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Last commit 20 Feb 2019 by mbed official

targets/cmsis/TARGET_NORDIC/TARGET_MCU_NRF51822/nrf_delay.h

Committer:
mbed_official
Date:
2015-07-06
Revision:
583:967d0d8b7aed
Parent:
570:e6ed7264c56c

File content as of revision 583:967d0d8b7aed:

#ifndef _NRF_DELAY_H
#define _NRF_DELAY_H

// #include "nrf.h"

/*lint --e{438, 522} "Variable not used" "Function lacks side-effects" */
#if defined ( __CC_ARM   )
static __ASM void __INLINE nrf_delay_us(uint32_t volatile number_of_us)
{
loop
        SUBS    R0, R0, #1
        NOP
        NOP
        NOP
        NOP
        NOP
        NOP
        NOP
        NOP
        NOP
        NOP
        NOP
        NOP
        BNE    loop
        BX     LR
}
#elif defined ( __ICCARM__ )
static void __INLINE nrf_delay_us(uint32_t volatile number_of_us)
{
__ASM (
"loop:\n\t"
       " SUBS R0, R0, #1\n\t"
       " NOP\n\t"
       " NOP\n\t"
       " NOP\n\t"
       " NOP\n\t"
       " NOP\n\t"
       " NOP\n\t"
       " NOP\n\t"
       " NOP\n\t"
       " NOP\n\t"
       " NOP\n\t"
       " NOP\n\t"
       " NOP\n\t"
       " BNE loop\n\t");
}
#elif defined   (  __GNUC__  )
__INLINE static void nrf_delay_us(uint32_t volatile number_of_us)
{
    do 
    {
    __ASM volatile (
        "NOP\n\t"
        "NOP\n\t"
        "NOP\n\t"
        "NOP\n\t"
        "NOP\n\t"
        "NOP\n\t"
        "NOP\n\t"
        "NOP\n\t"
        "NOP\n\t"
        "NOP\n\t"
        "NOP\n\t"
        "NOP\n\t"
        "NOP\n\t"
        "NOP\n\t"
    );
    } while (--number_of_us);
}
#endif

void nrf_delay_ms(uint32_t volatile number_of_ms);

#endif