DSP28335 CAN接收不到数据

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reporter发表于 2014-4-25 16:25 | 只看该作者

DSP28335 CAN接收不到数据

DSP28335 CAN接收不到另外一个CAN节点发送的数据，数据帧格式为：01 C0 11 22 33 44 55 66 77 88。01 C0为帧信息，后面的为数据。两个CAN节点的波特率均为500kbs，我配置的CAN接收为中断接收。我用另外一个CAN模块是可以收到发送CAN节点发送的数据的。不知道是不是我配置的CAN节点配置有误，还是数据被我屏蔽了。#include &quot;DSP2833x_Device.h&quot;&nbsp; &nbsp;&nbsp;&nbsp;// Headerfile Include File#include &quot;DSP2833x_GlobalPrototypes.h&quot;#include &quot;DSP2833x_SWPrioritizedIsrLevels.h&quot; #include &quot;DSP2833x_Project.h&quot;/** */interrupt void canb_receive_isr(void);Uint16 Send(void);Uint32 recData_L;Uint32 recData_H;void main(){&nbsp; &nbsp; &nbsp; &nbsp; struct ECAN_REGS ECanbShadow;// 1 初始化系统&nbsp; &nbsp; &nbsp; &nbsp; InitSysCtrl();&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; // 2 初始化引脚&nbsp; &nbsp; &nbsp; &nbsp; InitECanGpio();// 3 清除中断&nbsp; &nbsp; &nbsp; &nbsp; DINT;//&nbsp;&nbsp;初始化PIE中断控制寄存器&nbsp; &nbsp; &nbsp; &nbsp; InitPieCtrl();//&nbsp; &nbsp;关闭CPU中断，清除CPU中断标志&nbsp; &nbsp; &nbsp; &nbsp; IER = 0x0000;&nbsp; &nbsp; &nbsp; &nbsp; IFR = 0x0000;//&nbsp;&nbsp;初始化PIE中断向量表&nbsp; &nbsp; &nbsp; &nbsp; InitPieVectTable();&nbsp; &nbsp; &nbsp; &nbsp; EALLOW;&nbsp; &nbsp; &nbsp; &nbsp; PieVectTable.ECAN0INTB = &amp;canb_receive_isr;&nbsp; &nbsp; &nbsp; &nbsp; EDIS;// 4 初始化设备&nbsp; &nbsp; &nbsp; &nbsp; InitECanb();// 5 用户代码// 写MSGID&nbsp; &nbsp; &nbsp; &nbsp; ECanbMboxes.MBOX25.MSGID.all = 0x04000000;&nbsp; &nbsp; &nbsp; &nbsp; ECanbMboxes.MBOX5.MSGID.all&nbsp;&nbsp;= 0x07000000;// 配置邮箱25为发送邮箱&nbsp; &nbsp; &nbsp; &nbsp; ECanbShadow.CANMD.all = ECanbRegs.CANMD.all;&nbsp; &nbsp; &nbsp; &nbsp; ECanbShadow.CANMD.bit.MD25 = 0;&nbsp; &nbsp; &nbsp; &nbsp; ECanbShadow.CANMD.bit.MD5 = 1;&nbsp; &nbsp; &nbsp; &nbsp; ECanbRegs.CANMD.all = ECanbShadow.CANMD.all;// 使能邮箱25&nbsp; &nbsp; &nbsp; &nbsp; ECanbShadow.CANME.all = ECanbRegs.CANME.all;&nbsp; &nbsp; &nbsp; &nbsp; ECanbShadow.CANME.bit.ME25 = 1;&nbsp; &nbsp; ECanbShadow.CANME.bit.ME5&nbsp;&nbsp;= 1;&nbsp; &nbsp; &nbsp; &nbsp; ECanbRegs.CANME.all = ECanbShadow.CANME.all;// 在消息控制器中写DLC区：数据长度为8&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; ECanbMboxes.MBOX25.MSGCTRL.bit.DLC = 2;//数据长度&nbsp; &nbsp; &nbsp; &nbsp; ECanbMboxes.MBOX5.MSGCTRL.bit.DLC = 8;&nbsp;&nbsp;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; // MBOX25数据为0002&nbsp; &nbsp; &nbsp; &nbsp; ECanbMboxes.MBOX25.MDL.byte.BYTE0 = 