[参考译文] CC3200：如何将/sys/mcuimg2.bin 从 cc3200设备下载到我的本地 PC

您好，

很难说出您的案例发生了什么。 如果没有详细的调试信息，将很难确定发生了什么情况。

CC3200设备无法通过 Uniflash (3.4.1)读取文件。 如果要在 CC3200设备上重新读取文件，您需要执行以下操作：

• 按 Uniflash 软件列出文件系统中的文件(以了解 sFlash 包含的文件)
• 创建您自己的应用程序，该应用程序将通过 SL_ API 读取文件并将其发送出去(例如通过 UART)，您将通过 JTAG 将该应用程序上传到 CC320内部的 RAM 中

1月

有关支持“传输编码：分块化”的示例，您可以参考 CC32xx (CC3220/35) SDK(https://www.ti.com/tool/SIMPLELINK-CC32XX-SDK )中的代码，其中包括通过 HttpClient 库提供的支持(请参阅 source/net/http/HttpClient.c)：

/*
 *  ======== getChunkedData ========
 *  Get chucked transfer encoded data
 */
static int16_t getChunkedData(HTTPClient_CB *cli, char *body, uint32_t len, bool *moreFlag)
{
    bool mFlag = false;
    char crlf;
    int16_t ret = 0;
    uint32_t chunkLen;
    uint32_t buffereddBodyLen = cli->validBufEnd - cli->validBufStart;

    *moreFlag = true;

    /* Check if in the middle of reading response body? */
    chunkLen = cli->bodyLen;
    if (chunkLen == 0)
    {
        ret = readLine(cli, body, len, &mFlag, buffereddBodyLen);
        if (ret < 0)
        {
            return (ret);
        }
        /* Get current chunk length */
        chunkLen = strtoul(body, NULL, 16);
        /* don't need the remaining buffer */
        if (mFlag)
        {
            ret = readLine(cli, body, len, &mFlag , buffereddBodyLen);
            if (ret < 0)
            {
                return (ret);
            }
        }

        if (chunkLen == 0)
        {
            /* skip the rest (trailer headers) */
            if (getCliState(cli,TRAILER_STATE))
            {
                do
                {
                    cli->validBufStart = cli->buf;
                    cli->validBufEnd = cli->buf;
                    ret = SlNetSock_recv(cli->ssock,cli->validBufStart,HTTPClient_BUF_LEN - 1, 0);
                    if (ret < 0)
                    {
                        return (ret);
                    }
                    cli->validBufEnd += ret;
                    *cli->validBufEnd = '\0';
                }while(strstr(cli->validBufStart,HTTPClient_crlfcrlf) == NULL);
                setCliState(cli,TRAILER_STATE,false);
            }
            ret = readLine(cli, &crlf, sizeof(crlf), &mFlag, buffereddBodyLen);
            if (ret < 0)
            {
                return (ret);
            }
            *moreFlag = false;
            setCliState(cli,CHUNKED_STATE,false);
            cli->bodyLen = 0;

            return (0);
        }

        cli->bodyLen = chunkLen;
    }

    if (chunkLen < len)
    {
        len = chunkLen;
    }

    ret = readRawResponseBody(cli, body, len);
    if (ret > 0)
    {
        cli->bodyLen -= ret;
        /* Clean up the CRLF */
        if (cli->bodyLen == 0)
        {
            buffereddBodyLen = cli->validBufEnd - cli->validBufStart;
            chunkLen = readLine(cli, &crlf, sizeof(crlf), &mFlag, buffereddBodyLen);
            if (chunkLen != 0)
            {
                return (chunkLen);
            }
        }
    }
    return (ret);
}

int16_t HTTPClient_readResponseBody(HTTPClient_Handle client, char *body, uint32_t bodyLen,bool *moreDataFlag)
{
    HTTPClient_CB *cli = (HTTPClient_CB *)client;
    int16_t ret = 0;
    uint32_t buffereddBodyLen = 0;

    if ((body == NULL) || (cli == NULL) || (moreDataFlag == NULL))
    {
        return(HTTPClient_ENULLPOINTER);
    }

    buffereddBodyLen = cli->validBufEnd - cli->validBufStart;

    if (buffereddBodyLen > 0)
    {
        if (bodyLen < buffereddBodyLen)
        {
            return(HTTPClient_EBODYBUFSMALL);
        }
        if (!getCliState(cli, CHUNKED_STATE))
        {
            memcpy(body,cli->validBufStart,buffereddBodyLen);
            cli->bodyLen -= buffereddBodyLen;
            cli->validBufEnd = cli->buf;
            cli->validBufStart = cli->buf;
        }
    }
    *moreDataFlag = false;

    if (getCliState(cli, CHUNKED_STATE))
    {
        ret = getChunkedData(cli, body, bodyLen, moreDataFlag);
    }
    else
    {
        if (cli->bodyLen)
        {
            if (cli->bodyLen < (bodyLen - buffereddBodyLen))
            {
                bodyLen = cli->bodyLen;
                ret = SlNetSock_recv(cli->ssock, body + buffereddBodyLen, bodyLen, 0);
            }
            else
            {
                ret = SlNetSock_recv(cli->ssock, body + buffereddBodyLen, bodyLen - buffereddBodyLen, 0);
            }
            if (ret > 0)
            {
                cli->bodyLen -= ret;
                *moreDataFlag = cli->bodyLen ? true : false;
            }
        }
        /* Total bytes that were recieved and which were buffered during header parsing */
        ret += buffereddBodyLen;
    }
    return (ret);
}

我们没有更新的 CC3200文档。  

您应该找到首选服务器，熟悉其用于检查存储库内容和检索下载 URL 的 API。

拥有 URL 后，  您只需触发 HTTP GET 请求。

现有的 OTA 代码可用作如何在设备上安装更新的参考(即，使用  或不使用 FLC lib 将收到的有效负载写入文件系统)。

巴西，

科比

感谢您提供的信息！