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diff --git a/main.c b/main.c
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+#include <msp430fr6989.h>
+
+
+char lec=0;
+int cont1=0,cont2=0,cont3=0,cont4=0;
+void main(void)
+{
+    WDTCTL = WDTPW | WDTHOLD;   // stop watchdog timer
+    PM5CTL0 = 0x0000;// DESACTIVAR EL MODO DE ALTA IMPEDANCIA
+
+    /*Confg. de perifericos */
+    P1SEL0 = 0x00;
+    P1SEL1 = 0x00; //SELECCIONAMOS FUNCION COMO I/O DIGITAL
+    P1DIR  = 0x01; //P1.0-> SALIDA P1.1-P1.7-> ENTRADAS
+    P1REN  = 0xFE;
+    P1OUT = 0xFE;
+    P1IE = 0x7E;
+    P1IES = 0x00;
+    P1IFG = 0x00;
+
+    P9SEL0 = 0x00;
+    P9SEL1 = 0x00; //SELECCIONAMOS FUNCION COMO I/O DIGITAL
+    P9DIR  = 0x80; //P9.7-> SALIDA P9.0-P9.6->ENTRADAS
+    P9REN  = 0x7f;
+    P9OUT = 0x00;
+
+    __enable_interrupt(); //también se puede usar _enable_interrupts()
+
+    for(;;)
+    {
+
+
+    }//loop
+}//main
+
+//**************Interruptions**************
+#if defined(__TI_COMPILER_VERSION__) || defined(__IAR_SYSTEMS_ICC__)
+#pragma vector=PORT1_VECTOR
+__interrupt void inter_puerto1(void)
+#elif defined(__GNUC__)
+void __attribute__ ((interrupt(PORT1_VECTOR))) PORT1_ISR (void)
+#else
+#error Compiler not supported!
+#endif
+{
+
+    lec=P1IFG;
+    lec &= BIT3;
+    __delay_cycles(250);
+    if( P1IFG == BIT3){
+        cont1++;
+        P1OUT ^= 0x01;
+    }
+   
+    lec &= BIT4;
+    __delay_cycles(250);
+    if( P1IFG == BIT4){
+        cont2++;
+        P9OUT ^= 0x80;
+    }
+
+    lec &= BIT5;
+    __delay_cycles(250);
+    if( P1IFG == BIT5){
+        cont3++;
+        P1OUT ^= 0x01;
+    }
+
+    lec &= BIT6;
+    __delay_cycles(250);
+    if( P1IFG == BIT6){
+        cont4++;
+        P9OUT ^= 0x80;
+    }
+
+    P1IFG=0x00;
+}
+