Posted on November 11, 2008 at 23:49I hava designed a product with str710,but the can always crashed. Baud rate is 100K ,about 2 hours start error. It can send ok,but the other mcu dosn't received. I use the ST firmware. It is
u32 CAN_SendMessage(u32 msgobj, canmsg* pCanMsg)
{
while (CAN->sMsgObj[0].CRR & CAN_CRR_BUSY);
/* if (CAN->sMsgObj[0].COMR & CAN_CRQ_BUSY) */
/* return 0; // message interface 0 not free */
CAN->SR &= ~CAN_SR_TXOK;
/* read the Arbitration and Message Control */
CAN->sMsgObj[0].CMR = CAN_CMR_ARB | CAN_CMR_CONTROL;
CAN->sMsgObj[0].CRR = 1 + msgobj;
while (CAN->sMsgObj[0].CRR & CAN_CRR_BUSY);
/* update the contents needed for transmission */
CAN->sMsgObj[0].CMR = CAN_CMR_WRRD
| CAN_CMR_ARB
| CAN_CMR_CONTROL
| CAN_CMR_DATAA
| CAN_CMR_DATAB;
if ((CAN->sMsgObj[0].A2R & CAN_A2R_XTD) == 0)
{
/* standard ID */
CAN->sMsgObj[0].A1R = 0;
CAN->sMsgObj[0].A2R = (CAN->sMsgObj[0].A2R & 0xE000) | STD_FIXED_ID_ARB(pCanMsg->Id);
}
else
{
// extended ID
CAN->sMsgObj[0].A1R = EXT_FIXED_ID_ARB_L(pCanMsg->Id);
CAN->sMsgObj[0].A2R = (CAN->sMsgObj[0].A2R & 0xE000) | EXT_FIXED_ID_ARB_H(pCanMsg->Id);
}
CAN->sMsgObj[0].MCR = (CAN->sMsgObj[0].MCR & 0xFEF0) | CAN_MCR_NEWDAT | CAN_MCR_TXRQST | pCanMsg->Dlc;
CAN->sMsgObj[0].DA1R = ((u16)pCanMsg->Data[1]<Data[0];
CAN->sMsgObj[0].DA2R = ((u16)pCanMsg->Data[3]<Data[2];
CAN->sMsgObj[0].DB1R = ((u16)pCanMsg->Data[5]<Data[4];
CAN->sMsgObj[0].DB2R = ((u16)pCanMsg->Data[7]<Data[6];
CAN->sMsgObj[0].CRR = 1 + msgobj;
////////////////////////
CAN_SetRxMsgObj(CAN_RX_MSGOBJ, CAN_STD_ID, 0, CAN_LAST_STD_ID, TRUE);
//////////////////////
return 1;
}
Please help me!
