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February 24, 2015 09:51
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legge stringa e lampeggia led di conseguenza
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/* | |
Alessandro Spallina | |
[email protected] | |
http://aleksnote.altervista.org | |
Lorenzo Siena | |
[email protected] | |
* * * * * * * * * * * * * * * * * * * * * * * * * * * * | |
Legge una stringa e accende il led 3 se 'a', il led 13 se 'b', resta spento | |
in caso contrario. Quando arriva a fine stringa i led 3 e 13 rimangono accesi. | |
*/ | |
#include <stdio.h> | |
int led=3; | |
int controllo=13; | |
int posizione=0; | |
char stringa[]="abababzzzzzzhdhdhuabbbba"; | |
//******************************************* | |
int leggi() | |
{ | |
switch(stringa[posizione]) | |
{ | |
case 'a': | |
posizione++; | |
return 1; | |
case 'b': | |
posizione++; | |
return 2; | |
case '\0': | |
return 999; | |
default: | |
posizione++; | |
return -1; | |
} | |
} | |
//----------------------------------------- | |
void lampeggia(int who) | |
{ | |
switch(who) | |
{ | |
case 3: | |
digitalWrite(led, HIGH); | |
delay(500); | |
digitalWrite(led, LOW); | |
delay(500); | |
break; | |
case 13: | |
digitalWrite(controllo, HIGH); | |
delay(500); | |
digitalWrite(controllo, LOW); | |
delay(500); | |
break; | |
case 999: | |
digitalWrite(led, HIGH); | |
digitalWrite(controllo, HIGH); | |
break; | |
} | |
} | |
//******************************************* | |
void setup() | |
{ | |
pinMode(led, OUTPUT); | |
pinMode(controllo, OUTPUT); | |
} | |
void loop() | |
{ | |
switch(leggi()) | |
{ | |
case 1: //legge 'a' | |
lampeggia(led); | |
break; | |
case 2: //legge 'b' | |
lampeggia(controllo); | |
break; | |
case 999: | |
lampeggia(999); | |
break; | |
default: | |
delay(1000); | |
break; | |
} | |
} |
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