cpu.c

来自「非常全的nrf2401设计资料」· C语言 代码 · 共 43 行

/* Copyright (c) 2007 Nordic Semiconductor. All Rights Reserved.
 *
 * The information contained herein is property of Nordic Semiconductor ASA.
 * Terms and conditions of usage are described in detail in NORDIC
 * SEMICONDUCTOR STANDARD SOFTWARE LICENSE AGREEMENT. 
 *
 * Licensees are granted free, non-transferable use of the information. NO
 * WARRENTY of ANY KIND is provided. This heading must NOT be removed from
 * the file.
 *
 * $LastChangedRevision: 2290 $
 */ 

/** @file
 * Implementation of the CPU module for nRF24LU1.
 * @author Ole Saether
 */


#include <Nordic\reg24lu1.h>
#include "nordic_common.h"
#include "cpu.h"

void cpu_pwr_down(void)
{
  PWRDWN = 1;
}

void cpu_set_clock_frequency(uint8_t cf)
{
  uint8_t temp = CLKCTL;

  // Clock frequnecy is defined by bits 6-4 in CLKCTL
  temp &= ~(BIT_6 | BIT_5 | BIT_4);
  temp |= cf & (BIT_6 | BIT_5 | BIT_4);
  
  F0 = EA;
  EA = 0;
  CLKCTL = temp;
  EA = F0;
}