Diff: simplelink/cc3100.cpp

Revision:

6:778b081f6a13

Child:

8:f4eb30a34ea7

diff -r d3b320ebd469 -r 778b081f6a13 simplelink/cc3100.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/simplelink/cc3100.cpp	Thu Mar 19 15:39:08 2015 +0000
@@ -0,0 +1,1338 @@
+/*
+* device.c - CC31xx/CC32xx Host Driver Implementation
+*
+* Copyright (C) 2014 Texas Instruments Incorporated - http://www.ti.com/
+*
+*
+*  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.
+*
+*/
+
+
+
+/*****************************************************************************/
+/* Include files                                                             */
+/*****************************************************************************/
+#include "cc3100_simplelink.h"
+#include "cc3100_protocol.h"
+#include "cc3100_sl_common.h"
+#include "cc3100.h"
+
+#include "fPtr_func.h"
+
+
+namespace mbed_cc3100 {	
+
+    uint32_t  g_PingPacketsRecv;
+    uint32_t  g_GatewayIP;
+    uint32_t  g_StationIP;
+    uint32_t  g_DestinationIP;
+    uint32_t  g_BytesReceived; // variable to store the file size 
+    uint32_t  g_Status;
+    uint8_t   g_buff[MAX_BUFF_SIZE+1];
+    int32_t   g_SockID;		
+
+
+cc3100::cc3100(PinName cc3100_irq, PinName cc3100_nHIB, PinName cc3100_cs, SPI cc3100_spi)
+    : _spi(cc3100_irq, cc3100_nHIB, cc3100_cs, cc3100_spi, _driver),
+      _driver(_nonos, _netapp, _flowcont, _spi), _nonos(_driver), _wlan(_driver, _wlan_filters),
+      _wlan_filters(_driver), _netapp(_driver, _nonos), _fs(_driver), _netcfg(_driver),
+      _socket(_driver, _nonos), _flowcont(_driver, _nonos)
+
+       
+{
+
+}
+
+cc3100::~cc3100()
+{
+
+}
+
+/*!
+    \brief This function initializes the application variables
+
+    \param[in]  None
+
+    \return     0 on success, negative error-code on error
+*/
+int32_t cc3100::initializeAppVariables()
+{
+    
+    g_Status = 0;
+    g_PingPacketsRecv = 0;
+    g_StationIP = 0;
+    g_GatewayIP = 0;
+    g_DestinationIP = 0;
+    g_BytesReceived = 0; /* variable to store the file size */
+    g_SockID = 0;
+    memset(g_buff, 0, sizeof(g_buff));
+
+    return SUCCESS;
+}
+    
+/*!
+    \brief Disconnecting from a WLAN Access point
+
+    This function disconnects from the connected AP
+
+    \param[in]      None
+
+    \return         none
+
+    \note
+
+    \warning        If the WLAN disconnection fails, we will be stuck in this function forever.
+*/
+int32_t cc3100::disconnectFromAP()
+{
+    int32_t retVal = -1;
+
+    /*
+     * The function returns 0 if 'Disconnected done', negative number if already disconnected
+     * Wait for 'disconnection' event if 0 is returned, Ignore other return-codes
+     */
+    retVal = _wlan.sl_WlanDisconnect();
+    if(0 == retVal)
+    {
+        /* Wait */
+        while(IS_CONNECTED(g_Status,STATUS_BIT_CONNECTION)) { _nonos._SlNonOsMainLoopTask(); }
+    }
+
+    return SUCCESS;
+}     
+
+/*!
+    \brief This function configure the SimpleLink device in its default state. It:
+           - Sets the mode to STATION
+           - Configures connection policy to Auto and AutoSmartConfig
+           - Deletes all the stored profiles
+           - Enables DHCP
+           - Disables Scan policy
+           - Sets Tx power to maximum
+           - Sets power policy to normal
+           - Unregisters mDNS services
+           - Remove all filters
+
+    \param[in]      none
+
+    \return         On success, zero is returned. On error, negative is returned
+*/
+int32_t cc3100::configureSimpleLinkToDefaultState()
+{
+    SlVersionFull   ver = {0};
+    _WlanRxFilterOperationCommandBuff_t  RxFilterIdMask = {0};
+
+    uint8_t           val = 1;
+    uint8_t           configOpt = 0;
+    uint8_t           configLen = 0;
+    uint8_t           power = 0;
+
+    int32_t          retVal = -1;
+    int32_t          role = -1;
+
+    role = sl_Start(0, 0, 0);
+    ASSERT_ON_ERROR(role);
+
+    /* If the device is not in station-mode, try configuring it in station-mode */
+    if (ROLE_STA != role) {
+        if (ROLE_AP == role) {
+            /* If the device is in AP mode, we need to wait for this event before doing anything */
+            while(!IS_IP_ACQUIRED(g_Status,STATUS_BIT_IP_ACQUIRED)) {
+                _nonos._SlNonOsMainLoopTask();
+            }
+        }
+        
+        /* Switch to STA role and restart */
+        retVal = _wlan.sl_WlanSetMode(ROLE_STA);
+        ASSERT_ON_ERROR(retVal);
+        
+        retVal = sl_Stop(SL_STOP_TIMEOUT);
+        ASSERT_ON_ERROR(retVal);
+
+        retVal = sl_Start(0, 0, 0);
+        ASSERT_ON_ERROR(retVal);
+
+        /* Check if the device is in station again */
+        if (ROLE_STA != retVal) {
+            /* We don't want to proceed if the device is not coming up in station-mode */
+            ASSERT_ON_ERROR(DEVICE_NOT_IN_STATION_MODE);
+        }
+    }
+    
+    /* Get the device's version-information */
+    configOpt = SL_DEVICE_GENERAL_VERSION;
+    configLen = sizeof(ver);
