/* Copyright (c) 2012 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
* WARRANTY of ANY KIND is provided. This heading must NOT be removed from
* the file.
*
* $LastChangedRevision: 17685 $
*/

/**
 *@file
 *@brief NMVC driver implementation
 */

#include <stdbool.h>
#include "nrf.h"
#include "nrf_nvmc.h"


void nrf_nvmc_page_erase(uint32_t address)
{
    // Enable erase.
    NRF_NVMC->CONFIG = NVMC_CONFIG_WEN_Een;
    while (NRF_NVMC->READY == NVMC_READY_READY_Busy)
    {
    }

    // Erase the page
    NRF_NVMC->ERASEPAGE = address;
    while (NRF_NVMC->READY == NVMC_READY_READY_Busy)
    {
    }

    NRF_NVMC->CONFIG = NVMC_CONFIG_WEN_Ren;
    while (NRF_NVMC->READY == NVMC_READY_READY_Busy)
    {
    }
}


void nrf_nvmc_write_byte(uint32_t address, uint8_t value)
{
    uint32_t byte_shift = address & (uint32_t)0x03;
    uint32_t address32 = address & ~byte_shift; // Address to the word this byte is in.
    uint32_t value32 = (*(uint32_t*)address32 & ~((uint32_t)0xFF << (byte_shift << (uint32_t)3)));
    value32 = value32 + ((uint32_t)value << (byte_shift << 3));

    // Enable write.
    NRF_NVMC->CONFIG = (NVMC_CONFIG_WEN_Wen << NVMC_CONFIG_WEN_Pos);
    while (NRF_NVMC->READY == NVMC_READY_READY_Busy)
    {
    }

    *(uint32_t*)address32 = value32;
    while (NRF_NVMC->READY == NVMC_READY_READY_Busy)
    {
    }

    NRF_NVMC->CONFIG = (NVMC_CONFIG_WEN_Ren << NVMC_CONFIG_WEN_Pos);
    {
    }
}

void nrf_nvmc_write_word(uint32_t address, uint32_t value)
{
    // Enable write.
    NRF_NVMC->CONFIG = NVMC_CONFIG_WEN_Wen;
    while (NRF_NVMC->READY == NVMC_READY_READY_Busy){
    }

    *(uint32_t*)address = value;
    while (NRF_NVMC->READY == NVMC_READY_READY_Busy){
    }

    NRF_NVMC->CONFIG = NVMC_CONFIG_WEN_Ren;
    while (NRF_NVMC->READY == NVMC_READY_READY_Busy)
    {
    }
}

void nrf_nvmc_write_bytes(uint32_t address, const uint8_t * src, uint32_t num_bytes)
{
    uint32_t i;
    for (i=0;i<num_bytes;i++)
    {
       nrf_nvmc_write_byte(address + i,src[i]);
    }
}

void nrf_nvmc_write_words(uint32_t address, const uint32_t * src, uint32_t num_words)
{
    uint32_t i;

    // Enable write.
    NRF_NVMC->CONFIG = NVMC_CONFIG_WEN_Wen;
    while (NRF_NVMC->READY == NVMC_READY_READY_Busy)
    {
    }

    for (i=0;i<num_words;i++)
    {
        ((uint32_t*)address)[i] = src[i];
        while (NRF_NVMC->READY == NVMC_READY_READY_Busy)
        {
        }
    }

    NRF_NVMC->CONFIG = NVMC_CONFIG_WEN_Ren;
    while (NRF_NVMC->READY == NVMC_READY_READY_Busy)
    {
    }
}

