TMDSIDK437X: SNTP socket creation error

Gentle reminder..

I reliazed the problem occurs when 

SLNETSOCK_LOCK is getting called.

Kindly suggest.

Regards,

Vrund

Hi Vrund,

What was the behavior of the program (or symptom of the problem) when SLNETSOCK_LOCK was called? Was the program just hanging?

Please note that SLNETSOCK_LOCK() is defined as sem_wait() which waits for semaphore VirtualSocketSem to be available. The semaphore needs to be first initialized. Did your program call SlNetSock_init() which initializes that semaphore?

Thanks,

Jianzhong

Hello,

1) Behavior of the program: hang

2) First of all below are the definition i found in package.(SLNETSOCK_LOCK())

#define SLNETSOCK_LOCK() pthread_mutex_lock(&VirtualSocketMutex) // forever
#define SLNETSOCK_UNLOCK() pthread_mutex_unlock(&VirtualSocketMutex)

3) I have tried with  SlNetSock_init()  also behavior is same.

If i use sem_wait() which header file i need to include? I am working on windows platform and using TI RTOS.

config script snapshot.

var Clock = xdc.useModule('ti.sysbios.knl.Clock');
var Swi = xdc.useModule('ti.sysbios.knl.Swi');
var Task = xdc.useModule('ti.sysbios.knl.Task');
var Mailbox = xdc.useModule('ti.sysbios.knl.Mailbox');
var Semaphore = xdc.useModule('ti.sysbios.knl.Semaphore');
var Hwi = xdc.useModule('ti.sysbios.hal.Hwi');
var Timer = xdc.useModule('ti.sysbios.hal.Timer');
var SemihostSupport = xdc.useModule('ti.sysbios.rts.gnu.SemiHostSupport');

Regards,

Vrund

Hi Vrund,

My apology. I was looking at a different version of Network Services. In ns_2_60_01_06, SLNETSOCK_LOCK() is defined as pthread_mutex_lock(), not sem_wait(). 

You probably have read the NS User's Guide at: ns_2_60_01_06/docs/ns/NS_Users_Guide.html, but I just wanted to point out that following text from section 2.2 Usage is important to follow:

To use the SlNetSock APIs, the application should include its header file as follows:

#include <ti/net/slnetsock.h>
#include <ti/net/slnetif.h>
#include <ti/net/slnetutils.h>

At runtime, users must initialize any modules they use:

    SlNetSock_init(0);
    SlNetIf_init(0);
    SlNetUtil_init(0);

Users must also register at least one SlNetIf “interface” that will provide SlNetSock services:

/* To add the NDK network stack */
#include <ti/ndk/slnetif/slnetifndk.h>

    status = SlNetIf_add(SLNETIF_ID_2, ifName,
            (const SlNetIf_Config_t *)&SlNetIfConfigNDK, ndkPri);

For more details, including example code, see the SlNetSock API Reference Guide.

Regards,

Jianzhong

Hello,

As suggested, i have added code as below.

header file included: #include <ti/ndk/slnetif/slnetifndk.h>

void SNTP_Update(void)
{


#if 0
    HANDLE      hCfgIpAddr;
    while(1){

        /*get the current static IP entry */
        CfgGetEntry(0, CFGTAG_IPNET, 1, 0, &hCfgIpAddr);
        /* Sleep to yield */
        Task_sleep(16000);
    }
Task_exit();

#else
    int32_t  retVal;
    uint32_t seconds;
    uint32_t secondsFraction;
    SlNetSock_Timeval_t timeval;
    uint64_t ntpTimeStamp = 0;
    SlNetSock_AddrIn_t ipv4addr;

    uint32_t addr = 0xc800a8c0;
    //uint32_t addr = 0xc0a880c8;

    ipv4addr.sin_family = SLNETSOCK_AF_INET;
    ipv4addr.sin_port = SlNetUtil_htons(123/*SNTP_PORT*/);
    ipv4addr.sin_addr.s_addr = inet_addr("192.168.0.200");
    timeval.tv_sec  = 5;
    timeval.tv_usec = 0;

    uint8_t ndkPri = 1;
    int32_t status = 0;

