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本帖最后由 topdog 于 2021-3-30 22:34 编辑
确保接线正确,
SCL GPIO5
SDA GPIO4
其次I2C地址0x3C,u8g2和Adafruit SSD1306库。
https://github.com/olikraus/U8g2_Arduino
[pre]#include <Arduino.h>
#include <U8x8lib.h>
#ifdef U8X8_HAVE_HW_SPI
#include <SPI.h>
#endif
//U8X8_SSD1306_128X64_NONAME_HW_I2C u8x8(/* reset=*/ U8X8_PIN_NONE);
U8X8_SSD1306_64X48_ER_HW_I2C u8x8(/* reset=*/ U8X8_PIN_NONE);
void setup(void)
{
u8x8.begin();
u8x8.setPowerSave(0);
}
void loop(void)
{
u8x8.setFont(u8x8_font_chroma48medium8_r);
u8x8.drawString(0, 1, "Hello");
u8x8.drawString(0, 2, "World!");
u8x8.refreshDisplay(); // only required for SSD1606/7
delay(2000);
}[/pre]
需要两个库一起使用:
https://github.com/adafruit/Adafruit_SSD1306
https://github.com/adafruit/Adafruit-GFX-Library/
针对wemos d1的Adafruit SSD1306库:
https://github.com/stblassitude/Adafruit_SSD1306_Wemos_OLED
[pre]#include <SPI.h>
#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
// SCL GPIO5
// SDA GPIO4
#define OLED_RESET 0 // GPIO0
Adafruit_SSD1306 display(OLED_RESET);
#define NUMFLAKES 10
#define XPOS 0
#define YPOS 1
#define DELTAY 2
#define LOGO16_GLCD_HEIGHT 16
#define LOGO16_GLCD_WIDTH 16
static const unsigned char PROGMEM logo16_glcd_bmp[] =
{ B00000000, B11000000,
B00000001, B11000000,
B00000001, B11000000,
B00000011, B11100000,
B11110011, B11100000,
B11111110, B11111000,
B01111110, B11111111,
B00110011, B10011111,
B00011111, B11111100,
B00001101, B01110000,
B00011011, B10100000,
B00111111, B11100000,
B00111111, B11110000,
B01111100, B11110000,
B01110000, B01110000,
B00000000, B00110000 };
#if (SSD1306_LCDHEIGHT != 48)
#error("Height incorrect, please fix Adafruit_SSD1306.h!");
#endif
void setup() {
Serial.begin(9600);
// 默认情况下,我们将从3.3v线内部产生高电压!(整洁!)
display.begin(SSD1306_SWITCHCAPVCC, 0x3C); // 用I2C地址0x3C初始化(对于64x48)
// init done
// 在显示硬件上显示图像缓冲区。
// 因为缓冲区是用Adafruit闪动屏幕初始化的
// 在内部,这将会显示出闪屏。
display.display();
delay(2000);
// 清除缓冲
display.clearDisplay();
// 绘制单个像素
display.drawPixel(10, 10, WHITE);
// Show the display buffer on the hardware.
// NOTE: You _must_ call display after making any drawing commands
// to make them visible on the display hardware!
display.display();
delay(2000);
display.clearDisplay();
// 画很多行
testdrawline();
display.display();
delay(2000);
display.clearDisplay();
// 画长方形
testdrawrect();
display.display();
delay(2000);
display.clearDisplay();
//绘制多个矩形
testfillrect();
display.display();
delay(2000);
display.clearDisplay();
//画mulitple圆圈
testdrawcircle();
display.display();
delay(2000);
display.clearDisplay();
// 画一个白色圆圈,半径为10像素
display.fillCircle(display.width()/2, display.height()/2, 10, WHITE);
display.display();
delay(2000);
display.clearDisplay();
testdrawroundrect();
delay(2000);
display.clearDisplay();
testfillroundrect();
delay(2000);
display.clearDisplay();
testdrawtriangle();
delay(2000);
display.clearDisplay();
testfilltriangle();
delay(2000);
display.clearDisplay();
// 画出字体的前12个字符
testdrawchar();
display.display();
delay(2000);
display.clearDisplay();
// 画滚动文本
testscrolltext();
delay(2000);
display.clearDisplay();
// 文本显示测试
display.setTextSize(1);
display.setTextColor(WHITE);
display.setCursor(0,0);
display.println("Hello, world!");
display.setTextColor(BLACK, WHITE); // 'inverted' text
display.println(3.141592);
display.setTextSize(2);
display.setTextColor(WHITE);
display.print("0x"); display.println(0xDEADBEEF, HEX);
display.display();
delay(2000);
display.clearDisplay();
// 微型位图显示
display.drawBitmap(30, 16, logo16_glcd_bmp, 16, 16, 1);
display.display();
delay(1);
// 反转显示
display.invertDisplay(true);
delay(1000);
display.invertDisplay(false);
delay(1000);
display.clearDisplay();
// 绘制一个位图图标和“动画”运动
testdrawbitmap(logo16_glcd_bmp, LOGO16_GLCD_HEIGHT, LOGO16_GLCD_WIDTH);
}
void loop() {
}
void testdrawbitmap(const uint8_t *bitmap, uint8_t w, uint8_t h) {
uint8_t icons[NUMFLAKES][3];
// 初始化
for (uint8_t f=0; f< NUMFLAKES; f++) {
icons[f][XPOS] = random(display.width());
icons[f][YPOS] = 0;