+    retVal = sl_DevGet(SL_DEVICE_GENERAL_CONFIGURATION, &configOpt, &configLen, (uint8_t *)(&ver));
+    ASSERT_ON_ERROR(retVal);
+    
+    /* Set connection policy to Auto + SmartConfig (Device's default connection policy) */
+    retVal = _wlan.sl_WlanPolicySet(SL_POLICY_CONNECTION, SL_CONNECTION_POLICY(1, 0, 0, 0, 1), NULL, 0);
+    ASSERT_ON_ERROR(retVal);
+    
+    /* Remove all profiles */
+    retVal = _wlan.sl_WlanProfileDel(0xFF);
+    ASSERT_ON_ERROR(retVal);
+    
+    /*
+     * Device in station-mode. Disconnect previous connection if any
+     * The function returns 0 if 'Disconnected done', negative number if already disconnected
+     * Wait for 'disconnection' event if 0 is returned, Ignore other return-codes
+     */
+    retVal = _wlan.sl_WlanDisconnect();
+    if(0 == retVal) {
+        /* Wait */
+        while(IS_CONNECTED(g_Status,STATUS_BIT_CONNECTION)) {
+            _nonos._SlNonOsMainLoopTask();
+        }
+    }
+    
+    /* Enable DHCP client*/
+    retVal = _netcfg.sl_NetCfgSet(SL_IPV4_STA_P2P_CL_DHCP_ENABLE,1,1,&val);
+    ASSERT_ON_ERROR(retVal);
+    
+    /* Disable scan */
+    configOpt = SL_SCAN_POLICY(0);
+    retVal = _wlan.sl_WlanPolicySet(SL_POLICY_SCAN , configOpt, NULL, 0);
+    ASSERT_ON_ERROR(retVal);
+    
+    /* Set Tx power level for station mode
+       Number between 0-15, as dB offset from maximum power - 0 will set maximum power */
+    power = 0;
+    retVal = _wlan.sl_WlanSet(SL_WLAN_CFG_GENERAL_PARAM_ID, WLAN_GENERAL_PARAM_OPT_STA_TX_POWER, 1, (uint8_t *)&power);
+    ASSERT_ON_ERROR(retVal);
+    
+    /* Set PM policy to normal */
+    retVal = _wlan.sl_WlanPolicySet(SL_POLICY_PM , SL_NORMAL_POLICY, NULL, 0);
+    ASSERT_ON_ERROR(retVal);
+
+    /* Unregister mDNS services */
+    retVal = _netapp.sl_NetAppMDNSUnRegisterService(0, 0);
+    ASSERT_ON_ERROR(retVal);
+
+    /* Remove  all 64 filters (8*8) */
+    memset(RxFilterIdMask.FilterIdMask, 0xFF, 8);
+    retVal = _wlan_filters.sl_WlanRxFilterSet(SL_REMOVE_RX_FILTER, (uint8_t *)&RxFilterIdMask,
+             sizeof(_WlanRxFilterOperationCommandBuff_t));
+    ASSERT_ON_ERROR(retVal);
+
+    retVal = sl_Stop(SL_STOP_TIMEOUT);
+    ASSERT_ON_ERROR(retVal);
+
+    retVal = initializeAppVariables();
+    ASSERT_ON_ERROR(retVal);
+
+    return retVal; /* Success */
+}
+
+/*!
+    \brief Create UDP socket to communicate with server.
+
+    \param[in]      none
+
+    \return         Socket descriptor for success otherwise negative
+
+    \warning
+*/
+int32_t cc3100::createUDPConnection()
+{
+    int32_t sd = 0;
+
+    sd = _socket.sl_Socket(SL_AF_INET, SL_SOCK_DGRAM, IPPROTO_UDP);
+    if( sd < 0 )
+    {
+        printf("Error creating socket\n\r\n\r");
+    }
+
+    return sd;
+}	
+
+/*!
+    \brief Create connection with server.
+
+    This function opens a socket and create the endpoint communication with server
+
+    \param[in]      DestinationIP - IP address of the server
+
+    \return         socket id for success and negative for error
+*/
+int32_t cc3100::createConnection(uint32_t DestinationIP)
+{
+    SlSockAddrIn_t  Addr = {0};
+    int32_t           Status = 0;
+    int32_t           AddrSize = 0;
+    int32_t           SockID = 0;
+
+    Addr.sin_family = SL_AF_INET;
+    Addr.sin_port = _socket.sl_Htons(80);
+    Addr.sin_addr.s_addr = _socket.sl_Htonl(DestinationIP);
+
+    AddrSize = sizeof(SlSockAddrIn_t);
+
+    SockID = _socket.sl_Socket(SL_AF_INET,SL_SOCK_STREAM, 0);
+    ASSERT_ON_ERROR(SockID);
+
+    Status = _socket.sl_Connect(SockID, ( SlSockAddr_t *)&Addr, AddrSize);
+    if (Status < 0)
+    {
+        _socket.sl_Close(SockID);
+        ASSERT_ON_ERROR(Status);
+    }
+
+    return SockID;
+}
+
+/*!
+    \brief Convert hex to decimal base
+
+    \param[in]      ptr - pointer to string containing number in hex
+
+    \return         number in decimal base
+
+*/
+int32_t cc3100::hexToi(unsigned char *ptr)
+{
+    uint32_t result = 0;
+    uint32_t len = 0;
+
+    int32_t  idx = -1;
+
+    len = strlen((const char*) ptr);
+
+    /* convert characters to upper case */
+    for(idx = 0; ptr[idx] != '\0'; ++idx)
+    {
+        if( (ptr[idx] >= 'a') &&
+            (ptr[idx] <= 'f') )
+        {
+            ptr[idx] -= 32;         /* Change case - ASCII 'a' = 97, 'A' = 65 => 97-65 = 32 */
+        }
+    }
+
+    for(idx = 0; ptr[idx] != '\0'; ++idx)
+    {
+        if(ptr[idx] >= '0' && ptr[idx] <= '9')
+        {
+            /* Converting '0' to '9' to their decimal value */
+            result += (ptr[idx] - '0') * (1 << (4 * (len - 1 - idx)));
+        }
+        else if(ptr[idx] >= 'A' && ptr[idx] <= 'F')
+        {
+            /* Converting hex 'A' to 'F' to their decimal value */
+            result += (ptr[idx] - 55) * (1 << (4 * (len -1 - idx))); /* .i.e. 'A' - 55 = 10, 'F' - 55 = 15 */
+        }
+        else
+        {
+            ASSERT_ON_ERROR(INVALID_HEX_STRING);
+        }
+    }
+
+    return result;
+}
+
+/*!
