improve read from broken rigol scopes

[rigol] / raw2gp.c

#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>

int main (int argc, char **argv)
{
	unsigned char buf[1024];
	int i, n;

	while ((n = read (0, buf, 1024)) > 0) {
		for (i=0;i<n;i++)
			printf ("%d\n", 255-buf[i]);
	}
	exit (0);
}