这里为了演示Arduino 中的 I2C 通信,我们使用两个 Arduino UNO,两个16X2 LCD 显示器相互连接,并在两个 arduino 上使用两个电位器来确定从主机到从机和从机到主机的发送值(0 到 127),方法是改变电位器。 我们通过使用电位器将 arduino 引脚 A0 的输入模拟值从(0 到 5V)获取,并将它们转换为模拟到数字值(0...
println("\nI2C Scanner"); } void loop(){ byte error, address; int nDevices; Serial.println("Scanning..."); nDevices = 0; for (address = 1; address < 127; address++ ){ // The i2c_scanner uses the return value of // the Write.endTransmisstion to see if // a device did ackn...
AI代码解释 #include<Wire.h>voidsetup(){Wire.begin();Serial.begin(9600);Serial.println("\nI2C Scanner");}voidloop(){byte error,address;int nDevices;Serial.println("Scanning...");nDevices=0;for(address=1;address<127;address++){// The i2c_scanner uses the return value of// the Write....
1、将一个I2C器件连接至arduino的SDA、SCL引脚(UNO R3 连接A4、A5) 2、将如下代码烧入arduino,打开串口界面即可得到I2C设备的地址。 #include 《Wire.h》 void setup() { Wire.begin(); Serial.begin(9600); Serial.println(“nI2C Scanner”); } void loop() { byte error, address; int nDevices; Se...
Serial.println("\nI2C Scanner"); } voidloop() { byteerror,address; intnDevices; Serial.println("Scanning..."); nDevices=0; for(address=1;address<127;address++) { // The i2c_scanner uses the return value of // the Write.endTransmisstion to see if ...
As of Arduino 1.0.1, requestFrom() accepts a boolean argument changing its behavior for compatibility with certain I2C devices. If true, requestFrom() sends a stop message after the request, releasing the I2C bus. If false, requestFrom() sends a restart message after the request. The bus wil...
模块通过电阻将相应IO口配置固化使用了I2C接口方式,但可能你买到的同样的驱动芯片的模块会采用其他接口。使用I2C接口时, SSD1306允许有最多两个7位的I2C地址,同样通过相应的IO口拉低拉高来切换, 一般默认是0x3C。在有些模块(不是所有,有些PCB没有预留)的背面,可以看到I2C地址选项提示,需要改变模块I2C地址时只需要...
9.Serial.println("\nI2C Scanner"); 10.} 11. 12. 13.voidloop() 14.{ 15.byteerror, address; 16.intnDevices; 17. 18.Serial.println("Scanning..."); 19. 20.nDevices = 0; 21.for(address = 1; address < 127; address++ ) 22.{ 23.// The i2c_scanner uses the return value of...
2. 留意设置的ODR频率不要超出I2C总线的数据读取速率。如Arduino的I2C总线时钟频率为100kHz,则可设置的最大ODR为200Hz。 测试代码 View Code ODR设定为1.56Hz,通过串口打印三个维度的加速度值,单位为mg。 参考资料 ADXL345 - Analog Devices
println("---I2C Scanner---");}void loop(){ byte error, address; int nDevices; Serial.println("Scanning..."); nDevices = 0; for(address = 1; address < 127; address++ ) { Wire.beginTransmission(address); error = Wire.endTransmission(); Wire.beginTransmission(address+1); if (error ...