Shengming Zhu / Mbed 2 deprecated mbed_ProjectC_Accelerometer

MMA8452 3 axis accelerometer.

Dependencies:   MMA8452 N5110 mbed

main.cpp@0:bfe6cbe4dd56, 2015-05-10 (annotated)

Committer:
a1163480319
Date:
Sun May 10 11:12:24 2015 +0000
Revision:
0:bfe6cbe4dd56
Child:
2:a659621a83b0
ProjectC MMA8452 Accelerometer

Who changed what in which revision?

UserRevisionLine numberNew contents of line
a1163480319 0:bfe6cbe4dd56 1 #include "mbed.h"
a1163480319 0:bfe6cbe4dd56 2 #include "N5110.h"
a1163480319 0:bfe6cbe4dd56 3 #include "MMA8452.h"
a1163480319 0:bfe6cbe4dd56 4
a1163480319 0:bfe6cbe4dd56 5
a1163480319 0:bfe6cbe4dd56 6
a1163480319 0:bfe6cbe4dd56 7 N5110 lcd(p7,p8,p9,p10,p11,p13,p26);
a1163480319 0:bfe6cbe4dd56 8 MMA8452 mma8452(p28,p27); // SDA, SCL
a1163480319 0:bfe6cbe4dd56 9 Serial serial(USBTX,USBRX);//serial port
a1163480319 0:bfe6cbe4dd56 10 InterruptIn button(p17);//button
a1163480319 0:bfe6cbe4dd56 11
a1163480319 0:bfe6cbe4dd56 12 Ticker buzzer_timer;//buzzer timer
a1163480319 0:bfe6cbe4dd56 13 PwmOut buzzer(p21);//buzzer
a1163480319 0:bfe6cbe4dd56 14
a1163480319 0:bfe6cbe4dd56 15 AnalogIn pot(p20); /* Potentiometer middle pin connected to P0_11, other two ends connected to GND and 3.3V */
a1163480319 0:bfe6cbe4dd56 16
a1163480319 0:bfe6cbe4dd56 17
a1163480319 0:bfe6cbe4dd56 18
a1163480319 0:bfe6cbe4dd56 19
a1163480319 0:bfe6cbe4dd56 20 int fsm[4] = {1,2,4,8}; // simple FSM counter has 4 states
a1163480319 0:bfe6cbe4dd56 21 int state = 0; // initial state 0
a1163480319 0:bfe6cbe4dd56 22 // defines for direction
a1163480319 0:bfe6cbe4dd56 23 #define UP 0
a1163480319 0:bfe6cbe4dd56 24 #define DOWN 1
a1163480319 0:bfe6cbe4dd56 25 #define MID 2
a1163480319 0:bfe6cbe4dd56 26
a1163480319 0:bfe6cbe4dd56 27 int direction = UP; // initially count up
a1163480319 0:bfe6cbe4dd56 28
a1163480319 0:bfe6cbe4dd56 29 float frequency=659;
a1163480319 0:bfe6cbe4dd56 30
a1163480319 0:bfe6cbe4dd56 31
a1163480319 0:bfe6cbe4dd56 32 int k=0;
a1163480319 0:bfe6cbe4dd56 33
a1163480319 0:bfe6cbe4dd56 34 void buttonPressed() // toggle direction in ISR
a1163480319 0:bfe6cbe4dd56 35 {
a1163480319 0:bfe6cbe4dd56 36 k++;
a1163480319 0:bfe6cbe4dd56 37
a1163480319 0:bfe6cbe4dd56 38 direction=k%3;
a1163480319 0:bfe6cbe4dd56 39
a1163480319 0:bfe6cbe4dd56 40
a1163480319 0:bfe6cbe4dd56 41 }
a1163480319 0:bfe6cbe4dd56 42
a1163480319 0:bfe6cbe4dd56 43 int main()
a1163480319 0:bfe6cbe4dd56 44 {
a1163480319 0:bfe6cbe4dd56 45 lcd.init();
a1163480319 0:bfe6cbe4dd56 46 mma8452.init(); // 100 Hz update rate, ±4g scale
a1163480319 0:bfe6cbe4dd56 47
a1163480319 0:bfe6cbe4dd56 48 float ain;
