#define ALTAUTOSCALE 0x02 /* use alternative algorithm to find lower and upper bounds */
#define ALTAUTOSCALE_MAX 0x04 /* use alternative algorithm to find upper bounds */
#define NOLEGEND 0x08 /* use no legend */
+#define NOMINOR 0x20 /* Turn off minor gridlines */
enum tmt_en {TMT_SECOND=0,TMT_MINUTE,TMT_HOUR,TMT_DAY,