One User Task

We have already seen how to configure applications consisting of a single user task. It may be useful, however, to take a closer look at what happens when we do this. The example program we have chosen just converts a stream of characters read from stdin to upper case. Here is the C source file, upper.c, for the upper case program:

#include <stdio.h>

#include <ctype.h>

main() {

   int c;

   while ((c = getchar()) != EOF) {

      putchar(toupper(c));

   }

}

An appropriate configuration file, upper.cfg,  could be the following:

processor root  type=SMQ_DSP DEVICE=1

task      upper data=?

place     upper root

As we have seen, we could build and run an application from this source file (and a suitable configuration file) with commands similar to the following:

» 3L c upper.c

» 3L t upper

» 3L a upper

» 3L x upper

case changer

CASE CHANGER

…

The next section looks into the configuration file in more detail.