NXPCup_Cachan
/
Ultrason_SRF05
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Dependencies: mbed
Revision 0:b3c728b7daba, committed 2020-03-04
- Comitter:
- theoduval
- Date:
- Wed Mar 04 14:50:47 2020 +0000
- Commit message:
- Programme pour ultrason SRF05
Changed in this revision
| main.cpp | Show annotated file Show diff for this revision Revisions of this file |
| mbed.bld | Show annotated file Show diff for this revision Revisions of this file |
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp Wed Mar 04 14:50:47 2020 +0000
@@ -0,0 +1,79 @@
+#include "mbed.h"
+DigitalOut UltrasonTriger(p18);
+DigitalIn UltrasonEcho(p17);
+DigitalOut led1(LED1), led2(LED2), led3(LED3), led4(LED4);
+Serial pc(USBTX, USBRX,460800);
+Serial blueth(p9, p10,115200); // tx,rx,baudrate
+
+void Imp_Ultra(void);
+int Rec_Ultra();
+
+int main() {
+
+
+ while(1)
+ {
+ Imp_Ultra();
+ }
+}
+
+void Imp_Ultra(void)
+{
+ static Timer timer;
+ float ultrason_distance;
+ //blueth.printf("fonct\n");
+
+
+ static short etat = 0;
+
+ switch(etat)
+ {
+ case 0:
+ led1 = 1;
+ UltrasonTriger = 1; // envoie une impulsion de 10us
+ timer.start();
+ etat = 1;
+ break;
+ case 1:
+
+ if(timer.read_us() > 10) // fin de l'impulsion
+ {
+ led1 = 0;
+ UltrasonTriger = 0;
+ timer.reset();
+ etat = 2;
+ }
+ break;
+ case 2:
+
+ if(UltrasonEcho.read()==1) // Si on a une reception
+ {
+ timer.start(); // lance timer pour mersurer l'impulsion
+ etat = 3;
+ }
+ if(timer.read_ms()>30) etat = 4; // Si au bout de 30ms pas de reception alors aucune mesure
+ break;
+ case 3:
+
+ if(UltrasonEcho.read()==0) // Mesurer le temps d'impulsion de la reception
+ {
+ ultrason_distance=timer.read_us()/58-8; // Calcul de la distance
+ blueth.printf("La dustance est de %3.2f cm\n",ultrason_distance);
+ timer.stop();
+ timer.reset();
+ etat = 5;
+ }
+ if(timer.read_ms()>30) etat = 4;
+ break;
+ case 4:
+ blueth.printf("erreur"); // Si pas de recption
+ timer.stop();
+ timer.reset();
+ etat = 5;
+ break;
+ case 5:
+ break;
+
+
+ }
+}
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed.bld Wed Mar 04 14:50:47 2020 +0000 @@ -0,0 +1,1 @@ +https://os.mbed.com/users/mbed_official/code/mbed/builds/65be27845400 \ No newline at end of file