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124 lines
2.8 KiB
C
124 lines
2.8 KiB
C
/**
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* @file anim.c
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*
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*/
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/*********************
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* INCLUDES
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*********************/
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#include <string.h>
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#include "anim.h"
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#include "misc/os/ptask.h"
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#include "hal/systick/systick.h"
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/*********************
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* DEFINES
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*********************/
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#define ANIM_PATH_LENGTH 129 /*Elements in a path array*/
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#define ANIM_PATH_START 64 /*In path array a value which corresponds to the start position*/
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#define ANIM_PATH_END 192 /* ... to the end position. Not required, just for clearance.*/
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#define ANIM_PATH_NORM_SHIFT 7 /*ANIM_PATH_START - ANIM_PATH_END. Must be 2^N. The exponent goes here. */
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/**********************
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* TYPEDEFS
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**********************/
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/**********************
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* STATIC PROTOTYPES
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**********************/
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static void anim_task (void);
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/**********************
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* STATIC VARIABLES
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**********************/
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static ll_dsc_t anim_ll;
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static uint32_t last_task_run;
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/**********************
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* MACROS
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**********************/
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/**********************
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* GLOBAL FUNCTIONS
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**********************/
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/**
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* Init. the animation module
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*/
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void anim_init(void)
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{
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ll_init(&anim_ll, sizeof(anim_t));
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last_task_run = systick_get();
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ptask_create(anim_task, LV_REFR_PERIOD, PTASK_PRIO_MID);
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}
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/**
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* Create an animation
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* @param anim_p an initialized 'anim_t' variable. Not required after call.
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*/
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void anim_create(anim_t * anim_p)
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{
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anim_t * new_anim_dp = ll_ins_head(&anim_ll);
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dm_assert(new_anim_dp);
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memcpy(new_anim_dp, anim_p, sizeof(anim_t));
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new_anim_dp->fp(new_anim_dp->p, new_anim_dp->start);
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}
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/**********************
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* STATIC FUNCTIONS
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**********************/
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/**
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* Periodically handle animations.
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*/
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static void anim_task (void)
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{
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uint32_t elaps;
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elaps = systick_elaps(last_task_run);
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anim_t * a;
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anim_t * a_next;
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a = ll_get_head(&anim_ll);
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while(a != NULL) {
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/*'a' might be deleted, so get the next object while 'a' is valid*/
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a_next = ll_get_next(&anim_ll, a);
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a->act_time += elaps;
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if(a->act_time >= 0) {
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if(a->act_time > a->time) a->act_time = a->time;
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/* Get the index of the path array based on the elapsed time*/
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uint8_t path_i;
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path_i = a->act_time * (ANIM_PATH_LENGTH - 1) / a->time;
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/* Get the new value which will be proportional to the current element of 'path_p'
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* and the 'start' and 'end' values*/
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int32_t new_val;
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new_val = (int32_t)(a->path_p[path_i] - ANIM_PATH_START) * (a->end - a->start);
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new_val = new_val >> ANIM_PATH_NORM_SHIFT;
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new_val += a->start;
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a->fp(a->p, new_val); /*Apply the calculated value*/
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/*Delete the animation if it is ready*/
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if(a->act_time >= a->time) {
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void (*cb) (void *) = a->end_cb;
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void * p = a->p;
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ll_rem(&anim_ll, a);
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dm_free(a);
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/*Call the callback function at the end*/
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if(cb != NULL) cb(p);
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}
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}
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a = a_next;
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}
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last_task_run = systick_get();
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}
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