#define SCREEN_HEIGHT 64 // OLED display height, in pixels // Declaration for an SSD1306 display connected to I2C (SDA, SCL pins) #define OLED_RESET -1 // Reset pin # (or -1 if sharing Arduino reset pin) #define SCREEN_ADDRESS 0x3D Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGH...
would probaby require importing // Arduino.h to get SCL and SDA pins for (i = 0; i < TOTAL_PINS; i++) { if (IS_PIN_I2C(i)) { // mark pins as i2c so they are ignore in non i2c data requests setPinModeCallback(i, PIN_MODE_I2C); } } isI2CEnabled = true; Wire.begin()...
手柄红线 ( +5V ) –》 Arduino 5V 手柄绿线 (SDA) –》模拟引脚 4 或者 专用的 SDApin 手柄黄线 (SCL) –》 模拟引脚 5 或者 专用的 SCL pin 连接伺服电机到Arduino 双轴舵机云台 Servo 1 (x-axis) 舵机棕线 (GND) –》 Arduino GND 舵机红线 (5V) –》 Arduino 5V 舵机黄线 (data/Signal) –...
UNO 已经发布 到第三版,与前两版相比有以下新的特点: 在 AREF 处增加了两个管脚 SDA 和 SCL,支持 I2C 接口;增加 IOREF 和一 个预留管脚,将来扩展板将能兼容 5V 和 3.3V 核心板。 这样改进了复位电路设 计,USB 接口芯片由 ATmega16U2 替代了 ATmega8U2 。如图 4-1 为改进后的 Arduino UNO。 6 图 ...
setPins(5, 6); // 指定 SDA 为 GPIO5,SCL 为 GPIO6 LCD.init(); LCD.backlight(); // 打开 1602 液晶屏背光 LCD.print("Distance:"); // 显示 1602 液晶屏第 1 行内容 semaphore = xSemaphoreCreateBinary(); /* 硬件定时器 */ Timer1 = timerBegin(0, 240, true); // 把 UINIO-MCU-...
PinChangeInterrupt Library 1.2.9 PinChangeInterrupt library with a resource friendly implementation (API and LowLevel). PinChangeInterrupts are different than normal Interrupts. See detail below. Features: PinChangeInterrupt for a lot of pins Rising, Falling or Change detection for every pin separatel...
Use I2C Serial, only 2 microcontroller pins, to display messages on the LCD 1602. Connect LCD to Nano: SCL - A5 SDA - A4 VCC - 5V GND - GND I2C communications between Nano boards. Works, but not when the project also includes a DS3231 clock board which uses I2C. ...
CHANGE:引脚电平值改变时触发中断 FALLNG:引脚电平从高到低时触发中断 RISING:引脚电平从低到高时触发中断 ISR 需要有 ICACHE_RAM_ATTR 修饰,如果没有该属性会在attachInterrupt部分报错。如下是HX711的一个中断实例: //HX711的中断处理函数 ICACHE_RAM_ATTR void dataReadyISR() { ...
The Uno R3 also adds SDA and SCL pins next to the AREF. In addition, there are two new pins placed near the RESET pin. One is the IOREF that allow the shields to adapt to the voltage provided from the board. The other is a not connected and is reserved for future purposes. The Un...
TFT_SDA 20#define TFT_SCL 21#define TFT_BL 19// OPTION 1 (recommended) is to use the HARDWARE SPI pins, which are unique// to each board and not reassignable. For Arduino Uno: MOSI = pin 11 and// SCLK = pin 13. This is the fastest mode of operation and is required if// ...