关于DSP28335的CAN通讯，想要同时开启CANA和CANB模块时，CANB模块发送数据无法成果的相关的问题。

想同时利用DSP28335的CANA和CANB同时进行通信，在自响应测试（ACK）模式下，两路CAN均可以正常进行。但是，当设置为正常通讯模式时，CANB线路的信号总是会卡在ECanbRegs.CANTA.all != 0x0000FFFF的等待循环中，CAN总线上也监测不到任何响应。应该要如何修改呢？

CANB的配置完全是按照CANA的模式修改的，仅仅把ECana改成了ECanb，邮箱的地址进行了修改，保证没有冲突。是这里使用的不当吗？

具体代码如下：在ACK模式下，均可以正常运行，但是，在正常通讯模式下，ECANb会发送失败，在循环中卡住。

#include "DSP2833x_Device.h"// DSP2833x Headerfile Include File
#include "DSP2833x_Examples.h"// DSP2833x Examples Include File
// Global variable for this example
Uint32  MessageReceivedCount;
void main(void)
{
// eCAN control registers require read/write access using 32-bits.  Thus we
// will create a set of shadow registers for this example.  These shadow
// registers will be used to make sure the access is 32-bits and not 16.struct ECAN_REGS ECanaShadow;struct ECAN_REGS ECanbShadow;

// Step 1. Initialize System Control:
// PLL, WatchDog, enable Peripheral Clocks
// This example function is found in the DSP2833x_SysCtrl.c file.InitSysCtrl();

// Step 2. Initalize GPIO: 
// This example function is found in the DSP2833x_Gpio.c file and
// illustrates how to set the GPIO to it's default state.
// InitGpio();  // Skipped for this example  

// For this example, configure CAN pins using GPIO regs here
// This function is found in DSP2833x_ECan.c//InitECanGpio();InitECanaGpio();InitECanbGpio();
// Step 3. Clear all interrupts and initialize PIE vector table:
// Disable CPU interruptsDINT;

// Initialize PIE control registers to their default state.
// The default state is all PIE interrupts disabled and flags
// are cleared.  
// This function is found in the DSP2833x_PieCtrl.c file.InitPieCtrl();

// Disable CPU interrupts and clear all CPU interrupt flags:IER = 0x0000;IFR = 0x0000;

// Initialize the PIE vector table with pointers to the shell Interrupt 
// Service Routines (ISR).  
// This will populate the entire table, even if the interrupt
// is not used in this example.  This is useful for debug purposes.
// The shell ISR routines are found in DSP2833x_DefaultIsr.c.
// This function is found in DSP2833x_PieVect.c.InitPieVectTable();

// Step 4. Initialize all the Device Peripherals:
// This function is found in DSP2833x_InitPeripherals.c
// InitPeripherals(); // Not required for this example
 
