Julien Kern / mbed

mbed library

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TARGET_RBLAB_NRF51822/TARGET_NORDIC/TARGET_MCU_NRF51822/Lib/nrf-sdk/nrf_delay.h@89:552587b429a1, 2014-09-12 (annotated)

Committer:
bogdanm
Date:
Fri Sep 12 16:41:52 2014 +0100
Revision:
89:552587b429a1
Release 89 of the mbed library



Main changes:



- low power optimizations for Nordic targets

- code structure changes for Freescale K64F targets

- bug fixes in various backends

Who changed what in which revision?

UserRevisionLine numberNew contents of line
bogdanm 89:552587b429a1 1 #ifndef _NRF_DELAY_H
bogdanm 89:552587b429a1 2 #define _NRF_DELAY_H
bogdanm 89:552587b429a1 3
bogdanm 89:552587b429a1 4 // #include "nrf.h"
bogdanm 89:552587b429a1 5
bogdanm 89:552587b429a1 6 /*lint --e{438, 522} "Variable not used" "Function lacks side-effects" */
bogdanm 89:552587b429a1 7 #if defined ( __CC_ARM )
bogdanm 89:552587b429a1 8 static __ASM void __INLINE nrf_delay_us(uint32_t volatile number_of_us)
bogdanm 89:552587b429a1 9 {
bogdanm 89:552587b429a1 10 loop
bogdanm 89:552587b429a1 11 SUBS R0, R0, #1
bogdanm 89:552587b429a1 12 NOP
bogdanm 89:552587b429a1 13 NOP
bogdanm 89:552587b429a1 14 NOP
bogdanm 89:552587b429a1 15 NOP
bogdanm 89:552587b429a1 16 NOP
bogdanm 89:552587b429a1 17 NOP
bogdanm 89:552587b429a1 18 NOP
bogdanm 89:552587b429a1 19 NOP
bogdanm 89:552587b429a1 20 NOP
bogdanm 89:552587b429a1 21 NOP
bogdanm 89:552587b429a1 22 NOP
bogdanm 89:552587b429a1 23 NOP
bogdanm 89:552587b429a1 24 BNE loop
bogdanm 89:552587b429a1 25 BX LR
bogdanm 89:552587b429a1 26 }
bogdanm 89:552587b429a1 27 #elif defined ( __ICCARM__ )
bogdanm 89:552587b429a1 28 static void __INLINE nrf_delay_us(uint32_t volatile number_of_us)
bogdanm 89:552587b429a1 29 {
bogdanm 89:552587b429a1 30 __ASM (
bogdanm 89:552587b429a1 31 "loop:\n\t"
bogdanm 89:552587b429a1 32 " SUBS R0, R0, #1\n\t"
bogdanm 89:552587b429a1 33 " NOP\n\t"
bogdanm 89:552587b429a1 34 " NOP\n\t"
bogdanm 89:552587b429a1 35 " NOP\n\t"
bogdanm 89:552587b429a1 36 " NOP\n\t"
bogdanm 89:552587b429a1 37 " NOP\n\t"
bogdanm 89:552587b429a1 38 " NOP\n\t"
bogdanm 89:552587b429a1 39 " NOP\n\t"
bogdanm 89:552587b429a1 40 " NOP\n\t"
bogdanm 89:552587b429a1 41 " NOP\n\t"
bogdanm 89:552587b429a1 42 " NOP\n\t"
bogdanm 89:552587b429a1 43 " NOP\n\t"
bogdanm 89:552587b429a1 44 " NOP\n\t"
bogdanm 89:552587b429a1 45 " BNE loop\n\t");
bogdanm 89:552587b429a1 46 }
bogdanm 89:552587b429a1 47 #elif defined ( __GNUC__ )
bogdanm 89:552587b429a1 48 static void __INLINE nrf_delay_us(uint32_t volatile number_of_us)
bogdanm 89:552587b429a1 49 {
bogdanm 89:552587b429a1 50 do
bogdanm 89:552587b429a1 51 {
bogdanm 89:552587b429a1 52 __ASM volatile (
bogdanm 89:552587b429a1 53 "NOP\n\t"
bogdanm 89:552587b429a1 54 "NOP\n\t"
bogdanm 89:552587b429a1 55 "NOP\n\t"
bogdanm 89:552587b429a1 56 "NOP\n\t"
bogdanm 89:552587b429a1 57 "NOP\n\t"
bogdanm 89:552587b429a1 58 "NOP\n\t"
bogdanm 89:552587b429a1 59 "NOP\n\t"
bogdanm 89:552587b429a1 60 "NOP\n\t"
bogdanm 89:552587b429a1 61 "NOP\n\t"
bogdanm 89:552587b429a1 62 "NOP\n\t"
bogdanm 89:552587b429a1 63 "NOP\n\t"
bogdanm 89:552587b429a1 64 "NOP\n\t"
bogdanm 89:552587b429a1 65 "NOP\n\t"
bogdanm 89:552587b429a1 66 "NOP\n\t"
bogdanm 89:552587b429a1 67 );
bogdanm 89:552587b429a1 68 } while (--number_of_us);
bogdanm 89:552587b429a1 69 }
bogdanm 89:552587b429a1 70 #endif
bogdanm 89:552587b429a1 71
bogdanm 89:552587b429a1 72 void nrf_delay_ms(uint32_t volatile number_of_ms);
bogdanm 89:552587b429a1 73
bogdanm 89:552587b429a1 74 #endif