main.cpp

00001 #include "mbed.h"
00002 #include "MMA8451Q.h"
00003 
00004 #define MMA8451_I2C_ADDRESS (0x1d<<1)
00005 MMA8451Q acc(PTE25, PTE24, MMA8451_I2C_ADDRESS);
00006 
00007 PwmOut rled(LED_RED);
00008 PwmOut gled(LED_GREEN);
00009 PwmOut bled(LED_BLUE);
00010 Serial pc(USBTX, USBRX);
00011 
00012 void motion( void);             // callback function for motion detection mode
00013 void freefall( void);           // callback function for freefall detection mode
00014 void orientation( void);        // callback function for orientation detection mode
00015 void dataready( void);
00016 
00017 unsigned int ff, md, od;
00018 float sensor_data[3];
00019 int16_t raw_data[3];
00020 
00021 int main(void) {
00022 
00023     rled = 0.0;
00024     gled = 0.0;
00025     bled = 0.0;
00026 
00027     ff = md = 0;
00028     
00029     pc.baud( 230400);
00030     pc.printf("MMA8451 Accelerometer. [%X]\r\n", acc.getWhoAmI());
00031 
00032     // 
00033     pc.printf("FreeFall Detection\r\n");
00034     // Configure the accelerometer for the freefall detection and
00035     // set the callback function:
00036     acc.FreeFallDetection( &freefall);
00037     
00038     while( 1) {
00039         // please type in a key:
00040         if(pc.readable()) {
00041             switch (pc.getc()) {
00042                 case 'f':
00043                 // Configure the accelerometer for the freefall detection and
00044                 // set the callback function:
00045                 pc.printf("FreeFall Detection\r\n");
00046                 acc.FreeFallDetection( &freefall);
00047                 break;
00048                 case 'm':
00049                 // Configure the accelerometer for the motion detection and
00050                 // set the callback function:
00051                 pc.printf("Motion Detection\r\n");
00052                 acc.MotionDetection( &motion);
00053                 break;
00054                 case 'o':
00055                 // Configure the accelerometer for the orientation detection and
00056                 // set the callback function:                
00057                 pc.printf("Orientation Detection\r\n");
00058                 acc.OrientationDetect( &orientation);
00059                 break;
00060                 case 'r':
00061                 // Configure the accelerometer for the data ready and
00062                 // set the callback function:                
00063                 pc.printf("Data Ready\r\n");
00064                 acc.DataReady( &dataready, cODR_1_56HZ);
00065                 break;
00066                 case 'w':
00067                 // Read the accelorometer value in raw mode.
00068                 pc.printf("Polling method and data raw\r\n");
00069                 //
00070                 while( 1) {
00071                     if ( pc.readable()) {
00072                         break;
00073                     }
00074                     // Check data availability
00075                     if ( acc.getAccRawAllAxis( &raw_data[0])) {
00076                         pc.printf("X: %X, Y: %X, Z: %X\r\n", raw_data[0], raw_data[1], raw_data[2]);
00077                         wait( 1.0);
00078                     }
00079                 }
00080                 break;
00081 
00082             }
00083         }
00084     }
00085 }
00086 
00087 // callback function for orientation detection mode
00088 void orientation( void)
00089 { 
00090     unsigned char o;
00091     
00092     o = acc.GetOrientationState();
00093     
00094     bled = 1.0;
00095     
00096     od++;
00097     
00098     //
00099     if ( o & 0x01)
00100         pc.printf("Front ");
00101     else
00102         pc.printf("Back ");
00103     pc.printf("facing\r\n");
00104     
00105     //
00106     o = (o>>1) & 0x03;
00107     switch( o) {
00108         case 0:
00109         pc.printf("Portrait Up ");
00110         break;
00111         case 1:
00112         pc.printf("Portrait Down ");
00113         break;
00114         case 2:
00115         pc.printf("Landscape Right ");
00116         break;
00117         case 3:
00118         pc.printf("Landscape Left ");
00119         break;                
00120     }
00121     
00122     pc.printf( "\r\nod %d\t ornt: %X\r\n", od, o);
00123 }
00124 
00125 // callback function for motion detection mode
00126 void motion( void)
00127 {
00128     rled = 1.0;
00129     
00130     md++;
00131     pc.printf( "md %d\r\n", md);
00132 }
00133 
00134 // callback function for freefall detection mode
00135 void freefall( void)
00136 {
00137     gled = 1.0;
00138     
00139     ff++;
00140     pc.printf( "ff %d\r\n", ff);    
00141 }
00142 
00143 // callback function for data reading
00144 void dataready( void)
00145 {
00146     acc.getAccAllAxis( &sensor_data[0]);
00147     pc.printf("X: %f, Y: %f, Z: %f\r\n", sensor_data[0], sensor_data[1], sensor_data[2]);
00148 }