标题:
2812 Can发送邮箱无法置为自动应答模式
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作者:
reporter
时间:
2013-9-6 11:23
标题:
2812 Can发送邮箱无法置为自动应答模式
  我的发送邮箱初始化程序如下，目的是初始化MB1为发送邮箱（自动应答），当接收到远程帧时自动发送具有相同标识符的数据帧到Can总线。
  查了很多资料，貌似只要 MD=0，RTR=0，AAM=1，就可以将邮箱设置为自动应答模式，但是调试了几天没成功，发帖请教，请论坛里的朋友们多多指教，在此感激不尽！
void
InitECan(void)
{
  struct ECAN_REGS ECanaShadow;
  //配置GPIO引脚工作在eCAN功能
  EALLOW;
  GpioMuxRegs.GPFMUX.bit.CANRXA_GPIOF7=1;
  GpioMuxRegs.GPFMUX.bit.CANTXA_GPIOF6=1;
  //配置eCAN的RX和TX分别为eCAN的接收和发送引脚
  ECanaShadow.CANTIOC.all = ECanaRegs.CANTIOC.all;
  ECanaShadow.CANTIOC.bit.TXFUNC = 1;
  ECanaRegs.CANTIOC.all = ECanaShadow.CANTIOC.all;
  ECanaShadow.CANRIOC.all = ECanaRegs.CANRIOC.all;
  ECanaShadow.CANRIOC.bit.RXFUNC = 1;
  ECanaRegs.CANRIOC.all = ECanaShadow.CANRIOC.all;
  EDIS;
  EALLOW;
  ECanaShadow.CANMC.all = ECanaRegs.CANMC.all;
  //工作在非测试模式
  ECanaShadow.CANMC.bit.STM = 0;
  //工作在ecan模式
  ECanaShadow.CANMC.bit.SCB = 1;
  ECanaShadow.CANMC.bit.DBO = 1;
  ECanaShadow.CANMC.bit.ABO = 1;
  ECanaRegs.CANMC.all = ECanaShadow.CANMC.all;
  EDIS;
  ECanaMboxes.MBOX0.MSGCTRL.all = 0x00000000;
  ECanaMboxes.MBOX1.MSGCTRL.all = 0x00000000;
  ECanaMboxes.MBOX2.MSGCTRL.all = 0x00000000;
  ECanaMboxes.MBOX3.MSGCTRL.all = 0x00000000;
  ECanaMboxes.MBOX4.MSGCTRL.all = 0x00000000;
  ECanaMboxes.MBOX5.MSGCTRL.all = 0x00000000;
  ECanaMboxes.MBOX6.MSGCTRL.all = 0x00000000;
  ECanaMboxes.MBOX7.MSGCTRL.all = 0x00000000;
  ECanaMboxes.MBOX8.MSGCTRL.all = 0x00000000;
  ECanaMboxes.MBOX9.MSGCTRL.all = 0x00000000;
  ECanaMboxes.MBOX10.MSGCTRL.all = 0x00000000;  
  ECanaMboxes.MBOX11.MSGCTRL.all = 0x00000000;
  ECanaMboxes.MBOX12.MSGCTRL.all = 0x00000000;
  ECanaMboxes.MBOX13.MSGCTRL.all = 0x00000000;
  ECanaMboxes.MBOX14.MSGCTRL.all = 0x00000000;
  ECanaMboxes.MBOX15.MSGCTRL.all = 0x00000000;
  ECanaMboxes.MBOX16.MSGCTRL.all = 0x00000000;
  ECanaMboxes.MBOX17.MSGCTRL.all = 0x00000000;
  ECanaMboxes.MBOX18.MSGCTRL.all = 0x00000000;
  ECanaMboxes.MBOX19.MSGCTRL.all = 0x00000000;
  ECanaMboxes.MBOX20.MSGCTRL.all = 0x00000000;
  ECanaMboxes.MBOX21.MSGCTRL.all = 0x00000000;
  ECanaMboxes.MBOX22.MSGCTRL.all = 0x00000000;
  ECanaMboxes.MBOX23.MSGCTRL.all = 0x00000000;
  ECanaMboxes.MBOX24.MSGCTRL.all = 0x00000000;
  ECanaMboxes.MBOX25.MSGCTRL.all = 0x00000000;
  ECanaMboxes.MBOX26.MSGCTRL.all = 0x00000000;
  ECanaMboxes.MBOX27.MSGCTRL.all = 0x00000000;
  ECanaMboxes.MBOX28.MSGCTRL.all = 0x00000000;
  ECanaMboxes.MBOX29.MSGCTRL.all = 0x00000000;
