Add Generic STM32F103Rx boards

[fpistm]

Four variants available:

• STM32F103R8T6
• STM32F103RBT6
• STM32F103RCT6
• STM32F103RET6

Based on @pkourany work.

If someone can test them this would be fine as I do not have those boards.
Thanks in advance.

Fixes #556

[fpistm]

@enesbcs made some tests.
#556 (comment)

[hamed-ta]

Hi, I can't find the board ID for using STM32F103RCT6 custom board in PIO which loaded Arduino_Core_STM32,

[fpistm]

Well, I can't help on this, I never used PIO and as said in your previous issue here only Arduino IDE is supported.

[hamed-ta]

well, the Arduino IDE doesn't have the basic facilities of an IDE and it's really difficult to work with, so please think of a better IDE such as PIO support.

[fpistm]

well, the Arduino IDE doesn't have the basic facilities of an IDE and it's really difficult to work with, so please think of a better IDE such as PIO support.

Goal of this core is to provide STM32 support in Arduino.
I know Arduino IDE is limited anyway this is the reference IDE. PIO provides support to integrates it so you have to ask there:
https://github.com/platformio/platform-ststm32

[pfeerick]

FYI, to change to the STM32duino on PlatformIO for a board that defaults to using the 'maple' core, just add board_build.core = stm32 to the project platformio.ini configuration file to override that default value.

[hamed-ta]

it seems that the new variants will be included in the next release (Arduino Core for STM32 v1.9.0) right ?

[fpistm]

yes, anyway, I think you can use the git repo. It should be documented in PIO.
@valeros ?

[hamed-ta]

but I can see that the variants (Generic STM32F103R(8/B/C/E)) are added in 1.7.0 release ?!!

[fpistm]

yes those version but the other will be added to the 1.9.0

[fpistm]

Ah, you want use the RC so yes it is already available since 1.7.0. So if it's not work with PIO then ask on PIO support.

[hamed-ta]

Yea, good, I'm asking them... I think they just need to add the right board configuration file to the PIO boards.