STM32_Smart board (ST32F103C8, resembles the Blue Pill). I have the original Maple IDE 0.0.12 (Arduino 018) version ...

Yes, my Maple had an external USB to USART (Silicon labs) that was built-in in the same box. I did not look in the box, and after years, I forgot all about it.
When I first looked at the STM32 board's spec and found there was a built-in USB, I did not realize (actually, didn't think about it at all ...

Took me some time to test and reply (was busy with my tractor fuel injection pump problem...), but after some thinking I realized that the STM32F103 built-in USB can never be used in an application like mine, when real-time data is supposed to be continuously and unattended sent up to a host ...

While trying to port and run my old Maple program using Arduino IDE and STM32_Smart board, I noticed one significant difference between the Arduino Atmel (AVR) and the STM32 board: While on Arduino the reset command resets the program only, the STM32_Smart resets also the COM port .
This becomes an ...

Indeed, the board I use is the one shown in the previous reply.
I did use the Generic STM32F103C, Variant C8, but I did not get upload to be Maple DFU Bootloader 2.0. It is rather "STM32duino bootloader"
I installed the Maple DFU Driver and Maple Serial Driver. (STM32 Maple DFU Drivers, _STM_COM ...

Thaks stevestrong and others,

As I indicated, my current problem is not with the program errors, (some will be gone, with the other I will cope later) but rather with the STM32_Smart board setup.
That board is probably very similar to the Blue Pill, but it does not behave exactly the same.
My ...

Thanks for the help.

It is clear that neither the computer nor the board know Maple, thus the assigned name to the port was set by the board's uploaded boot loader software.
If the software I uploaded (drivers and libraries) is for the Maple Mini, as indicated, it is not what I need. My program ...

Thanks.
While it usually is true that compile errors are not related to the bootloader, assuming we have the correct drivers and configuration to the MCU.
As I wrote, I suspect that I did not load the correct drivers to the board I have.
There are many options for various devices and drivers ...