+    \brief Calculate the file chunk size
+
+    \param[in]      len - pointer to length of the data in the buffer
+    \param[in]      p_Buff - pointer to pointer of buffer containing data
+    \param[out]     chunk_size - pointer to variable containing chunk size
+
+    \return         0 for success, -ve for error
+
+*/
+int32_t cc3100::getChunkSize(int32_t *len, uint8_t **p_Buff, uint32_t *chunk_size)
+{
+    int32_t   idx = -1;
+    unsigned char   lenBuff[10];
+
+    idx = 0;
+    memset(lenBuff, 0, sizeof(lenBuff));
+    while(*len >= 0 && **p_Buff != 13) /* check for <CR> */
+    {
+        if(0 == *len)
+        {
+            memset(g_buff, 0, sizeof(g_buff));
+            *len = _socket.sl_Recv(g_SockID, &g_buff[0], MAX_BUFF_SIZE, 0);
+            if(*len <= 0)
+                ASSERT_ON_ERROR(TCP_RECV_ERROR);
+
+            *p_Buff = g_buff;
+        }
+
+        lenBuff[idx] = **p_Buff;
+        idx++;
+        (*p_Buff)++;
+        (*len)--;
+    }
+
+    (*p_Buff) += 2; /* skip <CR><LF> */
+    (*len) -= 2;
+    *chunk_size = hexToi(lenBuff);
+
+    return SUCCESS;
+}
+
+/*!
+    \brief Obtain the file from the server
+
+    This function requests the file from the server and save it on serial flash.
+    To request a different file for different user needs to modify the
+    PREFIX_BUFFER and POST_BUFFER macros.
+
+    \param[in]      None
+
+    \return         0 for success and negative for error
+
+*/
+/*
+int32_t cc3100::getFile()
+{
+    uint32_t Token = 0;
+    uint32_t recv_size = 0;
+    uint8_t *pBuff = 0;
+    uint8_t eof_detected = 0;
+    uint8_t isChunked = 0;
+
+    int32_t transfer_len = -1;
+    int32_t retVal = -1;
+    int32_t fileHandle = -1;
+
+    memset(g_buff, 0, sizeof(g_buff));
+
+    //Puts together the HTTP GET string.
+    strcpy((char*)g_buff, PREFIX_BUFFER);
+    strcat((char*)g_buff, POST_BUFFER);
+
+    //Send the HTTP GET string to the opened TCP/IP socket.
+    transfer_len = _socket.sl_Send(g_SockID, g_buff, strlen((const char*)g_buff), 0);
+
+    if (transfer_len < 0)
+    {
+        // error 
+        printf(" Socket Send Error\r\n");
+        ASSERT_ON_ERROR(TCP_SEND_ERROR);
+    }
+
+    memset(g_buff, 0, sizeof(g_buff));
+
+    //get the reply from the server in buffer.
+    transfer_len = _socket.sl_Recv(g_SockID, &g_buff[0], MAX_BUFF_SIZE, 0);
+
+    if(transfer_len <= 0)
+        ASSERT_ON_ERROR(TCP_RECV_ERROR);
+
+    // Check for 404 return code 
+    if(strstr((const char*)g_buff, HTTP_FILE_NOT_FOUND) != 0)
+    {
+        printf(" File not found, check the file and try again\r\n");
+        ASSERT_ON_ERROR(FILE_NOT_FOUND_ERROR);
+    }
+
+    // if not "200 OK" return error 
+    if(strstr((const char*)g_buff, HTTP_STATUS_OK) == 0)
+    {
+        printf(" Error during downloading the file\r\n");
+        ASSERT_ON_ERROR(INVALID_SERVER_RESPONSE);
+    }
+
+    // check if content length is transferred with headers 
+    pBuff = (uint8_t *)strstr((const char*)g_buff, HTTP_CONTENT_LENGTH);
+    if(pBuff != 0)
+    {
+        // not supported 
+        printf(" Server response format is not supported\r\n");
+        ASSERT_ON_ERROR(FORMAT_NOT_SUPPORTED);
+    }
+
+    // Check if data is chunked 
+    pBuff = (uint8_t *)strstr((const char*)g_buff, HTTP_TRANSFER_ENCODING);
+    if(pBuff != 0)
+    {
+        pBuff += strlen(HTTP_TRANSFER_ENCODING);
+        while(*pBuff == SPACE)
+            pBuff++;
+
+        if(memcmp(pBuff, HTTP_ENCODING_CHUNKED, strlen(HTTP_ENCODING_CHUNKED)) == 0)
+        {
+            recv_size = 0;
+            isChunked = 1;
+        }
+    }
+    else
+    {
+        // Check if connection will be closed by after sending data
+         // In this method the content length is not received and end of
+         // connection marks the end of data 
+        pBuff = (uint8_t *)strstr((const char*)g_buff, HTTP_CONNECTION);
+        if(pBuff != 0)
+        {
+            pBuff += strlen(HTTP_CONNECTION);
+            while(*pBuff == SPACE)
+                pBuff++;
+
+            if(memcmp(pBuff, HTTP_ENCODING_CHUNKED, strlen(HTTP_CONNECTION_CLOSE)) == 0)
+            {
+                // not supported 
+                printf(" Server response format is not supported\r\n");
+                ASSERT_ON_ERROR(FORMAT_NOT_SUPPORTED);
+            }
+        }
+    }
+
+    // "\r\n\r\n" marks the end of headers 
+    pBuff = (uint8_t *)strstr((const char*)g_buff, HTTP_END_OF_HEADER);
+    if(pBuff == 0)
+    {
+        printf(" Invalid response\r\n");
+        ASSERT_ON_ERROR(INVALID_SERVER_RESPONSE);
+    }
+    // Increment by 4 to skip "\r\n\r\n" 
+    pBuff += 4;
+
+    // Adjust buffer data length for header size 
+    transfer_len -= (pBuff - g_buff);
+
+    // If data in chunked format, calculate the chunk size 
+    if(isChunked == 1)
+    {
+        retVal = getChunkSize(&transfer_len, &pBuff, &recv_size);
+        if(retVal < 0)
+        {
+            // Error 
+            printf(" Problem with connection to server\r\n");
+            return retVal;
+        }
+    }
+
+    // Open file to save the downloaded file 
+    retVal = _fs.sl_FsOpen((uint8_t *)FILE_NAME,
+                       FS_MODE_OPEN_WRITE, &Token, &fileHandle);
+    if(retVal < 0)
+    {
+        // File Doesn't exit create a new of 45 KB file 
+        retVal = _fs.sl_FsOpen((uint8_t *)FILE_NAME,
+                           _fs.FS_MODE_OPEN_CREATE(SIZE_45K,_FS_FILE_OPEN_FLAG_COMMIT|_FS_FILE_PUBLIC_WRITE),
+                           &Token, &fileHandle);
+        if(retVal < 0)
+        {
