RTEMS | bsps/arm/stm32f4: Make printk() independent of the console driver. (!1518)

[Catalin Miron (@catalin)]

Catalin Miron commented on a discussion on bsps/arm/stm32f4/console/console-config.c: https://gitlab.rtems.org/rtems/rtos/rtems/-/merge_requests/1518#note_160439

 > +
 > +static int stm32f4_poll_char(void)
 > +{
 > +  if (PORT_COUNT == 0) {
 > +    return -1;
 > +  }
 > +  return stm32f4_usart_read_polled((int) Console_Port_Minor);
 >  }
 > +BSP_output_char_function_type BSP_output_char = stm32f4_output_char_init_early;
 >  
 > -BSP_output_char_function_type BSP_output_char = output_char;
 > +BSP_polling_getchar_function_type BSP_poll_char = stm32f4_poll_char;
 >  
 > -BSP_polling_getchar_function_type BSP_poll_char = NULL;
 > +RTEMS_SYSINIT_ITEM(
 > +  stm32f4_output_char_init,

If you don't want to output first, and maybe wait for input before writing, then the UART won't be initialezed during poll, that's why I added this. Also if we remove the `stm32f4_output_char_init_early` and keep only the `RTEMS_SYSINIT_ITEM`, then if there are issues/faults during system init before `RTEMS_SYSINIT_BSP_START`, you won't see anyting printed out. Do you think there is a better approach for this?

-- 
View it on GitLab: https://gitlab.rtems.org/rtems/rtos/rtems/-/merge_requests/1518#note_160439
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