| ??? 05/28/09 06:03 Read: times |
#165651 - Are you trying to copy an existing protocol? Responding to: ???'s previous message |
I'm sorry, I don't understand what you're saying.
Amor Leo Ricaborda said:
i have to communicate to remote component on UART, but fortunately i have some samples of the communication (data stream). now i need to send data to the component, which data are known(RTC time), Do you mean that you have some existing unit that you need to communicate with? This existing unit is a "black box", and you don't have details of its internal workings - but it has some kind of "protocol" on its data link, and you need to implement that same protocol? but i could not get the 2 byte sequence What 2-byte sequence? or how do they made it. How who made it? can you suggest a way to solve it? Have you spoken to the manufacturer or supplier of the unit? Don't they supply a specification for the communications? Have you searched the internet for information about it? also, CRC are on polynomial which why weak? If you are simply trying to implement an existing protocol, that really doesn't matter - you just have to implement whatever the protocol requires! |
| Topic | Author | Date |
| UART encryption algorithm | 01/01/70 00:00 | |
| Do you really mean "encryption"? | 01/01/70 00:00 | |
| Adler-32 alwas an alternative | 01/01/70 00:00 | |
| xmodem? | 01/01/70 00:00 | |
| Nothing magic | 01/01/70 00:00 | |
| Series of mathematical routine. | 01/01/70 00:00 | |
| PSX Memory card in example... | 01/01/70 00:00 | |
| Just CRC | 01/01/70 00:00 | |
| CRC encrypt? | 01/01/70 00:00 | |
| Describe your problem - not how you think of solving it | 01/01/70 00:00 | |
| why weak? --my problem | 01/01/70 00:00 | |
| More on CRC | 01/01/70 00:00 | |
| Yes thats it(i missed YOUR POST) | 01/01/70 00:00 | |
| Few 16-bit CRC combinations | 01/01/70 00:00 | |
| 16 combination? | 01/01/70 00:00 | |
| Everything on Google | 01/01/70 00:00 | |
| You forgot some | 01/01/70 00:00 | |
Most, not all | 01/01/70 00:00 | |
| Are you trying to copy an existing protocol? | 01/01/70 00:00 | |
| yes Black box | 01/01/70 00:00 | |
| You really should have said that in the first place! | 01/01/70 00:00 | |
| CRC with in different colors? | 01/01/70 00:00 | |
| pls explain | 01/01/70 00:00 |