+            printf(" Error during opening the file\r\n");
+            return retVal;
+        }
+    }
+
+    while (0 < transfer_len)
+    {
+        // For chunked data recv_size contains the chunk size to be received
+         // while the transfer_len contains the data in the buffer 
+        if(recv_size <= transfer_len)
+        {
+            // write the recv_size 
+            retVal = _fs.sl_FsWrite(fileHandle, g_BytesReceived,
+                    (uint8_t *)pBuff, recv_size);
+            if(retVal < recv_size)
+            {
+                // Close file without saving 
+                retVal = _fs.sl_FsClose(fileHandle, 0, (unsigned char*)"A", 1);
+                printf(" Error during writing the file\r\n");
+                return FILE_WRITE_ERROR;
+            }
+            transfer_len -= recv_size;
+            g_BytesReceived +=recv_size;
+            pBuff += recv_size;
+            recv_size = 0;
+
+            if(isChunked == 1)
+            {
+                // if data in chunked format calculate next chunk size 
+                pBuff += 2; // 2 bytes for <CR> <LF> 
+                transfer_len -= 2;
+
+                if(getChunkSize(&transfer_len, &pBuff, &recv_size) < 0)
+                {
+                    // Error 
+                    break;
+                }
+
+                // if next chunk size is zero we have received the complete file 
+                if(recv_size == 0)
+                {
+                    eof_detected = 1;
+                    break;
+                }
+
+                if(recv_size < transfer_len)
+                {
+                    // Code will enter this section if the new chunk size is less then
+                     // then the transfer size. This will the last chunk of file received
+                     
+                    retVal = _fs.sl_FsWrite(fileHandle, g_BytesReceived,
+                            (uint8_t *)pBuff, recv_size);
+                    if(retVal < recv_size)
+                    {
+                        // Close file without saving 
+                        retVal = _fs.sl_FsClose(fileHandle, 0, (unsigned char*)"A", 1);
+                        printf(" Error during writing the file\r\n");
+                        return FILE_WRITE_ERROR;
+                    }
+                    transfer_len -= recv_size;
+                    g_BytesReceived +=recv_size;
+                    pBuff += recv_size;
+                    recv_size = 0;
+
+                    pBuff += 2; // 2bytes for <CR> <LF> 
+                    transfer_len -= 2;
+
+                    // Calculate the next chunk size, should be zero 
+                    if(getChunkSize(&transfer_len, &pBuff, &recv_size) < 0)
+                    {
+                        // Error 
+                        break;
+                    }
+
+                    // if next chunk size is non zero error 
+                    if(recv_size != 0)
+                    {
+                        // Error 
+                        break;
+                    }
+                    eof_detected = 1;
+                    break;
+                }
+                else
+                {
+                    // write data on the file 
+                    retVal = _fs.sl_FsWrite(fileHandle, g_BytesReceived,
+                            (uint8_t *)pBuff, transfer_len);
+                    if(retVal < transfer_len)
+                    {
+                        // Close file without saving 
+                        retVal = _fs.sl_FsClose(fileHandle, 0, (unsigned char*)"A", 1);
+                        printf(" Error during writing the file\r\n");
+                        ASSERT_ON_ERROR(FILE_WRITE_ERROR);
+                    }
+                    recv_size -= transfer_len;
+                    g_BytesReceived +=transfer_len;
+                }
+            }
+            // complete file received exit 
+            if(recv_size == 0)
+            {
+                eof_detected = 1;
+                break;
+            }
+        }
+        else
+        {
+            // write data on the file 
+            retVal = _fs.sl_FsWrite(fileHandle, g_BytesReceived,
+                                 (uint8_t *)pBuff, transfer_len);
+            if (retVal < 0)
+            {
+                // Close file without saving 
+                retVal = _fs.sl_FsClose(fileHandle, 0, (unsigned char*)"A", 1);
+                printf(" Error during writing the file\r\n");
+                ASSERT_ON_ERROR(FILE_WRITE_ERROR);
+            }
+            g_BytesReceived +=transfer_len;
+            recv_size -= transfer_len;
+        }
+
+        memset(g_buff, 0, sizeof(g_buff));
+
+        transfer_len = _socket.sl_Recv(g_SockID, &g_buff[0], MAX_BUFF_SIZE, 0);
+        if(transfer_len <= 0)
+            ASSERT_ON_ERROR(TCP_RECV_ERROR);
+
+        pBuff = g_buff;
+    }
+
+    // If user file has checksum which can be used to verify the temporary
+     // file then file should be verified
+     // In case of invalid file (FILE_NAME) should be closed without saving to
+     // recover the previous version of file 
+    if(0 > transfer_len || eof_detected == 0)
+    {
+        // Close file without saving 
+        retVal = _fs.sl_FsClose(fileHandle, 0, (unsigned char*)"A", 1);
+        printf(" Error While File Download\r\n");
+        ASSERT_ON_ERROR(INVALID_FILE);
+    }
+    else
+    {
+        // Save and close file 
+        retVal = _fs.sl_FsClose(fileHandle, 0, 0, 0);
+        ASSERT_ON_ERROR(retVal);
+    }
+
+    return SUCCESS;;
+}
+*/
+
+/*!