a1163480319 0:bfe6cbe4dd56 49 Acceleration acceleration; // Accleration structure declared in MMA8452 class
a1163480319 0:bfe6cbe4dd56 50
a1163480319 0:bfe6cbe4dd56 51
a1163480319 0:bfe6cbe4dd56 52 button.rise(&buttonPressed); // Use internal pullup for pushbutton
a1163480319 0:bfe6cbe4dd56 53
a1163480319 0:bfe6cbe4dd56 54
a1163480319 0:bfe6cbe4dd56 55 wait(.001);// Delay for initial pullup to take effect
a1163480319 0:bfe6cbe4dd56 56
a1163480319 0:bfe6cbe4dd56 57
a1163480319 0:bfe6cbe4dd56 58 while(1)
a1163480319 0:bfe6cbe4dd56 59 {
a1163480319 0:bfe6cbe4dd56 60
a1163480319 0:bfe6cbe4dd56 61 acceleration = mma8452.readValues();// read current values and print over serial port
a1163480319 0:bfe6cbe4dd56 62
a1163480319 0:bfe6cbe4dd56 63
a1163480319 0:bfe6cbe4dd56 64
a1163480319 0:bfe6cbe4dd56 65 //calculate the angle
a1163480319 0:bfe6cbe4dd56 66 float angleX = atan(acceleration.x/sqrt(pow(acceleration.y,2)+pow(acceleration.z,2)))*64;
a1163480319 0:bfe6cbe4dd56 67 float angleY = atan(acceleration.y/sqrt(pow(acceleration.x,2)+pow(acceleration.z,2)))*64;
a1163480319 0:bfe6cbe4dd56 68 float angleZ = atan(acceleration.z/sqrt(pow(acceleration.y,2)+pow(acceleration.x,2)))*64;
a1163480319 0:bfe6cbe4dd56 69
a1163480319 0:bfe6cbe4dd56 70
a1163480319 0:bfe6cbe4dd56 71
a1163480319 0:bfe6cbe4dd56 72 //store the acceleration data
a1163480319 0:bfe6cbe4dd56 73 char buffer1[14];
a1163480319 0:bfe6cbe4dd56 74 int length = sprintf(buffer1,"x = %.2f g",acceleration.x);
a1163480319 0:bfe6cbe4dd56 75 char buffer2[14];
a1163480319 0:bfe6cbe4dd56 76 length = sprintf(buffer2,"y = %.2f g",acceleration.y);
a1163480319 0:bfe6cbe4dd56 77 char buffer3[14];
a1163480319 0:bfe6cbe4dd56 78 length = sprintf(buffer3,"z = %.2f g",acceleration.z);
a1163480319 0:bfe6cbe4dd56 79
a1163480319 0:bfe6cbe4dd56 80
a1163480319 0:bfe6cbe4dd56 81
a1163480319 0:bfe6cbe4dd56 82
a1163480319 0:bfe6cbe4dd56 83 //store angle data
a1163480319 0:bfe6cbe4dd56 84 char buffer4[14];
a1163480319 0:bfe6cbe4dd56 85 length = sprintf(buffer4,"X=%.3gDegree",angleX);
a1163480319 0:bfe6cbe4dd56 86 char buffer5[14];
a1163480319 0:bfe6cbe4dd56 87 length = sprintf(buffer5,"Y=%.3gDegree",angleY);
a1163480319 0:bfe6cbe4dd56 88 char buffer6[14];
a1163480319 0:bfe6cbe4dd56 89 length = sprintf(buffer6,"Z=%.3gDegree",angleZ);
a1163480319 0:bfe6cbe4dd56 90 char buffer7[14];
a1163480319 0:bfe6cbe4dd56 91 length = sprintf(buffer7,"ACCELEROMETER");
a1163480319 0:bfe6cbe4dd56 92 char buffer8[14];
a1163480319 0:bfe6cbe4dd56 93 length = sprintf(buffer8,"PROTRACTOR");
a1163480319 0:bfe6cbe4dd56 94 char buffer9[14];
a1163480319 0:bfe6cbe4dd56 95 length = sprintf(buffer9,"Y");
a1163480319 0:bfe6cbe4dd56 96 char buffer10[14];
