Arduino for STM32

I managed to solve the problem, for some reason Wire.begin() must be called before Serial.begin(), I also had to reset the SDA and SCL pins to PB9 and PB8.

My code was like this:

#include <Wire.h>

void setup()
{
Wire.setSDA(PB9);
Wire.setSCL(PB8);
Wire.begin();
Serial.begin(9600);
Serial ...

First of all sorry for my english.
I'm trying to use the Arduino Wire library for the Nucleo F446RE board (STM32 boards groups 2.2.0), but I don't get any signal on the SDA and SCL, both have pullup resistors (I've tested 10k, 1k, 4k7).
I've already tried to configure the SDA and SCL pins with Wire ...