+    \brief Connecting to a WLAN Access point
+
+    This function connects to the required AP (SSID_NAME).
+    The function will return once we are connected and have acquired IP address
+
+    \param[in]  None
+
+    \return     0 on success, negative error-code on error
+
+    \note
+
+    \warning    If the WLAN connection fails or we don't acquire an IP address,
+                We will be stuck in this function forever.
+*/
+int32_t cc3100::establishConnectionWithAP()
+{
+    
+    SlSecParams_t secParams = {0};
+    int32_t retVal = 0;
+
+    secParams.Key = (signed char *)PASSKEY;
+    secParams.KeyLen = strlen(PASSKEY);
+    secParams.Type = SEC_TYPE;
+
+    retVal = _wlan.sl_WlanConnect((signed char *)SSID_NAME, strlen(SSID_NAME), 0, &secParams, 0);
+    ASSERT_ON_ERROR(retVal);
+    
+    /* Wait */
+    while((!IS_CONNECTED(g_Status,STATUS_BIT_CONNECTION)) || (!IS_IP_ACQUIRED(g_Status,STATUS_BIT_IP_ACQUIRED))) { _nonos._SlNonOsMainLoopTask(); }
+
+    return SUCCESS;
+}
+
+/*!
+    \brief This function checks the LAN connection by pinging the AP's gateway
+
+    \param[in]  None
+
+    \return     0 on success, negative error-code on error
+*/
+int32_t cc3100::checkLanConnection()
+{
+    SlPingStartCommand_t pingParams = {0};
+    SlPingReport_t pingReport = {0};
+
+    int32_t retVal = -1;
+
+    CLR_STATUS_BIT(g_Status, STATUS_BIT_PING_DONE);
+    g_PingPacketsRecv = 0;
+
+    /* Set the ping parameters */
+    pingParams.PingIntervalTime = PING_INTERVAL;
+    pingParams.PingSize = PING_PKT_SIZE;
+    pingParams.PingRequestTimeout = PING_TIMEOUT;
+    pingParams.TotalNumberOfAttempts = PING_ATTEMPTS;
+    pingParams.Flags = 0;
+    pingParams.Ip = g_GatewayIP;
+
+    /* Check for LAN connection */
+    retVal = _netapp.sl_NetAppPingStart( (SlPingStartCommand_t*)&pingParams, SL_AF_INET,
+                                 (SlPingReport_t*)&pingReport, SimpleLinkPingReport);
+    ASSERT_ON_ERROR(retVal);
+
+    /* Wait */
+    while(!IS_PING_DONE(g_Status,STATUS_BIT_PING_DONE)) { _nonos._SlNonOsMainLoopTask(); }
+
+    if(0 == g_PingPacketsRecv)
+    {
+        /* Problem with LAN connection */
+        ASSERT_ON_ERROR(LAN_CONNECTION_FAILED);
+    }
+
+    /* LAN connection is successful */
+    return SUCCESS;
+}
+
+/*!
+    \brief This function checks the internet connection by pinging
+           the external-host (HOST_NAME)
+
+    \param[in]  None
+
+    \return     0 on success, negative error-code on error
+*/
+int32_t cc3100::checkInternetConnection()
+{
+    SlPingStartCommand_t pingParams = {0};
+    SlPingReport_t pingReport = {0};
+
+    uint32_t ipAddr = 0;
+
+    int32_t retVal = -1;
+
+    CLR_STATUS_BIT(g_Status, STATUS_BIT_PING_DONE);
+    g_PingPacketsRecv = 0;
+
+    /* Set the ping parameters */
+    pingParams.PingIntervalTime = PING_INTERVAL;
+    pingParams.PingSize = PING_PKT_SIZE;
+    pingParams.PingRequestTimeout = PING_TIMEOUT;
+    pingParams.TotalNumberOfAttempts = PING_ATTEMPTS;
+    pingParams.Flags = 0;
+    pingParams.Ip = g_GatewayIP;
+
+    /* Check for Internet connection */
+    retVal = _netapp.sl_NetAppDnsGetHostByName((unsigned char *)HOST_NAME, strlen(HOST_NAME), &ipAddr, SL_AF_INET);
+    ASSERT_ON_ERROR(retVal);
+
+    /* Replace the ping address to match HOST_NAME's IP address */
+    pingParams.Ip = ipAddr;
+
+    /* Try to ping HOST_NAME */
+    retVal = _netapp.sl_NetAppPingStart( (SlPingStartCommand_t*)&pingParams, SL_AF_INET,
+                                 (SlPingReport_t*)&pingReport, SimpleLinkPingReport);
+    ASSERT_ON_ERROR(retVal);
+
+    /* Wait */
+    while(!IS_PING_DONE(g_Status,STATUS_BIT_PING_DONE)) { _nonos._SlNonOsMainLoopTask(); }
+
+    if (0 == g_PingPacketsRecv)
+    {
+        /* Problem with internet connection*/
+        ASSERT_ON_ERROR(INTERNET_CONNECTION_FAILED);
+    }
+
+    /* Internet connection is successful */
+    return SUCCESS;
+}
+
+const int8_t StartResponseLUT[8] = 
+{
+    ROLE_UNKNOWN_ERR,
+    ROLE_STA,
+    ROLE_STA_ERR,
+    ROLE_AP,
+    ROLE_AP_ERR,
+    ROLE_P2P,
+    ROLE_P2P_ERR,
+    ROLE_UNKNOWN_ERR    
+};
+    
+/*****************************************************************************/
+/* Internal functions                                                        */
+/*****************************************************************************/
+
+int16_t cc3100::_sl_GetStartResponseConvert(uint32_t Status)
+{
+    return (int16_t)StartResponseLUT[Status & 0x7];
+    
+}
+
+/*****************************************************************************/
+/* API Functions                                                             */
