[ECOS] Problem with f-format

[Andrew Lunn]

On Wed, Aug 20, 2008 at 03:27:42PM +0200, Robert Brusa wrote:
> I am using ecos on a AT91SAM7X-EK-target. The routine shown below outputs 
> the three lines (to UART1):
>
> j:770 x:%f
> j:
> j:772 x:5.980000
>
> which is not what I would expect from the producing routine shown here:
>
> 	void fproblem( void)
> 	{	//simple procedure to demonstrate problem with f-format
> 		unsigned int j = 770;
> 		float x = 5.98;
> 		diag_printf("\nj:%u x:%f", j, x);

diag_printf does not implement float/double etc. It is supposed to be
a lean/mean printf you can use in interrupt handlers, and other debug
situations, not a full blown POSIX compatible printf. 

> 		j++;
> 		printf("\nj:%u x:%f", j, x);

You probably want to flush the stream. If i remember correctly, it
only gets flushed when you write a \n, which you don't have here.

> 		char str[15];
> 		j++;
> 		sprintf(str, "\nj:%u x:%f", j, x);
> 		diag_printf("%s", str);
> 	} // end fproblem

        Andrew

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