Thinking that there was Arduino codes for this already out there, But i don't think a lot of people has put it on the web. I have found one post with some codes but it was written for the larger Arduino and it also used 74LS595.
I need help making a basic Compass code so i can read 0-359 degrees
You need to dive into I2C programming and for Arduino there exist the Wire library for this. I2C is hardcoded on analog pin 4 and 5, furthermore you need to connect the GND of the Arduino and the compass.
device address is [0110000]
Code should be something like below (but as I don't have such a compass I can't test it. Hopes this helps,
Rob
setup()
{
...
Wire.begin(); // join i2c bus (as master)
...
}
unsigned int getCompass()
{
Wire.beginTransmission(0x30); // this is 0110000
Wire.send(0x01); // TM Take Measurement Page 10 - http://www.sure-electronics.net/download/DC-SS503_Ver1.0_EN.pdf
delay(?);
register = wire.receive();
int X = wire.receive();
X = X * 256 + wire.receive();
int Y = wire.receive();
Y *= 256 + wire.receive();
msbY = wire.receive();
}
robtillaart:
You need to dive into I2C programming and for Arduino there exist the Wire library for this. I2C is hardcoded on analog pin 4 and 5, furthermore you need to connect the GND of the Arduino and the compass.
device address is [0110000]
Code should be something like below (but as I don't have such a compass I can't test it. Hopes this helps,
Rob
unsigned int getCompass()
{
Wire.beginTransmission(0x30); // this is 0110000
Wire.send(0x01); // TM Take Measurement Page 10 - http://www.sure-electronics.net/download/DC-SS503_Ver1.0_EN.pdf
delay(?);
register = wire.receive();
int X = wire.receive();
X = X * 256 + wire.receive();
int Y = wire.receive();
Y *= 256 + wire.receive();
msbY = wire.receive();
}
Hi thanks for the reply
So how do i test the code you have written for me.
I have so far been able to measure temperature, voltage (from a voltage divider i made) and have it displayed on a LCD screen. But i have just been combining and modifying codes i have found. I am interested in using my arduino for actual use's thats why i got the compass but it's proving to be really difficult to program.
IDK i will spend some more time trying to figure it out. Thanks you.. maybe i just need some one with the programing knowledge to explain it to me.
So how do i test the code you have written for me.
Use it in a sketch. and work through the I2C tutorials on Arduino.cc
As the device addres is 7 bit you might need to shift it one bit right. 0x30 => 0X18
You can use the I2C scanner below to confirm the address.
/**
* I2CScanner.pde -- I2C bus scanner for Arduino
*
* 2009, Tod E. Kurt, http://todbot.com/blog/
*
*/
#include "Wire.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);
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.print( (result==0) ? " found!":" ");
Serial.print( (addr%4) ? "\t":"\n");
}
byte start_address = 1;
byte end_address = 100;
// standard Arduino setup()
void setup()
{
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);
}