// Step 5. User specific code, enable interrupts:// eCAN control registers require 32-bit access.// If you want to write to a single bit, the compiler may break this// access into a 16-bit access.  One solution, that is presented here,// is to use a shadow register to force the 32-bit access.// Read the entire register into a shadow register.  This access// will be 32-bits.  Change the desired bit and copy the value back// to the eCAN register with a 32-bit write.// Configure the eCAN RX and TX pins for eCAN transmissionsEALLOW;//CAN AECanaShadow.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;//CAN BECanbShadow.CANTIOC.all = ECanbRegs.CANTIOC.all;ECanbShadow.CANTIOC.bit.TXFUNC = 1;ECanbRegs.CANTIOC.all = ECanbShadow.CANTIOC.all;ECanbShadow.CANRIOC.all = ECanbRegs.CANRIOC.all;ECanbShadow.CANRIOC.bit.RXFUNC = 1;ECanbRegs.CANRIOC.all = ECanbShadow.CANRIOC.all;EDIS;// Disable all Mailboxes// Since this write is to the entire register (instead of a bit// field) a shadow register is not required.ECanaRegs.CANME.all = 0;ECanbRegs.CANME.all = 0;// Mailboxs can be written to 16-bits or 32-bits at a time// Write to the MSGID field of TRANSMIT mailboxes MBOX0 - 15//CAN AECanaMboxes.MBOX0.MSGID.all = 0x95550093;ECanaMboxes.MBOX1.MSGID.all = 0x95550094;ECanaMboxes.MBOX2.MSGID.all = 0x95550122;ECanaMboxes.MBOX3.MSGID.all = 0x95550125;ECanaMboxes.MBOX4.MSGID.all = 0x955501A1;ECanaMboxes.MBOX5.MSGID.all = 0x955501A2;ECanaMboxes.MBOX6.MSGID.all = 0x95550132;ECanaMboxes.MBOX7.MSGID.all = 0x95550135;ECanaMboxes.MBOX8.MSGID.all = 0x955501B1;ECanaMboxes.MBOX9.MSGID.all = 0x955501B2;ECanaMboxes.MBOX10.MSGID.all = 0x9555AAAA;ECanaMboxes.MBOX11.MSGID.all = 0x9555AAAB;ECanaMboxes.MBOX12.MSGID.all = 0x9555AAAC;ECanaMboxes.MBOX13.MSGID.all = 0x9555AAAD;ECanaMboxes.MBOX14.MSGID.all = 0x9555AAAE;ECanaMboxes.MBOX15.MSGID.all = 0x9555AAAF;//CAN BECanbMboxes.MBOX0.MSGID.all = 0x9555B051;ECanbMboxes.MBOX1.MSGID.all = 0x9555B052;ECanbMboxes.MBOX2.MSGID.all = 0x9555B053;ECanbMboxes.MBOX3.MSGID.all = 0x9555B054;ECanbMboxes.MBOX4.MSGID.all = 0x9555B055;ECanbMboxes.MBOX5.MSGID.all = 0x9555B056;ECanbMboxes.MBOX6.MSGID.all = 0x9555B057;ECanbMboxes.MBOX7.MSGID.all = 0x9555B058;ECanbMboxes.MBOX8.MSGID.all = 0x9555B059;ECanbMboxes.MBOX9.MSGID.all = 0x9555B060;ECanbMboxes.MBOX10.MSGID.all = 0x9555B061;ECanbMboxes.MBOX11.MSGID.all = 0x9555B062;ECanbMboxes.MBOX12.MSGID.all = 0x9555B063;ECanbMboxes.MBOX13.MSGID.all = 0x9555B064;ECanbMboxes.MBOX14.MSGID.all = 0x9555B065;ECanbMboxes.MBOX15.MSGID.all = 0x9555B066;// Write to the MSGID field of RECEIVE mailboxes MBOX16 - 31//CAN AECanaMboxes.MBOX16.MSGID.all = 0x95550093;ECanaMboxes.MBOX17.MSGID.all = 0x95550094;ECanaMboxes.MBOX18.MSGID.all = 0x95550122;ECanaMboxes.MBOX19.MSGID.all = 0x95550125;ECanaMboxes.MBOX20.MSGID.all = 0x955501A1;ECanaMboxes.MBOX21.MSGID.all = 0x955501A2;ECanaMboxes.MBOX22.MSGID.all = 0x95550132;ECanaMboxes.MBOX23.MSGID.all = 0x95550135;ECanaMboxes.MBOX24.MSGID.all = 0x955501B1;ECanaMboxes.MBOX25.MSGID.all = 0x955501B2;ECanaMboxes.MBOX26.MSGID.all = 0x95550093;ECanaMboxes.MBOX27.MSGID.all = 0x95550094;ECanaMboxes.MBOX28.MSGID.all = 0x9555AAAC;ECanaMboxes.MBOX29.MSGID.all = 0x9555AAAD;ECanaMboxes.MBOX30.MSGID.all = 0x9555AAAE;ECanaMboxes.MBOX31.MSGID.all = 0x9555AAAF;//CAN BECanbMboxes.MBOX16.MSGID.all = 0x9555B051;ECanbMboxes.MBOX17.MSGID.all = 0x9555B052;ECanbMboxes.MBOX18.MSGID.all = 0x9555B053;ECanbMboxes.MBOX19.MSGID.all = 0x9555B054;ECanbMboxes.MBOX20.MSGID.all = 0x9555B055;ECanbMboxes.MBOX21.MSGID.all = 0x9555B056;ECanbMboxes.MBOX22.MSGID.all = 0x9555B057;ECanbMboxes.MBOX23.MSGID.all = 0x9555B058;ECanbMboxes.MBOX24.MSGID.all = 0x9555B059;ECanbMboxes.MBOX25.MSGID.all = 0x9555B060;ECanbMboxes.MBOX26.MSGID.all = 0x9555B061;ECanbMboxes.MBOX27.MSGID.all = 0x9555B062;ECanbMboxes.MBOX28.MSGID.all = 0x9555B063;ECanbMboxes.MBOX29.MSGID.all = 0x9555B064;ECanbMboxes.MBOX30.MSGID.all = 0x9555B065;ECanbMboxes.MBOX31.MSGID.all = 0x9555B066;// Configure Mailboxes 0-15 as Tx, 16-31 as Rx// Since this write is to the entire register (instead of a bit// field) a shadow register is not required.ECanaRegs.CANMD.all = 0xFFFF0000;ECanbRegs.CANMD.all = 0xFFFF0000;// Enable all Mailboxes */// Since this write is to the entire register (instead of a bit// field) a shadow register is not required.ECanbRegs.CANME.all = 0xFFFFFFFF;ECanaRegs.CANME.all = 0xFFFFFFFF;// Specify that 8 bits will be sent/received//CAN AECanaMboxes.MBOX0.MSGCTRL.bit.DLC = 8;ECanaMboxes.MBOX1.MSGCTRL.bit.DLC = 8;ECanaMboxes.MBOX2.MSGCTRL.bit.DLC = 8;ECanaMboxes.MBOX3.MSGCTRL.bit.DLC = 8;ECanaMboxes.MBOX4.MSGCTRL.bit.DLC = 8;ECanaMboxes.MBOX5.MSGCTRL.bit.DLC = 8;ECanaMboxes.MBOX6.MSGCTRL.bit.DLC = 8;ECanaMboxes.MBOX7.MSGCTRL.bit.DLC = 8;ECanaMboxes.MBOX8.MSGCTRL.bit.DLC = 8;ECanaMboxes.MBOX9.MSGCTRL.bit.DLC = 8;ECanaMboxes.MBOX10.MSGCTRL.bit.DLC = 8;ECanaMboxes.MBOX11.MSGCTRL.bit.DLC = 8;ECanaMboxes.MBOX12.MSGCTRL.bit.DLC = 8;ECanaMboxes.MBOX13.MSGCTRL.bit.DLC = 8;ECanaMboxes.MBOX14.MSGCTRL.bit.DLC = 8;ECanaMboxes.MBOX15.MSGCTRL.bit.DLC = 8;//CAN BECanbMboxes.MBOX0.MSGCTRL.bit.DLC = 8;ECanbMboxes.MBOX1.MSGCTRL.bit.DLC = 8;ECanbMboxes.MBOX2.MSGCTRL.bit.DLC = 8;ECanbMboxes.MBOX3.MSGCTRL.bit.DLC = 8;ECanbMboxes.MBOX4.MSGCTRL.bit.DLC = 8;ECanbMboxes.MBOX5.MSGCTRL.bit.DLC = 8;ECanbMboxes.MBOX6.MSGCTRL.bit.DLC = 8;ECanbMboxes.MBOX7.MSGCTRL.bit.DLC = 8;ECanbMboxes.MBOX8.MSGCTRL.bit.DLC = 8;ECanbMboxes.MBOX9.MSGCTRL.bit.DLC = 8;ECanbMboxes.MBOX10.MSGCTRL.bit.DLC = 8;ECanbMboxes.MBOX11.MSGCTRL.bit.DLC = 8;ECanbMboxes.MBOX12.MSGCTRL.bit.DLC = 8;ECanbMboxes.MBOX13.MSGCTRL.bit.DLC = 8;ECanbMboxes.MBOX14.MSGCTRL.bit.DLC = 8;ECanbMboxes.MBOX15.MSGCTRL.bit.DLC = 8;// No remote frame is requested// Since RTR bit is undefined upon reset,// it must be initialized to the proper value//CAN AECanaMboxes.MBOX0.MSGCTRL.bit.RTR = 0;ECanaMboxes.MBOX1.MSGCTRL.bit.RTR = 0;ECanaMboxes.MBOX2.MSGCTRL.bit.RTR = 0;ECanaMboxes.MBOX3.MSGCTRL.bit.RTR = 0;ECanaMboxes.MBOX4.MSGCTRL.bit.RTR = 0;ECanaMboxes.MBOX5.MSGCTRL.bit.RTR = 0;ECanaMboxes.MBOX6.MSGCTRL.bit.RTR = 0;ECanaMboxes.MBOX7.MSGCTRL.bit.RTR = 0;ECanaMboxes.MBOX8.MSGCTRL.bit.RTR = 0;ECanaMboxes.MBOX9.MSGCTRL.bit.RTR = 0;ECanaMboxes.MBOX10.MSGCTRL.bit.RTR = 