Wednesday, September 1, 2010
plz help me out..
how to write vhdl code for pulse width and pulse repetation interval .
in case of pulse width we need to find the pulse width of the pulse
in case of pulse width we need to find the pulse width of the pulse
Saturday, August 14, 2010
Liao wong algorithm
which edges are to be considered as forward path and feedback path in a given graph for calculating longest path using liao wong algorithm.pl explain about ordering in binary decision diagrams ?
mcu or mp
even the mcu has the more advantage than the mp y don we use the mcu instead of mp in our pcs and labtops????
Losses of Bytes in TEMAC transmitting
We are targetting Spartan6 device.package is LX45.we want to transmit data through ethernet.But we are lossing bytes during transmitting.We are using IPCORE.Can any one guess the reason?
FELICS ALGORITHM
doing project in loss less image compression using VLSI oriented FELICS Algorithm help me to write code in Verilog.i need some ideas to implement
Friday, August 13, 2010
vhdl code to interface fpga with lcd
pl tell me the steps to be followed while coding or posting the code for interfacing a virtex II pro fpga with lampex lm16200 lcd.
cmos design challenges in the Nanotechnology era
please give me breaf description about cmos design challenges in nanotechnology era
Thursday, August 12, 2010
how to view layout in cadence virtuoso with lef?
I have LEF, DEF, LIB, PLIB, DB, etc. all files from SoC and such but no gds. These files are from ARM with general I/O and pad cell but I need to see them with virtuoso. One person told me maybe a synopsys function called fdi2gds on the lef file, but I'm not sure how to use it.
Timing constraints in XILINX ISE
pl explain me about timing constraints in xilinx ISE.
exactly wat am looking is how to apply timing constraints.
if possible explain brief description for counter/ff/or simple gates also.
xi
exactly wat am looking is how to apply timing constraints.
if possible explain brief description for counter/ff/or simple gates also.
xi
BUILT IN SELF TEST FOR RAM
could you please help me in how to find the code for BUILT IN SELF TEST OF RAM in vhdl language please help me
program for digital clock and stopwatch
i need the programs for digital clock and stop watch in microprocessors 8086 trainer kit
Monday, June 28, 2010
Constarint to the synthesizer
There may arise a situation when tne synthesizer is allowed to selcect either a multiplexer or an and-or gate. How to keep a multiplexer constraint to the synthesizer?
leakage power in submicron technology
help me to find the leakage power of a digital NAND gate in 90nm and 65 nm technology with a HSPICE program .kindly provide the model files for the MOSFETS.Let me know the threshold voltages ,length ,width of nmos and pmos in the 90nm & 65 nm technologies.
RICS processor
1. what is the factor that depends the clock frequency of a RISC processor?
2. how to increase the speed of aRISC processor?
2. how to increase the speed of aRISC processor?
spi slave
want to implement an spi slave block in VHDL and I have the following question:
Do I have to use the CSn (chip select signal) as an asynchronous reset of the SPI slave block?
I don't want to use any additional master clock in order to sample the SPI signals, but I want to use the SCK to clock my flops. So I want to reset the internal FSM every time the CSn is going high.
Is this a good way to implement it?
Do I have to use the CSn (chip select signal) as an asynchronous reset of the SPI slave block?
I don't want to use any additional master clock in order to sample the SPI signals, but I want to use the SCK to clock my flops. So I want to reset the internal FSM every time the CSn is going high.
Is this a good way to implement it?
verilog code
please provide me the verilog code for Path selector in Dual node interconnected SONET/SDH Ring for BLSR.
