RTOS/AWR1642: MCAN will crash when Data Bit Rate=8MHz.

JuiYang Chi

Part Number: AWR1642

Tool/software: TI-RTOS

This is my Parameter and Bit rate for MCAN.

mcanCfgParams->fdMode = 0x1U;
mcanCfgParams->brsEnable = 0x1U;
mcanCfgParams->txpEnable = 0x0U;
mcanCfgParams->efbi = 0x0U;
mcanCfgParams->pxhddisable = 0x0U;
mcanCfgParams->darEnable = 0x0U;
mcanCfgParams->wkupReqEnable = 0x1U;
mcanCfgParams->autoWkupEnable = 0x1U;
mcanCfgParams->emulationEnable = 0x0U;
mcanCfgParams->emulationFAck = 0x0U;
mcanCfgParams->clkStopFAck = 0x0U;
mcanCfgParams->wdcPreload = 0x0U;
mcanCfgParams->tdcEnable = 0x1U;
mcanCfgParams->tdcConfig.tdcf = 0U;
mcanCfgParams->tdcConfig.tdco = 3U; //For 8Mhz
mcanCfgParams->monEnable = 0x0U;
mcanCfgParams->asmEnable = 0x0U;
mcanCfgParams->tsPrescalar = 0x0U;
mcanCfgParams->tsSelect = 0x0U;
mcanCfgParams->timeoutSelect = CANFD_MCANTimeOutSelect_CONT;
mcanCfgParams->timeoutPreload = 0x0U;
mcanCfgParams->timeoutCntEnable= 0x0U;
mcanCfgParams->filterConfig.rrfe = 0x1U;
mcanCfgParams->filterConfig.rrfs = 0x1U;
mcanCfgParams->filterConfig.anfe = 0x1U;
mcanCfgParams->filterConfig.anfs = 0x1U;
mcanCfgParams->msgRAMConfig.lss = 127U;
mcanCfgParams->msgRAMConfig.lse = 64U;
mcanCfgParams->msgRAMConfig.txBufNum = 32U;
mcanCfgParams->msgRAMConfig.txFIFOSize = 0U;
mcanCfgParams->msgRAMConfig.txBufMode = 0U;
mcanCfgParams->msgRAMConfig.txEventFIFOSize = 0U;
mcanCfgParams->msgRAMConfig.txEventFIFOWaterMark = 0U;
mcanCfgParams->msgRAMConfig.rxFIFO0size = 0U;
mcanCfgParams->msgRAMConfig.rxFIFO0OpMode = 0U;
mcanCfgParams->msgRAMConfig.rxFIFO0waterMark = 0U;
mcanCfgParams->msgRAMConfig.rxFIFO1size = 64U;
mcanCfgParams->msgRAMConfig.rxFIFO1waterMark = 64U;
mcanCfgParams->msgRAMConfig.rxFIFO1OpMode = 64U;
mcanCfgParams->eccConfig.enable = 1;
mcanCfgParams->eccConfig.enableChk = 1;
mcanCfgParams->eccConfig.enableRdModWr = 1;
mcanCfgParams->errInterruptEnable = 1U;
mcanCfgParams->dataInterruptEnable = 1U;
mcanCfgParams->appErrCallBack = MCANAppErrStatusCallback;
mcanCfgParams->appDataCallBack = MCANAppCallback;

mcanBitTimingParams.nomBrp = 0x2U;
mcanBitTimingParams.nomPropSeg = 0x8U;
mcanBitTimingParams.nomPseg1 = 0x6U;
mcanBitTimingParams.nomPseg2 = 0x5U;
mcanBitTimingParams.nomSjw = 0x1U;

mcanBitTimingParams.dataBrp = 0x1U;
mcanBitTimingParams.dataPropSeg = 0x2U;
mcanBitTimingParams.dataPseg1 = 0x1U;
mcanBitTimingParams.dataPseg2 = 0x1U;
mcanBitTimingParams.dataSjw = 0x1U;

It can run at the beginning. But it will error after a while.

This is the ErrorCode in CCSDebug.

This is my code for Transmit.

Thanks,

JuiYang .

over 7 years ago

0 Cesar over 7 years ago

TI__Guru**** 150544 points

Hi,

Is this working fine at lower rates?

Thank you
cesar

0 JuiYang Chi over 7 years ago in reply to Cesar

Intellectual 860 points

Hi,

It can work at 5MHz.But it will crash at 8MHz.
What paramters do we set error at 8MHz?

Thanks,
JuiYang

0 LeonardEllis over 7 years ago

TI__Guru 71526 points

6/29/18[LE]>unlock

0 Raghunandan Kamath over 7 years ago in reply to LeonardEllis

TI__Mastermind 22155 points

Hello JuiYang,

Sorry for the delayed reply. Do you still have this issue ?

From my understanding the error is due to the use of a single message object and message object being in use when transmitting the previous data.

Also can you please confirm if you are having single node on your CAN BUS or are there multiple nodes on your CANBUS and if the BUS is busy?

-Raghu

0 JuiYang Chi over 7 years ago in reply to Raghunandan Kamath

Intellectual 860 points

Hi Raghu,

I use a single node on my CAN BUS.(from AWR1642 to Computer)
How can I avoid the error for message object is occupied?

Thanks,
JuiYang

0 Raghunandan Kamath over 7 years ago in reply to JuiYang Chi

TI__Mastermind 22155 points

Hello JuiYang Chi,

You can have multiple message objects to transmit the data so that you do not have to wait for transmit complete in case of single message object.

Thanks,
Raghu

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RTOS/AWR1642: MCAN will crash when Data Bit Rate=8MHz.