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ebroeckerebroecker
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‎.gitmodules

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[submodule "libcan-encode-decode"]
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path = libcan-encode-decode
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url = https://github.com/reinzor/libcan-encode-decode.git

‎README.md

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# SocketCandecodeSignals
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filter to decode signals in combination with candump (socketcan tools)
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*Compile:*
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gcc -g -o socketcanDecodeSignal main.c datenbasis.c processFrame.c lib.c
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*Test with vitual can*
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**prepare virtual can:**
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sudo modprobe vcan
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sudo ip link add type vcan
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sudo ifconfig vcan0 up
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**dump vcan0 with signal decoding:**
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candump -L vcan0 | ./socketcanDecodeSignal ccl_test.dbc testFrame1 testFrame2
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**send some can frames (other terminal)**
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cansend vcan0 001#8d00100100820100
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cansend vcan0 002#0C00057003CD1F83
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**will result:**
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```
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Trying to find: Frame: testFrame1
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-- testFrame1 (0x001)
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Trying to find: Frame: testFrame2
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-- testFrame2 (0x002)
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(1456687759.303127) vcan0 sig0: 0x01 01
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(1456687759.303127) vcan0 sig1: 0x23 35
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(1456687759.303127) vcan0 sig2: 0x00 00
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(1456687759.303127) vcan0 sig3: 0x800 2048
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(1456687759.303127) vcan0 sig4: 0x100 256
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(1456687759.303127) vcan0 sig5: 0x01 01
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(1456687759.303127) vcan0 sig6: 0x00 00
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(1456687759.303127) vcan0 sig7: 0x208 520
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(1456687759.303127) vcan0 sig8: 0x00 00
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(1456687759.303127) vcan0 sig9: 0x00 00
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(1456687759.303127) vcan0 sig10: 0x00 00
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(1456687763.319899) vcan0 secSig1: 0x00 00
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(1456687763.319899) vcan0 secSig2: 0x00 00
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(1456687763.319899) vcan0 secSig3: 0x00 00
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(1456687763.319899) vcan0 secSig4: 0x02 02
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(1456687763.319899) vcan0 secSig5: 0x00 00
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(1456687763.319899) vcan0 secSig6: 0x00 00
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(1456687763.319899) vcan0 secSig7: 0x00 00
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(1456687763.319899) vcan0 secSig8: 0x03 03
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(1456687763.319899) vcan0 secSig9: 0x01 01
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(1456687763.319899) vcan0 secSig10: 0x500 1280
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(1456687763.319899) vcan0 secSig11: 0xffffffffffffff70 -144
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(1456687763.319899) vcan0 secSig12: 0x0c 12
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```
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*Test without virtualcan:*
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echo "(0.0) vcan0 001#8d00100100820100" | ./socketcanDecodeSignal ccl_test.dbc testFrame1
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```
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Trying to find: Frame: testFrame1
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-- testFrame1 (0x001)
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(0000.000000) vcan0 sig0: 0x01 01
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(0000.000000) vcan0 sig1: 0x23 35
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(0000.000000) vcan0 sig2: 0x00 00
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(0000.000000) vcan0 sig3: 0x800 2048
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(0000.000000) vcan0 sig4: 0x100 256
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(0000.000000) vcan0 sig5: 0x01 01
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(0000.000000) vcan0 sig6: 0x00 00
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(0000.000000) vcan0 sig7: 0x208 520
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(0000.000000) vcan0 sig8: 0x00 00
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(0000.000000) vcan0 sig9: 0x00 00
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(0000.000000) vcan0 sig10: 0x00 00
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```
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echo "(0.0) vcan0 001#8d00100100820100" | ./socketcanDecodeSignal ccl_test.dbc testFrame1
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```
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Trying to find: Frame: testFrame2
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-- testFrame2 (0x002)
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(0000.000001) vcan0 secSig1: 0x00 00
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(0000.000001) vcan0 secSig2: 0x00 00
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(0000.000001) vcan0 secSig3: 0x00 00
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(0000.000001) vcan0 secSig4: 0x02 02
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(0000.000001) vcan0 secSig5: 0x00 00
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(0000.000001) vcan0 secSig6: 0x00 00
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(0000.000001) vcan0 secSig7: 0x00 00
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(0000.000001) vcan0 secSig8: 0x03 03
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(0000.000001) vcan0 secSig9: 0x01 01
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(0000.000001) vcan0 secSig10: 0x500 1280
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(0000.000001) vcan0 secSig11: 0xffffffffffffff70 -144
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(0000.000001) vcan0 secSig12: 0x0c 12
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```

‎ccl_test.dbc

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VERSION "created by canmatrix"
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NS_ :
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BS_:
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BU_:
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BO_ 1 testFrame1: 8 TEST_ECU
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SG_ sig0 : 1|2@0+ (1.0,0.0) [0|0] "" CCL_TEST
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SG_ sig1 : 7|6@0+ (1.0,0.0) [0|0] "" CCL_TEST
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SG_ sig2 : 15|11@0+ (1.0,0.0) [0|0] "" CCL_TEST
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SG_ sig3 : 20|12@0+ (1.0,0.0) [0|0] "" CCL_TEST
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SG_ sig4 : 24|9@0+ (1.0,0.0) [0|0] "" CCL_TEST
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SG_ sig5 : 50|3@0+ (1.0,0.0) [0|0] "" CCL_TEST
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SG_ sig6 : 53|3@0+ (1.0,0.0) [0|0] "" CCL_TEST
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SG_ sig7 : 47|10@0+ (1.0,0.0) [0|0] "" CCL_TEST
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SG_ sig8 : 58|3@0+ (1.0,0.0) [0|0] "" CCL_TEST
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SG_ sig9 : 61|3@0+ (1.0,0.0) [0|0] "" CCL_TEST
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SG_ sig10 : 63|2@0+ (1.0,0.0) [0|0] "" CCL_TEST
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BO_ 2 testFrame2: 8 TEST_ECU
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SG_ secSig1 : 60|2@1+ (1.0,0.0) [0|0] "" CCL_TEST
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SG_ secSig2 : 55|1@1+ (1.0,0.0) [0|0] "" CCL_TEST
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SG_ secSig3 : 20|4@1+ (1.0,0.0) [0|0] "" CCL_TEST
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SG_ secSig4 : 62|2@1+ (1.0,0.0) [0|0] "" CCL_TEST
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SG_ secSig5 : 34|3@1+ (1.0,0.0) [0|0] "" CCL_TEST
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SG_ secSig6 : 37|3@1+ (1.0,0.0) [0|0] "" CCL_TEST
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SG_ secSig7 : 59|1@1- (1.0,0.0) [0|0] "" CCL_TEST
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SG_ secSig8 : 56|3@1+ (1.0,0.0) [0|0] "" CCL_TEST
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SG_ secSig9 : 52|3@1+ (1.0,0.0) [0|0] "" CCL_TEST
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SG_ secSig10 : 8|12@1+ (1.0,0.0) [0|0] "" CCL_TEST
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SG_ secSig11 : 24|10@1- (1.0,0.0) [0|0] "" CCL_TEST
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SG_ secSig12 : 0|8@1+ (1.0,0.0) [0|0] "" CCL_TEST
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‎datenbasis.c

