CC3100MODBOOST: Host/CC3100 sync issues

Itay Cohen

Intellectual 585 points

Part Number: CC3100MODBOOST
Other Parts Discussed in Thread: MSP430F5529, CC3100MOD, CC3100, CC3200

Hi,

I'm working with the CC3100MOD Boost and the MSP430F5529 LP on custom HTTP server application.

After some time, when I increase power load of the system, I'm stuck on sync problem between the CC3100 and the MSP430.

I can see that I'm stuck in function _SlDrvRxHdrRead:

    /* scan for the sync pattern till found or timeout elapsed (if configured) */
    while (SearchSync && TimeoutState)
    {
    	/* scan till we get the real sync pattern */
		for (ShiftIdx =0; ShiftIdx <=4 ; ShiftIdx++)
		{
		   /* sync pattern found so complete the read to  4 bytes aligned */
		   if (N2H_SYNC_PATTERN_MATCH(&pBuf[ShiftIdx], g_pCB->TxSeqNum))
		   {
				   /* copy the bytes following the sync pattern to the buffer start */
				   *(_u32 *)&pBuf[0] = *(_u32 *)&pBuf[ShiftIdx + SYNC_PATTERN_LEN];

				  /* read the rest of the byte */
				  NWP_IF_READ_CHECK(g_pCB->FD, &pBuf[SYNC_PATTERN_LEN - ShiftIdx], ShiftIdx);

				  /* here we except to get the opcode + length or false doubled sync..*/
				  SearchSync = FALSE;
				  break;
		   }

		}

        if (SearchSync == TRUE)
		{
			/* sync not found move top 4 bytes to bottom */
			*(_u32 *)&pBuf[0] = *(_u32 *)&pBuf[4];

			/* read 4 more bytes to the buffer top */
			NWP_IF_READ_CHECK(g_pCB->FD, &pBuf[4], 4);
		}

Is there a simple way to re-sync between the CC3100 and the MSP430 (without initiate the connection process)?

Thanks,

Itay

over 8 years ago

0 Vincent Rodriguez over 8 years ago

TI__Mastermind 28285 points

Itay,

This looks similar to the below E2E question.

e2e.ti.com/.../540606

The only way to recover from this is to set a timeout on your sl commands. what command is running when you encounter this?

Regards,

Vince Rodriguez

0 Itay Cohen over 8 years ago in reply to Vincent Rodriguez

Intellectual 585 points

Hi Vincent,

I do not know which commend the protocol issue before it get stuck.
I'm stuck inside the while loop above. It happened after some time during increasing my system current consumption (increasing 3 phase BLDC motor speed). I guess that there is a momentary noise on the SPI lines or IRQ line.
I understand that I need to implement a timeout for the SYNC search mechanism.

How should I define the sl_GetTimestamp in order to implement timeout?

Thanks,

Itay

0 Vincent Rodriguez over 8 years ago in reply to Itay Cohen

TI__Mastermind 28285 points

Itay,

Can we isolate that noise on the system? Can we measure what noise you are seeing on the VBAT_CC lines?

If this happens when you are increasing load on your system, you could also check and make sure that the voltage is not dropping during this.

for implementing sl_getTimestamp, what version of the SDK are you using?

Thanks,

Vince Rodriguez

0 Itay Cohen over 8 years ago in reply to Vincent Rodriguez

Intellectual 585 points

Hi Vincent,

I'm using an external LDO for the CC3100 and the MSP430. The 3.3v line is flat and steady.

I think that I use SDK v1.2.0. Is there a way to verify that?

Thanks,

Itay

0 Vincent Rodriguez over 8 years ago in reply to Itay Cohen

TI__Mastermind 28285 points

Yes,

If you navigate inside your project in Code Composer Studio and look inside your includes, some of your includes will be part of the sdk. The sdk version will be part of the file path name.

Regards,

Vince Rodriguez

0 Itay Cohen over 8 years ago in reply to Vincent Rodriguez

Intellectual 585 points

OK.
It's 1.2.0.
In that case, how should I implement the timeout option (sl_getTimestamp)?

Thanks.

0 Itay Cohen over 8 years ago in reply to Vincent Rodriguez

Intellectual 585 points

Hi Vincent,

Can you assist regarding implementation of sl_getTimestamp?

Thanks,

Itay

0 Vincent Rodriguez over 8 years ago in reply to Itay Cohen

TI__Mastermind 28285 points

Itay,

Can you try to move to the newer SDK? Looking back at it, i don't think implementing the timestamp is going to help.

We need to figure out in what case is this happening in. If you debug, should be able to back track and find out what function was called that created this error.

I believe if you move to the newer SDK, the timeouts should be have been added and if you fail to sync, you will return with a error message.

Regards,

Vince Rodriguez

0 Itay Cohen over 8 years ago in reply to Vincent Rodriguez

Intellectual 585 points

Hi Vincent,

As far as I know, SDK V1.2.0 is the latest version for the CC3100. Is there a newer version?

Is there a simple way to do a back track to the function which call the function _SlDrvRxHdrRead(_u8 *pBuf, _u8 *pAlignSize)?

When the system stuck, it stuck on the while loop above at:

        if (SearchSync == TRUE)
		{
			/* sync not found move top 4 bytes to bottom */
			*(_u32 *)&pBuf[0] = *(_u32 *)&pBuf[4];

			/* read 4 more bytes to the buffer top */
			NWP_IF_READ_CHECK(g_pCB->FD, &pBuf[4], 4);
		}

Thanks,

Itay

0 Benjamin Moore over 8 years ago in reply to Itay Cohen

TI__Mastermind 31055 points

Hi Itay,

Yes, SDK v1.2 is the latest for CC3100. Please make sure you have updated to the latest ServicePack (v1.0.1.11-2.9.0.0).

The sl_getTimestamp() examples for CC3100 will be added for the next SDK release. Until then, you can take a look at how this is done in the CC3200 SDK (refer to TimerGetCurrentTimestamp() at the bottom of cc_pal.c in the simplelink folder).

If you are using CCS, you should be able to set a breakpoint in the host driver at this location and see the function call trace in the Debug window. Here is an example with the CC3200 (should be applicable to MSP host) -

Best Regards,

Ben M

0 Vincent Rodriguez over 8 years ago in reply to Benjamin Moore

TI__Mastermind 28285 points

Itay,

I'm going to close this thread. Please open a new thread if you have any more questions.

Regards,

Vince Rodriguez

Wi-Fi

Wi-Fi forum

CC3100MODBOOST: Host/CC3100 sync issues