Scanf in CCS for MSP430

Rodney Wong said:

Can MSP430 support the function?

#include <msp430.h>
#include <stdio.h>

/*
 * main.c
 */
int main(void) {
	int number;

    WDTCTL = WDTPW | WDTHOLD;	// Stop watchdog timer

    while (1)
    {
    	printf ("Enter integer value>");
    	if (scanf ("%d", &number) == 1)
    	{
    		printf ("Value = %d\n", number);
    	}
    	else
  		{
    		printf ("Invalid integer entered\n");

    		/* @todo Flush standard input to stop scanf() continuously returning a failure
    		 *       after an invalid integer has been entered.
    		 */
        	fflush (stdin);
   		}
    }
	
	return 0;
}

The CCS debugger re-directs standard input and output through the CIO console.

Note that to get scanf and printf to work with MSP430 devices requires a Heap Size and Stack Size ot around 1024 bytes (exact size required not investigated but the program failed when smaller sizes were used).

See http://processors.wiki.ti.com/index.php/CIO_System_Call_Protocol for some background on how CIO is implemented by CCS.