/**
* Called periodically to handle the input devices
* @param param unused
*/
static void indev_proc_task(void * param)
{
(void)param;
LV_LOG_TRACE("indev task started");
lv_indev_data_t data;
lv_indev_t * i;
i = lv_indev_next(NULL);
/*Read and process all indevs*/
while(i) {
indev_act = i;
/*Handle reset query before processing the point*/
indev_proc_reset_query_handler(i);
if(i->proc.disabled == 0) {
bool more_to_read;
do {
/*Read the data*/
more_to_read = lv_indev_read(i, &data);
indev_proc_reset_query_handler(i); /*The active object might deleted even in the read function*/
i->proc.state = data.state;
if(i->proc.state == LV_INDEV_STATE_PR) {
i->last_activity_time = lv_tick_get();
}
if(i->driver.type == LV_INDEV_TYPE_POINTER) {
indev_pointer_proc(i, &data);
} else if(i->driver.type == LV_INDEV_TYPE_KEYPAD) {
indev_keypad_proc(i, &data);
} else if(i->driver.type == LV_INDEV_TYPE_ENCODER) {
indev_encoder_proc(i, &data);
} else if(i->driver.type == LV_INDEV_TYPE_BUTTON) {
indev_button_proc(i, &data);
}
/*Handle reset query if it happened in during processing*/
indev_proc_reset_query_handler(i);
} while(more_to_read);
}
i = lv_indev_next(i); /*Go to the next indev*/
}
indev_act = NULL; /*End of indev processing, so no act indev*/
LV_LOG_TRACE("indev task finished");
}
/**
* Get the elapsed milliseconds science a previous time stamp
* @param prev_tick a previous time stamp (return value of systick_get() )
* @return the elapsed milliseconds since 'prev_tick'
*/
uint32_t lv_tick_elaps(uint32_t prev_tick)
{
uint32_t act_time = lv_tick_get();
/*If there is no overflow in sys_time simple subtract*/
if(act_time >= prev_tick) {
prev_tick = act_time - prev_tick;
} else {
prev_tick = UINT32_MAX - prev_tick + 1;
prev_tick += act_time;
}
return prev_tick;
}
/**
* Create a new lv_task
* @param task a function which is the task itself
* @param period call period in ms unit
* @param prio priority of the task (LV_TASK_PRIO_OFF means the task is stopped)
* @param param free parameter
* @return pointer to the new task
*/
lv_task_t* lv_task_create(void (*task) (void *), uint32_t period, lv_task_prio_t prio, void * param)
{
lv_task_t* new_lv_task;
new_lv_task = lv_ll_ins_head(&lv_task_ll);
lv_mem_assert(new_lv_task);
new_lv_task->period = period;
new_lv_task->task = task;
new_lv_task->prio = prio;
new_lv_task->param = param;
new_lv_task->once = 0;
new_lv_task->last_run = lv_tick_get();
return new_lv_task;
}
/**
* Execute task if its the priority is appropriate
* @param lv_task_p pointer to lv_task
* @param prio_act the current priority
* @return true: execute, false: not executed
*/
static bool lv_task_exec (lv_task_t* lv_task_p, lv_task_prio_t prio_act)
{
bool exec = false;
/*Execute lv_task if its prio is 'prio_act'*/
if(lv_task_p->prio == prio_act) {
/*Execute if at least 'period' time elapsed*/
uint32_t elp = lv_tick_elaps(lv_task_p->last_run);
if(elp >= lv_task_p->period) {
lv_task_p->last_run = lv_tick_get();
lv_task_p->task(lv_task_p->param);
/*Delete if it was a one shot lv_task*/
if(lv_task_p->once != 0) lv_task_del(lv_task_p);
exec = true;
}
}
return exec;
}
/**
* Call it periodically to handle lv_tasks.