    SlNetSock_init(0);
    SlNetIf_init(0);
    SlNetUtil_init(0);

    status = SlNetIf_add(SLNETIF_ID_2, "eth0",
                (const SlNetIf_Config_t *)&SlNetIfConfigNDK, ndkPri);
    while(1) {

            retVal = SNTP_getTimeByAddr((SlNetSock_Addr_t *)&ipv4addr, &timeval,
                  &ntpTimeStamp);

            if (retVal == 0) {
                // The seconds value is stored in the upper 32 bits
                seconds = (0xFFFFFFFF00000000 & ntpTimeStamp) >> 32;
                // The seconds fraction is stored in the lower 32 bits
                secondsFraction = ntpTimeStamp;
            }



        /* Sleep to yield */
        Task_sleep(16000);
    }
    Task_exit();
#endif
}

 slnet files as well as library are also added from ns package to the project and to linker directory.

C:\ti\ns_2_60_01_06\source\ti\net

C:\ti\ns_2_60_01_06\source\ti\net\lib\gcc\a9fg : release.a

as well sntp related files and library are also to the project and to linker directory.

Apart from this Below are the files added from NDK package.(C:\ti\ndk_3_61_01_01\packages\ti\ndk\slnetif)

slnetifndk.c, slnetifndk.h, slnetifndk_internal.h

Compiler not able to locate header file (#include <semaphore.h>)from file slnetifndk.c

As i informed i am using sys bios rtos

var Defaults = xdc.useModule('xdc.runtime.Defaults');
var Diags = xdc.useModule('xdc.runtime.Diags');
var Error = xdc.useModule('xdc.runtime.Error');
var Main = xdc.useModule('xdc.runtime.Main');
var System = xdc.useModule('xdc.runtime.System');
var Text = xdc.useModule('xdc.runtime.Text');
var Clock = xdc.useModule('ti.sysbios.knl.Clock');
var Swi = xdc.useModule('ti.sysbios.knl.Swi');
var Task = xdc.useModule('ti.sysbios.knl.Task');
var Mailbox = xdc.useModule('ti.sysbios.knl.Mailbox');
var Semaphore = xdc.useModule('ti.sysbios.knl.Semaphore');
var Hwi = xdc.useModule('ti.sysbios.hal.Hwi');
var Timer = xdc.useModule('ti.sysbios.hal.Timer');
var SemihostSupport = xdc.useModule('ti.sysbios.rts.gnu.SemiHostSupport');

My understanding is that for semaphore.h needs to be located under posix (C:\ti\bios_6_76_03_01\packages\ti\posix\gcc)

But I am not using posix RTOS. How to proceed further.

Kindly guide.

Regards,

Vrund

Hi Vrund,

Please try to use the pre-built NDK library from ndk_3_61_01_01\packages\ti\ndk\slnetif\lib instead of adding slnetifndk.c to your project.

Thanks,

Jianzhong

Hello,

Added and project is getting build.

But i am not able to add interface as it is getting failed at 

 /* Check if all required configuration exists                            */
    retVal = SlNetIf_configCheck(ifConf);

    /* Check retVal in order to continue with adding the interface           */
    if (SLNETERR_RET_CODE_OK == retVal)
    {

It is not going in if case.

can you provide any example code how to add interface.

below is my code.

