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Ameba AMB23 I2C SSD1306 OLED display not work
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I can work with AMB21 + I2C SSD1306 OLED display ( 128 x 32 ) | |
but when I change DEV board , from AMB21 to AMB23 , | |
This SSD OLED display is no display , | |
the arduino ino code is same , | |
please advice how to solve it . | |
Thanks , Armin Lin , 2023 0830 11:49AM | |
my codes as below : | |
pin connectin betweenn AMB23 & SSD1306 oled (128x32) , by I2C | |
AMB23 ( GND ) <------------------------> OLED I2C display ( GND ) | |
AMB23 ( 3V3 ) <------------------------> OLED I2C display ( VCC ) | |
AMB23 (PA31 , I2C_SCL(a) , pin 22) <---> OLED I2C display ( SCL ) | |
AMB23 (PB0 , I2C_SDA(a) pin 0) <------> OLED I2C display ( SDA ) | |
The ino code is in below. |
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#include <SPI.h> | |
#include <Wire.h> | |
#include <Adafruit_GFX.h> | |
#include <Adafruit_SSD1306.h> | |
#define SCREEN_WIDTH 128 // OLED display width, in pixels | |
#define SCREEN_HEIGHT 32 // OLED display height, in pixels | |
// Declaration for an SSD1306 display connected to I2C (SDA, SCL pins) | |
// The pins for I2C are defined by the Wire-library. | |
// On an arduino UNO: A4(SDA), A5(SCL) | |
// On an arduino MEGA 2560: 20(SDA), 21(SCL) | |
// On an arduino LEONARDO: 2(SDA), 3(SCL), ... | |
#define OLED_RESET -1 // Reset pin # (or -1 if sharing Arduino reset pin) | |
#define SCREEN_ADDRESS 0x3C ///< See datasheet for Address; 0x3D for 128x64, 0x3C for 128x32 | |
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET); | |
#define NUMFLAKES 10 // Number of snowflakes in the animation example | |
#define LOGO_HEIGHT 16 | |
#define LOGO_WIDTH 16 | |
static const unsigned char PROGMEM logo_bmp[] = | |
{ 0b00000000, 0b11000000, | |
0b00000001, 0b11000000, | |
0b00000001, 0b11000000, | |
0b00000011, 0b11100000, | |
0b11110011, 0b11100000, | |
0b11111110, 0b11111000, | |
0b01111110, 0b11111111, | |
0b00110011, 0b10011111, | |
0b00011111, 0b11111100, | |
0b00001101, 0b01110000, | |
0b00011011, 0b10100000, | |
0b00111111, 0b11100000, | |
0b00111111, 0b11110000, | |
0b01111100, 0b11110000, | |
0b01110000, 0b01110000, | |
0b00000000, 0b00110000 }; | |
void setup() { | |
Serial.begin(115200); | |
// SSD1306_SWITCHCAPVCC = generate display voltage from 3.3V internally | |
if(!display.begin(SSD1306_SWITCHCAPVCC, SCREEN_ADDRESS)) { | |
Serial.println(F("SSD1306 allocation failed")); | |
for(;;); // Don't proceed, loop forever | |
} | |
// Show initial display buffer contents on the screen -- | |
// the library initializes this with an Adafruit splash screen. | |
display.display(); | |
delay(2000); // Pause for 2 seconds | |
// Clear the buffer | |
display.clearDisplay(); | |
// show hello | |
showhello(); | |
// Clear the buffer | |
display.clearDisplay(); | |
// Draw a single pixel in white | |
display.drawPixel(10, 10, SSD1306_WHITE); | |
// Show the display buffer on the screen. You MUST call display() after | |
// drawing commands to make them visible on screen! | |
display.display(); | |
delay(2000); | |
// display.display() is NOT necessary after every single drawing command, | |
// unless that's what you want...rather, you can batch up a bunch of | |
// drawing operations and then update the screen all at once by calling | |
// display.display(). These examples demonstrate both approaches... | |
testdrawline(); // Draw many lines | |
Serial.println("Draw many lines"); | |
delay(2000); | |
testdrawrect(); // Draw rectangles (outlines) | |
Serial.println("Draw rectangles (outlines)"); | |
delay(2000); | |
testfillrect(); // Draw rectangles (filled) | |
Serial.println("Draw rectangles (filled)"); | |
delay(2000); | |
testdrawcircle(); // Draw circles (outlines) | |
Serial.println("Draw circles (outlines)"); | |
delay(2000); | |
testfillcircle(); // Draw circles (filled) | |
Serial.println("Draw circles (filled)"); | |
delay(2000); | |
testdrawroundrect(); // Draw rounded rectangles (outlines) | |
Serial.println("Draw rounded rectangles (outlines)"); | |
delay(2000); | |
testfillroundrect(); // Draw rounded rectangles (filled) | |
Serial.println("Draw rounded rectangles (filled)"); | |
delay(2000); | |
testdrawtriangle(); // Draw triangles (outlines) | |
Serial.println("Draw triangles (outlines)"); | |
delay(2000); | |
testfilltriangle(); // Draw triangles (filled) | |
Serial.println("Draw triangles (filled)"); | |
delay(2000); | |
testdrawchar(); // Draw characters of the default font | |
Serial.println("Draw characters of the default font"); | |
delay(2000); | |
testdrawstyles(); // Draw 'stylized' characters | |
Serial.println("Draw 'stylized' characters"); | |
delay(2000); | |
testscrolltext(); // Draw scrolling text | |
Serial.println("raw scrolling text"); | |
delay(2000); | |
testdrawbitmap(); // Draw a small bitmap image | |
Serial.println("Draw a small bitmap image"); | |
delay(2000); | |
// Invert and restore display, pausing in-between | |
display.invertDisplay(true); | |
delay(1000); | |
display.invertDisplay(false); | |
delay(1000); | |
//testanimate(logo_bmp, LOGO_WIDTH, LOGO_HEIGHT); // Animate bitmaps | |
} | |
void loop() { | |
testdrawchar(); // Draw characters of the default font | |
Serial.println("Draw characters of the default font"); | |
delay(2000); | |
testdrawstyles(); // Draw 'stylized' characters | |
Serial.println("Draw 'stylized' characters"); | |
delay(2000); | |
testscrolltext(); // Draw scrolling text | |
Serial.println("raw scrolling text"); | |
delay(2000); | |
testdrawbitmap(); // Draw a small bitmap image | |
Serial.println("Draw a small bitmap image"); | |
delay(2000); | |
} | |
void testdrawline() { | |
int16_t i; | |
display.clearDisplay(); // Clear display buffer | |
for(i=0; i<display.width(); i+=4) { | |
display.drawLine(0, 0, i, display.height()-1, SSD1306_WHITE); | |
display.display(); // Update screen with each newly-drawn line | |
delay(1); | |
} | |
for(i=0; i<display.height(); i+=4) { | |
display.drawLine(0, 0, display.width()-1, i, SSD1306_WHITE); | |
display.display(); | |
delay(1); | |
} | |
delay(250); | |
display.clearDisplay(); | |
for(i=0; i<display.width(); i+=4) { | |
display.drawLine(0, display.height()-1, i, 0, SSD1306_WHITE); | |
display.display(); | |
delay(1); | |
} | |
for(i=display.height()-1; i>=0; i-=4) { | |
display.drawLine(0, display.height()-1, display.width()-1, i, SSD1306_WHITE); | |
display.display(); | |
delay(1); | |
} | |
delay(250); | |
display.clearDisplay(); | |
for(i=display.width()-1; i>=0; i-=4) { | |
display.drawLine(display.width()-1, display.height()-1, i, 0, SSD1306_WHITE); | |
display.display(); | |
delay(1); | |
} | |
for(i=display.height()-1; i>=0; i-=4) { | |
display.drawLine(display.width()-1, display.height()-1, 0, i, SSD1306_WHITE); | |
display.display(); | |
delay(1); | |
} | |
delay(250); | |
display.clearDisplay(); | |
for(i=0; i<display.height(); i+=4) { | |
display.drawLine(display.width()-1, 0, 0, i, SSD1306_WHITE); | |
display.display(); | |
delay(1); | |
} | |
for(i=0; i<display.width(); i+=4) { | |
display.drawLine(display.width()-1, 0, i, display.height()-1, SSD1306_WHITE); | |
display.display(); | |
delay(1); | |
} | |
delay(2000); // Pause for 2 seconds | |
} | |
