DSP28035 can 通信不能成功发送数据

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reporter发表于 2013-11-20 11:38 | 只看该作者

DSP28035 can 通信不能成功发送数据

查询方式, 示波器, 朋友, 通信

最近在调试DSP28035can通信，采用查询方式发送，发送标志始终显示未发送成功，但TX管脚示波器上又有发送数据波形，但显示的波形可以看出发送的数据又是不正确的，有没有遇到过同样问题的朋友？

下面为初始化代码
void InitCan(void)
{

&nbsp; &nbsp; &nbsp; &nbsp; struct ECAN_REGS ECanaShadow;
&nbsp; &nbsp; &nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;EALLOW;
&nbsp; &nbsp; &nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;ECanaShadow.CANTIOC.all = ECanaRegs.CANTIOC.all;
&nbsp; &nbsp; &nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;ECanaShadow.CANTIOC.bit.TXFUNC = 1;
&nbsp; &nbsp; &nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;ECanaRegs.CANTIOC.all = ECanaShadow.CANTIOC.all;
&nbsp; &nbsp; &nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;ECanaShadow.CANRIOC.all = ECanaRegs.CANRIOC.all;
&nbsp; &nbsp; &nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;ECanaShadow.CANRIOC.bit.RXFUNC = 1;
&nbsp; &nbsp; &nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;ECanaRegs.CANRIOC.all = ECanaShadow.CANRIOC.all;

&nbsp; &nbsp; &nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;ECanaShadow.CANMC.all = ECanaRegs.CANMC.all;
&nbsp; &nbsp; &nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;ECanaShadow.CANMC.bit.SCB = 1;// User has selected eCAN mode
&nbsp; &nbsp; &nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;ECanaRegs.CANMC.all = ECanaShadow.CANMC.all;

&nbsp; &nbsp; &nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;ECanaMboxes.MBOX0.MSGCTRL.all = 0x00000000;
&nbsp; &nbsp; &nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;ECanaMboxes.MBOX1.MSGCTRL.all = 0x00000000;
&nbsp; &nbsp; &nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;ECanaMboxes.MBOX2.MSGCTRL.all = 0x00000000;
&nbsp; &nbsp; &nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;ECanaMboxes.MBOX3.MSGCTRL.all = 0x00000000;
&nbsp; &nbsp; &nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;ECanaMboxes.MBOX4.MSGCTRL.all = 0x00000000;
&nbsp; &nbsp; &nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;ECanaMboxes.MBOX5.MSGCTRL.all = 0x00000000;
&nbsp; &nbsp; &nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;ECanaMboxes.MBOX6.MSGCTRL.all = 0x00000000;
&nbsp; &nbsp; &nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;ECanaMboxes.MBOX7.MSGCTRL.all = 0x00000000;
&nbsp; &nbsp; &nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;ECanaMboxes.MBOX8.MSGCTRL.all = 0x00000000;
&nbsp; &nbsp; &nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;ECanaMboxes.MBOX9.MSGCTRL.all = 0x00000000;
&nbsp; &nbsp; &nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;ECanaMboxes.MBOX10.MSGCTRL.all = 0x00000000;
&nbsp; &nbsp; &nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;ECanaMboxes.MBOX11.MSGCTRL.all = 0x00000000;
&nbsp; &nbsp; &nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;ECanaMboxes.MBOX12.MSGCTRL.all = 0x00000000;
&nbsp; &nbsp; &nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;ECanaMboxes.MBOX13.MSGCTRL.all = 0x00000000;
&nbsp; &nbsp; &nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;ECanaMboxes.MBOX14.MSGCTRL.all = 0x00000000;
&nbsp; &nbsp; &nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;ECanaMboxes.MBOX15.MSGCTRL.all = 0x00000000;
&nbsp; &nbsp; &nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;ECanaMboxes.MBOX16.MSGCTRL.all = 0x00000000;
&nbsp; &nbsp; &nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;ECanaMboxes.MBOX17.MSGCTRL.all = 0x00000000;
&nbsp; &nbsp; &nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;ECanaMboxes.MBOX18.MSGCTRL.all = 0x00000000;
&nbsp; &nbsp; &nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;ECanaMboxes.MBOX19.MSGCTRL.all = 0x00000000;
&nbsp; &nbsp; &nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;ECanaMboxes.MBOX20.MSGCTRL.all = 0x00000000;
&nbsp; &nbsp; &nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;ECanaMboxes.MBOX21.MSGCTRL.all = 0x00000000;
&nbsp; &nbsp; &nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;ECanaMboxes.MBOX22.MSGCTRL.all = 0x00000000;
&nbsp; &nbsp; &nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;ECanaMboxes.MBOX23.MSGCTRL.all = 0x00000000;
&nbsp; &nbsp; &nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;ECanaMboxes.MBOX24.MSGCTRL.all = 0x00000000;
&nbsp; &nbsp; &nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;ECanaMboxes.MBOX25.MSGCTRL.all = 0x00000000;
&nbsp; &nbsp; &nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;ECanaMboxes.MBOX26.MSGCTRL.all = 0x00000000;
&nbsp; &nbsp; &nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;ECanaMboxes.MBOX27.MSGCTRL.all = 0x00000000;
&nbsp; &nbsp; &nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;ECanaMboxes.MBOX28.MSGCTRL.all = 0x00000000;
&nbsp; &nbsp; &nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;ECanaMboxes.MBOX29.MSGCTRL.all = 0x00000000;
&nbsp; &nbsp; &nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;ECanaMboxes.MBOX30.MSGCTRL.all = 0x00000000;
&nbsp; &nbsp; &nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;ECanaMboxes.MBOX31.MSGCTRL.all = 0x00000000;

