delay.c

   1
   2 #include "common.h"
   3 #include "pn51x.h"
   4
   5 #ifdef PCD_TIMER_USE_PIT
   6 uint32_t pcd_tick = 0;
   7 static void PCD_TIMER_ISR(pointer p)
   8 {
   9     _pcd_clear_int(PCD_TIMER_INT);
  10     /* increase tick */
  11     pcd_tick ++;
  12    /* Enable PIT interrupt neeed due to errata on Kinetis PIT */
  13    _pcd_timer_unmask_int(PCD_TIMER_INT);
  14 }
  15
  16 static void pcd_timer_init(void)
  17 {
  18     if(_int_install_isr(PCD_TIMER_INT, PCD_TIMER_ISR, NULL) == NULL) {
  19         return;
  20     } /* Endif */
  21     _bsp_int_init(AUDIO_INT, 2, 0, TRUE);
  22 }
  23 #endif
  24
  25 void Delay1us(uint32_t delay)
  26 {
  27 #ifdef PCD_TIMER_USE_PIT
  28     uint32_t savedTime = PIT_CVAL(TIMER_FOR_PCD);
  29     uint32_t currentTime = savedTime;
  30     uint32_t endTime = savedTime + (delay * (PCD_TIMER_FREQUENCY / 1000000));
  31
  32     while (currentTime <= savedTime){
  33         savedTime = currentTime;
  34         currentTime = PIT_CVAL(TIMER_FOR_PCD);
  35     }
  36
  37     while ((currentTime > endTime) && (currentTime <= savedTime)) {
  38         savedTime = currentTime;
  39         currentTime = PIT_CVAL(TIMER_FOR_PCD);
  40     }
  41 #else
  42     unsigned long  ovfl;
  43     MQX_TICK_STRUCT cur_tick,last_tick;
  44     _time_get_elapsed_ticks_fast(&cur_tick);
  45
  46     do {
  47         _time_get_elapsed_ticks_fast(&last_tick);
  48     } while( _time_diff_milliseconds(&last_tick,&cur_tick,&ovfl) >= delay);
  49 #endif
  50
  51 }
  52
  53 void Delay256us(uint8_t delay)
  54 {
  55     volatile uint8_t i;
  56
  57     while (delay--) {
  58         Delay1us(200);
  59         for(i = 0; i < 134; i++);
  60     }
  61 }
  62
  63 void Delay256P2us(uint8_t delay)
  64 {
  65     uint8_t i;
  66
  67     for(i = 0; i < delay; i++) {
  68         Delay256us(0xFF);
  69         Delay256us(0x01);
  70     }
  71 }
  72
  73 void Delay256P3us(uint8_t delay)
  74 {
  75     uint8_t i;
  76
  77     for(i = 0; i < delay; i++)
  78     {
  79         Delay256P2us(0xFF);
  80         Delay256P2us(0x01);
  81     }
  82 }
  83
  84 void Delay1ms(uint32 delay)
  85 {
  86     OS_Time_delay(delay + 2);
  87 }
  88
  89 void Delay1s(uint8_t  delay)
  90 {
  91     uint8_t i;
  92     for(i = 0; i < delay; i++) {
  93         Delay1ms(1000);
  94     }
  95 }
  96
  97 void SetTimer100us(uint16_t timeOut)
  98 {
  99     set_pn51x_timer(timeOut);
 100 }
 101
 102