nrf_nvmc.c

00001 /* Copyright (c) 2012 Nordic Semiconductor. All Rights Reserved.
00002 *
00003 * The information contained herein is property of Nordic Semiconductor ASA.
00004 * Terms and conditions of usage are described in detail in NORDIC
00005 * SEMICONDUCTOR STANDARD SOFTWARE LICENSE AGREEMENT. 
00006 *
00007 * Licensees are granted free, non-transferable use of the information. NO
00008 * WARRANTY of ANY KIND is provided. This heading must NOT be removed from
00009 * the file.
00010 *
00011 * $LastChangedRevision: 17685 $
00012 */ 
00013 
00014 /** 
00015  *@file
00016  *@brief NMVC driver implementation 
00017  */
00018 
00019 #include "stdbool.h"
00020 #include "nrf.h"
00021 #include "nrf_nvmc.h"
00022 
00023 
00024 void nrf_nvmc_page_erase(uint32_t address)
00025 { 
00026   // Enable erase.
00027   NRF_NVMC->CONFIG = NVMC_CONFIG_WEN_Een;
00028   while (NRF_NVMC->READY == NVMC_READY_READY_Busy)
00029   {
00030   }
00031 
00032   // Erase the page
00033   NRF_NVMC->ERASEPAGE = address;
00034   while (NRF_NVMC->READY == NVMC_READY_READY_Busy)
00035   {
00036   }
00037   
00038   NRF_NVMC->CONFIG = NVMC_CONFIG_WEN_Ren;
00039   while (NRF_NVMC->READY == NVMC_READY_READY_Busy)
00040   {
00041   }
00042 }
00043 
00044 
00045 void nrf_nvmc_write_byte(uint32_t address, uint8_t value)
00046 {
00047   uint32_t byte_shift = address & (uint32_t)0x03;
00048   uint32_t address32 = address & ~byte_shift; // Address to the word this byte is in.
00049   uint32_t value32 = (*(uint32_t*)address32 & ~((uint32_t)0xFF << (byte_shift << (uint32_t)3)));
00050   value32 = value32 + ((uint32_t)value << (byte_shift << 3));
00051 
00052   // Enable write.
00053   NRF_NVMC->CONFIG = (NVMC_CONFIG_WEN_Wen << NVMC_CONFIG_WEN_Pos);
00054   while (NRF_NVMC->READY == NVMC_READY_READY_Busy)
00055   {
00056   }
00057 
00058   *(uint32_t*)address32 = value32;
00059   while(NRF_NVMC->READY == NVMC_READY_READY_Busy)
00060   {
00061   }
00062 
00063   NRF_NVMC->CONFIG = (NVMC_CONFIG_WEN_Ren << NVMC_CONFIG_WEN_Pos);
00064   {
00065   }
00066 }
00067 
00068 void nrf_nvmc_write_word(uint32_t address, uint32_t value)
00069 {
00070   // Enable write.
00071   NRF_NVMC->CONFIG = NVMC_CONFIG_WEN_Wen;
00072   while (NRF_NVMC->READY == NVMC_READY_READY_Busy){
00073   }
00074 
00075   *(uint32_t*)address = value;
00076   while (NRF_NVMC->READY == NVMC_READY_READY_Busy){
00077   }
00078 
00079   NRF_NVMC->CONFIG = NVMC_CONFIG_WEN_Ren;
00080   while (NRF_NVMC->READY == NVMC_READY_READY_Busy)
00081   {
00082   }
00083 }
00084 
00085 void nrf_nvmc_write_bytes(uint32_t address, const uint8_t * src, uint32_t num_bytes)
00086 {
00087   uint32_t i;
00088   for(i=0;i<num_bytes;i++)
00089   {
00090      nrf_nvmc_write_byte(address+i,src[i]);
00091   }
00092 }
00093 
00094 void nrf_nvmc_write_words(uint32_t address, const uint32_t * src, uint32_t num_words)
00095 {
00096   uint32_t i;
00097 
00098   // Enable write.
00099   NRF_NVMC->CONFIG = NVMC_CONFIG_WEN_Wen;
00100   while (NRF_NVMC->READY == NVMC_READY_READY_Busy)
00101   {
00102   }
00103 
00104   for(i=0;i<num_words;i++)
00105   {
00106     ((uint32_t*)address)[i] = src[i];
00107     while (NRF_NVMC->READY == NVMC_READY_READY_Busy)
00108     {
00109     }
00110   }
00111 
00112   NRF_NVMC->CONFIG = NVMC_CONFIG_WEN_Ren;
00113   while (NRF_NVMC->READY == NVMC_READY_READY_Busy)
00114   {
00115   }
00116 }
00117