Undefined reference to Serial2 after updating from 2.1.0 to 2.3.0

[Bambofy]

Describe the bug
In previous versions of stm23duino I could reference the hardware Serial2 in my project, but after upgrading from 2.1.0 to 2.3.0 the compiler can no longer locate the Serial2 definition.

Expected behavior
The Serial2 definition should be defined during compilation but it doesn't happen.

Screenshots

Desktop (please complete the following information):

• OS: Windows
• Arduino IDE version: 2.0
• STM32 core version: 2.3
• Upload method: SWD
  

Board (please complete the following information):

• Name: Nucleo-64 L452RE

Additional context
I think that the "-DENABLE_HWSERIAL2" might have fixed this problem last time, but it no longer works.

hal_conf_extra.h

#define HAL_SAI_MODULE_ENABLED
#define HAL_TIM_MODULE_ENABLED
#define USE_FULL_ASSERT
#define HAL_ADC_MODULE_ENABLED
#define HAL_MODULE_ENABLED
#define HAL_MMC_MODULE_ENABLED
#define HAL_SD_MODULE_ENABLED
#define HAL_GPIO_MODULE_ENABLED
#define HAL_EXTI_MODULE_ENABLED
#define HAL_I2C_MODULE_ENABLED
#define HAL_DMA_MODULE_ENABLED
#define HAL_RCC_MODULE_ENABLED
#define HAL_FLASH_MODULE_ENABLED
#define HAL_PWR_MODULE_ENABLED
#define HAL_CORTEX_MODULE_ENABLED
#define HAL_UART_MODULE_ENABLED
#define HAL_RTC_MODULE_ENABLED

build_opt.h

-DHAL_MODULE_ENABLED
-DHAL_SAI_MODULE_ENABLED
-DHAL_TIM_MODULE_ENABLED
-DHAL_ADC_MODULE_ENABLED
-DHAL_MMC_MODULE_ENABLED
-DHAL_SD_MODULE_ENABLED
-DHAL_GPIO_MODULE_ENABLED
-DHAL_EXTI_MODULE_ENABLED
-DHAL_I2C_MODULE_ENABLED
-DHAL_DMA_MODULE_ENABLED
-DHAL_RCC_MODULE_ENABLED
-DHAL_FLASH_MODULE_ENABLED
-DHAL_PWR_MODULE_ENABLED
-DHAL_CORTEX_MODULE_ENABLED
-DHAL_UART_MODULE_ENABLED
-DHAL_RTC_MODULE_ENABLED
-DENABLE_HWSERIAL2

Thanks

• Richard

[fpistm]

Hi @Bambofy
default Serial is SerialLP1 for this board not Serial2 since 2.0.0. With previous version it was Serial2 but move to SerialLP1 as the same pins can manage both IP and then use it for Low power.

Arduino_Core_STM32/variants/STM32L4xx/L452RC(I-T-Y)_L452RE(I-T-Y)x(P)_L462RE(I-T-Y)/variant_NUCLEO_L452RE.h

Line 124 in 280efe1

#define SERIAL_UART_INSTANCE 101 //Connected to ST-Link

About build_opt.h there is a regression with 2.3.0 that could explain why it does not work. It will be fixed with 2.4.0.

So instead of using Serial2 use SerialLP1 or better Serial which will be mapped on the correct instance.