void SNTP_Update(void)
{
#if 1

    int32_t  retVal;
    uint32_t seconds;
    uint32_t secondsFraction;
    SlNetSock_Timeval_t timeval;
    uint64_t ntpTimeStamp = 0;
    SlNetSock_AddrIn_t ipv4addr;

    uint32_t addr = 0xc800a8c0;
    //uint32_t addr = 0xc0a880c8;

    ipv4addr.sin_family = SLNETSOCK_AF_INET;
    ipv4addr.sin_port = SlNetUtil_htons(123/*SNTP_PORT*/);
    ipv4addr.sin_addr.s_addr = inet_addr("192.168.0.200");
    timeval.tv_sec  = 5;
    timeval.tv_usec = 0;

    uint8_t ndkPri = 1;
    int32_t status = 0;
    SlNetIf_Config_t SlNetIfConfigNDK;

    SlNetSock_init(0);
    SlNetIf_init(0);
    SlNetUtil_init(0);

    status = SlNetIf_add(SLNETIF_ID_2, "eth0",
                (const SlNetIf_Config_t *)&SlNetIfConfigNDK, ndkPri);
    while(1) {

            retVal = SNTP_getTimeByAddr((SlNetSock_Addr_t *)&ipv4addr, &timeval,
                  &ntpTimeStamp);

            if (retVal == 0) {
                // The seconds value is stored in the upper 32 bits
                seconds = (0xFFFFFFFF00000000 & ntpTimeStamp) >> 32;
                // The seconds fraction is stored in the lower 32 bits
                secondsFraction = ntpTimeStamp;
            }



        /* Sleep to yield */
        Task_sleep(16000);
    }
    Task_exit();
#endif
}

Regards,

Vrund

Hi Vrund,

Your data structure "SlNetIfConfigNDK" is not populated and that's why SlNetIf_configCheck() returns error. Please refer to ns_2_60_01_06\source\ti\net\slnetif.h for the mandatory configurations.

Thanks,

Jianzhong

Hi Vrund,

I looked at SNTP_getTimeByAddr() a little more. This function depends on SlNetSock module and SlNetUtils module. So you don't have to call SlNetIf_init() or SlNetIf_add(). Can you try just adding the following into your application:

    SlNetSock_init(0);
    SlNetUtil_init(0);

Thanks,

Jianzhong

Hi,

 I have tried that option but not working.

There are couple of points i would like to draw your attention.

1) Below is the function SlNetUtil_init is it ok? i havent seen any initialization into this.

int32_t SlNetUtil_init(int32_t flags)
{
    return 0;
}

2) During debugging till  SLNETSOCK_LOCK(); code works fine under function SlNetSock_AllocVirtualSocket().

after  SLNETSOCK_LOCK(); it comes to function

acquireMutexNone() 

static int acquireMutexNone(pthread_mutex_obj *mutex, UInt32 timeout)
{
    UInt               key;
    pthread_Obj       *thisThread;

    thisThread = (pthread_Obj *)pthread_self();

    /* Return if the thread already owns the mutex */
    if (mutex->owner == thisThread) {
        if (mutex->type == PTHREAD_MUTEX_ERRORCHECK) {
            return (EDEADLK);
        }
        if (mutex->type == PTHREAD_MUTEX_RECURSIVE) {
            mutex->lockCnt++;
            return (0);
        }

        /*
         *  If we get here, the mutex type is PTHREAD_MUTEX_NORMAL, so
         *  deadlock will occur (with an infinite timeout).
         */
        Assert_isTrue(mutex->type != PTHREAD_MUTEX_NORMAL, 0);
    }

after Assert_isTrue(mutex->type != PTHREAD_MUTEX_NORMAL, 0);

it raies the error. IN console window "CortexA9: Unhandled ADP_Stopped exception 0x803C7078"

and "

Can't find a source file at "/db/ztree/library/trees/newlib/newlib-a00/src/linaro/gcc-arm-none-eabi-7-2017-q4-major/src/newlib/libgloss/arm/swi.h"
Locate the file or edit the source lookup path to include its location. " under source file window.

