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hal/nrf24le1/hal_rng.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 <stdint.h>
00019 #include <stdbool.h>
00020 
00021 #include "nrf24le1.h"
00022 #include "nordic_common.h"
00023 #include "hal_rng.h"
00024 
00025 void hal_rng_power_up(bool pwr_up)
00026 {
00027   if(pwr_up)
00028   {
00029     RNGCTL = (RNGCTL | BIT_7);      // powerUp bit = 1, power up the RNG
00030   }
00031   else
00032   {
00033     RNGCTL = (RNGCTL & ~(BIT_7));   // powerUp bit = 0, turn off the RNG
00034   }
00035 }
00036 
00037 void hal_rng_bias_corr_enable(bool en)
00038 {
00039   if(en)
00040   {
00041     RNGCTL = (RNGCTL | BIT_6);      // correctorEn bit = 1, turn on corrector
00042   }
00043   else
00044   {
00045     RNGCTL = (RNGCTL & ~(BIT_6));   // correctorEn bit = 0, turn off corrector
00046   }
00047 }
00048 
00049 uint8_t hal_rng_read(void)
00050 {
00051   return RNGDAT;                    // Return data stored in RNGDAT register
00052 }
00053 
00054 bool hal_rng_data_ready(void)
00055 {
00056   return((RNGCTL & BIT_5) > 0);     // Return true if data ready bit is 1
00057 }

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