void testdrawrect(void) { | |
display.clearDisplay(); | |
for(int16_t i=0; i<display.height()/2; i+=2) { | |
display.drawRect(i, i, display.width()-2*i, display.height()-2*i, SSD1306_WHITE); | |
display.display(); // Update screen with each newly-drawn rectangle | |
delay(1); | |
} | |
delay(2000); | |
} | |
void testfillrect(void) { | |
display.clearDisplay(); | |
for(int16_t i=0; i<display.height()/2; i+=3) { | |
// The INVERSE color is used so rectangles alternate white/black | |
display.fillRect(i, i, display.width()-i*2, display.height()-i*2, SSD1306_INVERSE); | |
display.display(); // Update screen with each newly-drawn rectangle | |
delay(1); | |
} | |
delay(2000); | |
} | |
void testdrawcircle(void) { | |
display.clearDisplay(); | |
for(int16_t i=0; i<max(display.width(),display.height())/2; i+=2) { | |
display.drawCircle(display.width()/2, display.height()/2, i, SSD1306_WHITE); | |
display.display(); | |
delay(1); | |
} | |
delay(2000); | |
} | |
void testfillcircle(void) { | |
display.clearDisplay(); | |
for(int16_t i=max(display.width(),display.height())/2; i>0; i-=3) { | |
// The INVERSE color is used so circles alternate white/black | |
display.fillCircle(display.width() / 2, display.height() / 2, i, SSD1306_INVERSE); | |
display.display(); // Update screen with each newly-drawn circle | |
delay(1); | |
} | |
delay(2000); | |
} | |
void testdrawroundrect(void) { | |
display.clearDisplay(); | |
for(int16_t i=0; i<display.height()/2-2; i+=2) { | |
display.drawRoundRect(i, i, display.width()-2*i, display.height()-2*i, | |
display.height()/4, SSD1306_WHITE); | |
display.display(); | |
delay(1); | |
} | |
delay(2000); | |
} | |
void testfillroundrect(void) { | |
display.clearDisplay(); | |
for(int16_t i=0; i<display.height()/2-2; i+=2) { | |
// The INVERSE color is used so round-rects alternate white/black | |
display.fillRoundRect(i, i, display.width()-2*i, display.height()-2*i, | |
display.height()/4, SSD1306_INVERSE); | |
display.display(); | |
delay(1); | |
} | |
delay(2000); | |
} | |
void testdrawtriangle(void) { | |
display.clearDisplay(); | |
for(int16_t i=0; i<max(display.width(),display.height())/2; i+=5) { | |
display.drawTriangle( | |
display.width()/2 , display.height()/2-i, | |
display.width()/2-i, display.height()/2+i, | |
display.width()/2+i, display.height()/2+i, SSD1306_WHITE); | |
display.display(); | |
delay(1); | |
} | |
delay(2000); | |
} | |
void testfilltriangle(void) { | |
display.clearDisplay(); | |
for(int16_t i=max(display.width(),display.height())/2; i>0; i-=5) { | |
// The INVERSE color is used so triangles alternate white/black | |
display.fillTriangle( | |
display.width()/2 , display.height()/2-i, | |
display.width()/2-i, display.height()/2+i, | |
display.width()/2+i, display.height()/2+i, SSD1306_INVERSE); | |
display.display(); | |
delay(1); | |
} | |
delay(2000); | |
} | |
void testdrawchar(void) { | |
display.clearDisplay(); | |
display.setTextSize(1); // Normal 1:1 pixel scale | |
display.setTextColor(SSD1306_WHITE); // Draw white text | |
display.setCursor(0, 0); // Start at top-left corner | |
display.cp437(true); // Use full 256 char 'Code Page 437' font | |
// Not all the characters will fit on the display. This is normal. | |
// Library will draw what it can and the rest will be clipped. | |
for(int16_t i=0; i<256; i++) { | |
if(i == '\n') display.write(' '); | |
else display.write(i); | |
} | |
display.display(); | |
delay(2000); | |
} | |
void testdrawstyles(void) { | |
display.clearDisplay(); | |
display.setTextSize(1); // Normal 1:1 pixel scale | |
display.setTextColor(SSD1306_WHITE); // Draw white text | |
