cc3200 hangs after sl_start

Hi Shatuddha,

Could you clarify the following:

1. Are you using the OS or non-OS mode?

2. Is sl_start returning with an error? Could you share the error code?

Best regards,

Naveen

Hi Naveen,

I'm using Non-Os mode. My board is Rev 4.1 and I'm using latest service pack. 

sl_start returns with 0. but the very next command after this hangs if wlanevent has occured. 

Here is my configuresimplelinktodefault function

int WiFiClass::configureSimpleLinkToDefaultState()
{
_WlanRxFilterOperationCommandBuff_t RxFilterIdMask = {0};

unsigned char val = 1;
unsigned char configOpt = 0;
unsigned char power = 0;

int retVal = -1;
int mode = -1;
int count = 0;

WiFiClass::ipAcquired = false;
Serial.println("Calling sl_start");
mode = sl_Start(0, 0, 0);
Serial.println("returned after sl_start");

/* If the device is not in station-mode, try configuring it in station-mode */
if (ROLE_STA != mode)
{
if (ROLE_AP == mode)
{
/* If the device is in AP mode, we need to wait for this event before doing anything */
while(!WiFiClass::ipAcquired) { _SlNonOsMainLoopTask(); }
}
/* Switch to STA role and restart */
retVal = sl_WlanSetMode(ROLE_STA);
retVal = sl_Stop(0);
retVal = sl_Start(0, 0, 0);

/* 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 */
configureSimpleLinkToDefaultState();
}
}
Serial.println("new role is STA");
WiFiClass::role = ROLE_STA;

retVal = sl_WlanDisconnect();
Serial.println("Returned from WlanDisconnect");

if(0 == retVal)
{
while(WiFi.status() == WL_CONNECTED)
{
_SlNonOsMainLoopTask();
retVal = sl_WlanDisconnect();
}
}

Serial.println("Previous connections removed");
/* Enable DHCP client*/
retVal = sl_NetCfgSet(SL_IPV4_STA_P2P_CL_DHCP_ENABLE,1,1,&val);

/* Disable scan */
configOpt = SL_SCAN_POLICY(0);
retVal = sl_WlanPolicySet(SL_POLICY_SCAN , configOpt, NULL, 0);

/* Set Tx power level for station mode
Number between 0-15, as dB offset from max power - 0 will set maximum power */
power = 0;
retVal = sl_WlanSet(SL_WLAN_CFG_GENERAL_PARAM_ID, WLAN_GENERAL_PARAM_OPT_STA_TX_POWER, 1, (unsigned char *)&power);

//Serial.println("setting wlan policy");
/* Set PM policy to normal */
retVal = sl_WlanPolicySet(SL_POLICY_PM , SL_NORMAL_POLICY, NULL, 0);

/* Unregister mDNS services */
retVal = sl_NetAppMDNSUnRegisterService(0, 0);

/* Remove all 64 filters (8*8) */
pal_Memset(RxFilterIdMask.FilterIdMask, 0xFF, 8);
retVal = sl_WlanRxFilterSet(SL_REMOVE_RX_FILTER, (unsigned char *)&RxFilterIdMask,
sizeof(_WlanRxFilterOperationCommandBuff_t));

retVal = sl_Stop(0x10);
Serial.println("Returned from sl_Stop");

delay(50);

Serial.println("Calling sl_start");
mode = sl_Start(0, 0, 0);
Serial.println("Returned from sl_start");

retVal = sl_WlanPolicySet(SL_POLICY_CONNECTION, SL_CONNECTION_POLICY(1, 0, 0, 0, 0), NULL, 0);
Serial.println("Returned from sl_Wlanpolicyset");

count = 0;
while (((WiFi.status() != WL_CONNECTED) || (!ipAcquired))&&(count++ < 30) )
{
_SlNonOsMainLoopTask();
Serial.print(".");
delay(200);
}
Serial.println();
if(count >= 30)
{
Serial.println("Fast connection failed");
}
else
{
Serial.println("Fast connection succeeds");
}
return retVal;
}

As can be seen from log, device always hangs whenever wlanevant has occured at around sl_start.

Hi Shatuddha,

Apologies for delayed response.

