Kinetis MicrocontrollersのトピックRe: TWR-k60 default Handler

TWR-k60 default Handler

ivanrobles — Thu, 25 Jul 2013 18:28:46 GMT

I'm trying to debug my code step by step about CAN. I have my main.c as:

int main(void)

{

uint32 MBRxID = 0x659; //Mail box RX ID

uint32 MBTxID = 0x82; //Mail box TX ID

uint08 BytesReceived = 0; //Bytes read from CAN bus

uint32 GetID;

uint16 BaudRate = 1000; //1 Mbit/s

uint32 Data0Received = 0; //Data read from MB

uint32 Data1Received = 0; //Data read from MB

uint32 Data0Send = 0x12345678; //Data that will be sent

uint32 Data1Send = 0x98765432; //Data that will be sent

uint08 NumBytesTX = 8; //Number of bytes that will be sent

/* Init FlexCAN module, Clock, interrupts and GPIO*/

FlexCAN1Init();

/* Config the FlexCAN module and Baud rate */

FlexCAN1Config(BaudRate);

/* Prepare Mailbox to receive */

FlexCAN1PrepareMBRX(MBRxID, FLEXCAN_MB9, FLEXCAN_STD_DATA_FRAME, FLEXCAN_MB_asRX);

/* Prepare Mailbox to transmit */

FlexCAN1PrepareMBTX(MBTxID, Data0Send, Data1Send, FLEXCAN_MB8, FLEXCAN_STD_DATA_FRAME, FLEXCAN_MB_asTX,NumBytesTX);

for(;;)

{

FlexCAN1TransmitMB(FLEXCAN_MB8);

{

BytesReceived = FlexCAN1Receive(&GetID, Data0Received, Data1Received);

}while(!BytesReceived);

}

return 0;

}

When the debug enters in FlexCAN1Init(); function, it configure the clock and the port. After, the debug sends me to the function

void Default_Handler()

{

__asm("bkpt");

}

It inside in kinetis_sysinit.c and the code never exists of there, How do I fix it?

Re: TWR-k60 default Handler

Hui_Ma — Fri, 26 Jul 2013 15:37:19 GMT

Hi,

Please check if during FlexCAN1Init() function, it enabled the FlexCAN1 clock gate before the FlexCAN1 module related registers access.

You could enable FlexCAN1 clock gate with below code:

SIM_SCGC3 |= SIM_SCGC3_FLEXCAN1_MASK;

Freescale also provides FlexCAN example code, please check [can_loopback_node] example with below link:

KINETIS512_SC : Kinetis family example projects.

http://www.freescale.com/webapp/sps/site/prod_summary.jsp?code=K60_100&nodeId=01624698C9DE2DDDAF&fpsp=1&tab=Design_Tools_Tab

Wish it helps.

B.R.

Ma Hui

Re: TWR-k60 default Handler

Monica — Tue, 30 Jul 2013 19:41:14 GMT

Hello Ivan,

Have this suggestions been helpful? Please keep us posted, we'd like to know :smileywink:

Best,

Monica.

Re: TWR-k60 default Handler

egoodii — Tue, 30 Jul 2013 19:59:23 GMT

You might also benefit from a 'better' fault-handler, such as that I have gleaned from some Freescale projects and attached here. If the fault is a write-access, you will get 'imprecise' information, as writes are buffered. To force a precise capture of information (for debug, as this is a performance penalty) you can turn that off:

SCB_ACTLR |= SCB_ACTLR_DISDEFWBUF_MASK;

Note that this vector table is specific to a K20-100, and is only 'generally related' to a K60 table.

Re: TWR-k60 default Handler

ivanrobles — Wed, 31 Jul 2013 19:57:44 GMT

Hello Monica,

Yes I have. The issue was that the Clock for the PORTE wasn't set.

thank you so much!!! :smileywink: