This will output config for each instance in a course:
<?phprequire_once( '../../config.php' );
require_once( $CFG->libdir.'/blocklib.php' );
global $CFG,$COURSE;
$coursecontext = context_course::instance($COURSE->id);
$blockrecords = $DB->get_records('block_instances', array('blockname' => 'newblock', 'parentcontextid' => $coursecontext->id));
foreach ($blockrecords as $b){
$blockinstance = block_instance('newblock', $b);
print_object($blockinstance->config);
}