[参考译文] LP-CC2652RB：无法读取然后写入 NVS

您好！

您正处于该问题的正确论坛中！

基本上、您希望在以下方面实现什么、对吧？

_ NVS_READ ()
_修改从闪存中读取的任何值

_ NVS_write()您修改的值

您在 NVS_READ 和 WRITE 调用中使用了哪些参数？

此致、

Arthur

此外、您尝试读取/写入多少数据？

我已尝试以下代码、但未能重现问题。

/*
 * Copyright (c) 2017-2020, Texas Instruments Incorporated
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * *  Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * *  Redistributions in binary form 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.
 *
 * *  Neither the name of Texas Instruments Incorporated nor the names of
 *    its contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
/*
 *  ======== nvsinternal.c ========
 */

#include <string.h>
#include <stdlib.h>
#include <stdint.h>

/* Driver Header files */
#include <ti/display/Display.h>
#include <ti/drivers/NVS.h>

/* Driver configuration */
#include "ti_drivers_config.h"

#define FOOTER "=================================================="

/* Buffer placed in RAM to hold bytes read from non-volatile storage. */
static char buffer[64];

/*
 * Some devices have a minimum FLASH write size of 4-bytes (1 word). Trying
 * to write a non-multiple of 4 amount of data will fail. This array is
 * rounded up (to next multiple of 4) to meet this requirement. Refer to NVS
 * driver documentation for more details.
 */
static const char signature[52] =
    {"SimpleLink SDK Non-Volatile Storage (NVS) Example."};

/*
 *  ======== mainThread ========
 */
void *mainThread(void *arg0)
{
    NVS_Handle nvsHandle;
    NVS_Attrs regionAttrs;
    NVS_Params nvsParams;
    int_fast16_t nvsStatus;

    Display_Handle displayHandle;

    Display_init();
    NVS_init();

    displayHandle = Display_open(Display_Type_UART, NULL);
    if (displayHandle == NULL) {
        /* Display_open() failed */
        while (1);
    }

    NVS_Params_init(&nvsParams);
    nvsHandle = NVS_open(CONFIG_NVSINTERNAL, &nvsParams);

    if (nvsHandle == NULL) {
        Display_printf(displayHandle, 0, 0, "NVS_open() failed.");

        return (NULL);
    }

    Display_printf(displayHandle, 0, 0, "\n");

    /*
     * This will populate a NVS_Attrs structure with properties specific
     * to a NVS_Handle such as region base address, region size,
     * and sector size.
     */
    NVS_getAttrs(nvsHandle, &regionAttrs);

    /* Display the NVS region attributes */
    Display_printf(displayHandle, 0, 0, "Region Base Address: 0x%x",
            regionAttrs.regionBase);
    Display_printf(displayHandle, 0, 0, "Sector Size: 0x%x",
            regionAttrs.sectorSize);
    Display_printf(displayHandle, 0, 0, "Region Size: 0x%x\n",
            regionAttrs.regionSize);


    /*
     * Copy "sizeof(signature)" bytes from the NVS region base address into
     * buffer. An offset of 0 specifies the offset from region base address.
     * Therefore, the bytes are copied from regionAttrs.regionBase.
     */
    Display_printf(displayHandle, 0, 0, "Reading buffer");
    nvsStatus = NVS_read(nvsHandle, 0, (void *) buffer, sizeof(buffer));
    Display_printf(displayHandle, 0, 0, "read status: %d", nvsStatus);

    /* Modifying the buffer in order to replicate the issue */
    Display_printf(displayHandle, 0, 0, "Modifying buffer");
    buffer[13] = 'Z';
    buffer[0] = 'i';

    Display_printf(displayHandle, 0, 0, "Writing buffer");

    /* Write back the modified value to the flash */
    nvsStatus = NVS_write(nvsHandle, 0, (void *) signature, sizeof(signature),
                NVS_WRITE_ERASE | NVS_WRITE_POST_VERIFY);

    Display_printf(displayHandle, 0, 0, "write status: %d", nvsStatus);


    NVS_close(nvsHandle);

    Display_printf(displayHandle, 0, 0, "Reset the device.");
    Display_printf(displayHandle, 0, 0, FOOTER);

    return (NULL);
}

您能告诉我我有什么不同的做法、或者以上代码是否对您有效？

此致、

Arthur

是的、这就是我要实现的目标。 这是初始化代码。

        NVS_init();
        NVS_Params_init(&nvsParams);
        nvsHandle = NVS_open(CONFIG_NVSINTERNAL, &nvsParams);
        if(!nvsHandle)
        {
            DBG_log(LOG_ERROR, "Failed to initialize device info NVS");
            return false;
        }

        NVS_getAttrs(nvsHandle, &regionAttrs);

读取调用、其中`Current`是 INFO_DeviceInfo：

int16_t read = NVS_read(nvsHandle, 0, (void*)&current, sizeof(INFO_DeviceInfo));

以及写入调用、整个函数：

static bool save(const INFO_DeviceInfo * info)
{
    NVS_unlock(nvsHandle);

    int16_t result = NVS_write(nvsHandle, 0, (void*)info, sizeof(INFO_DeviceInfo), 0);
    if(result != NVS_STATUS_SUCCESS)
    {
        DBG_log(LOG_ERROR, "Failed to save device info: %i", result);
        NVS_lock(nvsHandle, NVS_LOCK_NO_WAIT);
        return false;
    }

    NVS_lock(nvsHandle, NVS_LOCK_NO_WAIT);
    return true;
}

调试过程中不会出现锁定和解锁调用问题。

我正在读取和写入的 INFO_DeviceInfo 为91字节。

除了写入时的擦除和 POST_VERIFY 标志之外、我没有看到任何其他东西。  我在编写代码时遵循了此示例。

谢谢 Arthur。 这必须是我的解决方案。

我实际上有一个有关这方面的后续问题。 我的闪存写入失败、如果我不包含擦除标志、则返回-1。 是否需要擦除标志来覆盖闪存中的数据？ 我本来希望 NVS_write()能够覆盖闪存中该地址存在的任何数据，而无需首先擦除整个扇区。