From the code I couldn't find how are you ACK-ing the watchdog. CC3200 Watchdog requires to be acknowledged at-least once in the configured timeout period else it would reset the device

What is the watchdog timeout period. Can you increase the timeout and try ?


Thanks and Regards,
Praveen

Hi Praveen,
Here is my watchdog implementation code

long WDTReloadVal = 80000000*5;
void WDTInit()
{
MAP_PRCMPeripheralClkEnable(PRCM_WDT,PRCM_RUN_MODE_CLK);

MAP_WatchdogUnlock(WDT_BASE);
MAP_WatchdogReloadSet(WDT_BASE,WDTReloadVal);
MAP_WatchdogEnable(WDT_BASE);

if(PRCMSysResetCauseGet() == PRCM_WDT_RESET)
{
Serial.println("Rebooting");
WiFi_OTA.RebootMCU();
}
}

static void WatchdogAck()
{
WatchdogIntClear(WDT_BASE);
}

So right now Watchdog is set to 5 seconds. Which I think is fairly large amount to time to process. But anyways I tried 10-15 seconds as well. It just halts and doesn't come back.

should I be calling _SlNonOsMainLoopTask(); after each step?/ will that be of any help?

Well, I tried calling _SlNonOsMainLoopTask(); at each step, that doesn't improve the situation.

Hi Shatuddha,

Regarding the WDT reset sequence that you are following, may I suggest you update it to the sequence prescribed in the section on "MCU Watch Dog Controller Usage Caveats" in the TRM (http://processors.wiki.ti.com/index.php/CC32xx_Technical_Reference_Manual).

There is also an example in the SDK (cc3200-sdk\example\watchdog_system_demo) showcasing the sequence.

Best regards,

Naveen

Hey Praveen,
I'm following the same sdk example that you mentioned. Moreover, watchdog is not the cause at all. It has been working like charm.
My issue is wlan_event happening around sl_start, which causes execution to hang.

Hi Shatuddha,

The reason for my suggesting following the watchdog sequence mentioned in the TRM is the following:

The WDT reset does not reset the WLAN domain (MAC and Baseband). In order to completely reset the system (APPs + networking engine), the sequence described in the TRM/example will need to be followed.

A clean reset of the system may ensure that the subsequent sl_start (being a network enable) goes through.

Best regards,

Naveen

ok, I was unaware of that.
Let me try and get back to you.

Hi Naveen,
I'm doing the PRCM reset as well. If you look at the log above,
"
//***********************************************//
Attempting to connect to stored network
Rebooting
//***********************************************//
Attempting to connect to stored network
"
Here "Attempting to connect to stored network " is printed first time by WDT reset and than "Rebooting" is when I check if reset cause was WDT and do PRCM reset.

you can see the code in WDTInit()
"
if(PRCMSysResetCauseGet() == PRCM_WDT_RESET)
{
Serial.println("Rebooting");
WiFi_OTA.RebootMCU();
}
"

Here WiFi_OTA.RebootMCU() is defined as

void WiFiOTA::RebootMCU()
{

// Configure hibernate RTC wakeup
PRCMHibernateWakeupSourceEnable(PRCM_HIB_SLOW_CLK_CTR);

// Delay loop
delay(100);

// Set wake up time
PRCMHibernateIntervalSet(330);

// Request hibernate
PRCMHibernateEnter();

// Control should never reach here
while(1)
{

}
}

Am I missing something?

Hi Shatuddha,

Your sequence looks ok. Do subsequent sl_start also fail after the reboot?

Best regards,

Naveen

 

Hi Shatuddha,
Sorry I think I misinterpreted your statement. You meant that you were already doing the right sequence and the log corresponds to the result with this sequence.
Best regards,Naveen

Yeah Right,

But this problem still persists with no solution or workaround so far. 

Please keep me updated if you come across any solution

Hi , Me also facing the Same Issue , what is the solution or woork around for it

Hello ,

I also experience the same problem using TCP demo in server mode where I added only LEDs from the blink demo.
Device was working fine for number of times, but it stucks on the same problem.

Patrick

HI,
I have the same problem too.
I have tried to set sl_WlanPolicySet to (0, 0, 0, 0, 0) so it doesn´t reconnect during start, but it doesn´t work.

Adolfo.