+/*****************************************************************************/
+
+bool cc3100::IS_PING_DONE(uint32_t status_variable,const uint32_t bit){
+	
+	    g_Status = status_variable;
+	    
+	    if(0 != (g_Status & ((uint32_t)1L<<(bit)))){
+	    	return TRUE;
+        }else{
+        	return FALSE;
+        }
+}
+        
+bool cc3100::IS_CONNECTED(uint32_t status_variable,const uint32_t bit){
+	
+	    g_Status = status_variable;
+	    
+	    if(0 != (g_Status & ((uint32_t)1L<<(bit)))){
+	    	return TRUE;
+        }else{
+        	return FALSE;
+        }
+}
+        
+bool cc3100::IS_STA_CONNECTED(uint32_t status_variable,const uint32_t bit){
+	
+	    g_Status = status_variable;
+	    
+	    if(0 != (g_Status & ((uint32_t)1L<<(bit)))){
+	    	return TRUE;
+        }else{
+        	return FALSE;
+        }
+} 
+       
+bool cc3100::IS_IP_ACQUIRED(uint32_t status_variable,const uint32_t bit){
+	
+	    g_Status = status_variable;
+	    
+	    if(0 != (g_Status & ((uint32_t)1L<<(bit)))){
+	    	return TRUE;
+        }else{
+        	return FALSE;
+        }
+}
+        
+bool cc3100::IS_IP_LEASED(uint32_t status_variable,const uint32_t bit){
+	
+	    g_Status = status_variable;
+	    
+	    if(0 != (g_Status & ((uint32_t)1L<<(bit)))){
+	    	return TRUE;
+        }else{
+        	return FALSE;
+        }
+}
+        
+bool cc3100::IS_CONNECTION_FAILED(uint32_t status_variable,const uint32_t bit){
+	    
+	    g_Status = status_variable;
+	    
+	    if(0 != (g_Status & ((uint32_t)1L<<(bit)))){
+	    	return TRUE;
+        }else{
+        	return FALSE;
+        }
+}
+        
+bool cc3100::IS_P2P_NEG_REQ_RECEIVED(uint32_t status_variable,const uint32_t bit){
+	
+	    g_Status = status_variable;
+	    
+	    if(0 != (g_Status & ((uint32_t)1L<<(bit)))){
+	    	return TRUE;
+        }else{
+        	return FALSE;
+        }
+}
+        
+bool cc3100::IS_SMARTCONFIG_DONE(uint32_t status_variable,const uint32_t bit){
+	
+	    g_Status = status_variable;
+	    
+	    if(0 != (g_Status & ((uint32_t)1L<<(bit)))){
+	    	return TRUE;
+        }else{
+        	return FALSE;
+        }
+}
+        
+bool cc3100::IS_SMARTCONFIG_STOPPED(uint32_t status_variable,const uint32_t bit){
+	
+	    g_Status = status_variable;
+	    
+	    if(0 != (g_Status & ((uint32_t)1L<<(bit)))){	    	
+	    	return TRUE;
+        }else{
+        	return FALSE;       	
+        }        
+}
+
+void cc3100::CLR_STATUS_BIT(uint32_t status_variable, const uint32_t bit){
+	    
+	    g_Status = status_variable;
+	    g_Status &= ~((uint32_t)1L<<(bit));
+	    
+}
+
+void cc3100::SET_STATUS_BIT(uint32_t status_variable, const uint32_t bit){
+
+	    g_Status = status_variable;
+	    g_Status |= ((uint32_t)1L<<(bit));
+	    
+}
+	    
+/*****************************************************************************/
+/* sl_Task                                                                   */
+/*****************************************************************************/
+#if _SL_INCLUDE_FUNC(sl_Task)
+void cc3100::sl_Task(void)
+{
+#ifdef _SlTaskEntry
+    _nonos._SlNonOsMainLoopTask;
+    
+#endif
+}
+#endif
+
+/*****************************************************************************/
+/* sl_Start                                                                  */
+/*****************************************************************************/
+#if _SL_INCLUDE_FUNC(sl_Start)
+int16_t cc3100::sl_Start(const void* pIfHdl, int8_t*  pDevName, const P_INIT_CALLBACK pInitCallBack)
+{
+    int16_t ObjIdx = MAX_CONCURRENT_ACTIONS;
+    InitComplete_t  AsyncRsp;
+
+    /* Perform any preprocessing before enable networking services */
+    sl_DeviceEnablePreamble();//stub only
+    
+    /* ControlBlock init */
+    _driver._SlDrvDriverCBInit();
+    
+    /* open the interface: usually SPI or UART */
+    if (NULL == pIfHdl) 
+    {
+        g_pCB->FD = _spi.spi_Open((int8_t *)pDevName, 0);
+    } 
+    else 
+    {
+        g_pCB->FD = (_SlFd_t)pIfHdl;
+    }
+       
+    ObjIdx = _driver._SlDrvProtectAsyncRespSetting((uint8_t *)&AsyncRsp, START_STOP_ID, SL_MAX_SOCKETS);
+    
+    if (MAX_CONCURRENT_ACTIONS == ObjIdx) 
+    {
+        printf("SL_POOL_IS_EMPTY\r\n");
+        return SL_POOL_IS_EMPTY;
+    }
+
+    if( g_pCB->FD >= (_SlFd_t)0) {
+        _spi.CC3100_disable();
+        
+        g_pCB->pInitCallback = pInitCallBack;
+            
+        _spi.CC3100_enable();
+
+        if (NULL == pInitCallBack) {
+            
+            _driver._SlDrvSyncObjWaitForever(&g_pCB->ObjPool[ObjIdx].SyncObj);
+            