display.setCursor(0,0); // Start at top-left corner | |
display.println(F("Hello, world!")); | |
display.setTextColor(SSD1306_BLACK, SSD1306_WHITE); // Draw 'inverse' text | |
display.println(3.141592); | |
display.setTextSize(2); // Draw 2X-scale text | |
display.setTextColor(SSD1306_WHITE); | |
display.print(F("0x")); display.println(0xDEADBEEF, HEX); | |
display.display(); | |
delay(2000); | |
} | |
void showhello(void) { | |
display.clearDisplay(); | |
display.setTextSize(1); | |
display.setTextColor(BLACK, WHITE); // 'inverted' text | |
display.setCursor(0,15); | |
display.println("Hello world!"); | |
display.display(); | |
delay(2000); | |
display.clearDisplay(); | |
display.setTextSize(1); // Normal 1:1 pixel scale | |
display.setTextColor(SSD1306_WHITE); // Draw white text | |
display.setCursor(15,0); // Start at top-left corner | |
display.println(F("Hello, world!")); | |
display.setTextColor(SSD1306_BLACK, SSD1306_WHITE); // Draw 'inverse' text | |
display.println(3.141592); | |
display.setTextSize(2); // Draw 2X-scale text | |
display.setTextColor(SSD1306_WHITE); | |
display.print(F("0x")); display.println(0xDEADBEEF, HEX); | |
display.display(); | |
delay(2000); | |
} | |
void testscrolltext(void) { | |
display.clearDisplay(); | |
display.setTextSize(2); // Draw 2X-scale text | |
display.setTextColor(SSD1306_WHITE); | |
display.setCursor(10, 0); | |
display.println(F("scroll")); | |
display.display(); // Show initial text | |
delay(100); | |
// Scroll in various directions, pausing in-between: | |
display.startscrollright(0x00, 0x0F); | |
delay(2000); | |
display.stopscroll(); | |
delay(1000); | |
display.startscrollleft(0x00, 0x0F); | |
delay(2000); | |
display.stopscroll(); | |
delay(1000); | |
display.startscrolldiagright(0x00, 0x07); | |
delay(2000); | |
display.startscrolldiagleft(0x00, 0x07); | |
delay(2000); | |
display.stopscroll(); | |
delay(1000); | |
} | |
void testdrawbitmap(void) { | |
display.clearDisplay(); | |
display.drawBitmap( | |
(display.width() - LOGO_WIDTH ) / 2, | |
(display.height() - LOGO_HEIGHT) / 2, | |
logo_bmp, LOGO_WIDTH, LOGO_HEIGHT, 1); | |
display.display(); | |
delay(1000); | |
} | |
#define XPOS 0 // Indexes into the 'icons' array in function below | |
#define YPOS 1 | |
#define DELTAY 2 | |
void testanimate(const uint8_t *bitmap, uint8_t w, uint8_t h) { | |
int8_t f, icons[NUMFLAKES][3]; | |
// Initialize 'snowflake' positions | |
for(f=0; f< NUMFLAKES; f++) { | |
icons[f][XPOS] = random(1 - LOGO_WIDTH, display.width()); | |
icons[f][YPOS] = -LOGO_HEIGHT; | |
icons[f][DELTAY] = random(1, 6); | |
Serial.print(F("x: ")); | |
Serial.print(icons[f][XPOS], DEC); | |
Serial.print(F(" y: ")); | |
Serial.print(icons[f][YPOS], DEC); | |
Serial.print(F(" dy: ")); | |
Serial.println(icons[f][DELTAY], DEC); | |
} | |
for(;;) { // Loop forever... | |
display.clearDisplay(); // Clear the display buffer | |
// Draw each snowflake: | |
for(f=0; f< NUMFLAKES; f++) { | |
display.drawBitmap(icons[f][XPOS], icons[f][YPOS], bitmap, w, h, SSD1306_WHITE); | |
} | |
display.display(); // Show the display buffer on the screen | |
delay(200); // Pause for 1/10 second | |
// Then update coordinates of each flake... | |
for(f=0; f< NUMFLAKES; f++) { | |
icons[f][YPOS] += icons[f][DELTAY]; | |
// If snowflake is off the bottom of the screen... | |
if (icons[f][YPOS] >= display.height()) { | |
// Reinitialize to a random position, just off the top | |
icons[f][XPOS] = random(1 - LOGO_WIDTH, display.width()); | |
icons[f][YPOS] = -LOGO_HEIGHT; | |
icons[f][DELTAY] = random(1, 6); | |
} | |
} | |
} | |
} |
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