gesture detection Test-Program

#include "mbed.h"
#include "SparkFun_APDS9960.h"
#include "SFE_MicroOLED.h"

// Constants

// Global Variables and forward declarations
InterruptIn apds_int(P1_24);
SPI my_spi(P0_9, P0_8, P1_29);
MicroOLED uView(my_spi, P2_3, P1_28, P1_25);
I2C my_i2c(P0_5, P0_4);
SparkFun_APDS9960 apds = SparkFun_APDS9960(my_i2c);
volatile int isr_flag = 0;

void interruptRoutine();
void handleGesture();
void drawArrowUp();
void drawArrowDown();
void drawArrowLeft();
void drawArrowRight();
void drawCircle();
void drawX();

int main() {
  
  // Initialize MicroView
  uView.init(0, 8000000);
  uView.clear(PAGE);
  
  // Initialize interrupt service routine
  apds_int.mode(PullUp);
  apds_int.fall(&interruptRoutine);
  apds_int.disable_irq();
  
  uView.setFontType(0);
  wait_ms(500);
  
  // Initialize APDS-9960 (configure I2C and initial values)
  if ( apds.init(400000) ) {
    uView.puts("INIT OK!\n");
  } else {
    uView.puts("I-ERROR!\n");
  }
  
  // Start running the gesture sensor engine (with interrupts)
  if ( apds.enableGestureSensor(true) ) {
    uView.puts("Gest OK!");
  } else {
    uView.puts("G-ERROR!");
  }
  
  uView.display();
  
  // Wait for initialization and calibration to finish
  wait_ms(2000);
  
  uView.clear(PAGE);
  
  // Draw title
  uView.setCursor(16, 0);
  uView.puts("Swipe!");
  uView.display();
  
  apds_int.enable_irq();

  while(1) {
  
    // If interrupt, display gesture on MicroOLED
    if( isr_flag == 1 ) {
      apds_int.disable_irq();
      handleGesture();
      isr_flag = 0;
      wait_ms(500);
      uView.display();
      apds_int.enable_irq();
    }
  
    // Wait before next reading
    wait_ms(100);
  }
}

void interruptRoutine() {
  isr_flag = 1;
}

void handleGesture() {
  bool do_clear = true;
  
  // Draw symbol based on gesture
  if ( apds.isGestureAvailable() ) {
    switch ( apds.readGesture() ) {
      case DIR_UP:
        drawArrowUp();
        break;
      case DIR_DOWN:
        drawArrowDown();
        break;
      case DIR_LEFT:
        drawArrowLeft();
        break;
      case DIR_RIGHT:
        drawArrowRight();
        break;
      case DIR_NEAR:
        drawCircle();
        break;
      case DIR_FAR:
        drawX();
        break;
      default:
        do_clear = false;
    }
  }
  
  // Let symbol sit on screen for a while, then clear
  if ( do_clear ) {
    uView.clear(PAGE);
    uView.setCursor(16, 0);
    uView.puts("Swipe!");
  }
}

void drawArrowUp() {
  uView.clear(PAGE);
  uView.line(27, 43, 37, 43);  // Bottom: over 10
  uView.line(27, 43, 27, 18);  // Legs: Up 25
  uView.line(37, 43, 37, 18);  // Legs: Up 25
  uView.line(27, 18, 17, 18);  // Head: Over 10
  uView.line(37, 18, 47, 18);  // Head: Over 10
  uView.line(17, 18, 32, 3);   // Tip: Over 14, up 15
  uView.line(47, 18, 32, 3);   // Tip: Over 14, up 15
  uView.display();
}

void drawArrowDown() {
  uView.clear(PAGE);
  uView.line(27, 5, 37, 5);  // Bottom: over 10
  uView.line(27, 5, 27, 30);  // Legs: Up 25
  uView.line(37, 5, 37, 30);  // Legs: Up 25
  uView.line(27, 30, 17, 30);  // Head: Over 10
  uView.line(37, 30, 47, 30);  // Head: Over 10
  uView.line(17, 30, 32, 45);   // Tip: Over 14, up 15
  uView.line(47, 30, 32, 45);   // Tip: Over 14, up 15
  uView.display();
}

void drawArrowLeft() {
  uView.clear(PAGE);
  uView.line(52, 19, 52, 29);  // Bottom: up 10
  uView.line(52, 19, 27, 19);  // Legs: over 25
  uView.line(52, 29, 27, 29);  // Legs: over 25
  uView.line(27, 19, 27, 9);   // Head: up 10
  uView.line(27, 29, 27, 39);  // Head: down 10
  uView.line(27, 9, 12, 24);   // Tip: over 15, down 14
  uView.line(27, 39, 12, 24);  // Tip: over 15, down 14
  uView.display();
}

void drawArrowRight() {
  uView.clear(PAGE);
  uView.line(12, 19, 12, 29);  // Bottom: up 10
  uView.line(12, 19, 37, 19);  // Legs: over 25
  uView.line(12, 29, 37, 29);  // Legs: over 25
  uView.line(37, 19, 37, 9);   // Head: up 10
  uView.line(37, 29, 37, 39);  // Head: down 10
  uView.line(37, 9, 53, 25);   // Tip: over 15, down 14
  uView.line(37, 39, 52, 24);  // Tip: over 15, down 14
  uView.display();
}

void drawCircle() {
  uView.clear(PAGE);
  uView.circle(32, 24, 20);
  uView.display();
}

void drawX() {
  uView.clear(PAGE);
  uView.line(12, 4, 52, 44);
  uView.line(12, 44, 52, 4);
  uView.display();
}