Paso 2: Función y programación
Función
- Control botón 3 segundos para cambiar el modo
Modo 0: Mostrar X sólo
Modo 1: Mostrar Y sólo
Modo 2: Mostrar X e Y en matriz de punto rojo
<p>/*<br> * iMediaBank 201605 * * ONLY for ADXL345 XYZ Sensor * * Connect -ADXL345 and Arduino * I2C : SDA : A4 (Digispark D0) SCL : A5 (Digispark D2) SDO : GND CS : V++ * * * Connect Matrix 8x8 and Arduino : * CLK : PIN 11 * CS : PIN 10 * DIN : PIN 12 * * */</p><p>#include <wire.h> #include "LedControl.h" #define DEVICE (0x53) //ADXL345 device address #define TO_READ (6) //num of bytes we are going to read each time (two bytes for each axis) byte buff[TO_READ] ; //6 bytes buffer for saving data read from the device char str[512]; //string buffer to transform data before sending it to the serial port int regAddress = 0x32; //first axis-acceleration-data register on the ADXL345 int x, y, z; //three axis acceleration data double roll = 0.00, pitch = 0.00; //Roll & Pitch are the angles which rotate by the axis X and y //in the sequence of R(x-y-z),more info visit // https://www.dfrobot.com/wiki/index.php?title=How_...></p><p>// --------------------------- Matrix int matrix = 1; LedControl lc=LedControl(12,11,10,matrix); /* we always wait a bit between updates of the display */ unsigned long delaytime=100;</p><p>// ----------------------------- Control Button int ctrlBtn = 2; // Control Button int dispMode = 2; // Display Mode (x, y, z, xyz and freePoint)</p><p>// -------------------------------- Reset Matrix void resetMatrix() { for (int k=0;k<matrix; k++)="" {="" ="" lc.shutdown(k,false);="" *="" set="" the="" brightness="" to="" a="" medium="" values="" lc.setintensity(k,8);="" and="" clear="" display="" lc.cleardisplay(k);="" } ="" }="" ------------------------------="" reset="" matrix="" end<="" p=""></matrix;></p><p>// ------------------------------- Setup void setup() { Wire.begin(); // join i2c bus (address optional for master) Serial.begin(115200); // start serial for output //Turning on the ADXL345 writeTo(DEVICE, 0x2D, 0); writeTo(DEVICE, 0x2D, 16); writeTo(DEVICE, 0x2D, 8);</p><p> resetMatrix();</p><p>}</p><p>const int XYZSize = 3; byte XYZ[XYZSize][8]={ {B00100100, B00011000, B00100100, B00000000, B11111111, B00000000, B11111111, B00000000}, // X {B01010000, B01010000, B01010100, B01010011, B01010100, B01010000, B01010000, B01010000}, // Y //{B01001000, B01011000, B01101000, B00000000, B00000000, B00111111, B00111111, B00000000}, // Z //{B10011111, B01011111, B00000000, B10000111, B10000111, B00000000, B10001111, B11001111}, //XYZ {B00000000, B01000000, B00000000, B00011100, B00011000, B00010100, B00000010, B00000001}}; // Free Point</p><p>// -------------------------- writeMatrix void writeMatrix() { for (int j=0; j<xyzsize;j++) {="" ="" for="" (int="" i="0;" i<8;="" i++)="" lc.setrow(0,i,xyz[j][7-i]);="" lc.setcolumn(0,i,xyz[j][7-i]);="" delay(delaytime);="" }="" }<="" p=""></xyzsize;j++)></p><p>} // ---------------------------- writeMatrix END</p><p>// -------------------------- Display Matrix void displayMatrix(int matrixIndex) { for (int i=0; i<8; i++) { lc.setRow(0,i,XYZ[matrixIndex][7-i]); //lc.setColumn(0,i,XYZ[matrixIndex][7-i]); //delay(delaytime); } } // ---------------------------- display Matrix END</p><p>// -------------------------- Signle int oldx = 0, oldy = 0; void single(int x, int y) { if ((oldx != x) || (oldy != y)) lc.setLed(0, oldx, oldy,false); lc.setLed(0,x,y,true);</p><p> oldx = x; oldy = y; } //-------------------------------- Single END</p><p>// ----------------------------------------- LOOP void loop() {</p><p> if (digitalRead(ctrlBtn) == false) { readFrom(DEVICE, regAddress, TO_READ, buff); //read the acceleration data from the ADXL345 //each axis reading comes in 10 bit resolution, ie 2 bytes. Least Significat Byte first!! //thus we are converting both bytes in to one int x = (((int)buff[1]) << 8) | buff[0]; y = (((int)buff[3])<< 8) | buff[2]; z = (((int)buff[5]) << 8) | buff[4]; //we send the x y z values as a string to the serial port Serial.print("The acceleration info of x, y, z are:"); sprintf(str, " %d %d %d", x, y, z); Serial.print(str); Serial.write(10);</p><p> int xx = map(x, 280, -245, 0, 7); int yy = map(y, 280, -245, 7, 0); sprintf(str, " %d / %d : %d", xx, yy, dispMode); Serial.println(str); </p><p> switch (dispMode) { case 0 : // X displayMatrix(dispMode); single(2, xx); break; case 1 : // Y displayMatrix(dispMode); single(yy, 2); break; case 2 : // Free Point single(yy, xx); break; default: single(yy, xx); break; } /* //Roll & Pitch calculate RP_calculate(); Serial.print("Roll:"); Serial.println( roll ); Serial.print("Pitch:"); Serial.println( pitch ); Serial.println(""); //It appears that delay is needed in order not to clog the port */ delay(100); } else { // -------------------------- Control Mode dispMode++; if (dispMode >= 3) dispMode = 0; Serial.println(dispMode); displayMatrix(dispMode); delay(3000); lc.clearDisplay(0); }</p><p>} //------------------------------ LOOP end </p><p>//---------------- ADXL345 Functions //Writes val to address register on device void writeTo(int device, byte address, byte val) { Wire.beginTransmission(device); //start transmission to device Wire.write(address); // send register address Wire.write(val); // send value to write Wire.endTransmission(); //end transmission } //reads num bytes starting from address register on device in to buff array void readFrom(int device, byte address, int num, byte buff[]) { Wire.beginTransmission(device); //start transmission to device Wire.write(address); //sends address to read from Wire.endTransmission(); //end transmission Wire.beginTransmission(device); //start transmission to device Wire.requestFrom(device, num); // request 6 bytes from device int i = 0; while(Wire.available()) //device may send less than requested (abnormal) { buff[i] = Wire.read(); // receive a byte i++; } Wire.endTransmission(); //end transmission } //calculate the Roll&Pitch void RP_calculate(){ double x_Buff = float(x); double y_Buff = float(y); double z_Buff = float(z); roll = atan2(y_Buff , z_Buff) * 57.3; pitch = atan2((- x_Buff) , sqrt(y_Buff * y_Buff + z_Buff * z_Buff)) * 57.3; }</p> Para obtener información sobre la instalación de bibliotecas, consulte: http://www.arduino.cc/en/Guide/Libraries
Detalles, consulte: http://www.imediabank.com
