Arduino for STM32

Yes thank you for the tip. I was able to come up with this code that works:

#include <SoftwareSerial.h>

SoftwareSerial myserial(PA7, PA8); // RX, TX

uint32_t WriteRegisterValue = 254;
uint32_t ReadRegisterValue;


void setup() {
myserial.begin(9600);
delay (1000);
myserial.println("test ...

Yes, from page 25 of the data sheet:

The device embeds an RTC and five 32-bit backup registers, located in the RTC domain of the silicon die.

Thank you.

I just uploaded the same code to a Blue Pill and it works. I believe it's an issue with the implementation of the backup registers with the STM32G030F6P6

I'm trying to access the backup registers of the STM32G030F6P6 with the functions in backup.h https://github.com/stm32duino/Arduino_Core_STM32/blob/main/cores/arduino/stm32/backup.h

This is the code:

#include <SoftwareSerial.h>

SoftwareSerial myserial(PA7, PA8); // RX, TX

uint32_t ...