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#include <stdio.h>
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#include "datenbasis.h"
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void add_frame(struct frame_struct **db, canid_t canID, char *frameName) {
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struct frame_struct *s;
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s = malloc(sizeof(struct frame_struct));
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s->canID = canID;
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s->signals = NULL;
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strcpy(s->name, frameName);
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HASH_ADD_INT( *db, canID, s );
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}
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struct frame_struct *find_frame(struct frame_struct *db, int canID) {
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struct frame_struct *s;
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HASH_FIND_INT( db, &canID, s );
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return s;
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/* s: output pointer */
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}
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struct frame_struct *find_frame_by_name(struct frame_struct *db, char *name) {
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struct frame_struct *s;
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for(s=db; s != NULL; s=s->hh.next) {
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if(!strcmp(s->name, name)) return s;
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}
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return 0;
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/* s: output pointer */
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}
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struct signal_struct *find_signal_by_name(struct frame_struct *frame, char *name) {
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struct signal_struct *sig;
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for(sig=frame->signals; sig != NULL; sig = sig->hh.next) {
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if(!strcmp(sig->name, name)) return sig;
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}
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return 0;
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}
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struct frame_struct *find_frame_by_signalname(struct frame_struct *db, char *name) {
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struct frame_struct *frame;
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struct signal_struct *sig;
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for(frame=db; frame != NULL; frame=frame->hh.next) {
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for(sig=frame->signals; sig != NULL; sig = sig->hh.next) {
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if(!strcmp(sig->name, name)) return frame;
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}
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}
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return 0;
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/* s: output pointer */
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}
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void add_signal(struct frame_struct *db, int frameId, char *signalName, int startBit, int signalLength, int is_big_endian, int signedState, float factor, float offset, float min, float max, char *unit, char *receiverList)
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{
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struct frame_struct *frame;
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struct signal_struct *newSignal;
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frame = find_frame(db, frameId);
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newSignal = malloc(sizeof(struct signal_struct));
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strcpy(newSignal->name, signalName);
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newSignal->startBit = startBit;
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newSignal->signalLength = signalLength;
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newSignal->is_big_endian = is_big_endian;
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newSignal->is_signed = signedState;
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newSignal->factor = factor;
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newSignal->offset = offset;
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newSignal->min = min;
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newSignal->max = max;
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strcpy(newSignal->unit, unit);
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strcpy(newSignal->receiverList, receiverList);
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HASH_ADD_STR( frame->signals, name, newSignal );
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}
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int readInDatabase(struct frame_struct **db, char *Filename)
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{
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char frameName[512], sender[512], line[512];
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char signalName[512],signedState, unit[512], receiverList[512];
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int startBit=0,signalLength=0,byteOrder=0;
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float factor=0., offset=0., min=0., max=0.;
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int frameId=0, len;
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FILE *fp;
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if(!(fp = fopen(Filename,"r")))
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{
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fprintf(stderr, "Error opening %s\n", Filename);
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return 1;
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}
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while(fgets(line,511,fp))
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{
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if(sscanf(line," BO_ %d %s %d %s",&frameId,frameName,&len,sender) == 4)
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{
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frameName[strlen(frameName)-1] = 0;
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add_frame(db, frameId, frameName);
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}
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else if(sscanf(line," SG_ %s : %d|%d@%d%c (%f,%f) [%f|%f] %s %s",signalName, &startBit, &signalLength,&byteOrder, &signedState, &factor, &offset, &min, &max, unit, receiverList ) > 5)
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{
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if (byteOrder == 0)
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{
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// following code is from https://github.com/julietkilo/CANBabel/blob/master/src/main/java/com/github/canbabel/canio/dbc/DbcReader.java:
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int pos = 7 - (startBit % 8) + (signalLength - 1);
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if (pos < 8)
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{
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startBit = startBit - signalLength + 1;
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}
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else
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{
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int cpos = 7 - (pos % 8);
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int bytes = (int)(pos / 8);
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startBit = cpos + (bytes * 8) + (int)(startBit/8) * 8;
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}
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}
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add_signal(*db, frameId, signalName, startBit, signalLength, byteOrder == 0, signedState == '-', factor, offset, min, max, unit, receiverList);
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}
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}
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return 0;
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}

‎datenbasis.h

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#if !defined _DATENBASIS_H_
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#define _DATENBASIS_H_
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#include "uthash.h"
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#include <net/if.h>
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#include <linux/can.h>
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#include "lib.h"
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struct signal_struct {
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char name[80];
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int startBit;
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int signalLength;
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int is_big_endian; // Intel = 0; Motorola (== BIG Endian) = 1
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int is_signed;
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float factor;
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float offset;
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float min;
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float max;
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char unit[80];
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char receiverList[512];
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__u8 number;
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UT_hash_handle hh;
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};
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struct frame_struct {
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canid_t canID;
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char name[80];
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struct signal_struct *signals;
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UT_hash_handle hh;
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};
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#endif
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void add_message(struct frame_struct **db, canid_t canID, char *messageName);
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struct frame_struct *find_frame(struct frame_struct *db, int canID);
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struct frame_struct *find_frame_by_name(struct frame_struct *db, char *name);
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struct signal_struct *find_signal_by_name(struct frame_struct *frame, char *name);
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struct frame_struct *find_frame_by_signalname(struct frame_struct *db, char *name);
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void add_signal(struct frame_struct *db, int frameId, char *signalName, int startBit, int signalLength, int byteOrder, int signedState, float factor, float offset, float min, float max, char *unit, char *receiverList);
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int readInDatabase(struct frame_struct **db, char *Filename);
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