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hal/nrf24lu1p/cpu.c

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00001 /* Copyright (c) 2009 Nordic Semiconductor. All Rights Reserved.
00002  *
00003  * The information contained herein is confidential property of Nordic 
00004  * Semiconductor ASA.Terms and conditions of usage are described in detail 
00005  * in NORDIC SEMICONDUCTOR STANDARD SOFTWARE LICENSE AGREEMENT. 
00006  *
00007  * Licensees are granted free, non-transferable use of the information. NO
00008  * WARRENTY of ANY KIND is provided. This heading must NOT be removed from
00009  * the file.
00010  *              
00011  * $LastChangedRevision: 133 $
00012  */
00013 
00018 #include "nrf24lu1p.h"
00019 #include "nordic_common.h"
00020 #include "cpu.h"
00021 
00022 void cpu_pwr_down(void)
00023 {
00024   PWRDWN = 1;
00025 }
00026 
00027 void cpu_set_clock_frequency(uint8_t cf)
00028 {
00029   uint8_t temp = CLKCTL;
00030 
00031   // Clock frequnecy is defined by bits 6-4 in CLKCTL
00032   temp &= ~(BIT_6 | BIT_5 | BIT_4);
00033   temp |= cf & (BIT_6 | BIT_5 | BIT_4);
00034   
00035   F0 = EA;
00036   EA = 0;
00037   CLKCTL = temp;
00038   EA = F0;
00039 }
00040 

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