RTEMS 7 stm32f4 console not working

A further refinement is to inherit the arm//stm32f4 BSP to create a Black Pill one:

[arm/blackpill]
  INHERIT = arm/stm32f4
  BUILD_TESTS = False
  STM32F4_ENABLE_USART_2 = 1 
  STM32F4_ENABLE_USART_3 = 0
  STM32F4_HSE_OSCILLATOR = 25000000

I use this in RTEMS Deployment for the AMD K26.

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