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main.cpp
- Committer:
- resetar
- Date:
- 2018-01-17
- Revision:
- 1:290c6681a06a
- Parent:
- 0:23662f0a15af
File content as of revision 1:290c6681a06a:
#include "mbed.h" /** Initial test of the ultrasonic sensor HC-SR04 */ #include "TextLCD.h" #include "KEY_PAD.h" TextLCD lcd(p7, p8, p9, p10, p11, p12); InterruptIn echo(p5); // echo pin DigitalOut trigger(p6); // trigger pin Timer timer; // echo pulsewidth measurement Timer timer2; float brzina=0; float predzadnji; float vrijeme=0; float distance = 0; DigitalOut led1(p28);//crveno DigitalOut led2(p29); DigitalOut led3(p30); /** Start the echo pulsewidth measurement */ void startTimer() { timer.start(); // start the timer } /** Stop the echo pulsewidth measurement */ void stopTimer() { timer.stop(); // stop the timer } Ticker debounce; void enable_keys(){ red1.fall(&get_row1); red2.fall(&get_row2); red3.fall(&get_row3); red4.fall(&get_row4); debounce.detach(); } int main() { /** configure the rising edge to start the timer */ echo.rise(&startTimer); /** configure the falling edge to stop the timer */ echo.fall(&stopTimer); timer2.start(); led1=0; led2=0; led3=1; stupci.mode(OpenDrain); stupci.mode(PullUp); red1.mode(PullUp); red2.mode(PullUp); red3.mode(PullUp); red4.mode(PullUp); red1.fall(&get_row1); red2.fall(&get_row2); red3.fall(&get_row3); red4.fall(&get_row4); while(1) { if(red1 == 1 && red2 == 1 && red3 == 1 && red4 == 1){ if(key>0){ izlaz=key; //pc.printf("\n\r %d", code); __enable_irq(); debounce.attach(&enable_keys, 0.5); //////////////////////////////// } key=0; wait_ms(100); } switch(pass_code){ case(0): lcd.locate(0,3); lcd.printf("Unesite mod rada"); break; case(123): /** Start the measurement by sending the 10us trigger pulse */ trigger = 1; wait_us(10); trigger = 0; /** Wait for the sensor to finish measurement (generate rise and fall interrupts). * Minimum wait time is determined by maximum measurement distance of 400 cm. * t_min = 400 * 58 = 23200 us = 23.2 ms */ wait(0.2); predzadnji=distance; /** calculate the distance in cm */ distance = timer.read() * 1e6 / 58; timer.reset(); // reset the timer to 0 brzina=(distance-predzadnji)/(timer2.read()-vrijeme); timer2.reset(); timer2.start(); vrijeme=timer2.read(); /** Print the result in cm to the terminal with 1 decimal place * (number 5 after % means that total of 5 digits will be reserved * for printing the number, including the dot and one decimal place). */ if (brzina>=20) { lcd.cls(); lcd.locate(0,0); lcd.printf("Daljina:%5.1f cm", distance); lcd.locate(0,1); lcd.printf("Brzina:%5.1f cm/s",brzina); lcd.locate(0,2); lcd.printf("Palim crveno!!!"); led3=0; led2=1; wait(3); led2=0; led1=1; wait(10); led2=1; wait(4); led3=1; led1=0; led2=0; } else if (brzina < 20 && brzina >5) { lcd.cls(); lcd.locate(0,0); lcd.printf("Daljina:%5.1f cm", distance); lcd.locate(0,1); lcd.printf("Brzina:%5.1f cm/s",brzina); lcd.locate(0,2); lcd.printf("Usporite!"); wait(2); } else { lcd.cls(); lcd.locate(0,0); lcd.printf("Daljina:%5.1f cm", distance); lcd.locate(0,1); lcd.printf("Brzina:%5.1f cm/s",brzina); lcd.locate(0,2); lcd.printf("OK"); } break; case(456): lcd.cls(); lcd.locate(0,3); lcd.printf(" %d", pass_code); break; case(789): lcd.cls(); lcd.locate(0,3); lcd.printf(" %d", pass_code); break; } } }