67 lines
1.5 KiB
Plaintext
67 lines
1.5 KiB
Plaintext
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//Arduino I2C ADXL345 example code
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//Dave Vondle, 11/16/09
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//SDA (data line) is on analog input pin 4
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//SCL (clock line) is on analog input pin 5
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#include <Wire.h>
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#define X0 0x32
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#define X1 0x33
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#define Y0 0x34
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#define Y1 0x35
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#define Z0 0x36
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#define Z1 0x37
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void setup()
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{
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Wire.begin(); // join i2c bus
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Serial.begin(19200); // start serial for output
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Wire.beginTransmission(0x1D); // transmit to ADXL345
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Wire.send(0x2D);// POWER_CTL
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Wire.send(0x09);// measurement mode, 4hz wakeup
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Wire.endTransmission(); // stop transmitting
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}
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void loop()
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{
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Serial.print(getDir('x'), DEC); // print as an ASCII-encoded decimal
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Serial.print("t"); // prints a tab
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Serial.print(getDir('y'), DEC);
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Serial.print("t");
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Serial.print(getDir('z'), DEC);
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Serial.print("t");
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Serial.println(""); // prints a newline
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delay(300);
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}
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byte requestByte(char dir){
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Wire.beginTransmission(0x1D); // transmit to ADXL345
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Wire.send(dir);
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Wire.endTransmission(); // stop transmitting
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Wire.requestFrom(0x1D, 1); // request 1 byte from ADXL345
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while(Wire.available())return(Wire.receive()); //
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}
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int getDir(char dir){
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int var;
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if(dir=='x'){
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var=requestByte(X0);
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var=var+(requestByte(X1)<<8);
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}else if(dir=='y')
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{
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var=requestByte(Y0);
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var=var+(requestByte(Y1)<<8);
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}
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else if(dir=='z')
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{
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var=requestByte(Z0);
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var=var+(requestByte(Z1)<<8);
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}
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return(var);
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}
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