0;ECanaMboxes.MBOX11.MSGCTRL.bit.RTR = 0;ECanaMboxes.MBOX12.MSGCTRL.bit.RTR = 0;ECanaMboxes.MBOX13.MSGCTRL.bit.RTR = 0;ECanaMboxes.MBOX14.MSGCTRL.bit.RTR = 0;ECanaMboxes.MBOX15.MSGCTRL.bit.RTR = 0;//CAN BECanbMboxes.MBOX0.MSGCTRL.bit.RTR = 0;ECanbMboxes.MBOX1.MSGCTRL.bit.RTR = 0;ECanbMboxes.MBOX2.MSGCTRL.bit.RTR = 0;ECanbMboxes.MBOX3.MSGCTRL.bit.RTR = 0;ECanbMboxes.MBOX4.MSGCTRL.bit.RTR = 0;ECanbMboxes.MBOX5.MSGCTRL.bit.RTR = 0;ECanbMboxes.MBOX6.MSGCTRL.bit.RTR = 0;ECanbMboxes.MBOX7.MSGCTRL.bit.RTR = 0;ECanbMboxes.MBOX8.MSGCTRL.bit.RTR = 0;ECanbMboxes.MBOX9.MSGCTRL.bit.RTR = 0;ECanbMboxes.MBOX10.MSGCTRL.bit.RTR = 0;ECanbMboxes.MBOX11.MSGCTRL.bit.RTR = 0;ECanbMboxes.MBOX12.MSGCTRL.bit.RTR = 0;ECanbMboxes.MBOX13.MSGCTRL.bit.RTR = 0;ECanbMboxes.MBOX14.MSGCTRL.bit.RTR = 0;ECanbMboxes.MBOX15.MSGCTRL.bit.RTR = 0;// Write to the mailbox RAM field of MBOX0 - 15//CAN AECanaMboxes.MBOX0.MDL.all = 0xBF;ECanaMboxes.MBOX0.MDH.all = 0x00;ECanaMboxes.MBOX1.MDL.all = 0xB5;ECanaMboxes.MBOX1.MDH.all = 0x00;ECanaMboxes.MBOX2.MDL.all = 0xB4;ECanaMboxes.MBOX2.MDH.all = 0x00;ECanaMboxes.MBOX3.MDL.all = 0xBE;ECanaMboxes.MBOX3.MDH.all = 0x00;ECanaMboxes.MBOX4.MDL.all = 0x1;ECanaMboxes.MBOX4.MDH.all = 0x00;ECanaMboxes.MBOX5.MDL.all = 0x2;ECanaMboxes.MBOX5.MDH.all = 0x00;ECanaMboxes.MBOX6.MDL.all = 0xB4;ECanaMboxes.MBOX6.MDH.all = 0x00;ECanaMboxes.MBOX7.MDL.all = 0xBE;ECanaMboxes.MBOX7.MDH.all = 0x00;ECanaMboxes.MBOX8.MDL.all = 0x1;ECanaMboxes.MBOX8.MDH.all = 0x00;ECanaMboxes.MBOX9.MDL.all = 0x2;ECanaMboxes.MBOX9.MDH.all = 0x00;ECanaMboxes.MBOX10.MDL.all = 0x9555AAAA;ECanaMboxes.MBOX10.MDH.all = 0x89ABCDEF;ECanaMboxes.MBOX11.MDL.all = 0x9555AAAB;ECanaMboxes.MBOX11.MDH.all = 0x89ABCDEF;ECanaMboxes.MBOX12.MDL.all = 0x9555AAAC;ECanaMboxes.MBOX12.MDH.all = 0x89ABCDEF;ECanaMboxes.MBOX13.MDL.all = 0x9555AAAD;ECanaMboxes.MBOX13.MDH.all = 0x89ABCDEF;ECanaMboxes.MBOX14.MDL.all = 0x9555AAAE;ECanaMboxes.MBOX14.MDH.all = 0x89ABCDEF;ECanaMboxes.MBOX15.MDL.all = 0x9555AAAF;ECanaMboxes.MBOX15.MDH.all = 0x89ABCDEF;//CAN BECanbMboxes.MBOX0.MDL.all = 0xBFB;ECanbMboxes.MBOX0.MDH.all = 0x00B;ECanbMboxes.MBOX1.MDL.all = 0xB5B;ECanbMboxes.MBOX1.MDH.all = 0x00B;ECanbMboxes.MBOX2.MDL.all = 0xB4B;ECanbMboxes.MBOX2.MDH.all = 0x00B;ECanbMboxes.MBOX3.MDL.all = 0xBEB;ECanbMboxes.MBOX3.MDH.all = 0x00B;ECanbMboxes.MBOX4.MDL.all = 0x1B;ECanbMboxes.MBOX4.MDH.all = 0x00B;ECanbMboxes.MBOX5.MDL.all = 0x2B;ECanbMboxes.MBOX5.MDH.all = 0x00B;ECanbMboxes.MBOX6.MDL.all = 0xB4B;ECanbMboxes.MBOX6.MDH.all = 0x00B;ECanbMboxes.MBOX7.MDL.all = 0xBEB;ECanbMboxes.MBOX7.MDH.all = 0x00B;ECanbMboxes.MBOX8.MDL.all = 0x1B;ECanbMboxes.MBOX8.MDH.all = 0x00B;ECanbMboxes.MBOX9.MDL.all = 0x2B;ECanbMboxes.MBOX9.MDH.all = 0x00B;ECanbMboxes.MBOX10.MDL.all = 0x9555BAAA;ECanbMboxes.MBOX10.MDH.all = 0x89ABCDEB;ECanbMboxes.MBOX11.MDL.all = 0x9555BAAB;ECanbMboxes.MBOX11.MDH.all = 0x89ABCDEB;ECanbMboxes.MBOX12.MDL.all = 0x9555BAAC;ECanbMboxes.MBOX12.MDH.all = 0x89ABCDEB;ECanbMboxes.MBOX13.MDL.all = 0x9555BAAD;ECanbMboxes.MBOX13.MDH.all = 0x89ABCDEB;ECanbMboxes.MBOX14.MDL.all = 0x9555BAAE;ECanbMboxes.MBOX14.MDH.all = 0x89ABCDEB;ECanbMboxes.MBOX15.MDL.all = 0x9555BAAF;ECanbMboxes.MBOX15.MDH.all = 0x89ABCDEB;// Since this write is to the entire register (instead of a bit// field) a shadow register is not required.EALLOW;ECanaRegs.CANMIM.all = 0xFFFFFFFF;ECanbRegs.CANMIM.all = 0xFFFFFFFF;// Request permission to change the configuration registersECanaShadow.CANMC.all = ECanaRegs.CANMC.all;ECanaShadow.CANMC.bit.CCR = 1;ECanaRegs.CANMC.all = ECanaShadow.CANMC.all;ECanbShadow.CANMC.all = ECanbRegs.CANMC.all;ECanbShadow.CANMC.bit.CCR = 1;ECanbRegs.CANMC.all = ECanbShadow.CANMC.all;EDIS;// Wait until the CPU has been granted permission to change the// configuration registers// Wait for CCE bit to be set..do{ECanaShadow.CANES.all = ECanaRegs.CANES.all;} while(ECanaShadow.CANES.bit.CCE != 1 );do{ECanbShadow.CANES.all = ECanbRegs.CANES.all;} while(ECanbShadow.CANES.bit.CCE != 1 );// Configure the eCAN timingEALLOW;//CAN AECanaShadow.CANBTC.all = ECanaRegs.CANBTC.all;ECanaShadow.CANBTC.bit.BRPREG = 9;// (BRPREG + 1) = 10 feeds a 15 MHz CAN clockECanaShadow.CANBTC.bit.TSEG2REG = 5 ; // to the CAN module. (150 / 10 = 15)ECanaShadow.CANBTC.bit.TSEG1REG = 7;  // Bit time = 15ECanaRegs.CANBTC.all = ECanaShadow.CANBTC.all;ECanaShadow.CANMC.all = ECanaRegs.CANMC.all;ECanaShadow.CANMC.bit.CCR = 0;ECanaRegs.CANMC.all = ECanaShadow.CANMC.all;//CAN BECanbShadow.CANBTC.all = ECanbRegs.CANBTC.all;ECanbShadow.CANBTC.bit.BRPREG = 9;// (BRPREG + 1) = 10 feeds a 15 MHz CAN clockECanbShadow.CANBTC.bit.TSEG2REG = 5 ; // to the CAN module. (150 / 10 = 15)ECanbShadow.CANBTC.bit.TSEG1REG = 7;  // Bit time = 15ECanbRegs.CANBTC.all = ECanbShadow.CANBTC.all;ECanbShadow.CANMC.all = ECanbRegs.CANMC.all;ECanbShadow.CANMC.bit.CCR = 0;ECanbRegs.CANMC.all = ECanbShadow.CANMC.all;EDIS;// Wait until the CPU no longer has permission to change the// configuration registersdo{ECanaShadow.CANES.all = ECanaRegs.CANES.all;} while(ECanaShadow.CANES.bit.CCE != 0 );do{ECanbShadow.CANES.all = ECanbRegs.CANES.all;} while(ECanbShadow.CANES.bit.CCE != 0 );// Configure the eCAN for normal mode// Enable the enhanced features of the eCAN.EALLOW;//CAN AECanaShadow.CANMC.all = ECanaRegs.CANMC.all;ECanaShadow.CANMC.bit.STM = 0;// Configure CAN for normal  modeECanaShadow.CANMC.bit.SCB = 1;// eCAN mode (reqd to access 32 mailboxes)ECanaShadow.CANMC.bit.ABO = 1;ECanaRegs.CANMC.all = ECanaShadow.CANMC.all;//CAN BECanbShadow.CANMC.all = ECanbRegs.CANMC.all;ECanbShadow.CANMC.bit.STM = 0;// Configure CAN for normal  modeECanbShadow.CANMC.bit.SCB = 1;// eCAN mode (reqd to access 32 mailboxes)ECanbShadow.CANMC.bit.ABO = 1;ECanbRegs.CANMC.all = ECanbShadow.CANMC.all;EDIS;// Begin transmittingMessageReceivedCount=0;for(;;){//CAN AECanaRegs.CANTRS.all = 0x0000FFFF;  // Set TRS for all transmit mailboxeswhile(ECanaRegs.CANTA.all != 0x0000FFFF ) {}  // Wait for all TAn bits to be set..ECanaRegs.CANTA.all = 0x0000FFFF;// Clear all TAnMessageReceivedCount++;//CAN BECanbRegs.CANTRS.all = 0x0000FFFF;  // Set TRS for all transmit mailboxeswhile(ECanbRegs.CANTA.all != 0x0000FFFF ) {}  // Wait for all TAn bits to be set..ECanbRegs.CANTA.all = 0x0000FFFF;// Clear all TAn}
}

