Arduino for STM32

Roger's core is used for boards with 12MHZ crystal not 8Mhz.
GD32F103 run at 108Mhz-8Mhz(crystal) not 72-8Mhz.
If you change the xtal on the board for 12Mhz you can use old rogers core.
Blinking will still work regardless of the Xtal used.

Some functions you may need in a project and you cannot find them in arduino.
like:
RCC_DeInit();//In standard STM32 library
NVIC_SystemReset();//CMSIS
and you need to improvise(like bare metal programming) if you work in an Arduino environment.
I like flexibility not to be bound by a specific ...

I don't need help just a discussion.
I don't think is complicated.And I used many times code compiled in Arduino IDE. Working directly with registers. It feels to me faster to write code and easier to understand.Sometimes I combine the bare metal code with direct functions from libmaple
See an ...

Idea:
A topic about using bare metal STM32 programming based on Maple core and its derivatives.It can be compiled in ARduino IDE.Code snippets,what to look for,familiarization with.
I have used many times direct register manipulation in many of my codes.I just wonder if there are some topics on ...

Anybody knows of an 1-wire bootloader for STM32F1?
Using any mcu pin to flash a F1 chip.

simpler.
RCC_BASE->AHBENR |= RCC_AHBENR_DMA1EN ; // Enable clock on DMA1
//--
TIMER2_BASE->DIER = TIMER_DIER_CC3DE ;//Capture/Compare 3 DMA request enable

Lol!
Looks like my core is old.

I use
void enableDebugPorts(void) {
afio_cfg_debug_ports(AFIO_DEBUG_FULL_SWJ);
}
and working

while.
afio_cfg_debug_ports(AFIO_DEBUG_SW_ONLY); is not.
*********************************************************************
edit:
using first

afio_cfg_debug_ports(AFIO ...

Another issue,
While I can connect with STlink with
enableDebugPorts()
It is not very useful because I have JTAG pins in use while SWD pins are not used.
I tried
afio_cfg_debug_ports(AFIO_DEBUG_SW_ONLY); but I get "Cannot connect to the target" message.

Is there some work around, to use with ...

Tested with
enableDebugPorts();
Working like a charm.
Thank you guys.
Best community here.

Ahhh I may have an older version of the core?!
In my boards.txt

genericSTM32F103C.menu.upload_method.serialMethod=Serial
genericSTM32F103C.menu.upload_method.serialMethod.upload.protocol=maple_serial
genericSTM32F103C.menu.upload_method.serialMethod.upload.tool=serial_upload


I thing stevestrong ...