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Commit 7ea680e1 authored by Romolo Politi's avatar Romolo Politi
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Update documentation

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# CCSDSpy
---
CCSDSpy is a library to read a data packet coming from a space mission that follows the Consultative Committee for Space Data Systems (CCSDS) standard
Current version **0.1.0**
Installation
Usage
[[_TOC_]]
## Installation
## Usage
```python
from CCSDS import CCSDS
......@@ -13,11 +17,59 @@ dat = CCSDS('BepiColombo',packet)
```
wehre *packet* is a string with the HEX rappresentation of the pachet
Limitation
## Limitation
## Data Structure
The CCSDS Header is composed by two blocks
The CCSDS Header is composed by two blocks:
+ the Source Packet Header
+ the Packet Data Field
The first one il long 48 bits the second one has a varble dimension and structure depending by the type and the content of the packet. in [Figure 1](#figure-1-telemetry-packet) is reported the structure for a Telemetry Packet.
The structure of the CCSDS class follow the structure of the packet header.
```mermaid
classDiagram
CCSDS --|> SPH
CCSDS --|> PDF
SPH --|> packetID
SPH--|> sequenceControl
PDF --|> DFHeader
class CCSDS{
+ str Data
}
class DFHeader{
+ uint PUSVersion
+ uint ServiceType
+ uint ServiceSubType
+ uint DestinationId
+ uint Synchronization
+ uint CorseTime
+ uint FineTime
+ str SCET
+ str UTCTime
}
class SPH{
+ uint packetLength
}
class packetID{
+ uint VersionNum
+ uint packetType
+ uint dataFieldHeaderFlag
+ uint Apid
+ uint Pid
+ uint Pcat
}
class sequenceControl{
+ bin SegmentationFlag
+ uint SSC
}
class PDF{
+str Data
}
```
![TM packet](docs/TM_Packet_H_eader.png)
![TM packet](docs/TM_Packet_Header.png "Telemetry packet")
####Figure 1 - Telemetry Packet
......@@ -2,6 +2,7 @@
from bitstring import BitStream
import spiceypy as spice
# Versio 0.1.0
class PacketId:
def __init__(self,data):
......
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