From f932dc119b6a0490a34fa9102617d9d584c0439b Mon Sep 17 00:00:00 2001 From: AceVest Date: Thu, 18 Jan 2018 16:42:41 +0800 Subject: [PATCH] ... --- arduino/I2C/scanner/scanner.ino | 80 +++++++++++++++++++++++++++++++++ 1 file changed, 80 insertions(+) create mode 100644 arduino/I2C/scanner/scanner.ino diff --git a/arduino/I2C/scanner/scanner.ino b/arduino/I2C/scanner/scanner.ino new file mode 100644 index 0000000..0879318 --- /dev/null +++ b/arduino/I2C/scanner/scanner.ino @@ -0,0 +1,80 @@ +// -------------------------------------- +// 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 known. +// 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 +// http://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. +// +// +// This sketch tests the standard 7-bit addresses +// Devices with higher bit address might not be seen properly. +// + +#include + + +void setup() +{ + Wire.begin(); + + Serial.begin(9600); + 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("Unknow 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 +} -- 2.44.0