+            /*release Pool Object*/           
+            _driver._SlDrvReleasePoolObj(g_pCB->FunctionParams.AsyncExt.ActionIndex);            
+            return _sl_GetStartResponseConvert(AsyncRsp.Status);
+        }
+        else
+        {
+            return SL_RET_CODE_OK;    
+        }
+    }
+    
+    return SL_BAD_INTERFACE;
+
+
+}
+#endif
+
+/***************************************************************************
+_sl_HandleAsync_InitComplete - handles init complete signalling to
+a waiting object
+****************************************************************************/
+void cc3100::_sl_HandleAsync_InitComplete(void *pVoidBuf)
+{
+
+    InitComplete_t *pMsgArgs = (InitComplete_t *)_SL_RESP_ARGS_START(pVoidBuf);
+
+    _driver._SlDrvProtectionObjLockWaitForever();
+
+    if(g_pCB->pInitCallback) {
+        g_pCB->pInitCallback(_sl_GetStartResponseConvert(pMsgArgs->Status));
+    } else {
+        memcpy(g_pCB->ObjPool[g_pCB->FunctionParams.AsyncExt.ActionIndex].pRespArgs, pMsgArgs, sizeof(InitComplete_t));        
+        _driver._SlDrvSyncObjSignal(&g_pCB->ObjPool[g_pCB->FunctionParams.AsyncExt.ActionIndex].SyncObj);
+    }
+    _driver._SlDrvProtectionObjUnLock();
+
+    if(g_pCB->pInitCallback) {
+        _driver._SlDrvReleasePoolObj(g_pCB->FunctionParams.AsyncExt.ActionIndex);
+    }
+
+}
+
+/*****************************************************************************
+sl_stop
+******************************************************************************/
+typedef union {
+    _DevStopCommand_t  Cmd;
+    _BasicResponse_t   Rsp;
+} _SlStopMsg_u;
+
+const _SlCmdCtrl_t _SlStopCmdCtrl = {
+    SL_OPCODE_DEVICE_STOP_COMMAND,
+    sizeof(_DevStopCommand_t),
+    sizeof(_BasicResponse_t)
+};
+
+#if _SL_INCLUDE_FUNC(sl_Stop)
+int16_t cc3100::sl_Stop(const uint16_t timeout)
+{
+    int16_t RetVal=0;
+    _SlStopMsg_u      Msg;
+    _BasicResponse_t  AsyncRsp;
+    int8_t ObjIdx = MAX_CONCURRENT_ACTIONS;
+    /* if timeout is 0 the shutdown is forced immediately */
+    if( 0 == timeout ) {
+        _spi.registerInterruptHandler(NULL, NULL);
+        _spi.CC3100_disable();
+        RetVal = _spi.spi_Close(g_pCB->FD);
+
+    } else {
+        /* let the device make the shutdown using the defined timeout */
+        Msg.Cmd.Timeout = timeout;
+        
+        
+        
+        
+        
+        ObjIdx = _driver._SlDrvProtectAsyncRespSetting((uint8_t *)&AsyncRsp, START_STOP_ID, SL_MAX_SOCKETS);
+      if (MAX_CONCURRENT_ACTIONS == ObjIdx)
+      {
+          return SL_POOL_IS_EMPTY;
+      }
+
+      VERIFY_RET_OK(_driver._SlDrvCmdOp((_SlCmdCtrl_t *)&_SlStopCmdCtrl, &Msg, NULL));
+
+      if(SL_OS_RET_CODE_OK == (int16_t)Msg.Rsp.status)
+      {
+         _driver._SlDrvSyncObjWaitForever(&g_pCB->ObjPool[ObjIdx].SyncObj);
+         Msg.Rsp.status = AsyncRsp.status;
+         RetVal = Msg.Rsp.status;
+      }
+
+      _driver._SlDrvReleasePoolObj((uint8_t)ObjIdx);
+
+      _spi.registerInterruptHandler(NULL, NULL);
+      _spi.CC3100_disable();
+      _spi.spi_Close(g_pCB->FD);
+    }
+    _driver._SlDrvDriverCBDeinit();
+
+    return RetVal;
+}
+#endif
+
+
+/*****************************************************************************
+sl_EventMaskSet
+*****************************************************************************/
+typedef union {
+    _DevMaskEventSetCommand_t	    Cmd;
+    _BasicResponse_t	            Rsp;
+} _SlEventMaskSetMsg_u;
+
+#if _SL_INCLUDE_FUNC(sl_EventMaskSet)
+const _SlCmdCtrl_t _SlEventMaskSetCmdCtrl = {
+    SL_OPCODE_DEVICE_EVENTMASKSET,
+    sizeof(_DevMaskEventSetCommand_t),
+    sizeof(_BasicResponse_t)
+};
+
+int16_t cc3100::sl_EventMaskSet(uint8_t EventClass , uint32_t Mask)
+{
+    _SlEventMaskSetMsg_u Msg;
+    Msg.Cmd.group = EventClass;
+    Msg.Cmd.mask = Mask;
+
+    VERIFY_RET_OK(_driver._SlDrvCmdOp((_SlCmdCtrl_t *)&_SlEventMaskSetCmdCtrl, &Msg, NULL));
+
+    return (int16_t)Msg.Rsp.status;
+}
+#endif
+
+/******************************************************************************
+sl_EventMaskGet
+******************************************************************************/
+typedef union {
+    _DevMaskEventGetCommand_t	    Cmd;
+    _DevMaskEventGetResponse_t      Rsp;
+} _SlEventMaskGetMsg_u;
+
+#if _SL_INCLUDE_FUNC(sl_EventMaskGet)
+const _SlCmdCtrl_t _SlEventMaskGetCmdCtrl = {
+    SL_OPCODE_DEVICE_EVENTMASKGET,
+    sizeof(_DevMaskEventGetCommand_t),
+    sizeof(_DevMaskEventGetResponse_t)
+};
+
+int16_t cc3100::sl_EventMaskGet(uint8_t EventClass, uint32_t *pMask)
+{
+    _SlEventMaskGetMsg_u Msg;
+
+    Msg.Cmd.group = EventClass;
+