Susan Yang：

您是否有尝试过TI例程？

C2000Ware_3_02_00_00\device_support\f2833x\examples\ecan_a_to_b_xmit

本示例使用MAILBOX5将数据传输到另一个CAN模块。该程序可以永远循环，也可以发送“ n”次，其中“ n”是TXCOUNT值。
该示例可用于检查CAN-A和CAN-B。由于CAN-B是在DSP2833x_ECan.c中初始化，它将确认所有帧由运行此代码的节点传输的。
两个CAN端 2833x DSP需要彼此连接（通过CAN收发器）

//! \b External \b Connections \n
//! – eCANA is on GPIO31 (CANTXA) and GPIO30 (CANRXA)
//! – eCANB is on GPIO8 (CANTXB) and GPIO10 (CANRXB)
//! – Connect eCANAto eCANB via CAN transceivers

Valery Zhang：

回复 Susan Yang:

您好，我尝试了您说到的案例文件，可是该案例中只配置了eCANA的发送邮箱，并没有配置相应的eCANb上的接收邮箱。我把自己DSP板子的CANA和CANB的CANH和CANL分别接在了一起，但是，运行程序时，依然是卡在TA25置位的那里，说明数据并没有顺利发送出去。DSP2833x_ECan.c的初始化过程，只是把GPIO初始化，并不涉及CAN通讯的配置过程。是我对这个例程的理解有问题吗？在案例文件的基础上，我添加了eCANb接收邮箱的配置，依然是卡在同一个位置。是什么原因呢？

正确的案例使用方法，是这样的吗？把案例程序烧写进dsp，将A路和B路的CANH和CANL分别相接，运行。是这样的操作过程吗？

Susan Yang：

回复 Valery Zhang:

之前有客户上传过测试成功的程序，您可以下载测试一下can_test.zip

e2echina.ti.com/…/24558

另外Connect eCANA to eCANB via CAN transceivers