manchester encoder

using pic for 433mhz rf link

hello,i’m using the pic 16f870 usart tx/rx for sending data over rf link at 433mhz.the usart, works fine with baud rate of 4,800b/s (osc=4mhz).when i’m adding the rf link so the tx usart sends that data into the rf transmitter, and the da...
Microcontrollers :: 13 Sep 2009 20:30 :: FvM :: Replies: 3 :: Views: 450

nrzi and manchester

hi all,i need an nrzi and mancester encoder decoder documentation. please if anybody have docs on implementation of these module share it. ill be very thanks full.regards,master_picengineer...
ASIC Design Methodologies & Tools (Digital) :: 04 Sep 2009 20:14 :: nangsuep :: Replies: 1 :: Views: 237

manchester encoder decoder ic?

is there any site that have manchester encoder/decoder ic (online buy)?...
RF, Microwave, Antennas and Optics :: 04 Sep 2009 20:07 :: nangsuep :: Replies: 1 :: Views: 324

whats going wrong with the code?

i bought a rf kit, transmitter and receiver, and the website of a similar product is below. now, im trying to write code for it, just to make sure it is working. http://www.sparkfun.com/commerce/product_info.php?products_id=8950im using a pic 16f688 ...
Microcontrollers :: 25 Aug 2009 17:23 :: betwixt :: Replies: 19 :: Views: 767

problem with wireless serial transmisson

as i have bought two ask modules (tx and rx) operated at 434 mhz..http://thinklabs.in/shop/product_info.php?cpath=44&products_id=72http://thinklabs.in/shop/product_info.php?cpath=44&products_id=73and i want to make remote control robot for that i am ...
Hobby Circuits and Small Projects Problems :: 17 Jul 2009 20:56 :: betwixt :: Replies: 52 :: Views: 2375

manchester c code

i have installed mikroc and they say that there is an integrated manchester code in the libraries (or in the help) but its not that fast.does anybody have an optimised code example for a rf receiver (for tx its more simple, right?) paired with a pic ...
Microcontrollers :: 30 Jun 2009 10:15 :: Vandal S :: Replies: 2 :: Views: 333

how to remove the glitches from the output(urgent)

i have designed a manchester encoder in verilog but i am getting the glitches in the output,can any one suggest me the solution of it. i am already storing the output in the register.its urgentthanx...
PLD, SPLD, GAL, CPLD, FPGA Design :: 08 Apr 2009 11:40 :: abhisheksbox :: Replies: 3 :: Views: 348

64b/66b encoding/scrambling

hello everyone,this problem has plagued me for over 2 weeks and after all the research ive done im still confused.does anyone know if the scrambling is supposed to occur before or after the encoding? from the ieee 802 specs, they say that scrambling ...
Digital communication :: 10 Nov 2008 6:52 :: mathuranathan :: Replies: 2 :: Views: 591

need verilog code for manchester encoder/decoder

i need verilog code for manchester encoder/decoder.please help me....
PLD, SPLD, GAL, CPLD, FPGA Design :: 18 Jul 2008 20:15 :: 7rots51 :: Replies: 0 :: Views: 516

manchester encoder/decoder ic,hdlc controller ic

i want the part number of ics for hdlc controller(single channel for 100kbps speed) and manchester encoder/decoder ic,does anyone have it?---...
Professional Hardware and Electronics Design :: 07 Jul 2008 12:58 :: 7rots51 :: Replies: 0 :: Views: 255

manchester encoder /decoder

hi i am urgently in need of vhdl code for manchester encoder decoder can anybody help me in htis regards...
PLD, SPLD, GAL, CPLD, FPGA Design :: 21 May 2008 13:20 :: tooh83 :: Replies: 1 :: Views: 978

plz upload the vhdl code of manchester encoder....
PLD, SPLD, GAL, CPLD, FPGA Design :: 11 Mar 2008 12:30 :: master_picengineer :: Replies: 1 :: Views: 216

fsk modulation of 1mbps data on a pll loop

helloi want to use an analod device pll (adf4xxx) and a vco from minicircuits (in range about 2ghz, and modulate the 1mbps data on it ,my modulation type is fsk.how can i modulate this high data rate signal? what is the value of frequency seperation?...
RF, Microwave, Antennas and Optics :: 19 Jun 2007 9:33 :: 7rots51 :: Replies: 3 :: Views: 219

communication paper

hey... i need project papers about communication systems(like encoder and decoder) implementating in verilog r vhdl.. can any one pl help me.....
PLD, SPLD, GAL, CPLD, FPGA Design :: 07 Jun 2007 17:59 :: venkat3271 :: Replies: 5 :: Views: 390

vhdl explained with circuit

hello all.. can anyone suggest any book which explains vhdl code writing from given circuits, how does the code creat latch and flip flop and vice versa with lot of good examples with corresponding circuits(fir filter circuit and code ...
PLD, SPLD, GAL, CPLD, FPGA Design :: 12 Nov 2006 6:31 :: lawrence_idol :: Replies: 3 :: Views: 648

manchester encoder

im trying to design a manchester encoder circuit using a piso shift register and an xor gate. i ran into a couple problems. 1. timing: i need to synchronize the shift register output with the clock (clocking it) i.e. i need to delay the clock (runnin...
Digital communication :: 18 Oct 2006 9:52 :: Lupin :: Replies: 1 :: Views: 213

manchester encoder

im trying to design a manchester encoder circuit using a piso shift register and an xor gate. i ran into a couple problems.1. timing: i need to synchronize the shift register output with the clock (clocking it) i.e. i need to delay the clock (running...
Other Design :: 18 Oct 2006 8:31 :: Jepeto :: Replies: 8 :: Views: 708