+    VERIFY_RET_OK(_driver._SlDrvCmdOp((_SlCmdCtrl_t *)&_SlEventMaskGetCmdCtrl, &Msg, NULL));
+
+    *pMask = Msg.Rsp.mask;
+    return SL_RET_CODE_OK;
+}
+#endif
+
+/******************************************************************************
+sl_DevGet
+******************************************************************************/
+
+typedef union {
+    _DeviceSetGet_t	    Cmd;
+    _DeviceSetGet_t	    Rsp;
+} _SlDeviceMsgGet_u;
+
+#if _SL_INCLUDE_FUNC(sl_DevGet)
+const _SlCmdCtrl_t _SlDeviceGetCmdCtrl = {
+    SL_OPCODE_DEVICE_DEVICEGET,
+    sizeof(_DeviceSetGet_t),
+    sizeof(_DeviceSetGet_t)
+};
+
+int32_t cc3100::sl_DevGet(uint8_t DeviceGetId, uint8_t *pOption,uint8_t *pConfigLen, uint8_t *pValues)
+{
+    _SlDeviceMsgGet_u         Msg;
+    _SlCmdExt_t               CmdExt;
+    
+    if (*pConfigLen == 0) {
+        return SL_EZEROLEN;
+    }
+   
+    if( pOption ) {
+        _driver._SlDrvResetCmdExt(&CmdExt);
+        CmdExt.RxPayloadLen = *pConfigLen;
+        
+        CmdExt.pRxPayload = (uint8_t *)pValues;
+        
+
+        Msg.Cmd.DeviceSetId = DeviceGetId;
+
+        Msg.Cmd.Option   = (uint16_t)*pOption;
+
+        VERIFY_RET_OK(_driver._SlDrvCmdOp((_SlCmdCtrl_t *)&_SlDeviceGetCmdCtrl, &Msg, &CmdExt));
+        
+        if( pOption ) {
+            *pOption = (uint8_t)Msg.Rsp.Option;
+        }
+        
+        if (CmdExt.RxPayloadLen < CmdExt.ActualRxPayloadLen) {
+            *pConfigLen = (uint8_t)CmdExt.RxPayloadLen;
+            return SL_ESMALLBUF;
+        } else {
+            *pConfigLen = (uint8_t)CmdExt.ActualRxPayloadLen;
+        }
+        
+        return (int16_t)Msg.Rsp.Status;
+    } else {
+        return -1;
+    }
+}
+#endif
+
+/******************************************************************************
+sl_DevSet
+******************************************************************************/
+typedef union {
+    _DeviceSetGet_t    Cmd;
+    _BasicResponse_t   Rsp;
+} _SlDeviceMsgSet_u;
+
+#if _SL_INCLUDE_FUNC(sl_DevSet)
+const _SlCmdCtrl_t _SlDeviceSetCmdCtrl = {
+    SL_OPCODE_DEVICE_DEVICESET,
+    sizeof(_DeviceSetGet_t),
+    sizeof(_BasicResponse_t)
+};
+
+int32_t cc3100::sl_DevSet(const uint8_t DeviceSetId, const uint8_t Option, const uint8_t ConfigLen, const uint8_t *pValues)
+{
+    _SlDeviceMsgSet_u         Msg;
+    _SlCmdExt_t               CmdExt;
+    
+    _driver._SlDrvResetCmdExt(&CmdExt);
+    CmdExt.TxPayloadLen = (ConfigLen+3) & (~3);
+    
+    CmdExt.pTxPayload = (uint8_t *)pValues;
+    
+
+
+    Msg.Cmd.DeviceSetId    = DeviceSetId;
+    Msg.Cmd.ConfigLen   = ConfigLen;
+    Msg.Cmd.Option   = Option;
+
+    VERIFY_RET_OK(_driver._SlDrvCmdOp((_SlCmdCtrl_t *)&_SlDeviceSetCmdCtrl, &Msg, &CmdExt));
+
+    return (int16_t)Msg.Rsp.status;
+}
+#endif
+
+/******************************************************************************
+sl_UartSetMode
+******************************************************************************/
+#ifdef SL_IF_TYPE_UART
+typedef union {
+    _DevUartSetModeCommand_t	  Cmd;
+    _DevUartSetModeResponse_t     Rsp;
+} _SlUartSetModeMsg_u;
+
+#if _SL_INCLUDE_FUNC(sl_UartSetMode)
+const _SlCmdCtrl_t _SlUartSetModeCmdCtrl = {
+    SL_OPCODE_DEVICE_SETUARTMODECOMMAND,
+    sizeof(_DevUartSetModeCommand_t),
+    sizeof(_DevUartSetModeResponse_t)
+};
+
+int16_t cc3100::sl_UartSetMode(const SlUartIfParams_t* pUartParams)
+{
+    _SlUartSetModeMsg_u Msg;
+    uint32_t magicCode = 0xFFFFFFFF;
+
+    Msg.Cmd.BaudRate = pUartParams->BaudRate;
+    Msg.Cmd.FlowControlEnable = pUartParams->FlowControlEnable;
+
+
+    VERIFY_RET_OK(_SlDrvCmdOp((_SlCmdCtrl_t *)&_SlUartSetModeCmdCtrl, &Msg, NULL));
+
+    /* cmd response OK, we can continue with the handshake */
+    if (SL_RET_CODE_OK == Msg.Rsp.status) {
+        sl_IfMaskIntHdlr();
+
+        /* Close the comm port */
+        sl_IfClose(g_pCB->FD);
+
+        /* Re-open the comm port */
+        sl_IfOpen((void * )pUartParams, UART_IF_OPEN_FLAG_RE_OPEN);
+        sl_IfUnMaskIntHdlr();
+
+        /* send the magic code and wait for the response */
+        sl_IfWrite(g_pCB->FD, (uint8_t* )&magicCode, 4);
+
+        magicCode = UART_SET_MODE_MAGIC_CODE;
+        sl_IfWrite(g_pCB->FD, (uint8_t* )&magicCode, 4);
+
+        /* clear magic code */
+        magicCode = 0;
+
+        /* wait (blocking) till the magic code to be returned from device */
+        sl_IfRead(g_pCB->FD, (uint8_t* )&magicCode, 4);
+
+        /* check for the received magic code matching */
+        if (UART_SET_MODE_MAGIC_CODE != magicCode) {
+            _SL_ASSERT(0);
+        }
+    }
+
+    return (int16_t)Msg.Rsp.status;
+}
+#endif
+#endif
+
+}//namespace
+
+