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OCE360 HW#4 Solution Example
Dependencies: 4DGL-uLCD-SE MMA8452Q bouncing_ball mbed
Fork of OCE360_4 by
Diff: main.cpp
- Revision:
- 2:552e6feb8709
- Parent:
- 1:6b99ffa62cc8
- Child:
- 3:a7f02754bc99
diff -r 6b99ffa62cc8 -r 552e6feb8709 main.cpp --- a/main.cpp Tue Oct 24 12:34:19 2017 +0000 +++ b/main.cpp Tue Nov 07 12:07:36 2017 +0000 @@ -1,25 +1,36 @@ -// Demo for the uLCD-144-G2 and MMA8452Q 3-axis accelerometer +// A solution to OCE360 Homework #4. +// Objective: Use object oriented programming to create a system that displays +// multiple balls bouncing around the LCD screen. #include "mbed.h" -#include "MMA8452Q.h" -#include "uLCD_4DGL.h" -#include "bouncing_ball.h" +#include "MMA8452Q.h" //acceleromater library +#include "uLCD_4DGL.h" //LCD library +#include "bouncing_ball.h" //new ball phyics library -#define INIT_RADIUS 10 -#define INIT_COLOR 1 +#define UPDATE_TIME_S 0.02 +#define START_X_1 10 +#define START_Y_1 10 +#define START_X_2 20 +#define START_Y_2 20 +#define RADIUS_1 6 +#define RADIUS_2 3 -//#include "bouncing_ball.h" +#define DEBUG_MODE 0 + +//Function prototype for color selection function: +int get_LCD_color(int color_integer); // Graphic LCD - TX, RX, and RES pins -uLCD_4DGL uLCD(p9,p10,p11); +uLCD_4DGL uLCD(p9,p10,p11); //initialize a driver object for an LCD connected on pins 9-11 // Accelerometer - SDA, SCL, and I2C address -MMA8452Q accel(p28, p27, 0x1D); +MMA8452Q accel(p28, p27, 0x1D); //initialize a driver object for an accelerometer connected on pins 27-28. -physics_ball ball1(INIT_COLOR,INIT_RADIUS); +physics_ball ball1; //initialize two balls for bouncing +physics_ball ball2; //the default states from the library will be used initially -int main() { - +int main() +{ // Initialize uLCD uLCD.baudrate(115200); uLCD.background_color(BLACK); @@ -28,18 +39,58 @@ // Initialize accelerometer accel.init(); - //Initiailize ball - - // Make a ball "fall" in direction of accelerometer - while (1) { + //Initialize balls: + ball1.set_state(START_X_1,START_Y_1,0,0); //speeds are set to zero + ball1.set_state(START_X_2,START_Y_2,0,0); + + //Set ball radius and color: + ball1.set_param(RADIUS_1,0); //color is unimportant + ball2.set_param(RADIUS_2,1); //just making sure the colors are different + + /* Make the balls "fall" in direction of accelerometer by forcing the ball objects + to update themselves at regular intervals, and te drawing the locations reported + by the ball objects on the LCD screen: */ + while (1) { //execute 'forever' + // Draw a red circle using the x and y positions stored by the object 'ball1': + uLCD.filled_circle(ball1.posx, ball1.posy, ball1.radius, get_LCD_color(ball1.color)); + // Draw a blue circle using the x and y positions stored by the object 'ball2': + uLCD.filled_circle(ball2.posx, ball2.posy, ball2.radius, get_LCD_color(ball2.color)); + + // Wait before erasing old circles: + wait(UPDATE_TIME_S); // In seconds + + // Erase old circles by writing over there locations using the screen color: + uLCD.filled_circle(ball1.posx, ball1.posy, ball1.radius, BLACK); + uLCD.filled_circle(ball2.posx, ball2.posy, ball2.radius, BLACK); - // Draw a red circle - uLCD.filled_circle((int)ball1.posx, (int)ball1.posy, ball1.radius, RED); + // Force the objects 'ball1' and 'ball2' to update their stored positions + // and velocities: + ball1.update(UPDATE_TIME_S,accel); + ball2.update(UPDATE_TIME_S,accel); + + if (DEBUG_MODE) { + uLCD.locate(0,4); + uLCD.printf("X: %d.1\nY: %.1d",ball1.posx,ball1.posy); + + uLCD.locate(0,6); + uLCD.printf("VX: %f.1\nVY: %.1f",ball1.speedx,ball1.speedy); - // Wait before erasing old circle - wait(0.02); // In seconds + uLCD.locate(0,10); + uLCD.printf("AX: %f.1\nAY: %.1f\nAZ: %0.1f",accel.readX(),accel.readY(),accel.readZ()); + } + } +} - // Erase old circle - uLCD.filled_circle((int)ball1.posx, (int)ball1.posy, ball1.radius, BLACK); +int get_LCD_color(int color_integer) +{ + switch (color_integer) { + case 0: + return(RED); + case 1: + return(BLUE); + case 2: + return(GREEN); + default: + return(WHITE); } } \ No newline at end of file