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MMP » Historie » Revision 2

Revision 1 (Maximilian Seesslen, 11.07.2023 14:22) → Revision 2/14 (Maximilian Seesslen, 11.07.2023 14:29)

h1. Multipacket-Strings

There should be the posssibillity to write the complete SPI-Flash even if it takes forever.
Not every slave needs to be able to send super big blocks. But every slave should be able to
send e.g. descriptions.
There can not be multiple transfers at the same time from one node because there is no identification.

|_. Size |_. Type |
| 0x4 | Package number (0: Data contains package count) |
| 0x4 | Data |



h2. Header

|_. Size |_. Type |
| 0x4 | Object Total size |
| 0x4 | Total size Type (1=SDCard) |
| 0x4 | Flags Target node ID |
| 0x4 | CRC32 of data |



h2. Example: CANRec

PC requests an complete dump from single Node. Node will just stream it out.

h1. V2

|_. Size |_. Decription |_. Examples |
| 1 | Packet type | Standard TDT packet |
| 1 | Sub-Id; | Futher index; Sub-Sensor or more specifi kind of thing to be set |
| 1 | Data type | Int, Float, Time, Date, Percent, Promil, Multipacket-String |
| 1 | Unit | Hz, °C, Time, Date, PWM, CAN-ID, Name, Description, Room |
| 4 | Value | 32Bit |

h1. V3

|_. Size |_. Decription |_. Examples |
| 2 | Object | |
| 1 | Sub-Id; | Flags, Subid |
| 1 | Unit/Type | Hz_int, °C_centi, Time, Date, PWM_milli, CAN-ID, Name, Description, Room |
| 4 | Value | 32Bit |

h2. Flags

4 Bit multi message count
4 Bit multi message pos

Length in Bytes given via CAN?
Strings with max. 64 characters.

h2. Multimessage package

There should be the possibillity to write the complete SPI-Flash even if it takes forever.
Not every slave needs to be able to send super big blocks. But every slave should be able to
send e.g. descriptions.