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edsparkedspark
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Adds some examples that will be rolled in shortly
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‎Arduino/HC-SR04_UltrasonicSensorExample/HC-SR04_UltrasonicSensorExample.ino‎

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/**
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* HC-SR04 Demo
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* Demonstration of the HC-SR04 Ultrasonic Sensor
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* Date: August 3, 2016
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*
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* Description:
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* Connect the ultrasonic sensor to the Arduino as per the
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* hardware connections below. Run the sketch and open a serial
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* monitor. The distance read from the sensor will be displayed
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* in centimeters and inches.
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*
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* Hardware Connections:
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* Arduino | HC-SR04
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* -------------------
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* 5V | VCC
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* 7 | Trig
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* 8 | Echo
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* GND | GND
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*
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* License:
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* Public Domain
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*/
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#include <Wire.h>
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#include <Adafruit_GFX.h>
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#include <Adafruit_SSD1306.h>
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// Pins
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const int TRIG_PIN = 7;
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const int ECHO_PIN = 8;
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// Anything over 400 cm (23200 us pulse) is "out of range"
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const unsigned int MAX_DIST = 23200;
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#define OLED_RESET 4
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Adafruit_SSD1306 display(OLED_RESET);
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#define NUMFLAKES 10
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#define XPOS 0
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#define YPOS 1
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#define DELTAY 2
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#define LOGO16_GLCD_HEIGHT 16
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#define LOGO16_GLCD_WIDTH 16
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static const unsigned char PROGMEM logo16_glcd_bmp[] =
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{ B00000000, B11000000,
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B00000001, B11000000,
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B00000001, B11000000,
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B00000011, B11100000,
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B11110011, B11100000,
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B11111110, B11111000,
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B01111110, B11111111,
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B00110011, B10011111,
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B00011111, B11111100,
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B00001101, B01110000,
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B00011011, B10100000,
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B00111111, B11100000,
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B00111111, B11110000,
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B01111100, B11110000,
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B01110000, B01110000,
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B00000000, B00110000 };
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#if (SSD1306_LCDHEIGHT != 32)
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#error("Height incorrect, please fix Adafruit_SSD1306.h!");
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#endif
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void setup() {
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// The Trigger pin will tell the sensor to range find
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pinMode(TRIG_PIN, OUTPUT);
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digitalWrite(TRIG_PIN, LOW);
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// We'll use the serial monitor to view the sensor output
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Serial.begin(9600);
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display.begin(SSD1306_SWITCHCAPVCC, 0x3C); // initialize with the I2C addr 0x3C (for the 128x32)
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display.clearDisplay();
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}
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void loop() {
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unsigned long t1;
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unsigned long t2;
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unsigned long pulse_width;
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float cm;
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float inches;
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// Hold the trigger pin high for at least 10 us
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digitalWrite(TRIG_PIN, HIGH);
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delayMicroseconds(50);
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digitalWrite(TRIG_PIN, LOW);
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// Wait for pulse on echo pin
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while ( digitalRead(ECHO_PIN) == 0 );
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// Measure how long the echo pin was held high (pulse width)
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// Note: the micros() counter will overflow after ~70 min
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t1 = micros();
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while ( digitalRead(ECHO_PIN) == 1);
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t2 = micros();
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pulse_width = t2 - t1;
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// Calculate distance in centimeters and inches. The constants
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// are found in the datasheet, and calculated from the assumed speed
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//of sound in air at sea level (~340 m/s).
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cm = pulse_width / 58.0;
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inches = pulse_width / 148.0;
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// Print out results
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if ( pulse_width > MAX_DIST ) {
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Serial.println("Out of range");
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} else {
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Serial.print(cm);
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Serial.print(" cm \t");
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Serial.print(inches);
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Serial.println(" in");
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display.setTextSize(2);
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display.setTextColor(WHITE);
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display.setCursor(10,0);
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display.clearDisplay();
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display.print(cm);
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display.print("cm");
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display.display();
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delay(1);
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}
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// Wait at least 60ms before next measurement
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delay(60);
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}
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void testdrawbitmap(const uint8_t *bitmap, uint8_t w, uint8_t h) {
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uint8_t icons[NUMFLAKES][3];
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// initialize
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for (uint8_t f=0; f< NUMFLAKES; f++) {
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icons[f][XPOS] = random(display.width());
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icons[f][YPOS] = 0;
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icons[f][DELTAY] = random(5) + 1;
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Serial.print("x: ");
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Serial.print(icons[f][XPOS], DEC);
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Serial.print(" y: ");
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Serial.print(icons[f][YPOS], DEC);
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Serial.print(" dy: ");
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Serial.println(icons[f][DELTAY], DEC);
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}
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while (1) {
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// draw each icon
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for (uint8_t f=0; f< NUMFLAKES; f++) {
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display.drawBitmap(icons[f][XPOS], icons[f][YPOS], bitmap, w, h, WHITE);
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}
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display.display();
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delay(200);
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// then erase it + move it
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for (uint8_t f=0; f< NUMFLAKES; f++) {
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display.drawBitmap(icons[f][XPOS], icons[f][YPOS], bitmap, w, h, BLACK);
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// move it
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icons[f][YPOS] += icons[f][DELTAY];
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// if its gone, reinit
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if (icons[f][YPOS] > display.height()) {
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icons[f][XPOS] = random(display.width());
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icons[f][YPOS] = 0;
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icons[f][DELTAY] = random(5) + 1;
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}
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}
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}
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}
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void testdrawchar(void) {
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display.setTextSize(1);
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display.setTextColor(WHITE);
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display.setCursor(0,0);
