Unterschiede zwischen den Revisionen 22 und 23
⇤ ← Revision 22 vom 23.11.2008 14:34 →
Größe: 2179
Autor: ligi
Kommentar: moving links sections to bottom
← Revision 23 vom 23.11.2008 14:36 → ⇥
Größe: 2185
Autor: ligi
Kommentar: indent
Gelöschter Text ist auf diese Art markiert. Hinzugefügter Text ist auf diese Art markiert.
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||<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' ||		  ||<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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||<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 ||		  ||<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 ||

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

  • Have a look into the Functions Decode64 and SendOutData in uart.c of the FC Firmware to see how the Data is encoded and decoded.

  • /!\ 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

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 )

Links