自己找到問題了 囧

CAN1Initialize(CAN_SYNC_JUMP_WIDTH4 &
CAN_BAUD_PRE_SCALE(0),
CAN_PHASE_SEG1_TQ(8) &
CAN_SEG2_FREE_PROG &
CAN_PHASE_SEG2_TQ(6) &
CAN_PROPAGATIONTIME_SEG_TQ(5) &
CAN_SAMPLE3TIMES );

中的CAN_BAUD_PRE_SCALE(0)應為CAN_BAUD_PRE_SCALE(1)

/* Enter Normal Mode */
CAN1SetOperationMode( CAN_IDLE_CON &
CAN_MASTERCLK_FCY &
CAN_REQ_OPERMODE_NOR &
CAN_CAPTURE_DISABLE,
CAN_DO_NOT_CMP_DATABYTES &
CAN_SFR_BUFFER_WIN ) ;
while( C1CTRL1bits.OPMODE != 0x000 );
/* Enter Normal Mode */

中CAN_SFR_BUFFER_WIN指令位置放錯...orz
應該為
CAN1SetOperationMode( CAN_IDLE_CON &
CAN_MASTERCLK_FCY &
CAN_REQ_OPERMODE_NOR &
CAN_CAPTURE_DISABLE &
CAN_SFR_BUFFER_WIN,
CAN_DO_NOT_CMP_DATABYTES) ;

另外DMA0init裡面DMA0設定錯誤是copy過來時沒copy好@@"

目前小弟所使用的是dsPIC33fJ128GP802這顆單晶片
但在使用ECAN的功能時遇上很大的瓶頸

怎麼設定都無法成功的輸出訊號

我的ECAN主要的功能是與另一棵dsPIC33做溝通

單晶片是使用8Mhz振盪器並PLL至40Mhz

底下附上ECAN & DMA的設定以及輸出所使用的函式

DAM0作為輸出所使用的buffer
DAM0作為接收所使用的buffer

void ecan1init(void){

char i;

// PPS設定
TRISBbits.TRISB8 = 0;
TRISBbits.TRISB9 = 1;

PPSOutput(PPS_C1TX,PPS_RP8); //CAN TX
PPSInput(PPS_C1RX,PPS_RP9); //CAN RX

/* Request Configuration Mode */
CAN1SetOperationMode( CAN_IDLE_CON &
CAN_MASTERCLK_FCY &
CAN_REQ_OPERMODE_CONFIG &
CAN_SFR_BUFFER_WIN &
CAN_CAPTURE_DISABLE ,
CAN_DO_NOT_CMP_DATABYTES ) ;

while( C1CTRL1bits.OPMODE != 4 );
/* Request Configuration Mode */

//Clock Initial

CAN1Initialize(CAN_SYNC_JUMP_WIDTH4 &
CAN_BAUD_PRE_SCALE(0),
CAN_PHASE_SEG1_TQ(8) &
CAN_SEG2_FREE_PROG &
CAN_PHASE_SEG2_TQ(6) &
CAN_PROPAGATIONTIME_SEG_TQ(5) &
CAN_SAMPLE3TIMES );
//Clock Initial

CAN1FIFOCon(CAN_DMA_BUF_SIZE_4);

/*ecan1WriteRxAcptFilter*/
C1CTRL1bits.WIN=1;

CAN1SetFilter ( 1 ,
CAN_FILTER_SID( 0x7FF ) &
CAN_RX_EID_EN ,
CAN_FILTER_EID( 0x02FFFF )) ;

CAN1SetBUFPNT1(CAN_FILTER1_RX_BUFFER1 );

CAN1SetMaskSource( CAN_MASK_FILTER1_MASK0, CAN_MASK_FILTER8_NO_MASK );

CAN1EnableFilter( 1 ); //Enable Filter
/*ecan1WriteRxAcptFilter*/

/*ecan1WriteRxAcptMask*/
CAN1SetMask ( 1 ,
CAN_MASK_SID ( 0x7FF ) &
CAN_MATCH_FILTER_TYPE ,
CAN_MASK_EID( 0x2FFFF ) ) ;

C1CTRL1bits.WIN=0;
/*ecan1WriteRxAcptMask*/

/* Enter Normal Mode */
CAN1SetOperationMode( CAN_IDLE_CON &
CAN_MASTERCLK_FCY &
CAN_REQ_OPERMODE_NOR &
CAN_CAPTURE_DISABLE,
CAN_DO_NOT_CMP_DATABYTES &
CAN_SFR_BUFFER_WIN ) ;
while( C1CTRL1bits.OPMODE != 0x000 );
/* Enter Normal Mode */

/* ECAN transmit/receive message control */
CAN1ClearRXFUL1();
CAN1ClearRXFUL2();
CAN1ClearRXOVF1();
CAN1ClearRXOVF2();

CAN1SetTXRXMode(0 ,
CAN_BUFFER0_IS_TX &
CAN_TX_HIGHINTM_PRI_BUFFER0 );
CAN1SetTXRXMode(1 ,
CAN_BUFFER1_IS_RX );
/* ECAN transmit/receive message control */

//enable interupts for irq
//i think this activates the DMA transfer
EnableIntCAN1;
C1INTEbits.RBIE=1;
C1INTEbits.TBIE=1;

}


/* Dma Initialization for ECAN1 Transmission */
void dma0init(void){

/*
configures the DMA0 registers: DMA0CON,
DMA0REQ,
DMA0STA,
DMA0STB,
DMA0PAD,
DMA0CNT
*/

DMACS0=0;
DMA1CON=0x2020;
DMA1REQ=0x0046; // ECAN 1 Transmit
DMA1STA= __builtin_dmaoffset(&ecan1msgBuf);
DMA1PAD=0x0442; // ECAN 1 (C1TXD)
DMA1CNT=0x0007;
DMA1CONbits.CHEN=1;

}


/* Dma Initialization for ECAN1 Reception */
void dma2init(void){

/* configures the DMA2 registers: DMA2CON,
DMA2REQ,
DMA2STA,
DMA2STB,
DMA2PAD,
DMA2CNT*/

DMACS0=0;
DMA2CON=0x0020;
DMA2REQ=0x0022; // ECAN 1 Receive
DMA2PAD=0x0440; // ECAN 1 (C1RXD)
DMA2CNT=0x0007;
DMA2STA= __builtin_dmaoffset(&ecan1msgBuf);
DMA2CONbits.CHEN=1;

}


再附上中斷所使用的中斷函式

//---------------------------------------------------------------------
// CAN interrupt handlers
//---------------------------------------------------------------------

void __attribute__((interrupt, no_auto_psv))_C1Interrupt(void)
{
IFS2bits.C1IF = 0; // clear interrupt flag
if(C1INTFbits.TBIF)
{
C1INTFbits.TBIF = 0;
}

if(C1INTFbits.RBIF)
{
C1INTFbits.RBIF = 0;
}
}


在主函式中使用ecan.h中的CAN1SendMessage來輸出

CAN1SendMessage(Txdata,8,0x1FFEFFFF,1,0,ecan1msgBuf[0],0);


Buf的設定如下

#define ECAN1_MSG_BUF_LENGTH 4
unsigned int ecan1msgBuf[ECAN1_MSG_BUF_LENGTH][8] __attribute__((space(dma),aligned(256)));

設定是參考"CE227_ECAN_Crosswire"的範例來進行設定

但是一直無法WORK :(

使用示波器看訊號在TX都是恆HIGH在RX都是恆LOW

也就是沒有訊號:(

想請各位大大幫忙:(

ECAN一直沒辦法成功WORK:(