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for (uint8_t i=0; i < 168; i++) {
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if (i == '\n') continue;
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display.write(i);
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if ((i > 0) && (i % 21 == 0))
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display.println();
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}
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display.display();
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delay(1);
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}
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void testdrawcircle(void) {
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for (int16_t i=0; i<display.height(); i+=2) {
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display.drawCircle(display.width()/2, display.height()/2, i, WHITE);
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display.display();
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delay(1);
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}
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}
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void testfillrect(void) {
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uint8_t color = 1;
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for (int16_t i=0; i<display.height()/2; i+=3) {
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// alternate colors
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display.fillRect(i, i, display.width()-i*2, display.height()-i*2, color%2);
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display.display();
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delay(1);
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color++;
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}
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}
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void testdrawtriangle(void) {
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for (int16_t i=0; i<min(display.width(),display.height())/2; i+=5) {
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display.drawTriangle(display.width()/2, display.height()/2-i,
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display.width()/2-i, display.height()/2+i,
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display.width()/2+i, display.height()/2+i, WHITE);
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display.display();
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delay(1);
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}
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}
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void testfilltriangle(void) {
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uint8_t color = WHITE;
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for (int16_t i=min(display.width(),display.height())/2; i>0; i-=5) {
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display.fillTriangle(display.width()/2, display.height()/2-i,
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display.width()/2-i, display.height()/2+i,
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display.width()/2+i, display.height()/2+i, WHITE);
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if (color == WHITE) color = BLACK;
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else color = WHITE;
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display.display();
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delay(1);
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}
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}
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void testdrawroundrect(void) {
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for (int16_t i=0; i<display.height()/2-2; i+=2) {
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display.drawRoundRect(i, i, display.width()-2*i, display.height()-2*i, display.height()/4, WHITE);
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display.display();
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delay(1);
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}
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}
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void testfillroundrect(void) {
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uint8_t color = WHITE;
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for (int16_t i=0; i<display.height()/2-2; i+=2) {
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display.fillRoundRect(i, i, display.width()-2*i, display.height()-2*i, display.height()/4, color);
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if (color == WHITE) color = BLACK;
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else color = WHITE;
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display.display();
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delay(1);
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}
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}
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void testdrawrect(void) {
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for (int16_t i=0; i<display.height()/2; i+=2) {
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display.drawRect(i, i, display.width()-2*i, display.height()-2*i, WHITE);
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display.display();
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delay(1);
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}
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}
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void testdrawline() {
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for (int16_t i=0; i<display.width(); i+=4) {
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display.drawLine(0, 0, i, display.height()-1, WHITE);
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display.display();
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delay(1);
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}
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for (int16_t i=0; i<display.height(); i+=4) {
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display.drawLine(0, 0, display.width()-1, i, WHITE);
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display.display();
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delay(1);
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}
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delay(250);
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display.clearDisplay();
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for (int16_t i=0; i<display.width(); i+=4) {
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display.drawLine(0, display.height()-1, i, 0, WHITE);
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display.display();
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delay(1);
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}
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for (int16_t i=display.height()-1; i>=0; i-=4) {
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display.drawLine(0, display.height()-1, display.width()-1, i, WHITE);
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display.display();
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delay(1);
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}
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delay(250);
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display.clearDisplay();
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for (int16_t i=display.width()-1; i>=0; i-=4) {
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display.drawLine(display.width()-1, display.height()-1, i, 0, WHITE);
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display.display();
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delay(1);
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}
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for (int16_t i=display.height()-1; i>=0; i-=4) {
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display.drawLine(display.width()-1, display.height()-1, 0, i, WHITE);
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display.display();
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delay(1);
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}
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delay(250);
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display.clearDisplay();
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for (int16_t i=0; i<display.height(); i+=4) {
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display.drawLine(display.width()-1, 0, 0, i, WHITE);
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display.display();
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delay(1);
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}
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for (int16_t i=0; i<display.width(); i+=4) {
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display.drawLine(display.width()-1, 0, i, display.height()-1, WHITE);
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display.display();
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delay(1);
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}
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delay(250);
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}
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void testscrolltext(void) {
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display.setTextSize(2);
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display.setTextColor(WHITE);
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display.setCursor(10,0);
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display.clearDisplay();
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display.println("scroll");
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display.display();
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delay(1);
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display.startscrollright(0x00, 0x0F);
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delay(2000);
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display.stopscroll();
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delay(1000);
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display.startscrollleft(0x00, 0x0F);
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delay(2000);
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display.stopscroll();
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delay(1000);
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display.startscrolldiagright(0x00, 0x07);
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delay(2000);
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display.startscrolldiagleft(0x00, 0x07);
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delay(2000);
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display.stopscroll();
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}
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‎Arduino/HC-SR04_UltrasonicSensorExample/desktop.ini‎

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[.ShellClassInfo]
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InfoTip=This folder is shared online.
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IconFile=C:\Program Files\Google\Drive\googledrivesync.exe
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IconIndex=16
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‎Arduino/desktop.ini‎

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[.ShellClassInfo]
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InfoTip=This folder is shared online.
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IconFile=C:\Program Files\Google\Drive\googledrivesync.exe
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IconIndex=16
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