Unterschiede zwischen den Revisionen 3 und 20 (über 17 Versionen hinweg)
⇤ ← Revision 3 vom 20.11.2008 01:59 →
Größe: 318
Autor: killagreg
Kommentar: Slave Addresses completed
← Revision 20 vom 23.11.2008 14:28 → ⇥
Größe: 2045
Autor: ligi
Kommentar: adding example for checksum
Gelöschter Text ist auf diese Art markiert. Hinzugefügter Text ist auf diese Art markiert.
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[[TableOfContents]]

= Protocol =
 . The protocol is based on individual serial data frames that are organized as shown in the following table.

||<tablewidth="690px" tableheight="43px" tablestyle="text-align: center;"bgcolor="#cccccc">Start-Byte||<bgcolor="#cccccc">Address-Byte||<bgcolor="#cccccc">ID-Byte||<bgcolor="#cccccc">n Data-Bytes coded||<bgcolor="#cccccc">CRC-Byte1||<bgcolor="#cccccc">CRC-Byte2||<bgcolor="#cccccc">Stop-Byte||
||<style="text-align: center;">'#' ||<style="text-align: center;">variable ||<style="text-align: center;">'V','D' etc ||<style="text-align: center;">"modified-base64" ||<style="text-align: center;">variable ||<style="text-align: center;">variable ||<style="text-align: center;">'\r' ||
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 . The Commands are listed [:en/SerialCommands:here]  . The Commands based on the dataframes above are listed [:en/SerialCommands:here]
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|| ''Slave-Address'' || ''Part'' ||
 || 1 || FC ||
 || 2 || NC ||
 || 3 || MK3MAG ||		 ||<tablewidth="" tablestyle="text-align: center;"bgcolor="#cccccc">Slave-Address||<bgcolor="#cccccc">Part||
||<style="text-align: center;"> 1 ||<style="text-align: center;"> FC ||
||<style="text-align: center;"> 2 ||<style="text-align: center;"> NC ||
||<style="text-align: center;"> 3 ||<style="text-align: center;"> MK3MAG ||
= Data Format =
 . /!\ ToDo: describe data-format
= Checksum =
 || unsigned int tmpCRC = 0; [[BR]] for(int i = 0; i < !DataBufferLength;i++)[[BR]] { tmpCRC += !DataBuffer[i]; } [[BR]] tmpCRC %= 4096; [[BR]] CRC1 = '=' + tmpCRC / 64; [[BR]] CRC2 = '=' + tmpCRC % 64;[[BR]] ||

 . /!\ ToDo: describe checksum calculation verbaly
= Links =
 * http://mikrokopter.de/forum/topic-1735-1.html ( german )
= Implementations =
 Sometimes its a lot more easy to look at code rather than reather than to look at Specifications/Documentation:
 * uart.c in the Flight-Ctrl Firmware ( C )
 * MKCommunicator.java from ["DUBwise"] ( Java / J2ME )
 * mktool.cpp @ ["QMKGroundStation"] ( C++ )
 * !GroundStation ( !LabView )
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 . CategoryCoding KategorieEnglish
----
KategorieFirmware		  . CategoryCoding KategorieEnglish KategorieFirmware

TableOfContents

Protocol

  • The protocol is based on individual serial data frames that are organized as shown in the following table.

Start-Byte

Address-Byte

ID-Byte

n Data-Bytes coded

CRC-Byte1

CRC-Byte2

Stop-Byte

'#'

variable

'V','D' etc

"modified-base64"

variable

variable

'\r'

Commands

  • The Commands based on the dataframes above are listed [:en/SerialCommands:here]

Slave Adresses

  • Since Navi 0.12h FC 0.71f Mag 0.19 there are constant SlaveAdresses:

Slave-Address

Part

1

FC

2

NC

3

MK3MAG

Data Format

  • /!\ ToDo: describe data-format

Checksum

  • unsigned int tmpCRC = 0; BR for(int i = 0; i < DataBufferLength;i++)BR { tmpCRC += DataBuffer[i]; } BR tmpCRC %= 4096; BR CRC1 = '=' + tmpCRC / 64; BR CRC2 = '=' + tmpCRC % 64;BR

  • /!\ ToDo: describe checksum calculation verbaly

Links

Implementations

  • Sometimes its a lot more easy to look at code rather than reather than to look at Specifications/Documentation:
  • uart.c in the Flight-Ctrl Firmware ( C )
  • MKCommunicator.java from ["DUBwise"] ( Java / J2ME )
  • mktool.cpp @ ["QMKGroundStation"] ( C++ )

  • GroundStation ( LabView )