function dmx_set_dmx_receive_mode($change_only = SEND_ALWAYS) { global $debug, $dmx; $c = $change_only & 1; return dmx_write(CMD_RX_DMX_ON_CHANGE, 1, chr($c)); }
function dmx_set_levels($data) { global $debug, $dmx; if (strlen($data) > 512) { $data = substr($data, 0, 512); } $data = chr(0) . $data; $ds = strlen($data); return dmx_write(OUTPUT_ONLY_SEND_DMX, $ds, $data); }