TMS320F28335 CAN通信

RNGxiaohu

can通信配置can.c
#include “can.h”
long int i;
long loopcount = 0;
8 `7 t9 ^; R% v3 e  |8 uvoid Ecan_Config(void)
  \, A: T" T: T2 ^# Y{
6 @* E- ]: L" g4 _/ e9 d4 @( `struct ECAN_REGS ECanaShadow;
. T. ]/ e( p* J8 f% j4 wstruct ECAN_REGS ECanbShadow;
; B, [) P# E3 ~( x4 [' l0 j; S// Step 5. User specific code:
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& a  L1 q  x" U7 ?, }4 T+ f  Y3 E- Y( |/* Write to the MSGID field */
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ECanaMboxes.MBOX0.MSGID.all = 0x95555555; // Extended Identifier
4 `" l% `) @7 ^ECanaMboxes.MBOX15.MSGID.all = 0x95555555; // Extended Identifier
0 E1 f' H' q; ?  SECanbMboxes.MBOX25.MSGID.all = 0x95555555; // Extended Identifier
ECanbMboxes.MBOX0.MSGID.all = 0x95555555; // Extended Identifier
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/* 配置CANA 邮箱0为发送邮箱 */
ECanaShadow.CANMD.all =ECanaRegs.CANMD.all;
ECanaShadow.CANMD.bit.MD0 = 0;
. a) ?+ V. q5 i1 dECanaRegs.CANMD.all = ECanaShadow.CANMD.all;

//配置CANB 邮箱25为接受邮箱
$ U" w, X/ f+ I4 g9 i( ^: g( s+ i4 sECanbShadow.CANMD.all = ECanbRegs.CANMD.all;
ECanbShadow.CANMD.bit.MD25 = 1;
ECanbRegs.CANMD.all = ECanbShadow.CANMD.all;
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//配置CANA 邮箱0使能
( S9 {& M( Q& N3 ~6 e1 |ECanaShadow.CANME.all = ECanaRegs.CANME.all;
0 ~: A1 X  v( A: ^4 ~ECanaShadow.CANME.bit.ME0 = 1;
$ T/ G( z, F1 y1 J& N% U' Z- {ECanaRegs.CANME.all = ECanaShadow.CANME.all;
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//配置CANB 邮箱25使能
6 h/ ~9 }6 L1 `ECanbShadow.CANME.all = ECanbRegs.CANME.all;
  E6 _9 U3 Z( W# \ECanbShadow.CANME.bit.ME25 = 1;
ECanbRegs.CANME.all = ECanbShadow.CANME.all;

/* Write to DLC field in Master Control reg */
ECanaMboxes.MBOX0.MSGCTRL.bit.DLC = 8;
ECanbMboxes.MBOX25.MSGCTRL.bit.DLC = 8;

  j5 X# v/ E: Y8 `6 u//CANA 邮箱0发送信息
ECanaMboxes.MBOX0.MDL.all = 0x12345678;
ECanaMboxes.MBOX0.MDH.all = 0x87654321;

// ECanbMboxes.MBOX25.MDL.all = 0x12345678;
// ECanbMboxes.MBOX25.MDH.all = 0x87654321;
/ U. U! n: q* V9 f8 ^//
0 F2 z0 M9 y' F; a8 N3 b3 n( _// //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;
- Z5 o" [% I  g  a/ S' x// ECanaShadow.CANMC.bit.STM = 1; // Configure CAN for self-test mode
// ECanaRegs.CANMC.all = ECanaShadow.CANMC.all;
& |* A: j7 K+ g+ W( k// EDIS;
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for( i=0; i < 1000; i++)
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ECanaShadow.CANTRS.all = 0;
ECanaShadow.CANTRS.bit.TRS0 = 1; // Set TRS for mailbox under test
! |7 f5 @3 r; wECanaRegs.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
4 o, q: s0 R* odo
{
ECanaShadow.CANTA.all = ECanaRegs.CANTA.all;
} while(ECanaShadow.CANTA.bit.TA0 == 0 ); // Wait for TA5 bit to be set…
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  _* q5 C; H  T, W    ECanaShadow.CANTA.all = 0;
9 j* g' ]% S6 k  }5 k2 c    ECanaShadow.CANTA.bit.TA0 = 1;               // Clear TA5
    ECanaRegs.CANTA.all = ECanaShadow.CANTA.all;
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    loopcount ++;
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    ECanaShadow.CANTA.all = 0;
4 E; {: c7 X+ _1 Z8 z    ECanaShadow.CANTA.bit.TA0 = 1;               // Clear TA5
    ECanaRegs.CANTA.all = ECanaShadow.CANTA.all;
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  k/ d' a1 ?6 q% X    loopcount ++;
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  {3 t# O# f3 T9 u) _CAN通信的can.h文件
#ifndef CAN_H
# V3 ?4 j" C) X, o2 e* J% W#define CAN_H
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#include “DSP2833x_Device.h” // DSP2833x 头文件
/ J) R, L3 I" P, J9 u#include “DSP2833x_Examples.h” // DSP2833x 例子相关头文件
void Ecan_Config(void);
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#endif /* APP_CAN_H_ */

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;