  ECanaMboxes.MBOX30.MSGCTRL.all = 0x00000000;
  ECanaMboxes.MBOX31.MSGCTRL.all = 0x00000000;
  //清除所有的TA位
  ECanaRegs.CANTA.all = 0xFFFFFFFF;
  //清除所有的RMP位
  ECanaRegs.CANRMP.all = 0xFFFFFFFF;        
  //清除所有的中断标志位
  ECanaRegs.CANGIF0.all = 0xFFFFFFFF;
  ECanaRegs.CANGIF1.all = 0xFFFFFFFF;
  //配置时钟参数
  EALLOW;
  ECanaShadow.CANMC.all = ECanaRegs.CANMC.all;
  ECanaShadow.CANMC.bit.CCR = 1;
  ECanaRegs.CANMC.all = ECanaShadow.CANMC.all;
  EDIS;         
  do
  {
    ECanaShadow.CANES.all = ECanaRegs.CANES.all;
  }
  while(ECanaShadow.CANES.bit.CCE != 1);
  EALLOW;
  ECanaRegs.CANBTC.bit.SAM = 0;
  ECanaRegs.CANBTC.bit.BRPREG = 19;     //500K    90M
  ECanaRegs.CANBTC.bit.TSEG2REG = 2;
  ECanaRegs.CANBTC.bit.TSEG1REG = 4;  
  ECanaShadow.CANMC.all = ECanaRegs.CANMC.all;
  ECanaShadow.CANMC.bit.CCR = 0;
  ECanaRegs.CANMC.all = ECanaShadow.CANMC.all;
  EDIS;  
  do
  {
    ECanaShadow.CANES.all = ECanaRegs.CANES.all;
  }
  while(ECanaShadow.CANES.bit.CCE != 0);
}        
void
ECan_Send_MB_Init(void)
{
  ECanaShadow.CANME.all = ECanaRegs.CANME.all;        
  ECanaShadow.CANME.bit.ME1 = 0;
  ECanaRegs.CANME.all = ECanaShadow.CANME.all;
  ECanaShadow.CANMD.all = ECanaRegs.CANMD.all;
  ECanaShadow.CANMD.bit.MD1 = 0;
  ECanaRegs.CANMD.all = ECanaShadow.CANMD.all;   
  ECanaMboxes.MBOX1.MSGID.bit.AME = 0;
  ECanaMboxes.MBOX1.MSGID.bit.AAM = 1;
  ECanaMboxes.MBOX1.MSGID.bit.IDE = 0;
  ECanaMboxes.MBOX1.MSGID.bit.STDMSGID = 0x191;
  ECanaMboxes.MBOX1.MSGID.bit.EXTMSGID_L = 0;
  ECanaMboxes.MBOX1.MSGID.bit.EXTMSGID_H = 0;
  ECanaMboxes.MBOX1.MSGCTRL.bit.RTR = 0;
  ECanaMboxes.MBOX1.MSGCTRL.bit.DLC = 8;
  EALLOW;
  ECanaShadow.CANMC.all = ECanaRegs.CANMC.all;
  ECanaRegs.CANMC.bit.CDR = 1;
  ECanaRegs.CANMC.all = ECanaShadow.CANMC.all;
  EDIS;
  ECanaMboxes.MBOX1.MDL.byte.BYTE1 = 1;
  ECanaMboxes.MBOX1.MDL.byte.BYTE2 = 2;
  ECanaMboxes.MBOX1.MDL.byte.BYTE3 = 3;
  ECanaMboxes.MBOX1.MDL.byte.BYTE4 = 4;
  ECanaMboxes.MBOX1.MDH.byte.BYTE5 = 5;
  ECanaMboxes.MBOX1.MDH.byte.BYTE6 = 6;
  ECanaMboxes.MBOX1.MDH.byte.BYTE7 = 7;
  ECanaMboxes.MBOX1.MDH.byte.BYTE8 = 8;
  EALLOW;
  ECanaShadow.CANMC.all = ECanaRegs.CANMC.all;
  ECanaRegs.CANMC.bit.CDR = 0;
  ECanaRegs.CANMC.all = ECanaShadow.CANMC.all;
  EDIS;
  ECanaShadow.CANME.all = ECanaRegs.CANME.all;        
  ECanaShadow.CANME.bit.ME1 = 1;
  ECanaRegs.CANME.all = ECanaShadow.CANME.all;
}
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