tmk_core/tool/mbed/mbed-sdk/libraries/mbed/targets/cmsis/TARGET_NORDIC/TARGET_MCU_NRF51822/nrf_delay.h

   1 #ifndef _NRF_DELAY_H
   2 #define _NRF_DELAY_H
   3
   4 // #include "nrf.h"
   5
   6 /*lint --e{438, 522} "Variable not used" "Function lacks side-effects" */
   7 #if defined ( __CC_ARM   )
   8 static __ASM void __INLINE nrf_delay_us(uint32_t volatile number_of_us)
   9 {
  10 loop
  11         SUBS    R0, R0, #1
  12         NOP
  13         NOP
  14         NOP
  15         NOP
  16         NOP
  17         NOP
  18         NOP
  19         NOP
  20         NOP
  21         NOP
  22         NOP
  23         NOP
  24         BNE    loop
  25         BX     LR
  26 }
  27 #elif defined ( __ICCARM__ )
  28 static void __INLINE nrf_delay_us(uint32_t volatile number_of_us)
  29 {
  30 __ASM (
  31 "loop:\n\t"
  32        " SUBS R0, R0, #1\n\t"
  33        " NOP\n\t"
  34        " NOP\n\t"
  35        " NOP\n\t"
  36        " NOP\n\t"
  37        " NOP\n\t"
  38        " NOP\n\t"
  39        " NOP\n\t"
  40        " NOP\n\t"
  41        " NOP\n\t"
  42        " NOP\n\t"
  43        " NOP\n\t"
  44        " NOP\n\t"
  45        " BNE loop\n\t");
  46 }
  47 #elif defined   (  __GNUC__  )
  48 static void __INLINE nrf_delay_us(uint32_t volatile number_of_us)
  49 {
  50     do
  51     {
  52     __ASM volatile (
  53         "NOP\n\t"
  54         "NOP\n\t"
  55         "NOP\n\t"
  56         "NOP\n\t"
  57         "NOP\n\t"
  58         "NOP\n\t"
  59         "NOP\n\t"
  60         "NOP\n\t"
  61         "NOP\n\t"
  62         "NOP\n\t"
  63         "NOP\n\t"
  64         "NOP\n\t"
  65         "NOP\n\t"
  66         "NOP\n\t"
  67     );
  68     } while (--number_of_us);
  69 }
  70 #endif
  71
  72 void nrf_delay_ms(uint32_t volatile number_of_ms);
  73
  74 #endif