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The official Mbed 2 C/C++ SDK provides the software platform and libraries to build your applications.

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mbed 2

This is the mbed 2 library. If you'd like to learn about Mbed OS please see the mbed-os docs.

TARGET_SEEED_TINY_BLE/TARGET_NORDIC/TARGET_MCU_NRF51822/device/nrf_delay.h@157:e7ca05fa8600, 2017-11-09 (annotated)

Committer:
AnnaBridge
Date:
Thu Nov 09 11:14:10 2017 +0000
Revision:
157:e7ca05fa8600
Parent:
128:9bcdf88f62b0 
Release 155 of the mbed library.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
<> 128:9bcdf88f62b0 1 #ifndef _NRF_DELAY_H
<> 128:9bcdf88f62b0 2 #define _NRF_DELAY_H
<> 128:9bcdf88f62b0 3
<> 128:9bcdf88f62b0 4 // #include "nrf.h"
<> 128:9bcdf88f62b0 5
<> 128:9bcdf88f62b0 6 /*lint --e{438, 522} "Variable not used" "Function lacks side-effects" */
<> 128:9bcdf88f62b0 7 #if defined ( __CC_ARM )
<> 128:9bcdf88f62b0 8 static __ASM void __INLINE nrf_delay_us(uint32_t volatile number_of_us)
<> 128:9bcdf88f62b0 9 {
<> 128:9bcdf88f62b0 10 loop
<> 128:9bcdf88f62b0 11 SUBS R0, R0, #1
<> 128:9bcdf88f62b0 12 NOP
<> 128:9bcdf88f62b0 13 NOP
<> 128:9bcdf88f62b0 14 NOP
<> 128:9bcdf88f62b0 15 NOP
<> 128:9bcdf88f62b0 16 NOP
<> 128:9bcdf88f62b0 17 NOP
<> 128:9bcdf88f62b0 18 NOP
<> 128:9bcdf88f62b0 19 NOP
<> 128:9bcdf88f62b0 20 NOP
<> 128:9bcdf88f62b0 21 NOP
<> 128:9bcdf88f62b0 22 NOP
<> 128:9bcdf88f62b0 23 NOP
<> 128:9bcdf88f62b0 24 BNE loop
<> 128:9bcdf88f62b0 25 BX LR
<> 128:9bcdf88f62b0 26 }
<> 128:9bcdf88f62b0 27 #elif defined ( __ICCARM__ )
<> 128:9bcdf88f62b0 28 static void __INLINE nrf_delay_us(uint32_t volatile number_of_us)
<> 128:9bcdf88f62b0 29 {
<> 128:9bcdf88f62b0 30 __ASM (
<> 128:9bcdf88f62b0 31 "loop:\n\t"
<> 128:9bcdf88f62b0 32 " SUBS R0, R0, #1\n\t"
<> 128:9bcdf88f62b0 33 " NOP\n\t"
<> 128:9bcdf88f62b0 34 " NOP\n\t"
<> 128:9bcdf88f62b0 35 " NOP\n\t"
<> 128:9bcdf88f62b0 36 " NOP\n\t"
<> 128:9bcdf88f62b0 37 " NOP\n\t"
<> 128:9bcdf88f62b0 38 " NOP\n\t"
<> 128:9bcdf88f62b0 39 " NOP\n\t"
<> 128:9bcdf88f62b0 40 " NOP\n\t"
<> 128:9bcdf88f62b0 41 " NOP\n\t"
<> 128:9bcdf88f62b0 42 " NOP\n\t"
<> 128:9bcdf88f62b0 43 " NOP\n\t"
<> 128:9bcdf88f62b0 44 " NOP\n\t"
<> 128:9bcdf88f62b0 45 " BNE loop\n\t");
<> 128:9bcdf88f62b0 46 }
<> 128:9bcdf88f62b0 47 #elif defined ( __GNUC__ )
<> 128:9bcdf88f62b0 48 static __INLINE void nrf_delay_us(uint32_t volatile number_of_us)
<> 128:9bcdf88f62b0 49 {
<> 128:9bcdf88f62b0 50 do
<> 128:9bcdf88f62b0 51 {
<> 128:9bcdf88f62b0 52 __ASM volatile (
<> 128:9bcdf88f62b0 53 "NOP\n\t"
<> 128:9bcdf88f62b0 54 "NOP\n\t"
<> 128:9bcdf88f62b0 55 "NOP\n\t"
<> 128:9bcdf88f62b0 56 "NOP\n\t"
<> 128:9bcdf88f62b0 57 "NOP\n\t"
<> 128:9bcdf88f62b0 58 "NOP\n\t"
<> 128:9bcdf88f62b0 59 "NOP\n\t"
<> 128:9bcdf88f62b0 60 "NOP\n\t"
<> 128:9bcdf88f62b0 61 "NOP\n\t"
<> 128:9bcdf88f62b0 62 "NOP\n\t"
<> 128:9bcdf88f62b0 63 "NOP\n\t"
<> 128:9bcdf88f62b0 64 "NOP\n\t"
<> 128:9bcdf88f62b0 65 "NOP\n\t"
<> 128:9bcdf88f62b0 66 "NOP\n\t"
<> 128:9bcdf88f62b0 67 );
<> 128:9bcdf88f62b0 68 } while (--number_of_us);
<> 128:9bcdf88f62b0 69 }
<> 128:9bcdf88f62b0 70 #endif
<> 128:9bcdf88f62b0 71
<> 128:9bcdf88f62b0 72 void nrf_delay_ms(uint32_t volatile number_of_ms);
<> 128:9bcdf88f62b0 73
<> 128:9bcdf88f62b0 74 #endif