Void Assert_raise(Types_ModuleId mod, CString file, Int line, Assert_Id id)
{
    String sep = (id != 0U) ? ": " : "";
    CString msg = (id != 0U && Text_isLoaded == TRUE) ?
        Text_ropeText((Text_RopeId)(id >> 16)) : "";

    Error_raiseX(NULL, mod, file, line,
        Assert_E_assertFailed, (IArg)sep, (IArg)msg);
}

After that it goes to exit function.

void _exit(int code) 
{
    asm(" .global C$$EXIT");
    asm("C$$EXIT:");
    while(1){};
}
/*
 *  @(#) gnu.targets.arm.rtsv7A; 1, 0, 0,; 9-13-2019 11:37:42; /db/ztree/library/trees/xdctargets/xdctargets-t09/src/ xlibrary

 */

Regards,

Vrund

Hi Vrund,

Regarding your questions:

1) Below is the function SlNetUtil_init is it ok? i havent seen any initialization into this.

That's fine. This just means SlNetUtil module don't need initialization in this release.

2) During debugging till  SLNETSOCK_LOCK(); code works fine under function SlNetSock_AllocVirtualSocket().

Let me clarify. Before you added SlNetSock_init(), your program was hanging in SLNETSOCK_LOCK(), and now it didn't hang but failed on that assertion. Is this right? 

The code you were looking at, acquireMutexNone(), is from TI SYS/BIOS. I wouldn't recommend you to debug that code. 

I'm reaching out to development teams to see if we can provide some example code of using SlNetSock API. Before then, I would recommend to read the NS User's Guide and API Reference Guide to understand the proper usage of the API.

Thank you for your patience.

Regards,

Jianzhong

Hello Jianzhong,

The code you were looking at, acquireMutexNone(), is from TI SYS/BIOS. I wouldn't recommend you to debug that code. 

--- I am not debugging the TI SYS/BIOS code. I am just trying to understand where exactly the

problem is so that i can convey to you to help solve the problem fast. 

Let me clarify. Before you added SlNetSock_init(), your program was hanging in SLNETSOCK_LOCK(), and now it didn't hang but failed on that assertion. Is this right? 

---Initially also (before addition of SlNetSock_init()) program goes to acquireMutexNone(),  stage.

I'm reaching out to development teams to see if we can provide some example code of using SlNetSock API. Before then, I would recommend to read the NS User's Guide and API Reference Guide to understand the proper usage of the API.

-- is there any other way for implementing SNTP without usage of SlNetSock API??

kindly guide.

Regards,

Vrund

Vrund,

The SNTP module in Network Services is implemented on top of SlNetSock module. We don't have any other way of implementing SNTP. 

Thanks,

Jianzhong

Gentle reminder..

Kindly address the issue.

 have tried that option but not working.

There are couple of points i would like to draw your attention.

1) Below is the function SlNetUtil_init is it ok? i havent seen any initialization into this.

2) During debugging till  SLNETSOCK_LOCK(); code works fine under function SlNetSock_AllocVirtualSocket().

after  SLNETSOCK_LOCK(); it comes to function

after Assert_isTrue(mutex->type != PTHREAD_MUTEX_NORMAL, 0);

it raies the error. IN console window "CortexA9: Unhandled ADP_Stopped exception 0x803C7078"

and "

Can't find a source file at "/db/ztree/library/trees/newlib/newlib-a00/src/linaro/gcc-arm-none-eabi-7-2017-q4-major/src/newlib/libgloss/arm/swi.h"
Locate the file or edit the source lookup path to include its location. " under source file window.

After that it goes to exit function.

Regards,

Hi Vrund,

1)  SlNetUtil_init() is fine. It has nothing to initialize in this release. We may add new features in future and this function may become non-empty, but API will remain the same.

2) I'm aware of the problem within SLNETSOCK_LOCK() and am reaching out to internal developers for help. I'll try to get back to you as soon as possible.

Thanks for your patience.

Regards,

Jianzhong

P.S. I will be out from December 24 to January 3 and won't be able to respond to your posts during this period of time.