群里老师全部用不了电机驱动,然后我自己测试了一下,确实驱动不了
刚刚开始我认为供电出问题了,测试了下接口的电源的电压。然后很迷离
按道理说电压都是相同的!可是测出来1.8V,另外一个线路是正常
下面是正常的板子供电接口电压
至于为啥这样就不得而知了,还没找出原因,而且电源负极和电机驱动版的负极不通是断路
接着我测试下,直接打印寻找这个开发版所有的i2c地址并且打印出来,结果并没有打印出电机驱动对应的地址
打开一个程序并将下面的代码复制到其中。将其上传到Arduino并打开串行监视器观察
代码
// --------------------------------------
// i2c_scanner
//
// Version 1
// This program (or code that looks like it)
// can be found in many places.
// For example on the Arduino.cc forum.
// The original author is not know.
// Version 2, Juni 2012, Using Arduino 1.0.1
// Adapted to be as simple as possible by Arduino.cc user Krodal
// Version 3, Feb 26 2013
// V3 by louarnold
// Version 4, March 3, 2013, Using Arduino 1.0.3
// by Arduino.cc user Krodal.
// Changes by louarnold removed.
// Scanning addresses changed from 0...127 to 1...119,
// according to the i2c scanner by Nick Gammon
// https://www.gammon.com.au/forum/?id=10896
// Version 5, March 28, 2013
// As version 4, but address scans now to 127.
// A sensor seems to use address 120.
// Version 6, November 27, 2015.
// Added waiting for the Leonardo serial communication.
//
//
// This sketch tests the standard 7-bit addresses
// Devices with higher bit address might not be seen properly.
//
#include <Wire.h>
void setup()
{
Wire.begin();
Serial.begin(9600);
while (!Serial); // Leonardo: wait for serial monitor
Serial.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 acknowledge to the address.
Wire.beginTransmission(address);
error = Wire.endTransmission();
if (error == 0)
{
Serial.print("I2C device found at address 0x");
if (address<16)
Serial.print("0");
Serial.print(address,HEX);
Serial.println(" !");
nDevices++;
}
else if (error==4)
{
Serial.print("Unknown error at address 0x");
if (address<16)
Serial.print("0");
Serial.println(address,HEX);
}
}
if (nDevices == 0)
Serial.println("No I2C devices found\n");
else
Serial.println("done\n");
delay(5000); // wait 5 seconds for next scan
}
从刚刚的图中并没有电机驱动的地址:0x10
初步我觉得是板子这个驱动应该是断路的。没有接入到开发版电路中去,至于电源接口哪里电压异常,已经反馈给官方,等待结果ing…….
好啦祝大家调试顺利
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