*/
inline void LV_ATTRIBUTE_TASK_HANDLER lv_task_handler(void)
{
static uint32_t idle_period_start = 0;
static uint32_t handler_start = 0;
static uint32_t busy_time = 0;
if(lv_task_run == false) return;
handler_start = lv_tick_get();
lv_task_t* lv_task_prio_a[LV_TASK_PRIO_NUM]; /*Lists for all prio.*/
lv_task_prio_t prio_act;
bool prio_reset = false; /*Used to go back to the highest priority*/
lv_task_t* lv_task_next;
/*Init. the lists*/
for(prio_act = LV_TASK_PRIO_LOWEST; prio_act <= LV_TASK_PRIO_HIGHEST; prio_act++) {
lv_task_prio_a[prio_act] = lv_ll_get_head(&lv_task_ll);
}
/*Handle the lv_tasks on all priority*/
for(prio_act = LV_TASK_PRIO_HIGHEST; prio_act > LV_TASK_PRIO_OFF; prio_act --) {
/*Reset the prio. if necessary*/
if(prio_reset != false) {
prio_reset = false;
prio_act = LV_TASK_PRIO_HIGHEST; /*Go again with highest prio */
}
/* Read all lv_task on 'prio_act' but stop on 'prio_reset' */
while(lv_task_prio_a[prio_act] != NULL && prio_reset == false) {
/* Get the next task. (Invalid pointer if a lv_task deletes itself)*/
lv_task_next = lv_ll_get_next(&lv_task_ll, lv_task_prio_a[prio_act]);
/*Execute the current lv_task*/
bool executed = lv_task_exec(lv_task_prio_a[prio_act], prio_act);
if(executed != false) { /*If the task is executed*/
/* During the execution higher priority lv_tasks
* can be ready, so reset the priority if it is not highest*/
if(prio_act != LV_TASK_PRIO_HIGHEST) {
prio_reset = true;
}
}
lv_task_prio_a[prio_act] = lv_task_next; /*Load the next task*/
}
/*Reset higher priority lists on 'prio_reset' query*/
if(prio_reset != false) {
for(prio_act = prio_act + 1; prio_act <= LV_TASK_PRIO_HIGHEST; prio_act++) {
lv_task_prio_a[prio_act] = lv_ll_get_head(&lv_task_ll);
}
}
}
busy_time += lv_tick_elaps(handler_start);
uint32_t idle_period_time = lv_tick_elaps(idle_period_start);
if(idle_period_time >= IDLE_MEAS_PERIOD) {
idle_last = (uint32_t)((uint32_t)busy_time * 100) / IDLE_MEAS_PERIOD; /*Calculate the busy percentage*/
idle_last = idle_last > 100 ? 0 : 100 - idle_last; /*But we need idle time*/
busy_time = 0;
idle_period_start = lv_tick_get();
}
}
/**
* Reset a lv_task.
* It will be called the previously set period milliseconds later.
* @param lv_task_p pointer to a lv_task.
*/
void lv_task_reset(lv_task_t* lv_task_p)
{
lv_task_p->last_run = lv_tick_get();
}
/**
* Make a lv_task ready. It will not wait its period.
* @param lv_task_p pointer to a lv_task.
*/
void lv_task_ready(lv_task_t* lv_task_p)
{
lv_task_p->last_run = lv_tick_get() - lv_task_p->period - 1;
}
/**
* Reset the long press state of an input device
* @param indev pointer to an input device
*/
void lv_indev_reset_lpr(lv_indev_t * indev)
{
indev->proc.long_pr_sent = 0;
indev->proc.longpr_rep_timestamp = lv_tick_get();
indev->proc.pr_timestamp = lv_tick_get();
}
/**
* Init. the animation module
*/
void lv_anim_init(void)
{
lv_ll_init(&LV_GC_ROOT(_lv_anim_ll), sizeof(lv_anim_t));
last_task_run = lv_tick_get();
lv_task_create(anim_task, LV_REFR_PERIOD, LV_TASK_PRIO_MID, NULL);
}
