Interfacing TCRT5000 IR Emitter/Detector Pair with TM4C
In this example, we going to have TCRT5000 IR Emitter/Detector pair as an input , an LED and a DC motor as outputs. The way the code works is, if a an object is placed within the sensing range of the IR sensor, the LED turns on and the DC motor starts to rotate. This pieced of code is part of a bigger code written to control a line following robot. We shall discuss how to build and program this robot in future lessons.
Program
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 | //Digital sensor//Author :cortex-m.com//Function: Interfacing TCRT5000 IR module as a digital sensor#include "TM4C123.h" // Device header#include <stdint.h>#define DETECTOR (1U<<4)#define LED_BLUE (1U<<2)#define MOTOR (1U<<6) unint_32 state=0; void Port_init(void); int main(void) { Port_init(); while(1){ if((GPIOA -> DATA & DETECTOR)==DETECTOR) { state = 0; GPIOF ->DATA &= ~LED_BLUE; GPIOA ->DATA &= ~MOTOR; } else { state =1; GPIOF -> DATA |=LED_BLUE; GPIOA -> DATA |=MOTOR ; }}}void Port_init(void){ SYSCTL->RCGCGPIO |=(1U<<0)|(1U<<5); GPIOF ->DIR |=LED_BLUE; GPIOF ->DEN |=LED_BLUE; GPIOA ->DR8R |=MOTOR; GPIOA ->DIR |=MOTOR; GPIOA -> DEN |=DETECTOR|MOTOR ;} |