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can通信配置can.c
( f/ Q m( y% `#include “can.h”
; k. I; t, W, a4 h( D+ \. y3 i1 u Vlong int i;
: f1 e8 a6 A dlong loopcount = 0;3 K, o6 Y% t" G% L9 w, T0 ~ k
void Ecan_Config(void)
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struct ECAN_REGS ECanaShadow;
1 n8 i! _1 @+ E' a" ?5 L0 Estruct ECAN_REGS ECanbShadow;
9 B) I, D& g6 z! K/ Q( p9 P// Step 5. User specific code: S) P7 b% i. C! I- r
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/* Write to the MSGID field */+ ]8 P8 Z r/ ]& F- b F f
; A3 t; k, V% o0 NECanaMboxes.MBOX0.MSGID.all = 0x95555555; // Extended Identifier
8 ?. Q2 O: w- i% }, f% S, | g( k6 ?8 KECanaMboxes.MBOX15.MSGID.all = 0x95555555; // Extended Identifier0 H# S, N& t; s" z, y
ECanbMboxes.MBOX25.MSGID.all = 0x95555555; // Extended Identifier
* Q% r% i% {# A3 ?$ `ECanbMboxes.MBOX0.MSGID.all = 0x95555555; // Extended Identifier
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9 m7 o# q1 k5 J! ]3 ^" T/* 配置CANA 邮箱0为发送邮箱 */
7 n' t& m3 m; V- W FECanaShadow.CANMD.all =ECanaRegs.CANMD.all;+ Q8 h3 U1 d4 i) y
ECanaShadow.CANMD.bit.MD0 = 0;7 k, Q& `( x, |' J% K
ECanaRegs.CANMD.all = ECanaShadow.CANMD.all;
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$ } y( S5 X- {% D P//配置CANB 邮箱25为接受邮箱
/ W. A! s: L$ LECanbShadow.CANMD.all = ECanbRegs.CANMD.all;( b; \8 i. S; z" r
ECanbShadow.CANMD.bit.MD25 = 1;- E8 ]' ?# @( l2 L+ h( ~* z1 `! h
ECanbRegs.CANMD.all = ECanbShadow.CANMD.all;7 c+ l* k- N. Q. M( k3 X+ ?
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//配置CANA 邮箱0使能
8 |. H, S! N+ ?ECanaShadow.CANME.all = ECanaRegs.CANME.all;
& k3 O7 G0 o1 \7 ] {8 u) k8 WECanaShadow.CANME.bit.ME0 = 1;
: i! T9 K6 c* \. e4 [ECanaRegs.CANME.all = ECanaShadow.CANME.all;
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& ~# H6 K0 Q3 l* k//配置CANB 邮箱25使能( r! T1 w9 z( K3 H W% B
ECanbShadow.CANME.all = ECanbRegs.CANME.all;
3 l3 E' S8 Z9 i* Q( p0 l zECanbShadow.CANME.bit.ME25 = 1;$ e& S- v- W) Q3 m4 D8 ~
ECanbRegs.CANME.all = ECanbShadow.CANME.all;2 }+ U3 l( y" [' e/ Y* ?- n
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/* Write to DLC field in Master Control reg */
, L1 D% s& U% T, s: `' ~2 fECanaMboxes.MBOX0.MSGCTRL.bit.DLC = 8;4 J; @! ?, }. @3 f. |; s. j4 }; N/ A
ECanbMboxes.MBOX25.MSGCTRL.bit.DLC = 8;* v/ b/ x! m( f4 k8 d3 ?+ S
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//CANA 邮箱0发送信息! R# C) ^0 f( I
ECanaMboxes.MBOX0.MDL.all = 0x12345678;" A- S: w& a( |+ `$ k$ y
ECanaMboxes.MBOX0.MDH.all = 0x87654321;
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// ECanbMboxes.MBOX25.MDL.all = 0x12345678;
) D5 b7 }8 C: x0 q1 d4 T$ P( A0 m0 _// ECanbMboxes.MBOX25.MDH.all = 0x87654321;
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// //配置为自检模式，实验现象表明可以正常发送数据
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// ECanaShadow.CANMC.all = ECanaRegs.CANMC.all;
5 ~' Q2 Q; ]7 A1 F! x7 _// ECanaShadow.CANMC.bit.STM = 1; // Configure CAN for self-test mode
* n7 N2 \, [ R9 F" S// ECanaRegs.CANMC.all = ECanaShadow.CANMC.all;4 J% G; s' G/ n0 `0 Y
// EDIS;( I2 W6 k/ @" u' G5 H. M% k9 ?
) u* H' Y. _! ifor( i=0; i < 1000; i++)& }: K- B' P- V, o- }4 q
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ECanaShadow.CANTRS.all = 0;
8 ^- a$ Q- R4 b# y% |) AECanaShadow.CANTRS.bit.TRS0 = 1; // Set TRS for mailbox under test
$ E8 o9 _# ?- p* oECanaRegs.CANTRS.all = ECanaShadow.CANTRS.all;
. L8 E7 V O" Z: S2 B//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
. c, y2 K9 _$ x0 J, ]5 i) ydo
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1 G# Y L) b( r. C8 _4 ZECanaShadow.CANTA.all = ECanaRegs.CANTA.all;
: p/ n4 t0 U% j! |. x} while(ECanaShadow.CANTA.bit.TA0 == 0 ); // Wait for TA5 bit to be set…$ g# b4 h$ m: @$ z& k- W0 Y; Y
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ECanaShadow.CANTA.all = 0;
2 m) w$ W5 u+ C3 r. A- E1 S0 E ECanaShadow.CANTA.bit.TA0 = 1; // Clear TA5$ b6 M& F% h" X" x
ECanaRegs.CANTA.all = ECanaShadow.CANTA.all;0 U2 G$ O8 S- I5 _ V
! j7 I( f% Z: H loopcount ++;
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ECanaShadow.CANTA.all = 0;
! D8 D# x; w' v0 l8 ~# W+ N3 [+ M" ? ECanaShadow.CANTA.bit.TA0 = 1; // Clear TA5& F" T9 P9 h& T$ @3 g9 p0 k
ECanaRegs.CANTA.all = ECanaShadow.CANTA.all;
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$ h3 q& V# j, @/ ?9 W loopcount ++;" f \& B4 B$ k
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# q- @, s$ q& O% e1 p; cCAN通信的can.h文件( S4 D' b- ^, Q. Y
#ifndef CAN_H0 i( m' |) H; ~8 W5 ~- O* v
#define CAN_H
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( A/ ?' F; C. L' z+ [#include “DSP2833x_Device.h” // DSP2833x 头文件3 f: c( m0 z( G; C8 t( I
#include “DSP2833x_Examples.h” // DSP2833x 例子相关头文件
2 B, K5 E3 j# l4 }) T% @; jvoid Ecan_Config(void);
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) f! L) ^0 w' q#endif /* APP_CAN_H_ */# i* `. g, v* B# H1 i0 d6 K& {5 f
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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。
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发表于 2021-11-16 14:14
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