&nbsp; &nbsp; &nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;ECanaRegs.CANTA.all = 0xFFFFFFFF;&nbsp; &nbsp;// Clear all TAn bits
&nbsp; &nbsp; &nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;ECanaRegs.CANRMP.all = 0xFFFFFFFF;&nbsp;&nbsp;// Clear all RMPn bits
&nbsp; &nbsp; &nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;ECanaRegs.CANGIF0.all = 0xFFFFFFFF; // Clear all interrupt flag bits
&nbsp; &nbsp; &nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;ECanaRegs.CANGIF1.all = 0xFFFFFFFF;

&nbsp; &nbsp; &nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;// Configure bit timing parameters for eCANA
&nbsp; &nbsp; &nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;ECanaShadow.CANMC.all = ECanaRegs.CANMC.all;
&nbsp; &nbsp; &nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;ECanaShadow.CANMC.bit.CCR = 1 ;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp;// Set CCR = 1
&nbsp; &nbsp; &nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;ECanaRegs.CANMC.all = ECanaShadow.CANMC.all;
&nbsp; &nbsp; &nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;// Wait until the CPU has been granted permission to change the configuration registers
&nbsp; &nbsp; &nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;do
&nbsp; &nbsp; &nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;{
&nbsp; &nbsp; &nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp; ECanaShadow.CANES.all = ECanaRegs.CANES.all;
&nbsp; &nbsp; &nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;} while(ECanaShadow.CANES.bit.CCE != 1 );

&nbsp; &nbsp; &nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;ECanaShadow.CANBTC.all = 0;

&nbsp; &nbsp; &nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;ECanaShadow.CANBTC.bit.BRPREG = 1;&nbsp; &nbsp; //2&nbsp; &nbsp;&nbsp;&nbsp;1
&nbsp; &nbsp; &nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;ECanaShadow.CANBTC.bit.TSEG2REG = 9;&nbsp;&nbsp;//1&nbsp; &nbsp;&nbsp;&nbsp;9
&nbsp; &nbsp; &nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;ECanaShadow.CANBTC.bit.TSEG1REG = 6;&nbsp;&nbsp;//6&nbsp; &nbsp;&nbsp;&nbsp;6

&nbsp; &nbsp; &nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;ECanaShadow.CANBTC.bit.SAM = 1;

&nbsp; &nbsp; &nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;ECanaRegs.CANBTC.all = ECanaShadow.CANBTC.all;

&nbsp; &nbsp; &nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;ECanaShadow.CANMC.all = ECanaRegs.CANMC.all;
&nbsp; &nbsp; &nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;ECanaShadow.CANMC.bit.CCR = 0 ;
&nbsp; &nbsp; &nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;/////////////////////////////////////////////////////
&nbsp; &nbsp; &nbsp; &nbsp;&nbsp; &nbsp; /* ECanaShadow.CANMC.bit.PDR = 0;
&nbsp; &nbsp; &nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;ECanaShadow.CANMC.bit.DBO = 0;
&nbsp; &nbsp; &nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;ECanaShadow.CANMC.bit.WUBA = 0;
&nbsp; &nbsp; &nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;ECanaShadow.CANMC.bit.CDR = 0;
&nbsp; &nbsp; &nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;ECanaShadow.CANMC.bit.ABO = 0;
&nbsp; &nbsp; &nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;ECanaShadow.CANMC.bit.STM = 0;
&nbsp; &nbsp; &nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;ECanaShadow.CANMC.bit.SRES = 0;
&nbsp; &nbsp; &nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;ECanaShadow.CANMC.bit.MBNR = 0;
&nbsp; &nbsp; &nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;ECanaShadow.CANMC.bit.SUSP = 1;*/
&nbsp; &nbsp; &nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;/////////////////////////////////////////////////////
&nbsp; &nbsp; &nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;ECanaRegs.CANMC.all = ECanaShadow.CANMC.all;
&nbsp; &nbsp; &nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;do
&nbsp; &nbsp; &nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;{
&nbsp; &nbsp; &nbsp; &nbsp;&nbsp; &nbsp;&nbsp; &nbsp; ECanaShadow.CANES.all = ECanaRegs.CANES.all;
&nbsp; &nbsp; &nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;} while(ECanaShadow.CANES.bit.CCE != 0 );
&nbsp; &nbsp; &nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;//Disable all Mailboxes
&nbsp; &nbsp; &nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;ECanaRegs.CANME.all = 0;&nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;// disable
&nbsp; &nbsp; &nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;EDIS;

