TMS320F28335 CAN通信

RNGxiaohu

can通信配置can.c
! i# l+ w$ Q' r  j8 M#include “can.h”
long int i;
long loopcount = 0;
% i: {% \( Y0 E# _% `" Kvoid Ecan_Config(void)
{
struct ECAN_REGS ECanaShadow;
struct ECAN_REGS ECanbShadow;
. L/ s2 M7 K& ?% L9 n( X& n$ d// Step 5. User specific code:
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: k9 b( \; L1 y/* Write to the MSGID field */
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ECanaMboxes.MBOX0.MSGID.all = 0x95555555; // Extended Identifier
8 x1 T6 f% u- W, L2 g) ?ECanaMboxes.MBOX15.MSGID.all = 0x95555555; // Extended Identifier
* g3 B% g/ w& _  m0 I+ w5 ^2 C/ hECanbMboxes.MBOX25.MSGID.all = 0x95555555; // Extended Identifier
, l' _( i) b  Q. F9 t% C4 BECanbMboxes.MBOX0.MSGID.all = 0x95555555; // Extended Identifier

/* 配置CANA 邮箱0为发送邮箱 */
( `( c) T9 M" F0 XECanaShadow.CANMD.all =ECanaRegs.CANMD.all;
3 m, y) r2 C/ q3 k3 NECanaShadow.CANMD.bit.MD0 = 0;
ECanaRegs.CANMD.all = ECanaShadow.CANMD.all;
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" [9 s' f% b1 u* f3 R//配置CANB 邮箱25为接受邮箱
ECanbShadow.CANMD.all = ECanbRegs.CANMD.all;
, O- c! G7 {2 h  S5 m0 cECanbShadow.CANMD.bit.MD25 = 1;
ECanbRegs.CANMD.all = ECanbShadow.CANMD.all;

7 H: V  j0 e9 D, o/ q//配置CANA 邮箱0使能
ECanaShadow.CANME.all = ECanaRegs.CANME.all;
4 A4 l1 ~9 q, W, z* o/ G, SECanaShadow.CANME.bit.ME0 = 1;
ECanaRegs.CANME.all = ECanaShadow.CANME.all;

- K* b# k5 {4 Z2 x6 z//配置CANB 邮箱25使能
ECanbShadow.CANME.all = ECanbRegs.CANME.all;
6 R1 e6 R+ `! x' e5 }9 B/ C" iECanbShadow.CANME.bit.ME25 = 1;
8 |* Y6 N( c- N. ]) Y& y) PECanbRegs.CANME.all = ECanbShadow.CANME.all;

& J1 ]4 C! @' P) U8 ~4 B2 g. j/* Write to DLC field in Master Control reg */
9 e; a; a& Y; w, Z; G2 x  QECanaMboxes.MBOX0.MSGCTRL.bit.DLC = 8;
ECanbMboxes.MBOX25.MSGCTRL.bit.DLC = 8;
" r  O7 u$ g/ b/ e1 U' p5 {
//CANA 邮箱0发送信息
ECanaMboxes.MBOX0.MDL.all = 0x12345678;
: X' S  e% q& D0 k0 ]' M; rECanaMboxes.MBOX0.MDH.all = 0x87654321;

/ R/ x( o7 m& V6 a# c// ECanbMboxes.MBOX25.MDL.all = 0x12345678;
// ECanbMboxes.MBOX25.MDH.all = 0x87654321;
% |# w" X2 i9 F5 ?; D2 C2 t//
// //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;
/ Y" m6 Q8 d( s// EDIS;
/ j7 v5 \% {& S3 `. f
1 t6 \0 Y6 }! s9 T; afor( i=0; i < 1000; i++)
{
4 L- O9 \: J( RECanaShadow.CANTRS.all = 0;
ECanaShadow.CANTRS.bit.TRS0 = 1; // Set TRS for mailbox under test
/ D- x; u" I9 oECanaRegs.CANTRS.all = ECanaShadow.CANTRS.all;
# V0 U* W6 o1 R+ {; H+ K3 \" D//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
' v" a( e1 L0 X0 z6 c( A$ ndo
) D* k: J. d. Y, K8 ^4 \{
ECanaShadow.CANTA.all = ECanaRegs.CANTA.all;
- \, E* f/ ~4 h2 v} while(ECanaShadow.CANTA.bit.TA0 == 0 ); // Wait for TA5 bit to be set…
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    ECanaShadow.CANTA.all = 0;
/ g% T  T+ |$ V1 S5 |. j( Y    ECanaShadow.CANTA.bit.TA0 = 1;               // Clear TA5
  h  _! W/ s, {* w  C    ECanaRegs.CANTA.all = ECanaShadow.CANTA.all;
! r, U/ a/ U. M% ?
    loopcount ++;
}
/ o( M; u5 O4 s    ECanaShadow.CANTA.all = 0;
- G; r" h* i9 @) a    ECanaShadow.CANTA.bit.TA0 = 1;               // Clear TA5
; b/ M  V% c( C    ECanaRegs.CANTA.all = ECanaShadow.CANTA.all;

4 E7 K( u/ _; E/ A' G9 I2 A    loopcount ++;
! w5 L3 ?/ O8 c) i) k4 a }

, _: c2 _5 E7 I3 W9 b, E: ~5 u}
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CAN通信的can.h文件
3 c" a- _  d& O0 ~#ifndef CAN_H
7 E# `5 `. u% h. k/ m1 {#define CAN_H
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#include “DSP2833x_Device.h” // DSP2833x 头文件
#include “DSP2833x_Examples.h” // DSP2833x 例子相关头文件
' _* Z+ M" T  V# n6 ^void Ecan_Config(void);
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0 |. B& o2 V" ^& @( ~' ~#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。

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CLBuu

配置CANA 邮箱0使能
# _7 b' e; z+ X& J  p# c5 y) P* q" JECanaShadow.CANME.all = ECanaRegs.CANME.all;