Revision 0:586f8f975b8c, committed 2022-06-28

Comitter:

AlexisCollin

Date:

Tue Jun 28 14:00:35 2022 +0000

Commit message:

efrei;

Changed in this revision

diff -r 000000000000 -r 586f8f975b8c HCSR04.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/HCSR04.cpp	Tue Jun 28 14:00:35 2022 +0000
@@ -0,0 +1,30 @@
+#include "HCSR04.h"
+#include "mbed.h"
+ 
+ 
+HCSR04::HCSR04(PinName trigger, PinName echo) : _t(trigger), _e(echo) {
+    wait(0.1);
+    }
+ 
+float HCSR04::getCm(void){
+    distcm = readEcho()/58;
+    return distcm;
+    }
+ 
+float HCSR04::getIn(void){
+    distin = readEcho()/148;
+    return distin;
+    }
+ 
+float HCSR04::readEcho(void){     
+    _t=1;                       //Inicio do trigger
+    wait_us(10);                //10us de pulso
+    _t=0;                       //Fim do trigger
+    while(!_e);
+    _tempo.start();
+    while(_e);
+    tdist = _tempo.read_us();   //Leitura do tempo transcorrido 
+    _tempo.stop();              //Paro o temporizador
+    _tempo.reset();             //Reset para o próximo ciclo
+    return tdist;
+}
\ No newline at end of file

diff -r 000000000000 -r 586f8f975b8c HCSR04.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/HCSR04.h	Tue Jun 28 14:00:35 2022 +0000
@@ -0,0 +1,65 @@
+#ifndef HCSR04_H
+#define HCSR04_H
+ 
+#include "mbed.h"
+ 
+ 
+ 
+/** 
+ * Sonar HC-SR04 example.
+ * @code
+ * #include "mbed.h"
+ * #include "HCSR04.h"
+ *
+ * DigitalOut myled(LED1);
+ * Serial pc(USBTX,USBRX);     
+ *
+ * HCSR04 sonar(PTD5, PTA13);
+ *
+ * int main() {
+ *     while(1) {
+ *         printf("Distancia detectada pelo sensor Frente %.2f cm \n", sonar.getCm()); 
+ *         wait_ms(1000);
+ *     }
+ * }
+ *
+ * @endcode
+*/
+ 
+class HCSR04 {    
+    public:    
+        /** Constructor, create HCSR04 instance 
+          *
+          * @param trigger TRIG pin
+          * @param echo ECHO pin
+          */
+        HCSR04(PinName trigger, PinName echo);
+ 
+        /** It make a reading of the sonar Faz uma leitura do sonar
+          * 
+          * @returns Tempo do pulso echo em microsegundos*/
+        float readEcho(void);
+        
+        /** It messures the distance in centimeter "cm" 
+          *
+          *@returns Distance in centimeter
+          */
+        float getCm(void);
+        
+        /** Mede a distência em polegadas "in" 
+          *
+          *@returns Distência em in*/
+        float getIn(void);
+        
+    private:
+        float tdist;        //Leitura do tempo transcorrido
+        float distcm;       //Guarda o valor da distanciância em centímetros
+        float distin;       //Guarda o valor da distência em polegadas
+        
+        DigitalOut _t;      //Configuração do pino de Trigger  
+        DigitalIn _e;       //Configuração do pino de Echo
+        Timer _tempo;       //Cria um objeto timer
+        
+};
+ 
+#endif
\ No newline at end of file