Arduino for STM32

Can you try this program on PB8 and PB9 ? I tis working with my stm32f103 only on PB6 and PB7.


#include <SPI.h>
#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>

#define OLED_RESET 4
Adafruit_SSD1306 display(OLED_RESET);

//#if (SSD1306_LCDHEIGHT != 64)
#if (SSD1306 ...

I am using this board and oscilloscope.
Green LED is on PC13

Which program you are using for testing OLED on pins PB10 and PB11?

my address for pins PB6/7 and PB8/9 is 0x3C - using not modify scanner program.

When I upload this code the Green LED on board is flashing and nothing on serial monitor. What are yours scanning results of pins PB10 and PB11?

Because the problem with I2C2 I try using I2C on pins PB8 and PB9 , this program is working on pins PB6 an d PB7 but not on PB8 and PB9 pins. I scanned pins PB8 and PB9 and PB6 an d PB7 and have for both address 0x27.

#include <Wire.h>
#include <LiquidCrystal_I2C.h>

// Set the LCD address to 0x3F ...

// --------------------------------------
// i2c_scanner
//
// Version 1
// This program (or code that looks like it)
// can be found in many places.
// For example on the Arduino.cc forum.
// The original author is not know.
// Version 2, Juni 2012, Using Arduino 1.0.1
// Adapted to be as simple ...

I want to scan I2C2, which is pins PB10 and PB11

I did this way and have an error

// --------------------------------------
// i2c_scanner
//
// Version 1
// This program (or code that looks like it)
// can be found in many places.
// For example on the Arduino.cc forum.
// The original author is not know.
// Version 2, Juni 2012, Using Arduino ...

I changed the name and list is Long = Thanks for hint.

example list does not changed

Can you connect OLED to PB10 and PB11 and tell me the scanner results ?

Look at this program it has ;

#define OLED_RESET 4
Adafruit_SSD1306 display(OLED_RESET);

In instruction is says that 3 wire connection is needed but I using only 2, SDA and SCL


#include <SPI.h>
#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>

#define OLED_RESET 4 ...