icons[f][DELTAY] = random(5) + 1;
Serial.print("x: ");
Serial.print(icons[f][XPOS], DEC);
Serial.print(" y: ");
Serial.print(icons[f][YPOS], DEC);
Serial.print(" dy: ");
Serial.println(icons[f][DELTAY], DEC);
}
while (1) {
// 画出每一个图标
for (uint8_t f=0; f< NUMFLAKES; f++) {
display.drawBitmap(icons[f][XPOS], icons[f][YPOS], bitmap, w, h, WHITE);
}
display.display();
delay(200);
// 然后擦除它+移动它
for (uint8_t f=0; f< NUMFLAKES; f++) {
display.drawBitmap(icons[f][XPOS], icons[f][YPOS], bitmap, w, h, BLACK);
// move it
icons[f][YPOS] += icons[f][DELTAY];
// 如果它消失了,那就reinit
if (icons[f][YPOS] > display.height()) {
icons[f][XPOS] = random(display.width());
icons[f][YPOS] = 0;
icons[f][DELTAY] = random(5) + 1;
}
}
}
}
void testdrawchar(void) {
display.setTextSize(1);
display.setTextColor(WHITE);
display.setCursor(0,0);
for (uint8_t i=0; i < 168; i++) {
if (i == '\n') continue;
display.write(i);
if ((i > 0) && (i % 21 == 0))
display.println();
}
display.display();
delay(1);
}
void testdrawcircle(void) {
for (int16_t i=0; i<display.height(); i+=2) {
display.drawCircle(display.width()/2, display.height()/2, i, WHITE);
display.display();
delay(1);
}
}
void testfillrect(void) {
uint8_t color = 1;
for (int16_t i=0; i<display.height()/2; i+=3) {
// alternate colors
display.fillRect(i, i, display.width()-i*2, display.height()-i*2, color%2);
display.display();
delay(1);
color++;
}
}
void testdrawtriangle(void) {
for (int16_t i=0; i<min(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, WHITE);
display.display();
delay(1);
}
}
void testfilltriangle(void) {
uint8_t color = WHITE;
for (int16_t i=min(display.width(),display.height())/2; i>0; i-=5) {
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, WHITE);
if (color == WHITE) color = BLACK;
else color = WHITE;
display.display();
delay(1);
}
}
void testdrawroundrect(void) {
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, WHITE);
display.display();
delay(1);
}
}
void testfillroundrect(void) {
uint8_t color = WHITE;
for (int16_t i=0; i<display.height()/2-2; i+=2) {
display.fillRoundRect(i, i, display.width()-2*i, display.height()-2*i, display.height()/4, color);
if (color == WHITE) color = BLACK;
else color = WHITE;
display.display();
delay(1);
}
}
void testdrawrect(void) {
for (int16_t i=0; i<display.height()/2; i+=2) {
display.drawRect(i, i, display.width()-2*i, display.height()-2*i, WHITE);
display.display();
delay(1);
}
}
void testdrawline() {
for (int16_t i=0; i<display.width(); i+=4) {
display.drawLine(0, 0, i, display.height()-1, WHITE);
display.display();
delay(1);
}
for (int16_t i=0; i<display.height(); i+=4) {
display.drawLine(0, 0, display.width()-1, i, WHITE);
display.display();
delay(1);
}
delay(250);
display.clearDisplay();
for (int16_t i=0; i<display.width(); i+=4) {
display.drawLine(0, display.height()-1, i, 0, WHITE);
display.display();
delay(1);
}
for (int16_t i=display.height()-1; i>=0; i-=4) {
display.drawLine(0, display.height()-1, display.width()-1, i, WHITE);
display.display();
delay(1);
}
delay(250);
display.clearDisplay();
for (int16_t i=display.width()-1; i>=0; i-=4) {
display.drawLine(display.width()-1, display.height()-1, i, 0, WHITE);
display.display();
delay(1);
}
for (int16_t i=display.height()-1; i>=0; i-=4) {
display.drawLine(display.width()-1, display.height()-1, 0, i, WHITE);
display.display();
delay(1);
}
delay(250);
display.clearDisplay();
for (int16_t i=0; i<display.height(); i+=4) {
display.drawLine(display.width()-1, 0, 0, i, WHITE);
display.display();
delay(1);
}
for (int16_t i=0; i<display.width(); i+=4) {
display.drawLine(display.width()-1, 0, i, display.height()-1, WHITE);
display.display();
delay(1);
}
delay(250);
}
void testscrolltext(void) {
display.setTextSize(2);
display.setTextColor(WHITE);
display.setCursor(10,0);
display.clearDisplay();
display.println("scroll");
display.display();
delay(1);
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();
}[/pre]
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