Number of Process Vs Simulation Time with VHDL
Does more number of processes in a vhdl design file have any effect on simulation time with Modelsim?
zero padding
i m designing an OFDM transceiver in xilinix system generator. i took data and modulated the data using QPSK. then before giving my data to IFFT i need to do its zero padding. my incoming data is at the rate of 800 samples per sec. i want to take 1st 400 samples and store them. i tried to use RAM of depth 400(i dont know i m right or wrong), then next 400 samples in another RAM. and now i want to add 224 zeros in between these two data samples of 400. My data rate has been increases from 800 samples/sec to 1024. How can i store this higher sample rate. and how can i implement my problem in system generator. can i use FIFO any where.
application programs
could u give me some application programs based on 8086 system..
some real time application software.
some real time application software.
Wednesday, June 16, 2010
Thursday, June 10, 2010
PCI interface
i need to interface with the PLX, any one is having any reference code or anything,plz provide and guide me.
Help for Code
I am doing a project and in that I need to pause my clock. The module consists of stretch, stop as inputs and clk as output. My module should be able to generate clock signal when stretch and stop are low. When any or both of them are high my clock should stay at 0 position. Can anyone help me with code please.
Saturday, June 5, 2010
Loading My Processor Using MIPS ABI
I'm trying to figure out how to load a program written in C++ onto a processor I've designed. The processor uses the MIPS I ISA and I wrote it using Verilator. This being said I have a C++ file that instantiates my processor module as an object.
The C++ file contains 2 arrays, one that represents instruction memory and another that represents data memory. I want to fill the instruction memory array with the instructions in my compiled binary file (made from a simple test program written in C++). To do this I require some knowledge of the MIPS ABI. I have the generic System V ABI and the processor specific MIPS32 ABI documents and I am attempting to determine where exactly in my binary file my program resides.
I need help figuring out exactly what instructions in my binary file I need and how I should use them. Can anyone supply me with some incite as to how I go about sorting through the binary I generated? I know I need the instructions that represent my sample program but what else do I need? The whole set of instructions or just a subset?
Anything will be useful, even redefinitions of my goals if need be.
The C++ file contains 2 arrays, one that represents instruction memory and another that represents data memory. I want to fill the instruction memory array with the instructions in my compiled binary file (made from a simple test program written in C++). To do this I require some knowledge of the MIPS ABI. I have the generic System V ABI and the processor specific MIPS32 ABI documents and I am attempting to determine where exactly in my binary file my program resides.
I need help figuring out exactly what instructions in my binary file I need and how I should use them. Can anyone supply me with some incite as to how I go about sorting through the binary I generated? I know I need the instructions that represent my sample program but what else do I need? The whole set of instructions or just a subset?
Anything will be useful, even redefinitions of my goals if need be.
: ELF Loader
I'm attempting to load segments of an ELF file into a c++ file array. I was told to look into ELF Loaders or libelf. Can anyone tell me what these are and how I can use them to load instructions from a binary file to a C++ file? This will all be used to simulate MIPS I processor.
error in accel dsp
n order to convert mat lab code into hdl code I have implemented accel dsp.
but after converting that code one file is missing named "pulse_gen".
just i have used inbuilt fir coding example which is given in the accel dsp example programs.
pl guide me?
but after converting that code one file is missing named "pulse_gen".
just i have used inbuilt fir coding example which is given in the accel dsp example programs.
pl guide me?
Thursday, June 3, 2010
vhdl code for floating point multiplier
give a code that will multiply one interger and floating point number so that result will be again in floating point number only.
Wednesday, June 2, 2010
Xilinx FPGA clock division for UART
I am using a Spartan3 Xilinx FPGA and I want to implement a UART module. The frequency of the crystal on board is 50MHz and I need to divide this frequency.
OK, one way is to implement a counter and use its output as a clock.
But in Spartan3 there are some specific clock generation modules that provides some advantages compared to the counters (clock tree routing, not much skew, phase shift and more..).
From what I saw, these modules cannot divide a clock frequency by more than 16.
Is there some way to use those modules (and not only counters) in order to divide the 50MHz clock with a bigger number (ie 256) and distribute it to the rest circuit?
OK, one way is to implement a counter and use its output as a clock.
