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 * Copyright (c) 2016 - 2018, Nordic Semiconductor ASA
 * 
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 * are permitted provided that the following conditions are met:
 * 
 * 1. Redistributions of source code must retain the above copyright notice, this
 *    list of conditions and the following disclaimer.
 * 
 * 2. Redistributions in binary form, except as embedded into a Nordic
 *    Semiconductor ASA integrated circuit in a product or a software update for
 *    such product, must reproduce the above copyright notice, this list of
 *    conditions and the following disclaimer in the documentation and/or other
 *    materials provided with the distribution.
 * 
 * 3. Neither the name of Nordic Semiconductor ASA nor the names of its
 *    contributors may be used to endorse or promote products derived from this
 *    software without specific prior written permission.
 * 
 * 4. This software, with or without modification, must only be used with a
 *    Nordic Semiconductor ASA integrated circuit.
 * 
 * 5. Any software provided in binary form under this license must not be reverse
 *    engineered, decompiled, modified and/or disassembled.
 * 
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 */
/** @file
 * @defgroup qspi_example_main main.c
 * @{
 * @ingroup qspi_example
 *
 * @brief QSPI Example Application main file.
 *
 * This file contains the source code for a sample application using QSPI.
 */

#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include "nrf_drv_qspi.h"
#include "nrf_delay.h"
#include "app_util_platform.h"
#include "app_error.h"
#include "boards.h"

#include "nrf_log.h"
#include "nrf_log_ctrl.h"
#include "nrf_log_default_backends.h"
#include "sdk_config.h"

#define QSPI_STD_CMD_WRSR   0x01
#define QSPI_STD_CMD_RSTEN  0x66
#define QSPI_STD_CMD_RST    0x99

#define QSPI_TEST_DATA_SIZE 256

#define WAIT_FOR_PERIPH() do { \
        while (!m_finished) {} \
        m_finished = false;    \
    } while (0)

static volatile bool m_finished = false;
static uint8_t m_buffer_tx[QSPI_TEST_DATA_SIZE];
static uint8_t m_buffer_rx[QSPI_TEST_DATA_SIZE];

static void qspi_handler(nrf_drv_qspi_evt_t event, void * p_context)
{
    UNUSED_PARAMETER(event);
    UNUSED_PARAMETER(p_context);
    m_finished = true;
}

static void configure_memory()
{
    uint8_t temporary = 0x40;
    uint32_t err_code;
    nrf_qspi_cinstr_conf_t cinstr_cfg = {
        .opcode    = QSPI_STD_CMD_RSTEN,
        .length    = NRF_QSPI_CINSTR_LEN_1B,
        .io2_level = true,
        .io3_level = true,
        .wipwait   = true,
        .wren      = true
    };

    // Send reset enable
    err_code = nrf_drv_qspi_cinstr_xfer(&cinstr_cfg, NULL, NULL);
    APP_ERROR_CHECK(err_code);

    // Send reset command
    cinstr_cfg.opcode = QSPI_STD_CMD_RST;
    err_code = nrf_drv_qspi_cinstr_xfer(&cinstr_cfg, NULL, NULL);
    APP_ERROR_CHECK(err_code);

    // Switch to qspi mode
    cinstr_cfg.opcode = QSPI_STD_CMD_WRSR;
    cinstr_cfg.length = NRF_QSPI_CINSTR_LEN_2B;
    err_code = nrf_drv_qspi_cinstr_xfer(&cinstr_cfg, &temporary, NULL);
    APP_ERROR_CHECK(err_code);
}


int main(void)
{
    uint32_t i;
    uint32_t err_code;

    err_code = NRF_LOG_INIT(NULL);
    APP_ERROR_CHECK(err_code);

    NRF_LOG_DEFAULT_BACKENDS_INIT();

    NRF_LOG_INFO(""
                 "QSPI write and read example using 24bit addressing mode");

    srand(0);
    for (i = 0; i < QSPI_TEST_DATA_SIZE; ++i)
    {
        m_buffer_tx[i] = (uint8_t)rand();
    }

    nrf_drv_qspi_config_t config = NRF_DRV_QSPI_DEFAULT_CONFIG;

    err_code = nrf_drv_qspi_init(&config, qspi_handler, NULL);
    APP_ERROR_CHECK(err_code);
    NRF_LOG_INFO("QSPI example started.");

    configure_memory();

    m_finished = false;
    err_code = nrf_drv_qspi_erase(NRF_QSPI_ERASE_LEN_64KB, 0);
    APP_ERROR_CHECK(err_code);
    WAIT_FOR_PERIPH();
    NRF_LOG_INFO("Process of erasing first block start");

    err_code = nrf_drv_qspi_write(m_buffer_tx, QSPI_TEST_DATA_SIZE, 0);
    APP_ERROR_CHECK(err_code);
    WAIT_FOR_PERIPH();
    NRF_LOG_INFO("Process of writing data start");

    err_code = nrf_drv_qspi_read(m_buffer_rx, QSPI_TEST_DATA_SIZE, 0);
    WAIT_FOR_PERIPH();
    NRF_LOG_INFO("Data read");

    NRF_LOG_INFO("Compare...");
    if (memcmp(m_buffer_tx, m_buffer_rx, QSPI_TEST_DATA_SIZE) == 0)
    {
        NRF_LOG_INFO("Data consistent");
    }
    else
    {
        NRF_LOG_INFO("Data inconsistent");
    }

    nrf_drv_qspi_uninit();

    for (;;)
    {
    }
}

/** @} */