&nbsp; &nbsp; &nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;EALLOW;
&nbsp; &nbsp; &nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;ECanaMboxes.MBOX0.MSGID.all = 0x00040000;//0x9555AAA0&nbsp; &nbsp;&nbsp;&nbsp;0x00040000
&nbsp; &nbsp; &nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;ECanaMboxes.MBOX0.MSGCTRL.bit.DLC = 8;&nbsp;&nbsp;//Send MailBox
&nbsp; &nbsp; &nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;ECanaMboxes.MBOX1.MSGCTRL.bit.DLC = 8;&nbsp;&nbsp;//Receive MailBox
&nbsp; &nbsp; &nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;ECanaRegs.CANMD.all =0x00000002;//0:send&nbsp; &nbsp;1:receive
&nbsp; &nbsp; &nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;ECanaRegs.CANME.all = 0x00000003;
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; EDIS;

&nbsp; &nbsp; &nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;ECanaMboxes.MBOX0.MDL.all = 0x12345678;//0x9555AAA0;
&nbsp; &nbsp; &nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;ECanaMboxes.MBOX0.MDH.all = 0x89ABCDEF;
&nbsp; &nbsp; &nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;EALLOW;
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; ECanaShadow.CANMC.all = ECanaRegs.CANMC.all;
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; ECanaShadow.CANMC.bit.STM = 0;&nbsp; &nbsp; // Configure CAN for self-test mode 1
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; ECanaShadow.CANMC.bit.DBO = 1;
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; ECanaShadow.CANMC.bit.ABO = 1;&nbsp; &nbsp; //CAN BUS ON
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; ECanaRegs.CANMC.all = ECanaShadow.CANMC.all;
&nbsp; &nbsp; &nbsp; &nbsp;&nbsp; &nbsp;&nbsp;&nbsp;EDIS;

&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; EALLOW;
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; ECanaRegs.CANMIM.all=0x00000002;//使能邮箱1接收中断

&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; ECanaRegs.CANMIL.all=0;//所有邮箱在中断0(ECANOINT)产生邮箱中断

&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; ECanaRegs.CANGIF0.all=0xFFFFFFFF;//全局中断标志寄存器CANGIF0所有标志位清零
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; ECanaRegs.CANGIF1.all=0xFFFFFFFF;//全局中断标志寄存器CANGIF1所有标志位清零

&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; ECanaRegs.CANGIM.bit.I0EN=1;//eCAN模块中中断0使能

&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; EDIS;
}&nbsp; &nbsp;&nbsp; &nbsp;

发送函数：
void sCanSend(void)
{
&nbsp; &nbsp; &nbsp; &nbsp;&nbsp;&nbsp;ECanaRegs.CANTRS.all = 0;
&nbsp; &nbsp; &nbsp; &nbsp;&nbsp;&nbsp;ECanaMboxes.MBOX0.MDL.all = 0x12345678;//0x9555AAA0;
&nbsp; &nbsp; &nbsp; &nbsp;&nbsp;&nbsp;ECanaMboxes.MBOX0.MDH.all = 0x89ABCDEF;

&nbsp; &nbsp; &nbsp; &nbsp;&nbsp;&nbsp;ECanaRegs.CANTRS.all = 0x00000001;

&nbsp; &nbsp; &nbsp; &nbsp; while(ECanaRegs.CANTA.all != 0x00000001 ) {}//程序会一直卡在这里
&nbsp; &nbsp; &nbsp; &nbsp;&nbsp;&nbsp;ECanaRegs.CANTA.all = 0x00000001;

&nbsp; &nbsp;}&nbsp; &nbsp;&nbsp;&nbsp;

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