how to add another STM32 Board

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#define STM32F3xx // Change for your device
#ifdef STM32F3xx
#include "stm32f3xx_hal.h"
#include "stm32f3xx_hal_uart.h"
#endif /* STM32F3xx /
#ifdef STM32F4xx
#include "stm32f4xx_hal.h"
#include "stm32f4xx_hal_uart.h"
#endif / STM32F4xx /
#ifdef STM32F7xx
#include "stm32f7xx_hal.h"
#include "stm32f7xx_hal_uart.h"
#endif / STM32F7xx */

This a piece of code from STM32Hardware header file, how to add stm32f103 microcontroller ? please guide

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I am using CubeIDE

[mink007]

I am assuming you have generated the boiler plate code for your STM32 project in STM32CubeIDE.

In the STM32Hardware.h simply add these lines:

#ifdef STM32F1xx
#include "stm32f1xx_hal.h"
#include "stm32f1xx_hal_uart.h"
#endif

remove this line "#define STM32F3xx // Change for your device"