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Hi all,
I'm using TMS320F28335 eZDSP.
I program a code that use CANa to receive messages in Mailbox31 (0-15TX,
16-31RX). also I handle with the DSP/BIOS interrupt for the CANa module
(PIEACK.Group9.6 - ECAN1IntA).
I "build" a little CAN net: canAnalyzer --- eZDSP ----- CANKing
my problem is: I sending a NMT message to the net and I've got the interrupt,
but when i sending again I don't get any interrupt at all why?
I'm using the defualt TI setting for the CAN module and I add this code also for
setting the CANa module.
The code is:
void IniteCANModule()
{
// 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;
InitECanGpio();//from TI examples
InitECan();//from TI examples
/*Configure MSGID*/
ECanaMboxes.MBOX31.MSGID.all = 0;
/*Configure Acceptance Mask*/
ECanaLAMRegs.LAM31.all = 0x1FFFFFFF;//Don't care
/*Configure Mailboxes */
// Configure Mailboxes 0-15 as Tx, 16-31 as Rx
ECanaShadow.CANMD.all = ECanaRegs.CANMD.all;
ECanaShadow.CANMD.all = 0xFFFF0000;//Mailbox31 defined as a receive mailbox
ECanaRegs.CANMD.all = ECanaShadow.CANMD.all;
/*Configure Mailbox protected*/
ECanaShadow.CANOPC.all = ECanaRegs.CANOPC.all;
ECanaShadow.CANOPC.bit.OPC31 = 0;//the message can be overwritten
ECanaRegs.CANOPC.all = ECanaShadow.CANOPC.all;
ECanaMboxes.MBOX31.MSGCTRL.bit.DLC = 8;
/*Enable Mailboxes*/
ECanaShadow.CANME.all = ECanaRegs.CANME.all;
ECanaShadow.CANME.all = 0xFFFFFFFF;//Enable all Mailboxes
ECanaRegs.CANME.all = ECanaShadow.CANME.all;
EALLOW;
//configuration for interrupt handling
ECanaRegs.CANMIM.all = 0xFFFFFFFF; //16-31 mailboxes interrupt are enabled
ECanaRegs.CANMIL.all = 0xFFFFFFFF; //mailbox interrupt level (mapped to
eCAN1INT line lower priority CPU line 0)
ECanaRegs.CANGIM.all = 0x00002E06;
PieCtrlRegs.PIEIER9.bit.INTx6 = 1; // Enable INTx.6 of INT9 (eCAN1INT)
EDIS; // Disable EALLOW protected register access
}
Please help me with this interrupt issue.
Thanks.
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ecan接收id的问题
如果在不使用滤波的情况下，基本不用考虑id因为只有相同id得才能接收。
如果使用id滤波，那么对于增强性ecan模式来说，发送方得id就放在接收邮箱得id标志符里面，网友用程序验证过此结论。
很多人看国外的资料都不是很明白，程序验证后才明白得，这是由于对资料理解的不够透彻，或者翻译资料简单直译产生的不良后果。
在自测试模式下，发送方得id没有放到接收邮箱得id标志符里面。程序烧到flash中和外面得程序通讯才看到确实放在那里。
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