a1163480319 0:bfe6cbe4dd56 97 length = sprintf(buffer10,"X");
a1163480319 0:bfe6cbe4dd56 98
a1163480319 0:bfe6cbe4dd56 99
a1163480319 0:bfe6cbe4dd56 100
a1163480319 0:bfe6cbe4dd56 101
a1163480319 0:bfe6cbe4dd56 102 wait(0.1);
a1163480319 0:bfe6cbe4dd56 103 lcd.clear();
a1163480319 0:bfe6cbe4dd56 104
a1163480319 0:bfe6cbe4dd56 105
a1163480319 0:bfe6cbe4dd56 106
a1163480319 0:bfe6cbe4dd56 107 if (angleY>=90||angleY<=-90||angleX>=90||angleX<=-90){
a1163480319 0:bfe6cbe4dd56 108
a1163480319 0:bfe6cbe4dd56 109 buzzer.period(1/frequency); // set PWM period
a1163480319 0:bfe6cbe4dd56 110 buzzer=0.5; // set duty cycle
a1163480319 0:bfe6cbe4dd56 111
a1163480319 0:bfe6cbe4dd56 112
a1163480319 0:bfe6cbe4dd56 113 }
a1163480319 0:bfe6cbe4dd56 114
a1163480319 0:bfe6cbe4dd56 115
a1163480319 0:bfe6cbe4dd56 116 else
a1163480319 0:bfe6cbe4dd56 117 {
a1163480319 0:bfe6cbe4dd56 118 buzzer.period(1/frequency); // set PWM period
a1163480319 0:bfe6cbe4dd56 119 buzzer=0; // set duty cycle
a1163480319 0:bfe6cbe4dd56 120 }
a1163480319 0:bfe6cbe4dd56 121
a1163480319 0:bfe6cbe4dd56 122
a1163480319 0:bfe6cbe4dd56 123
a1163480319 0:bfe6cbe4dd56 124
a1163480319 0:bfe6cbe4dd56 125 switch(direction)//button case when pressed
a1163480319 0:bfe6cbe4dd56 126 {
a1163480319 0:bfe6cbe4dd56 127 case UP://first pressed
a1163480319 0:bfe6cbe4dd56 128 direction = 0;
a1163480319 0:bfe6cbe4dd56 129 lcd.printString(buffer7,4,0);
a1163480319 0:bfe6cbe4dd56 130 lcd.printString(buffer1,3,2);
a1163480319 0:bfe6cbe4dd56 131 lcd.printString(buffer2,3,3);
a1163480319 0:bfe6cbe4dd56 132 lcd.printString(buffer3,3,4);
a1163480319 0:bfe6cbe4dd56 133 break;
a1163480319 0:bfe6cbe4dd56 134
a1163480319 0:bfe6cbe4dd56 135 case DOWN://second pressed
a1163480319 0:bfe6cbe4dd56 136 direction = 1;
a1163480319 0:bfe6cbe4dd56 137 lcd.printString(buffer8,13,0);
a1163480319 0:bfe6cbe4dd56 138 lcd.printString(buffer4,3,2);
a1163480319 0:bfe6cbe4dd56 139 lcd.printString(buffer5,3,3);
a1163480319 0:bfe6cbe4dd56 140 lcd.printString(buffer6,3,4);
a1163480319 0:bfe6cbe4dd56 141 break;
a1163480319 0:bfe6cbe4dd56 142 case MID://third presssed
a1163480319 0:bfe6cbe4dd56 143 direction = 2;
a1163480319 0:bfe6cbe4dd56 144
a1163480319 0:bfe6cbe4dd56 145 // x0,y0,x1,y1,type 0-white,1-black,2-dotted
a1163480319 0:bfe6cbe4dd56 146 lcd.drawLine(0,23,83,23,1);
a1163480319 0:bfe6cbe4dd56 147
a1163480319 0:bfe6cbe4dd56 148 lcd.drawLine(41,0,41,48,1);
a1163480319 0:bfe6cbe4dd56 149
a1163480319 0:bfe6cbe4dd56 150 lcd.drawLine(64,0,17,47,1);
a1163480319 0:bfe6cbe4dd56 151
a1163480319 0:bfe6cbe4dd56 152 lcd.drawLine(18,0,65,47,1);
a1163480319 0:bfe6cbe4dd56 153
