/Designs/Data_loggers/Magnetometry/MAG311001A/SW/LABduino/serial_read/serial_read.pde
0,0 → 1,157
/*
MAG3110 Breakout Example Code
by: Aaron Weiss, aaron at sparkfun dot com
SparkFun Electronics 2011
date: 9/6/11
license: beerware, if you use this code and happen to meet me, you
can by me a beer
 
The code reads the raw 16-bit x, y, and z values and prints them
out. This sketch does not use the INT1 pin, nor does it poll for
new data.
 
*/
 
#include <Wire.h>
 
#define MAG_ADDR 0x0E //7-bit address for the MAG3110, doesn't change
 
void setup()
{
Wire.begin(); // join i2c bus (address optional for master)
Serial.begin(9600); // start serial for output
config(); // turn the MAG3110 on
}
 
void loop()
{
print_values();
delay(5);
}
 
void config(void)
{
Wire.beginTransmission(MAG_ADDR); // transmit to device 0x0E
Wire.send(0x11); // cntrl register2
Wire.send(0x80); // send 0x80, enable auto resets
Wire.endTransmission(); // stop transmitting
delay(15);
Wire.beginTransmission(MAG_ADDR); // transmit to device 0x0E
Wire.send(0x10); // cntrl register1
Wire.send(1); // send 0x01, active mode
Wire.endTransmission(); // stop transmitting
}
 
void print_values(void)
{
Serial.print(readx());
Serial.print(" ");
Serial.print(ready());
Serial.print(" ");
Serial.println(readz());
}
 
int readx(void)
{
int xl, xh; //define the MSB and LSB
Wire.beginTransmission(MAG_ADDR); // transmit to device 0x0E
Wire.send(0x01); // x MSB reg
Wire.endTransmission(); // stop transmitting
delayMicroseconds(2); //needs at least 1.3us free time between start and stop
Wire.requestFrom(MAG_ADDR, 1); // request 1 byte
while(Wire.available()) // slave may send less than requested
{
xh = Wire.receive(); // receive the byte
}
delayMicroseconds(2); //needs at least 1.3us free time between start and stop
Wire.beginTransmission(MAG_ADDR); // transmit to device 0x0E
Wire.send(0x02); // x LSB reg
Wire.endTransmission(); // stop transmitting
delayMicroseconds(2); //needs at least 1.3us free time between start and stop
Wire.requestFrom(MAG_ADDR, 1); // request 1 byte
while(Wire.available()) // slave may send less than requested
{
xl = Wire.receive(); // receive the byte
}
int xout = (xl|(xh << 8)); //concatenate the MSB and LSB
return xout;
}
 
int ready(void)
{
int yl, yh; //define the MSB and LSB
Wire.beginTransmission(MAG_ADDR); // transmit to device 0x0E
Wire.send(0x03); // y MSB reg
Wire.endTransmission(); // stop transmitting
delayMicroseconds(2); //needs at least 1.3us free time between start and stop
Wire.requestFrom(MAG_ADDR, 1); // request 1 byte
while(Wire.available()) // slave may send less than requested
{
yh = Wire.receive(); // receive the byte
}
delayMicroseconds(2); //needs at least 1.3us free time between start and stop
Wire.beginTransmission(MAG_ADDR); // transmit to device 0x0E
Wire.send(0x04); // y LSB reg
Wire.endTransmission(); // stop transmitting
delayMicroseconds(2); //needs at least 1.3us free time between start and stop
Wire.requestFrom(MAG_ADDR, 1); // request 1 byte
while(Wire.available()) // slave may send less than requested
{
yl = Wire.receive(); // receive the byte
}
int yout = (yl|(yh << 8)); //concatenate the MSB and LSB
return yout;
}
 
int readz(void)
{
int zl, zh; //define the MSB and LSB
Wire.beginTransmission(MAG_ADDR); // transmit to device 0x0E
Wire.send(0x05); // z MSB reg
Wire.endTransmission(); // stop transmitting
delayMicroseconds(2); //needs at least 1.3us free time between start and stop
Wire.requestFrom(MAG_ADDR, 1); // request 1 byte
while(Wire.available()) // slave may send less than requested
{
zh = Wire.receive(); // receive the byte
}
delayMicroseconds(2); //needs at least 1.3us free time between start and stop
Wire.beginTransmission(MAG_ADDR); // transmit to device 0x0E
Wire.send(0x06); // z LSB reg
Wire.endTransmission(); // stop transmitting
delayMicroseconds(2); //needs at least 1.3us free time between start and stop
Wire.requestFrom(MAG_ADDR, 1); // request 1 byte
while(Wire.available()) // slave may send less than requested
{
zl = Wire.receive(); // receive the byte
}
int zout = (zl|(zh << 8)); //concatenate the MSB and LSB
return zout;
}