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/
encodePacket.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 "encodePacket.h" |
| sblair | 0:230c10b228ea | 2 | #include "svEncodeBasic.h" |
| sblair | 0:230c10b228ea | 3 | |
| sblair | 0:230c10b228ea | 4 | int getLengthBytes(int len) { |
| sblair | 0:230c10b228ea | 5 | if (len <= 126) { |
| sblair | 0:230c10b228ea | 6 | return 1; |
| sblair | 0:230c10b228ea | 7 | } |
| sblair | 0:230c10b228ea | 8 | else if (len <= 255) { |
| sblair | 0:230c10b228ea | 9 | return 2; |
| sblair | 0:230c10b228ea | 10 | } |
| sblair | 0:230c10b228ea | 11 | else { |
| sblair | 0:230c10b228ea | 12 | return 3; |
| sblair | 0:230c10b228ea | 13 | } |
| sblair | 0:230c10b228ea | 14 | } |
| sblair | 0:230c10b228ea | 15 | |
| sblair | 0:230c10b228ea | 16 | int encodeLength(unsigned char *buf, CTYPE_INT16U len) { |
| sblair | 0:230c10b228ea | 17 | if (len <= 126) { |
| sblair | 0:230c10b228ea | 18 | buf[0] = (unsigned char) len; |
| sblair | 0:230c10b228ea | 19 | return 1; |
| sblair | 0:230c10b228ea | 20 | } |
| sblair | 0:230c10b228ea | 21 | else if (len <= 255) { |
| sblair | 0:230c10b228ea | 22 | buf[0] = (unsigned char) 0x81; // 0x80 specifies larger than one byte; 0x02 is number of length bytes to follow |
| sblair | 0:230c10b228ea | 23 | buf[1] = (unsigned char) len; |
| sblair | 0:230c10b228ea | 24 | |
| sblair | 0:230c10b228ea | 25 | return 2; |
| sblair | 0:230c10b228ea | 26 | } |
| sblair | 0:230c10b228ea | 27 | else { |
| sblair | 0:230c10b228ea | 28 | // assume length is not greater than 2^15 |
| sblair | 0:230c10b228ea | 29 | buf[0] = (unsigned char) 0x82; // 0x80 specifies larger than one byte; 0x02 is number of length bytes to follow |
| sblair | 0:230c10b228ea | 30 | ENCODE_CTYPE_INT16U(&buf[1], &len); |
| sblair | 0:230c10b228ea | 31 | |
| sblair | 0:230c10b228ea | 32 | return 3; |
| sblair | 0:230c10b228ea | 33 | } |
| sblair | 0:230c10b228ea | 34 | } |