/* Generate NEC header value: active 9ms + negative 4.5ms.  */
static void fill_item_header(rmt_item32_t *item)
/* Generate NEC header value: active 9ms + negative 4.5ms.  */
static void fill_item_header(rmt_item32_t *item)
{
    fill_item_level(item, HEADER_HIGH_US, HEADER_LOW_US);
}