Add generic F411Rx variant

[MCUdude]

This pinout is more or less identical to the F401Rx pinout, except for more peripherals. It follows the same pin style as the F401Rx variant.

If an external clock/oscillator is not preset, it will automatically use its own internal oscillator.

[MCUdude]

Seems like STm32F411RC isn't supported in the core files. Is this something that can be fixed relatively easily?

Build HY_TinySTM103TB (42/95)... 
  --> Generic_F401RE SUCESS
  --> Generic_F411RC FAILED
In file included from /home/travis/.arduino15/packages/STM32/hardware/stm32/*/cores/arduino/stm32/stm32_def.h:34,
                 from /home/travis/.arduino15/packages/STM32/hardware/stm32/*/cores/arduino/stm32/clock.h:43,
                 from /home/travis/.arduino15/packages/STM32/hardware/stm32/*/cores/arduino/wiring_time.h:23,
                 from /home/travis/.arduino15/packages/STM32/hardware/stm32/*/cores/arduino/wiring.h:38,
                 from /home/travis/.arduino15/packages/STM32/hardware/stm32/*/cores/arduino/Arduino.h:32,
                 from /tmp/BuildOutput_2020-01-06_14-46-42/Generic_F411RC/sketch/BareMinimum.ino.cpp:1:
/home/travis/.arduino15/packages/STM32/hardware/stm32/*/system/Drivers/CMSIS/Device/ST/STM32F4xx/Include/stm32f4xx.h:191:3: error: #error "Please select first the target STM32F4xx device used in your application (in stm32f4xx.h file)"
  191 |  #error "Please select first the target STM32F4xx device used in your application (in stm32f4xx.h file)"
      |   ^~~~~
In file included from /home/travis/.arduino15/packages/STM32/hardware/stm32/*/cores/arduino/board.h:16,
                 from /home/travis/.arduino15/packages/STM32/hardware/stm32/*/cores/arduino/wiring.h:41,
                 from /home/travis/.arduino15/packages/STM32/hardware/stm32/*/cores/arduino/Arduino.h:32,
                 from /tmp/BuildOutput_2020-01-06_14-46-42/Generic_F411RC/sketch/BareMinimum.ino.cpp:1:
/home/travis/.arduino15/packages/STM32/hardware/stm32/*/cores/arduino/stm32/rtc.h:94:2: error: #error "Unknown Family - unknown synchronous prescaler"
   94 | #error "Unknown Family - unknown synchronous prescaler"
      |  ^~~~~
exit status 1

[fpistm]

Seems like STm32F411RC isn't supported in the core files. Is this something that can be fixed relatively easily?

This simply means you didn't set the correct product_line:

- GenF4.menu.pnum.Generic_F411RC.build.product_line=STM32F411xC
+ GenF4.menu.pnum.Generic_F411RC.build.product_line=STM32F411xE

[MCUdude]

This simply means you didn't set the correct product_line

I see. A fix is on its way! Otherwise, does it look OK?

[MCUdude]

Should be OK now. Now everything is only one commit too.

[fpistm]

LGTM

[fpistm]

1 astyle issue to fix.

[MCUdude]

I'm sorry, should be fixed now.

[fpistm]

I saw you last change, I do not check those comments, the reference is the PeripheralPins.c file which reference all the possible value, that's why it is important to have it up to date and for the dedicated MCU version.

[MCUdude]

I was looking through some source files for the STM32F411Rx series when I discovered that I had done a mistake when creating the table in variant.h. The contents of PeripheralPins.c is OK. I just find it annoying when comments like this don't match the actual source.

I went through and compared everything in variant.h and PeripheralPins.c to make sure there are no other mistakes. I don't think there are.

[MCUdude]

I see this is left open. Anything else that should be changed/fixed?