When you include the Arduino Core I2C driver “Wire.h“, it’s by default set to I2C0 peripheral, and the (SDA & SCL) lines are set to defaults as shown in the previous section. However, you can still change the
Arduino Software I2C User Guide The standard I2C library for the Arduino is the Wire library. While this library is sufficient most of the time, there are situations when it cannot be used: the I2C pins A4/A5 (or SDA/SCL) are in use already for other purposes same I2C addresses devices...
= PIN_MODE_I2C) { // disable i2c so pins can be used for other functions // the following if statements should reconfigure the pins properly disableI2CPins(); } if (IS_PIN_DIGITAL(pin) && mode != PIN_MODE_SERVO) { if (servoPinMap[pin] < MAX_SERVOS && servos[servoPinMap[pin]]....
LiquidCrystal_I2C lcd(I2C_ADDR,En_pin,Rw_pin,Rs_pin,D4_pin,D5_pin,D6_pin,D7_pin); void setup() { pinMode(7,OUTPUT); pinMode(6,OUTPUT); lcd.begin (16,2); // 《《-- our LCD is a 20x4, change for your LCD if needed // LCD Backlight ON lcd.setBacklightPin(BACKLIGHT_...
Unset: clears pin designation. The pin is no longer reserved and can be automatically set at the next operation. Pins are configured on first usage. You can reset the pin mode to change the mode. If you want to use a pullup, you must set the mode to 'pullup'. ...
long random(max) 随机数函数,返回数据大于等于0,小于max。 long random(min, max) 随机数函数,返回数据大于等于min,小于max。 外部中断函数 attachInterrupt(interrupt, , mode) 外部中断只能用到数字IO口2和3,interrupt表示中断口初始0或1,表示一个功能函数,mode:LOW低电平中断,CHANGE有变化就中断,RISING上升沿中...
I2C I2C通信 Two pins 20 and 21 support I2C communication where 20 represents SDA (Serial Data Line mainly used for holding the data) and 21 represents SCL(Serial Clock Line mainly used for providing data synchronization between the devices) ...
(pinInterrupt2,INPUT);//Enable中断管脚,中断服务程序为onChange(), 监视引脚变化attachInterrupt(digitalPinToInterrupt(pinInterrupt1),onChange,CHANGE);attachInterrupt(digitalPinToInterrupt(pinInterrupt2),onChange,CHANGE);}voidloop(){//模拟长时间运行的进程/复杂的任务。for(inti=0;i<100;i++){delay(20);}...
// 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_HEIGHT, &Wire, OLED_RESET); int pbIn = 0; // Define interru...
The second function is ui_check_slow_encoder, which is intended for rotary encodes connected over I2C. This is the only key macro you should add there. As you see, there is already one included, but you may need to change the type or pins or disable it, if you use I2C keys without...