0x00;&nbsp; &nbsp; &nbsp; &nbsp; ECanbMboxes.MBOX25.MDL.byte.BYTE1 = 0x02;&nbsp; &nbsp; &nbsp; &nbsp; // 没有远程应答帧请求&nbsp; &nbsp; &nbsp; &nbsp; ECanbMboxes.MBOX5.MSGCTRL.bit.RTR = 0;&nbsp; &nbsp; &nbsp; &nbsp; // 邮箱中断使能&nbsp; &nbsp; &nbsp; &nbsp; EALLOW;&nbsp; &nbsp; &nbsp; &nbsp; ECanbRegs.CANMIM.all = 0xFFFFFFFF; // 使能所有的邮箱产生中断，没有用到的邮箱不产生中断&nbsp; &nbsp; &nbsp; &nbsp; // 邮箱中断将产生ECAN0INT中断&nbsp; &nbsp; &nbsp; &nbsp; ECanbRegs.CANMIL.all = 0; // 在中断线0产生中断&nbsp; &nbsp; &nbsp; &nbsp; ECanbRegs.CANGIF0.all = 0xFFFFFFFF; // 全局中断标志寄存器&nbsp; &nbsp; &nbsp; &nbsp; // ECAN0INT中断请求线使能&nbsp; &nbsp; &nbsp; &nbsp; ECanbRegs.CANGIM.bit.I0EN = 1; // 使能中断线0产生中断&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; EDIS;&nbsp; &nbsp; &nbsp; &nbsp; // 使能中断&nbsp; &nbsp; &nbsp; &nbsp; IER |= M_INT9;&nbsp; &nbsp; &nbsp; &nbsp; // 使能PIE中断&nbsp; &nbsp; &nbsp; &nbsp; PieCtrlRegs.PIEIER9.bit.INTx7 = 1;&nbsp; &nbsp; &nbsp; &nbsp; PieCtrlRegs.PIEACK.bit.ACK9&nbsp; &nbsp;= 1;&nbsp; &nbsp; &nbsp; &nbsp; EINT;&nbsp; &nbsp; &nbsp; &nbsp; ERTM; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp;&nbsp;&nbsp; &nbsp; Send();&nbsp; &nbsp;&nbsp; &nbsp; for(;;);}Uint16 Send(void){&nbsp; &nbsp; &nbsp; &nbsp; struct ECAN_REGS ECanbShadow;&nbsp; &nbsp; &nbsp; &nbsp; ECanbShadow.CANTRS.all = 0;&nbsp; &nbsp; ECanbShadow.CANTRS.bit.TRS25 = 1;&nbsp; &nbsp; ECanbRegs.CANTRS.all = ECanbShadow.CANTRS.all;&nbsp; &nbsp; do{&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; ECanbShadow.CANTA.all = ECanbRegs.CANTA.all;&nbsp; &nbsp; }while((ECanbShadow.CANTA.bit.TA25 == 0));&nbsp; &nbsp; ECanbShadow.CANTA.all = 0;&nbsp; &nbsp; ECanbShadow.CANTA.bit.TA25 = 1;&nbsp; &nbsp; ECanbRegs.CANTA.all = ECanbShadow.CANTA.all;&nbsp; &nbsp; &nbsp; &nbsp; return 1;}interrupt void canb_receive_isr(void){&nbsp; &nbsp; &nbsp; &nbsp; struct ECAN_REGS ECanbShadow;&nbsp; &nbsp; &nbsp; &nbsp; ECanbShadow.CANRMP.all = ECanbRegs.CANRMP.all;&nbsp; &nbsp; &nbsp; &nbsp; while(ECanbShadow.CANRMP.bit.RMP5 != 1); &nbsp; &nbsp; &nbsp; &nbsp; ECanbRegs.CANRMP.bit.RMP5 = 1; // 复位RMP，同时复位中断标志&nbsp; &nbsp; ECanbRegs.CANRMP.all = ECanbShadow.CANRMP.all;&nbsp; &nbsp; &nbsp; &nbsp; recData_L = ECanbMboxes.MBOX5.MDL.all;&nbsp; &nbsp; &nbsp; &nbsp; recData_H = ECanbMboxes.MBOX5.MDH.all;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; PieCtrlRegs.PIEACK.bit.ACK9 = 1;&nbsp; &nbsp; &nbsp; &nbsp; EINT;}

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