Nordic Semiconductor / nrf51-sdk

Nordic nrf51 sdk sources. Mirrored from https://github.com/ARMmbed/nrf51-sdk.

Dependents:   nRF51822 nRF51822

source/nordic_sdk/components/drivers_nrf/hal/nrf_delay.h@19:47192cb9def7, 2016-04-07 (annotated)

Committer:
vcoubard
Date:
Thu Apr 07 17:37:40 2016 +0100
Revision:
19:47192cb9def7
Parent:
10:233fefd8162b
Child:
20:a90c48eb1d30
Synchronized with git rev 9251259f

Author: Liyou Zhou

Copy over coresponding files from nordic-sdk 9.0.0

Who changed what in which revision?

UserRevisionLine numberNew contents of line
vcoubard 1:ebc0e0ef0a11 1 #ifndef _NRF_DELAY_H
vcoubard 1:ebc0e0ef0a11 2 #define _NRF_DELAY_H
vcoubard 1:ebc0e0ef0a11 3
vcoubard 1:ebc0e0ef0a11 4 #include "nrf.h"
vcoubard 1:ebc0e0ef0a11 5
vcoubard 1:ebc0e0ef0a11 6 /*lint --e{438, 522} "Variable not used" "Function lacks side-effects" */
vcoubard 1:ebc0e0ef0a11 7 #if defined ( __CC_ARM )
vcoubard 1:ebc0e0ef0a11 8 static __ASM void __INLINE nrf_delay_us(uint32_t volatile number_of_us)
vcoubard 1:ebc0e0ef0a11 9 {
vcoubard 1:ebc0e0ef0a11 10 loop
vcoubard 1:ebc0e0ef0a11 11 SUBS R0, R0, #1
vcoubard 1:ebc0e0ef0a11 12 NOP
vcoubard 1:ebc0e0ef0a11 13 NOP
vcoubard 1:ebc0e0ef0a11 14 NOP
vcoubard 1:ebc0e0ef0a11 15 NOP
vcoubard 1:ebc0e0ef0a11 16 NOP
vcoubard 1:ebc0e0ef0a11 17 NOP
vcoubard 1:ebc0e0ef0a11 18 NOP
vcoubard 1:ebc0e0ef0a11 19 NOP
vcoubard 1:ebc0e0ef0a11 20 NOP
vcoubard 1:ebc0e0ef0a11 21 NOP
vcoubard 1:ebc0e0ef0a11 22 NOP
vcoubard 1:ebc0e0ef0a11 23 NOP
vcoubard 1:ebc0e0ef0a11 24 BNE loop
vcoubard 1:ebc0e0ef0a11 25 BX LR
vcoubard 1:ebc0e0ef0a11 26 }
vcoubard 1:ebc0e0ef0a11 27 #elif defined ( __ICCARM__ )
vcoubard 1:ebc0e0ef0a11 28 static void __INLINE nrf_delay_us(uint32_t volatile number_of_us)
vcoubard 1:ebc0e0ef0a11 29 {
vcoubard 1:ebc0e0ef0a11 30 __ASM (
vcoubard 1:ebc0e0ef0a11 31 "loop:\n\t"
vcoubard 1:ebc0e0ef0a11 32 " SUBS R0, R0, #1\n\t"
vcoubard 1:ebc0e0ef0a11 33 " NOP\n\t"
vcoubard 1:ebc0e0ef0a11 34 " NOP\n\t"
vcoubard 1:ebc0e0ef0a11 35 " NOP\n\t"
vcoubard 1:ebc0e0ef0a11 36 " NOP\n\t"
vcoubard 1:ebc0e0ef0a11 37 " NOP\n\t"
vcoubard 1:ebc0e0ef0a11 38 " NOP\n\t"
vcoubard 1:ebc0e0ef0a11 39 " NOP\n\t"
vcoubard 1:ebc0e0ef0a11 40 " NOP\n\t"
vcoubard 1:ebc0e0ef0a11 41 " NOP\n\t"
vcoubard 1:ebc0e0ef0a11 42 " NOP\n\t"
vcoubard 1:ebc0e0ef0a11 43 " NOP\n\t"
vcoubard 1:ebc0e0ef0a11 44 " NOP\n\t"
vcoubard 1:ebc0e0ef0a11 45 " BNE loop\n\t");
vcoubard 1:ebc0e0ef0a11 46 }
vcoubard 1:ebc0e0ef0a11 47 #elif defined ( __GNUC__ )
vcoubard 1:ebc0e0ef0a11 48
vcoubard 1:ebc0e0ef0a11 49 static void __INLINE nrf_delay_us(uint32_t volatile number_of_us) __attribute__((always_inline));
vcoubard 1:ebc0e0ef0a11 50 static void __INLINE nrf_delay_us(uint32_t volatile number_of_us)
vcoubard 1:ebc0e0ef0a11 51 {
vcoubard 1:ebc0e0ef0a11 52 register uint32_t delay asm ("r0") = number_of_us;
vcoubard 1:ebc0e0ef0a11 53 __ASM volatile (
vcoubard 1:ebc0e0ef0a11 54 ".syntax unified\n"
vcoubard 1:ebc0e0ef0a11 55 "1:\n"
vcoubard 1:ebc0e0ef0a11 56 " SUBS %0, %0, #1\n"
vcoubard 1:ebc0e0ef0a11 57 " NOP\n"
vcoubard 1:ebc0e0ef0a11 58 " NOP\n"
vcoubard 1:ebc0e0ef0a11 59 " NOP\n"
vcoubard 1:ebc0e0ef0a11 60 " NOP\n"
vcoubard 1:ebc0e0ef0a11 61 " NOP\n"
vcoubard 1:ebc0e0ef0a11 62 " NOP\n"
vcoubard 1:ebc0e0ef0a11 63 " NOP\n"
vcoubard 1:ebc0e0ef0a11 64 " NOP\n"
vcoubard 1:ebc0e0ef0a11 65 " NOP\n"
vcoubard 1:ebc0e0ef0a11 66 " NOP\n"
vcoubard 1:ebc0e0ef0a11 67 " NOP\n"
vcoubard 1:ebc0e0ef0a11 68 " NOP\n"
vcoubard 1:ebc0e0ef0a11 69 " BNE 1b\n"
vcoubard 1:ebc0e0ef0a11 70 ".syntax divided\n"
vcoubard 1:ebc0e0ef0a11 71 : "+r" (delay));
vcoubard 1:ebc0e0ef0a11 72 }
vcoubard 1:ebc0e0ef0a11 73 #endif
vcoubard 1:ebc0e0ef0a11 74
vcoubard 1:ebc0e0ef0a11 75 void nrf_delay_ms(uint32_t volatile number_of_ms);
vcoubard 1:ebc0e0ef0a11 76
vcoubard 1:ebc0e0ef0a11 77 #endif