mbed Starter Kit / mbed Starter Kit Demo Programs

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ulcd_accel/main.cpp@0:6a73d3dc037e, 2014-07-28 (annotated)

Committer:
ShawnHymel
Date:
Mon Jul 28 20:29:28 2014 +0000
Revision:
0:6a73d3dc037e
Added main.cpp files from each of the demo programs. Libraries are not included.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
ShawnHymel 0:6a73d3dc037e 1 // Demo for the uLCD-144-G2 and MMA8452Q 3-axis accelerometer
ShawnHymel 0:6a73d3dc037e 2
ShawnHymel 0:6a73d3dc037e 3 #include "mbed.h"
ShawnHymel 0:6a73d3dc037e 4 #include "MMA8452Q.h"
ShawnHymel 0:6a73d3dc037e 5 #include "uLCD_4DGL.h"
ShawnHymel 0:6a73d3dc037e 6
ShawnHymel 0:6a73d3dc037e 7 // Graphic LCD - TX, RX, and RES pins
ShawnHymel 0:6a73d3dc037e 8 uLCD_4DGL uLCD(p9,p10,p11);
ShawnHymel 0:6a73d3dc037e 9
ShawnHymel 0:6a73d3dc037e 10 // Accelerometer - SDA, SCL, and I2C address
ShawnHymel 0:6a73d3dc037e 11 MMA8452Q accel(p28, p27, 0x1D);
ShawnHymel 0:6a73d3dc037e 12
ShawnHymel 0:6a73d3dc037e 13 int main() {
ShawnHymel 0:6a73d3dc037e 14
ShawnHymel 0:6a73d3dc037e 15 // Initialize uLCD
ShawnHymel 0:6a73d3dc037e 16 uLCD.baudrate(115200);
ShawnHymel 0:6a73d3dc037e 17 uLCD.background_color(BLACK);
ShawnHymel 0:6a73d3dc037e 18 uLCD.cls();
ShawnHymel 0:6a73d3dc037e 19
ShawnHymel 0:6a73d3dc037e 20 // Initialize accelerometer
ShawnHymel 0:6a73d3dc037e 21 accel.init();
ShawnHymel 0:6a73d3dc037e 22
ShawnHymel 0:6a73d3dc037e 23 // Initial parameters for the circle
ShawnHymel 0:6a73d3dc037e 24 float x = 64;
ShawnHymel 0:6a73d3dc037e 25 float y = 64;
ShawnHymel 0:6a73d3dc037e 26 int radius = 4;
ShawnHymel 0:6a73d3dc037e 27 int speed = 4;
ShawnHymel 0:6a73d3dc037e 28
ShawnHymel 0:6a73d3dc037e 29 // Make a ball "fall" in direction of accelerometer
ShawnHymel 0:6a73d3dc037e 30 while (1) {
ShawnHymel 0:6a73d3dc037e 31
ShawnHymel 0:6a73d3dc037e 32 // Draw a red circle
ShawnHymel 0:6a73d3dc037e 33 uLCD.filled_circle((int)x, (int)y, radius, RED);
ShawnHymel 0:6a73d3dc037e 34
ShawnHymel 0:6a73d3dc037e 35 // Wait before erasing old circle
ShawnHymel 0:6a73d3dc037e 36 wait(0.02); // In seconds
ShawnHymel 0:6a73d3dc037e 37
ShawnHymel 0:6a73d3dc037e 38 // Erase old circle
ShawnHymel 0:6a73d3dc037e 39 uLCD.filled_circle((int)x, (int)y, radius, BLACK);
ShawnHymel 0:6a73d3dc037e 40
ShawnHymel 0:6a73d3dc037e 41 // Move circle. IMPORTANT! Notice how we adjust for sensor orientation!
ShawnHymel 0:6a73d3dc037e 42 x -= (speed * accel.readY());
ShawnHymel 0:6a73d3dc037e 43 y -= (speed * accel.readX());
ShawnHymel 0:6a73d3dc037e 44
ShawnHymel 0:6a73d3dc037e 45 // Make circle sit on edges
ShawnHymel 0:6a73d3dc037e 46 if ( x <= radius + 1 ) {
ShawnHymel 0:6a73d3dc037e 47 x = radius + 1;
ShawnHymel 0:6a73d3dc037e 48 } else if ( x >= 126 - radius ) {
ShawnHymel 0:6a73d3dc037e 49 x = 126 - radius;
ShawnHymel 0:6a73d3dc037e 50 }
ShawnHymel 0:6a73d3dc037e 51 if ( y <= radius + 1 ) {
ShawnHymel 0:6a73d3dc037e 52 y = radius + 1;
ShawnHymel 0:6a73d3dc037e 53 } else if ( y >= 126 - radius ) {
ShawnHymel 0:6a73d3dc037e 54 y = 126 - radius;
ShawnHymel 0:6a73d3dc037e 55 }
ShawnHymel 0:6a73d3dc037e 56 }
ShawnHymel 0:6a73d3dc037e 57 }