a1163480319 0:bfe6cbe4dd56 154 lcd.drawCircle(41,23,13,0); // x,y,radius,black fill
a1163480319 0:bfe6cbe4dd56 155 lcd.drawCircle(41,23,25,0);
a1163480319 0:bfe6cbe4dd56 156
a1163480319 0:bfe6cbe4dd56 157
a1163480319 0:bfe6cbe4dd56 158 if (angleX<0||angleY>0){ //move right and forward
a1163480319 0:bfe6cbe4dd56 159
a1163480319 0:bfe6cbe4dd56 160
a1163480319 0:bfe6cbe4dd56 161 lcd.setPixel(41-angleX/3.6,23+angleY/3.6);
a1163480319 0:bfe6cbe4dd56 162 lcd.setPixel(41-angleX/3.6,22+angleY/3.6);
a1163480319 0:bfe6cbe4dd56 163 lcd.setPixel(41-angleX/3.6,24+angleY/3.6);
a1163480319 0:bfe6cbe4dd56 164 lcd.setPixel(42-angleX/3.6,23+angleY/3.6);
a1163480319 0:bfe6cbe4dd56 165 lcd.setPixel(40-angleX/3.6,23+angleY/3.6);
a1163480319 0:bfe6cbe4dd56 166
a1163480319 0:bfe6cbe4dd56 167 }
a1163480319 0:bfe6cbe4dd56 168 lcd.refresh();
a1163480319 0:bfe6cbe4dd56 169
a1163480319 0:bfe6cbe4dd56 170
a1163480319 0:bfe6cbe4dd56 171
a1163480319 0:bfe6cbe4dd56 172
a1163480319 0:bfe6cbe4dd56 173 if (angleX>0||angleY>0) //move left and backward
a1163480319 0:bfe6cbe4dd56 174 {
a1163480319 0:bfe6cbe4dd56 175 lcd.setPixel(41-angleX/3.6,23+angleY/3.6);
a1163480319 0:bfe6cbe4dd56 176 lcd.setPixel(41-angleX/3.6,22+angleY/3.6);
a1163480319 0:bfe6cbe4dd56 177 lcd.setPixel(41-angleX/3.6,24+angleY/3.6);
a1163480319 0:bfe6cbe4dd56 178 lcd.setPixel(40-angleX/3.6,23+angleY/3.6);
a1163480319 0:bfe6cbe4dd56 179 lcd.setPixel(42-angleX/3.6,23+angleY/3.6);
a1163480319 0:bfe6cbe4dd56 180
a1163480319 0:bfe6cbe4dd56 181 lcd.refresh();
a1163480319 0:bfe6cbe4dd56 182
a1163480319 0:bfe6cbe4dd56 183 }
a1163480319 0:bfe6cbe4dd56 184
a1163480319 0:bfe6cbe4dd56 185
a1163480319 0:bfe6cbe4dd56 186 lcd.printString(buffer9,35,0);
a1163480319 0:bfe6cbe4dd56 187 lcd.printString(buffer10,75,2);
a1163480319 0:bfe6cbe4dd56 188
a1163480319 0:bfe6cbe4dd56 189 break;
a1163480319 0:bfe6cbe4dd56 190
a1163480319 0:bfe6cbe4dd56 191
a1163480319 0:bfe6cbe4dd56 192 default:
a1163480319 0:bfe6cbe4dd56 193
a1163480319 0:bfe6cbe4dd56 194 break;
a1163480319 0:bfe6cbe4dd56 195
a1163480319 0:bfe6cbe4dd56 196 }
a1163480319 0:bfe6cbe4dd56 197
a1163480319 0:bfe6cbe4dd56 198
a1163480319 0:bfe6cbe4dd56 199
a1163480319 0:bfe6cbe4dd56 200 ain = pot.read(); /* Read analog value (output will be any value between 0 and 1 */
a1163480319 0:bfe6cbe4dd56 201
a1163480319 0:bfe6cbe4dd56 202
a1163480319 0:bfe6cbe4dd56 203 lcd.setBrightness(ain); //tune the screen brightness
a1163480319 0:bfe6cbe4dd56 204 lcd.refresh();
a1163480319 0:bfe6cbe4dd56 205
a1163480319 0:bfe6cbe4dd56 206
a1163480319 0:bfe6cbe4dd56 207 }
a1163480319 0:bfe6cbe4dd56 208 }
a1163480319 0:bfe6cbe4dd56 209