No display on SSD 1325 with teensy3.6 - Warnings

Using Arduino Programming Questions
1

Beginner trying to display something on OLED. Getting these warnings and cannot display even a example from a library of SSD 1325.

#include <Wire.h>
#include <SPI.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1325.h>


Adafruit_SSD1325 display(13, 13, 8, 9, 10);




void setup() {
  // put your setup code here, to run once:
  display.begin();
  display.clearDisplay();
  display.setTextSize(1);
  display.setTextColor(WHITE);
  display.setCursor(0,0);
  display.println("Hello World");
  display.display();


}

void loop() {
  // put your main code here, to run repeatedly:
  
}

Here are the warnings:

In file included from C:\Users\Tommy\AppData\Local\Temp\.arduinoIDE-unsaved2023814-14180-nlnuwf.3frqj\sketch_sep14a\sketch_sep14a.ino:5:
c:\Users\Tommy\Documents\Arduino\libraries\Adafruit_SSD1325/Adafruit_SSD1325.h:12: warning: "_BV" redefined
   12 | #define _BV(b) (1 << (b))
      | 
In file included from C:\Users\Tommy\AppData\Local\Arduino15\packages\teensy\hardware\avr\1.58.1\cores\teensy3/wiring.h:39,
                 from C:\Users\Tommy\AppData\Local\Arduino15\packages\teensy\hardware\avr\1.58.1\cores\teensy3/WProgram.h:46,
                 from C:\Users\Tommy\AppData\Local\Temp\arduino\sketches\988F7EE659F7BC5CF65B291836682BF8\pch\Arduino.h:6:
C:\Users\Tommy\AppData\Local\Arduino15\packages\teensy\hardware\avr\1.58.1\cores\teensy3/core_pins.h:47: note: this is the location of the previous definition
   47 | #define _BV(n)          (1<<(n))
      | 
In file included from c:\Users\Tommy\Documents\Arduino\libraries\Adafruit_SSD1325\Adafruit_SSD1325.cpp:42:
c:\Users\Tommy\Documents\Arduino\libraries\Adafruit_SSD1325\Adafruit_SSD1325.h:12: warning: "_BV" redefined
   12 | #define _BV(b) (1 << (b))
      | 
In file included from C:\Users\Tommy\AppData\Local\Arduino15\packages\teensy\hardware\avr\1.58.1\cores\teensy3/wiring.h:39,
                 from C:\Users\Tommy\AppData\Local\Arduino15\packages\teensy\hardware\avr\1.58.1\cores\teensy3/WProgram.h:46,
                 from C:\Users\Tommy\AppData\Local\Temp\arduino\sketches\988F7EE659F7BC5CF65B291836682BF8/pch/Arduino.h:6,
                 from c:\Users\Tommy\Documents\Arduino\libraries\Adafruit_GFX_Library/Adafruit_GFX.h:5,
                 from c:\Users\Tommy\Documents\Arduino\libraries\Adafruit_SSD1325\Adafruit_SSD1325.cpp:41:
C:\Users\Tommy\AppData\Local\Arduino15\packages\teensy\hardware\avr\1.58.1\cores\teensy3/core_pins.h:47: note: this is the location of the previous definition
   47 | #define _BV(n)          (1<<(n))
      |
2

Just a $0.02...
The line below is obviously incorrect, because two first arguments of the constructor can't be the same:

See how the constructor is defined in the library:

 /*!
   * @brief Constructor for SSD1325 display
   * @param SID MOSI (microcontroller out, secondary in) pin
   * @param SCLK Serial clock pin
   * @param DC Data/command pin
   * @param RST Reset pin
   * @param CS Chip-select pin
   */
  Adafruit_SSD1325(int8_t SID, int8_t SCLK, int8_t DC, int8_t RST, int8_t CS)

the first argument should be a MOSI pin, and the second is SCLK

2 Likes
3

The warnings look harmless: the definitions are equivalent - just using a different name for the parameter (n instead of b).

4

I've changed the MOSI argument to 11 and still no display.

5

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