MSP430 seven segment LED display CD4511

//  MSP430G2231  

// and display on 7 segment display via 4511 decoder/driver

#include  <msp430x20x2.h>

#include <io.h>

#include <signal.h>

#include <stdlib.h>

#include <stdio.h>

static void __inline__delay(register unsigned int n);

void main( void )

{

int msd, lsd, r1, r2, r3, r4, i, k = 0;

WDTCTL = WDTPW + WDTHOLD; 

P1DIR |= 0x3f; 

P1SEL = 0x00;

while( 1 )

  { 

i++;

r2 = i / 10;

r1 = i - r2 * 10;

msd = r2;

lsd = r1;    

P1OUT &= ~BIT4;

P1OUT = (BIT0 & msd) | (BIT1 & msd) | (BIT2 & msd) | (BIT3 & msd) | BIT5;

__inline__delay( 0xff );

P1OUT |= BIT4;

msd = 5;

P1OUT &= ~BIT5;

P1OUT = (BIT0 & lsd) | (BIT1 & lsd) | (BIT2 & lsd) | (BIT3 & lsd) | BIT4;

P1OUT |= BIT5;

__inline__delay(0xFF00);

}

}

// Delay Routine from mspgcc help file

static void __inline__delay(register unsigned int n)

{

  __asm__ __volatile__ (

  "1: \n"

  " dec %[n] \n"

  " jne 1b \n"

        : [n] "+r"(n));

}