LPC1756的CAN总线问题

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wksljx|

楼主 | 2011-11-30 20:09 | 只看该作者回帖奖励

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CAN总线, LPC, AC, fm, se

  旁路模式可以收到，ACCF_ON模式下不可以收到，请问是什么原因，要怎么设置，设置的程序下：
/* Acceptance filter mode in AFMR register */
#define ACCF_OFF 0x01
#define ACCF_BYPASS 0x02
#define ACCF_ON    0x00
#define ACCF_FULLCAN 0x04
void CAN_SetACCF( uint32_t ACCFMode )
{
  switch ( ACCFMode )
  {
case ACCF_OFF:
LPC_CANAF->AFMR = ACCFMode;
LPC_CAN1->MOD = LPC_CAN2->MOD = 1; // Reset CAN
LPC_CAN1->IER = LPC_CAN2->IER = 0; // Disable Receive Interrupt
LPC_CAN1->GSR = LPC_CAN2->GSR = 0; // Reset error counter when CANxMOD is in reset
break;
case ACCF_BYPASS:
LPC_CANAF->AFMR = ACCFMode;
break;
case ACCF_ON:
case ACCF_FULLCAN:
LPC_CANAF->AFMR = ACCF_OFF;
CAN_SetACCF_Lookup();
LPC_CANAF->AFMR = ACCFMode;
break;
default:
break;
  }
  return;
}

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