Question

小白自学arduino，关于IO口

小白自学arduino，关于IO口比如我串个电阻一头接pin4一头接GND,在默认状态下IO口是高还是低电平还是啥都没？不是电子专业的，问题可能比较蠢啊。。。

Answer 1

小白自学arduino，关于IO口
include <PID_v1.h>
#include <LMotorController.h>
#include "I2Cdev.h"

#include "MPU6050_6Axis_MotionApps20.h"

#if I2CDEV_IMPLEMENTATION == I2CDEV_ARDUINO_WIRE
#include "Wire.h"
#endif

#define LOG_INPUT 0
#define MANUAL_TUNING 0
#define LOG_PID_CONSTANTS 0 //MANUAL_TUNING must be 1
#define MOVE_BACK_FORTH 1

#define MIN_ABS_SPEED 50

//MPU

MPU6050 mpu;

// MPU control/status vars
bool dmpReady = false; // set true if DMP init was successful
uint8_t mpuIntStatus; // holds actual interrupt status byte from MPU
uint8_t devStatus; // return status after each device operation (0 = success, !0 = error)
uint16_t packetSize; // expected DMP packet size (default is 42 bytes)
uint16_t fifoCount; // count of all bytes currently in FIFO
uint8_t fifoBuffer[64]; // FIFO storage buffer

追问

看不太懂啊～你是机器人吗

Answer 2

Arduino入门2：板子IO口这么多，都是做什么的，两分钟学会入门