extern const struct tdma_sched_item tch_sched_set[];
extern const struct tdma_sched_item tch_a_sched_set[];
extern const struct tdma_sched_item tch_d_sched_set[];
extern const struct tdma_sched_item tch_sched_set[];
extern const struct tdma_sched_item tch_a_sched_set[];
extern const struct tdma_sched_item tch_d_sched_set[];