decode the waveform

Mono Electronic

New Member

• Apr 25, 2016

• #1

hi friends
i want to decode this waveform and get information about it.

 

Attachments

• 4.bmp

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crutschow

Well-Known Member

Most Helpful Member

• Apr 25, 2016

• #2

In order to decode it you need to know what type of modulation it is.

 

dr pepper

Well-Known Member

Most Helpful Member

• Apr 25, 2016

• #3

Looks like a radio serial transmission protocol, the preamble providing time for the agc to respond.

 

Mono Electronic

New Member

• Apr 26, 2016

• #4

H5845S20A mcu send this data to HT46R065B mcu.i cant find H5845S20A datasheet but find this HT46R065B.The third lead is responsible for reading the data.

 

Mono Electronic

New Member

• Apr 26, 2016

• #5

i want to decode it with atmega8 mcu.but i dont know how can i do it.

 

L

Les Jones

Well-Known Member

Most Helpful Member

• Apr 26, 2016

• #6

You would need to see the source code for the firmware that is running on the mcu. It will be the design or the firmware that defines the protocol. If you gave some information about what the purpose of the equipment that these two mcu's are part of it may possibly help.

Les.

 

Mono Electronic

New Member

• Apr 26, 2016

• #7

i not acsses to firmwares.i just have hardware.
i read the reciver mcu datatsheet.the lead that connect to data is I/O-ADC-PFD.
PFD function is a source clock and frequnce and cant read data.
I/O and ADC.how can decode this data with I/O pin or ADC pin?

 

Last edited: Apr 26, 2016

K

kubeek

Well-Known Member

Most Helpful Member

• Apr 26, 2016

• #8

Is there a clock connection between the two processors?

 

Mono Electronic

New Member

• Apr 26, 2016

• #9

no ..no...
VCC/GND/DATA
DATA pin connect to third pin of HT46R065B mcu.
HT46R065B datasheet uploaded.(HT46R065B/16 DIP)

 

Attachments

• ht46r06xBv110.pdf

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alec_t

Well-Known Member

Most Helpful Member

• Apr 26, 2016

• #10

Mono Electronic said:

I/O and ADC.how can decode this data with I/O pin or ADC pin?

Click to expand...

Configure the pin as a digital input for detecting the serial bits. But, unless you know the transmission protocol and encoding method, all you can detect is a meaningless string of bits.

 

Mono Electronic

New Member

• Apr 26, 2016

• #11

yes,you are right.i want to make data reciver board with my design but i have not transmission protocol and encoding method.

 

K

kubeek

Well-Known Member

Most Helpful Member

• Apr 26, 2016

• #12

Then you probably have to guess.

 

Mono Electronic

New Member

• Apr 26, 2016

• #13

I do more research on this issue and I will let you the result.

 

Dr_Doggy

Well-Known Member

• Apr 27, 2016

• #14

y not bit bang it,
looks like IR tv remote to me,
if so,
the first long pulse and delay is like start bit, the shortest pulse is the "shift clock pulse", the length of delay between says it is logic 1 or 0, count these to get size of "words".
from there you can see bit values from words, my remote pulses 16 bits, then the same 16 bits but inverted, but not all are equal,
either way push a button , it will spit out number, use that number to call function, if that number constantly changes you have encryption OR more likely bad read cycles,
If this were a tv remote...

 

Mono Electronic

New Member

• Apr 27, 2016

• #15

its not tv remote but is as remote data.you are right.i want to read this with interrupt and timer.

 

Dr_Doggy

Well-Known Member

• Apr 28, 2016

• #16

lots of tutorials out for interrupt and timer...
also i suggest outputting to the scope is a pulse on chB that shows a reference to which part of the wave the data was recorded at that moment for easier debugging
the things mentioned are just to read it, but what kind of data does the transmitter transmit? is it reading temperature, or rc Car controller?
unless you can force the tx control values, it will as mentioned , be guessing from there what it is saying...