Steven Blair
The goal of this software is to automatically generate C/C++ code which reads and writes GOOSE and Sampled Value packets. Any valid IEC 61850 Substation Configuration Description (SCD) file, describing GOOSE and/or SV communications, can be used as the input. The output code is lightweight and platform-independent, so it can run on a variety of devices, including low-cost microcontrollers. It\'s ideal for rapid-prototyping new protection and control systems that require communications. This mbed project is a simple example of this functionality. Other code: https://github.com/stevenblair/rapid61850 Project homepage: http://personal.strath.ac.uk/steven.m.blair/
gseDecodePacket.c@0:230c10b228ea, 2011-10-07 (annotated)
- Committer:
- sblair
- Date:
- Fri Oct 07 13:41:08 2011 +0000
- Revision:
- 0:230c10b228ea
- Child:
- 1:9399d44c2b1a
Who changed what in which revision?
| User | Revision | Line number | New contents of line |
|---|---|---|---|
| sblair | 0:230c10b228ea | 1 | #include "gseDecodeBasic.h" |
| sblair | 0:230c10b228ea | 2 | #include "ied.h" |
| sblair | 0:230c10b228ea | 3 | #include "gseDecode.h" |
| sblair | 0:230c10b228ea | 4 | #include "gsePacketData.h" |
| sblair | 0:230c10b228ea | 5 | #include "decodePacket.h" |
| sblair | 0:230c10b228ea | 6 | #include <stddef.h> |
| sblair | 0:230c10b228ea | 7 | |
| sblair | 0:230c10b228ea | 8 | |
| sblair | 0:230c10b228ea | 9 | |
| sblair | 0:230c10b228ea | 10 | //temp |
| sblair | 0:230c10b228ea | 11 | //#include <stdio.h> |
| sblair | 0:230c10b228ea | 12 | //#include <stdlib.h> |
| sblair | 0:230c10b228ea | 13 | |
| sblair | 0:230c10b228ea | 14 | |
| sblair | 0:230c10b228ea | 15 | |
| sblair | 0:230c10b228ea | 16 | unsigned char datasetName[65] = {0}; // maximum length of 65 bytes |
| sblair | 0:230c10b228ea | 17 | CTYPE_INT16U datasetNameLength = 0; |
| sblair | 0:230c10b228ea | 18 | |
| sblair | 0:230c10b228ea | 19 | |
| sblair | 0:230c10b228ea | 20 | void gseDecodePDU(unsigned char *buf) { |
| sblair | 0:230c10b228ea | 21 | unsigned char tag = (unsigned char) buf[0]; // assumes only one byte is used |
| sblair | 0:230c10b228ea | 22 | CTYPE_INT16U lengthFieldSize = getLengthFieldSize((unsigned char) buf[1]); |
| sblair | 0:230c10b228ea | 23 | CTYPE_INT16U lengthValue = decodeLength((unsigned char *) &buf[1]); |
| sblair | 0:230c10b228ea | 24 | CTYPE_INT16U offsetForSequence = 1 + lengthFieldSize; |
| sblair | 0:230c10b228ea | 25 | CTYPE_INT16U offsetForNonSequence = 1 + lengthFieldSize + lengthValue; |
| sblair | 0:230c10b228ea | 26 | |
| sblair | 0:230c10b228ea | 27 | //printf("tag: %x, lengthFieldSize: %i, lengthValue: %i, offset: %i\n", tag, lengthFieldSize, lengthValue, offsetForNonSequence); |
| sblair | 0:230c10b228ea | 28 | |
| sblair | 0:230c10b228ea | 29 | switch (tag) { |
| sblair | 0:230c10b228ea | 30 | case 0x61: |
| sblair | 0:230c10b228ea | 31 | gseDecodePDU(&buf[offsetForSequence]); |
| sblair | 0:230c10b228ea | 32 | break; |
| sblair | 0:230c10b228ea | 33 | case 0x82: |
| sblair | 0:230c10b228ea | 34 | // save dataset name |
| sblair | 0:230c10b228ea | 35 | memcpy(datasetName, &buf[offsetForSequence], lengthValue); |
| sblair | 0:230c10b228ea | 36 | datasetNameLength = lengthValue; |
| sblair | 0:230c10b228ea | 37 | //printf("%s, %d\n", datasetName, datasetNameLength); |
| sblair | 0:230c10b228ea | 38 | //fflush(stdout); |
| sblair | 0:230c10b228ea | 39 | |
| sblair | 0:230c10b228ea | 40 | gseDecodePDU(&buf[offsetForNonSequence]); |
| sblair | 0:230c10b228ea | 41 | break; |
| sblair | 0:230c10b228ea | 42 | case 0xAB: |
| sblair | 0:230c10b228ea | 43 | gseDecodeDataset(&buf[offsetForSequence], lengthValue, datasetName, datasetNameLength); |
| sblair | 0:230c10b228ea | 44 | return; |
| sblair | 0:230c10b228ea | 45 | //break; |
| sblair | 0:230c10b228ea | 46 | default: |
| sblair | 0:230c10b228ea | 47 | gseDecodePDU(&buf[offsetForNonSequence]); |
| sblair | 0:230c10b228ea | 48 | break; |
| sblair | 0:230c10b228ea | 49 | } |
| sblair | 0:230c10b228ea | 50 | } |
| sblair | 0:230c10b228ea | 51 | |
| sblair | 0:230c10b228ea | 52 | void gseDecode(unsigned char *buf, int len) { |
| sblair | 0:230c10b228ea | 53 | gseDecodePDU(&buf[26]); // cuts out frame header (fixed size of 26 bytes before start of APDU) |
| sblair | 0:230c10b228ea | 54 | } |