Ich bekomme den scaner auch nicht ans laufen
/**
- I2CScanner.pde -- I2C bus scanner for Arduino
- 2009, Tod E. Kurt, todbot blog – Random experiments, circuits, code, rapid prototyping, sometimes things to buy, and the odd tune by Tod Kurt.
*/
#include "Wire.h"
#include <avr/io.h>
extern "C" {
#include "utility/twi.h" // from Wire library, so we can do bus scanning
}
// Scan the I2C bus between addresses from_addr and to_addr.
// On each address, call the callback function with the address and result.
// If result==0, address was found, otherwise, address wasn't found
// (can use result to potentially get other status on the I2C bus, see twi.c)
// Assumes Wire.begin() has already been called
void scanI2CBus(byte from_addr, byte to_addr,
void(*callback)(byte address, byte result) )
{
byte rc;
byte data = 0; // not used, just an address to feed to twi_writeTo()
for( byte addr = from_addr; addr <= to_addr; addr++ ) {
rc = twi_writeTo(addr, &data, 0, 1); da schreibt das prog immer "at this point in file"
if(rc==0) callback( addr, rc );
}
}
// Called when address is found in scanI2CBus()
// Feel free to change this as needed
// (like adding I2C comm code to figure out what kind of I2C device is there)
void scanFunc( byte addr, byte result ) {
Serial.print("addr: ");
Serial.print(addr,DEC);
Serial.println( (result==0) ? " found!":" ");
// Serial.print( (addr%4) ? "\t":"\n");
}
byte start_address = 1;
byte end_address = 127;
// standard Arduino setup()
void setup()
{
DDRC|=_BV(2) |_BV(3);
PORTC |=_BV(3);
Wire.begin();
Serial.begin(19200);
Serial.println("\nI2CScanner ready!");
Serial.print("starting scanning of I2C bus from ");
Serial.print(start_address,DEC);
Serial.print(" to ");
Serial.print(end_address,DEC);
Serial.println("...");
// start the scan, will call "scanFunc()" on result from each address
scanI2CBus( start_address, end_address, scanFunc );
Serial.println("\ndone");
}
// standard Arduino loop()
void loop()
{
// Nothing to do here, so we'll just blink the built-in LED
digitalWrite(13,HIGH);
delay(300);
digitalWrite(13,LOW);
delay(300);
}