TMS320F28335 CAN通信

RNGxiaohu

can通信配置can.c
#include “can.h”
, y( i. _' K4 }2 O; Zlong int i;
long loopcount = 0;
void Ecan_Config(void)
{
) W/ A+ F4 W0 l# Ostruct ECAN_REGS ECanaShadow;
  n, S( Y* @, x- \0 ~struct ECAN_REGS ECanbShadow;
// Step 5. User specific code:

9 T- W! J1 E5 {9 |/* Write to the MSGID field */
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ECanaMboxes.MBOX0.MSGID.all = 0x95555555; // Extended Identifier
ECanaMboxes.MBOX15.MSGID.all = 0x95555555; // Extended Identifier
7 [' Z. G2 O2 C2 t3 u  r" `7 b8 I' ~ECanbMboxes.MBOX25.MSGID.all = 0x95555555; // Extended Identifier
ECanbMboxes.MBOX0.MSGID.all = 0x95555555; // Extended Identifier

( v# }1 G3 ?  {/ v' g$ ?) F/* 配置CANA 邮箱0为发送邮箱 */
+ S7 O% F8 q4 r/ ~* E/ bECanaShadow.CANMD.all =ECanaRegs.CANMD.all;
ECanaShadow.CANMD.bit.MD0 = 0;
ECanaRegs.CANMD.all = ECanaShadow.CANMD.all;
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//配置CANB 邮箱25为接受邮箱
/ U" a4 O1 Z+ K, BECanbShadow.CANMD.all = ECanbRegs.CANMD.all;
ECanbShadow.CANMD.bit.MD25 = 1;
) h/ o+ [3 {' AECanbRegs.CANMD.all = ECanbShadow.CANMD.all;

, |2 D! k9 u' o' v( s) F4 E4 w//配置CANA 邮箱0使能
ECanaShadow.CANME.all = ECanaRegs.CANME.all;
ECanaShadow.CANME.bit.ME0 = 1;
ECanaRegs.CANME.all = ECanaShadow.CANME.all;
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' U4 Y8 f: M' J  i//配置CANB 邮箱25使能
ECanbShadow.CANME.all = ECanbRegs.CANME.all;
ECanbShadow.CANME.bit.ME25 = 1;
ECanbRegs.CANME.all = ECanbShadow.CANME.all;
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/* Write to DLC field in Master Control reg */
6 A, k9 ]$ {  S; [3 bECanaMboxes.MBOX0.MSGCTRL.bit.DLC = 8;
ECanbMboxes.MBOX25.MSGCTRL.bit.DLC = 8;

//CANA 邮箱0发送信息
ECanaMboxes.MBOX0.MDL.all = 0x12345678;
5 g2 |& W! h2 g6 F" |$ ]' W! w2 AECanaMboxes.MBOX0.MDH.all = 0x87654321;

// ECanbMboxes.MBOX25.MDL.all = 0x12345678;
// ECanbMboxes.MBOX25.MDH.all = 0x87654321;
. V5 f7 G9 w6 d; k: `8 ?% L//
// //配置为自检模式，实验现象表明可以正常发送数据
// EALLOW;
// ECanaShadow.CANMC.all = ECanaRegs.CANMC.all;
// ECanaShadow.CANMC.bit.STM = 1; // Configure CAN for self-test mode
// ECanaRegs.CANMC.all = ECanaShadow.CANMC.all;
// EDIS;

2 h& O! |. Z5 s9 y# U4 ifor( i=0; i < 1000; i++)
{
* F4 P/ B" Q; `" s, }- U% A* {% AECanaShadow.CANTRS.all = 0;
ECanaShadow.CANTRS.bit.TRS0 = 1; // Set TRS for mailbox under test
ECanaRegs.CANTRS.all = ECanaShadow.CANTRS.all;
//单步运行卡在此处，需检查CAN总线是否挂载另一个节点，GPIO配置，CANA,CANB配置等问题
6 V5 ?! \0 d  H- E9 B3 {  ado
- V2 G9 v# P6 r, _  H{
ECanaShadow.CANTA.all = ECanaRegs.CANTA.all;
} while(ECanaShadow.CANTA.bit.TA0 == 0 ); // Wait for TA5 bit to be set…

    ECanaShadow.CANTA.all = 0;
    ECanaShadow.CANTA.bit.TA0 = 1;               // Clear TA5
    ECanaRegs.CANTA.all = ECanaShadow.CANTA.all;

    loopcount ++;
  [$ s+ ^& D# x. L" |1 d }
, Y3 ?% Z. J$ _2 c0 z6 S( N) W  _+ v" ?    ECanaShadow.CANTA.all = 0;
8 y1 E3 C# ?8 R3 o6 p. B    ECanaShadow.CANTA.bit.TA0 = 1;               // Clear TA5
    ECanaRegs.CANTA.all = ECanaShadow.CANTA.all;

9 A$ w+ n5 ~/ S    loopcount ++;
  X. v% {2 Z6 k) v% d3 n }

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CAN通信的can.h文件
#ifndef CAN_H
#define CAN_H
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) e8 Y  b" |0 x#include “DSP2833x_Device.h” // DSP2833x 头文件
- d3 k+ P8 z# n: P# S. k#include “DSP2833x_Examples.h” // DSP2833x 例子相关头文件
4 T. Y" ?2 ]5 H) h) d/ Ovoid Ecan_Config(void);

#endif /* APP_CAN_H_ */
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在主程序中运行该程序，则通过CAN分析仪可在PC机上看到发出1000次信息。

CLBuu

配置CANA 邮箱0使能
ECanaShadow.CANME.all = ECanaRegs.CANME.all;