pppInProc[0]: got 1355 bytes
[b]pppInProc[0]: Dropping bad fcs 0x63B8 proto=0x0021[/b]
pppDrop: pbuf len=500
pppInProc[0]: got 1405 bytes
pppInput[0]: ip in pbuf len=492
pppifOutput[0]: proto=0x0021
pppInProc[0]: got 1405 bytes
pppInput[0]: ip in pbuf len=492
pppifOutput[0]: proto=0x0021

volatile unsigned char stop = 0;
extern xQueueHandle queue_gprs_bytes;

u32_t sio_read(sio_fd_t fd, u8_t *data, u32_t len)
{
    unsigned long i = 0;
    while (xQueueReceive(queue_gprs_bytes, &data[i], 0) == pdTRUE )
    {
        i++;
        if (stop || (i == len) )
        {
            stop = 0;
            return i;
        }
    }
    return i;
}

u32_t sio_write(sio_fd_t fd, u8_t *data, u32_t len)
{
    for (unsigned long i = 0; i<len; i++)
    {
        while (    !USART_GetFlagStatus(USART_MODEM, USART_FLAG_TXE) );
        USART_SendData(USART_MODEM, data[i]);
    }
    return len;
}

void sio_read_abort(sio_fd_t fd)
{
    stop = 1;
}

    struct netbuf * in_buf;
    unsigned short k = 2;
    while (bytesleft)
    {
        if (in_buf = netconn_recv(conn))
        {
            // успешно приняли что то
            char * incoming_data;
            unsigned long buflen = netbuf_len(in_buf);

            if (incoming_data = (char *)pvPortMalloc(buflen))
            {
                {
                    char * data; u16_t len;
                    netbuf_data(in_buf, (void **)&data, &len);
                    printf_diagn("%d: %lX->%lX (%d:%d)\r\n\r\n", k, data, incoming_data, buflen, bytesleft-buflen );
                }
                netbuf_copy(in_buf, incoming_data, buflen);
                //file_write(file, buflen, (unsigned char *)incoming_data);
                vPortFree(incoming_data);
            }
            bytesleft -= buflen;
            netbuf_delete(in_buf);
            k++;
        }
        else
            bytesleft = 0;
    }

...
ppp_send_config[0]: outACCM=0 0 A 0
ppp_recv_config[0]: inACCM=0 0 A 0
link_established: 0
upap_lowerup: 0 s=0
IPCP: lowerup state 0 (LS_INITIAL) -> 2 (LS_CLOSED)
upap_authwithpeer: 0 user=beeline password=beeline s=1
...

#define LWIP_SOCKET    0
#define LWIP_ARP    0
#define lwipINTERFACE_STACK_SIZE        1000
#define lwipINTERFACE_TASK_PRIORITY        1
#define LWIP_SO_RCVTIMEO                1// это пробовал и 0 и 1

#define TCPIP_THREAD_PRIO             (tskIDLE_PRIORITY)
#define PPP_THREAD_PRIO        (tskIDLE_PRIORITY)

void get_rest_of_FW(unsigned long bytesleft, File * file)
{
    LED_RedBlink(10);
    struct netbuf * in_buf;
    unsigned short k = 2;
    while (bytesleft)
    {
        if (in_buf = netconn_recv(conn))
        {
            // успешно приняли что то
            char * incoming_data;
            unsigned long buflen = netbuf_len(in_buf);
            if (incoming_data = (char *)pvPortMalloc(buflen))
            {
                {
                    char * data; u16_t len;
                    netbuf_data(in_buf, (void **)&data, &len);
                    printf_diagn("%d: %lX->%lX (%d:%d)\r\n\r\n", k, data, incoming_data, buflen, bytesleft-buflen );
                }
                netbuf_copy(in_buf, incoming_data, buflen);
                if ( ((signed long)bytesleft - (signed long)buflen) < 0 ) //// заплатка
                    buflen = bytesleft;
                file_write(file, buflen, (unsigned char *)incoming_data);
                vPortFree(incoming_data);
            }
            else
            {
                LED_RedBlink(4);
            }

            bytesleft -= buflen;
            netbuf_delete(in_buf);
            k++;
        }
        else
        {
            //bytesleft = 0;
            netconn_write(conn, "#M#push\r\n", strlen("#M#push\r\n"), NETCONN_NOCOPY); // заплатка
        }
    }
    LED_RedBlink(0);
}