pic + 433 mhz modules + assembler

hi:i purchase transmitter and receiver modules 433 mhz, somebody have examples with microchip pic in assembler please.thanks in advance....
Microcontrollers :: 05 Jun 2006 4:54 :: pic-novato :: Replies: 6 :: Views: 336

rf module question

can rf tx/rx module use computer serial communication encoding scheme to encode and decode?i want to connect the tx module to directly to my computer serial port and have it send out ascii data to the rx module....
Hobby Circuits and Small Projects Problems :: 27 Feb 2006 7:59 :: david90 :: Replies: 7 :: Views: 399

encoder/decoder

hi everyone !can someone tell how encoder/decoder work ?when they are in rf transmission...in the tx & rx.tq !...
Hobby Circuits and Small Projects Problems :: 15 Sep 2005 18:39 :: syed intisar haider :: Replies: 11 :: Views: 1053

rf modules with at89c51 and serial communication protocol

hii use serial communication to transmitt simple 8-bit data with start and stop bits. in the transmitter circuit, you see two buttons which allow you to press one of them. when one of them has been pressed, i was expecting to see one led to swtich ...
Microcontrollers :: 28 Aug 2005 14:07 :: Maverickmax :: Replies: 14 :: Views: 2004

code ?

hi all, therere a lot of code ( such as manchester, nrz, ... and rc5).please help me about tutorial of those code...
Microcontrollers :: 19 Aug 2005 16:06 :: komandara :: Replies: 3 :: Views: 375

manchester code encoding using assembly code for pic

does anyone has example of it?...
Microcontrollers :: 14 Aug 2005 14:57 :: Buriedcode :: Replies: 1 :: Views: 1359

how to write this vhdl program to convert codes??? thanks !

hello, i want to use nrz(non return to zero) for input,then convert to manchester code, how can i write this program ???any reference ? thanks !...
PLD, SPLD, GAL, CPLD, FPGA Design :: 16 Jan 2005 11:01 :: arunragavan :: Replies: 3 :: Views: 795

wireless digital audio, the saga continues...

hi,i posted several questions in this forum about a project of mine that ive been working on, on and off for about 2 years. its a wireless digital audio system for musical instruments. heres the rough specs..resolution: 16 bit. cs5330a adc, stereo, ...
Hobby Circuits and Small Projects Problems :: 29 Oct 2004 1:34 :: Buriedcode :: Replies: 0 :: Views: 378

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how to do 8b/10b enco/deco for clock signals in verilog/vhdl

hi friends...i have 3 clocks i want encode them... how can i encode them...8b/10b , manchester or pulse width ? how to do it in verilog/vhdl??jay...
PLD, SPLD, GAL, CPLD, FPGA Design :: 11 Oct 2004 2:18 :: ljkong :: Replies: 5 :: Views: 948

hardware design of 3mb/s point-to-point data link..

posted many questions in this board, and have received many useful replys. i thank you. heres my next problem.... :? basically ive designed a simple protocol on cplds for a 3mb/s data link using manchester encoding (1byte preamble, 2 bytes data,...
Professional Hardware and Electronics Design :: 31 Jul 2004 2:26 :: Buriedcode :: Replies: 3 :: Views: 471

cpld, wireless digital audio...

hi, i posted a similar question in the dsp forum, probably the wrong place to post it, no-one replied :oops: well, i have designed a system to convert an audio signal into digita, send this across some sort of wireless link (radio, ir etc..) and th...
PLD, SPLD, GAL, CPLD, FPGA Design :: 14 Jul 2004 18:31 :: Buriedcode :: Replies: 6 :: Views: 708

arinc 1553 in vhdl

hi,i search a 1553 bus controler core in vhdl, or all information whiwch could help to design this core.regards,ze_dib...
PLD, SPLD, GAL, CPLD, FPGA Design :: 23 Jun 2004 10:47 :: ramesh :: Replies: 2 :: Views: 828

mix two data lines?!

helloif you have 2 serial data lines with manchester encoding at 28kbps,how can i mix them and send it by one serial data line at upper speed like as 56kbps ?(at receive end ,i want to seperate it again and have the original 2 data lines)please help ...
Professional Hardware and Electronics Design :: 14 May 2003 16:55 :: 7rots51 :: Replies: 17 :: Views: 596

rf encoder/decoder

hi,i need to replace a holtek ht12d and ht12e with a pic 16f676, do you know source code for this ?thankstotue...
Microcontrollers :: 28 Apr 2003 18:30 :: gorkin :: Replies: 1 :: Views: 901

manchester encoding?

helloi need some info on manchester encode and decode.it is useful that someone describe the benefits of this method for transmitting data and its applications.bye...
Professional Hardware and Electronics Design :: 24 Apr 2003 0:46 :: gorkin :: Replies: 3 :: Views: 448

wireless speech comunication

my 433mhz walkie-talkie project summary: re rf project thread: http://www.elektroda.pl/eboard/viewtopic.php?topic=12087&forum=1&start=25&33after reading/researching and your help i know the following.i need a anti-alising filter after the mic to prev...
Professional Hardware and Electronics Design :: 28 Feb 2002 15:35 :: Encrypted :: Replies: 3 :: Views: 898

rf project

for my 3rd year project at uni i have the task of designing and building 433mhz digital low power walkie-talkies. i am looking for circuit designs in this area.i will be using qfmt5/qfmr5 fm radio modules. these will be connected to coders/decoders ...
Professional Hardware and Electronics Design :: 26 Feb 2002 14:47 :: steviemidnight :: Replies: 33 :: Views: 6312

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