But in Spartan3 there are some specific clock generation modules that provides some advantages compared to the counters (clock tree routing, not much skew, phase shift and more..).
From what I saw, these modules cannot divide a clock frequency by more than 16.
Is there some way to use those modules (and not only counters) in order to divide the 50MHz clock with a bigger number (ie 256) and distribute it to the rest circuit?
Transformerless power supply
How can i make transformerless power supply,which produces 24v,18,12,6,and 3v using a capacitor.
Monday, May 31, 2010
megit decoder
vhdl code to design a Meggit Decoder for the cyclic code (7,4) with g(x) = 1 + X + X3 .
Saturday, May 22, 2010
8 bit super register
I WANT A VERILOG CODE FOR UNIVERSAL REGISTER
It has 5 inputs: clk, data_in , control, data_sh_r and data_sh_l. The first input, clk, is the clock input where any new operation takes place at the rising edge of this clock signal. The second input, data_in, is an 8 bit input used to load a new data into our register. The third input, control, is a 3 bit input to determine which operation of the eight operations to be performed. The last two inputs, data_sh_r and data_sh_l, each is a 1 bit input used as a shift-in bit when shifting right or left respectively. The Register has two outputs. The first output is 8 bit representing the output data from the register, while the second output is a single bit which is ‘1’ when the output of the register is “00000000” and is ‘0’ otherwise.
It has 5 inputs: clk, data_in , control, data_sh_r and data_sh_l. The first input, clk, is the clock input where any new operation takes place at the rising edge of this clock signal. The second input, data_in, is an 8 bit input used to load a new data into our register. The third input, control, is a 3 bit input to determine which operation of the eight operations to be performed. The last two inputs, data_sh_r and data_sh_l, each is a 1 bit input used as a shift-in bit when shifting right or left respectively. The Register has two outputs. The first output is 8 bit representing the output data from the register, while the second output is a single bit which is ‘1’ when the output of the register is “00000000” and is ‘0’ otherwise.
Thursday, May 20, 2010
fpga implementation of reed solomon decoder
can anyone send me the vhdl coder using berlekamp massey key equation for decoder for synthesizing and implement on xilinx FPGA with virtex version-4 and series 35 along with explanation....
Saturday, May 8, 2010
nios based
i am doing the project in the DE2 kit of altera with SD card audio and PS2 keyboard.can anyone help me to make the code to send the input through the keyboard and view the result in LCDmodule
state space model of AC servo motor/PMSM motor
my project is to control the position of AC servo motor by sliding mode control so i want the mathematical model of AC servo/PMSM motor(3-phase) i m facing diffculty while generating the mathematical model actually i want to simulate the model in SIMULINK/MATLAB for that i required the [A][B][C][D] matrix or transfer function if any body already work on the same motor or any link regarding the same kindly send memy project is to control the position of AC servo motor by sliding mode control so i want the mathematical model of AC servo/PMSM motor(3-phase) i m facing diffculty while generating the mathematical model actually i want to simulate the model in SIMULINK/MATLAB for that i required the [A][B][C][D] matrix or transfer function if any body already work on the same motor or any link regarding the same kindly send me
PTM module in (*.pm format)
how to use PTM module card (*.pm format http://www.eas.asu.edu/~ptm/)for HSPICE... Because when i used finfet module card for 32nm ptm i got message pmos1 unfound eventhough i have done many attempt but problem presist( kept same name)
how to use BSIM3v3 for modeling mosfet
Tell me how to use bsim3v3 for modeling, since i have written my own mathematical equation and i wanted to modify bsim model card. how to extract parameter (which tools can be used to modify and extract the parameter? does Hspice or spectre support this )... however i have download bsim4 in c - code....
what are the symmetric signaling schemes
what are the symmetric signaling schemes,and
ddc-db
mj-sib
mj-db
asf-lc the above terms stands for
ddc-db
mj-sib
mj-db
asf-lc the above terms stands for
How to resimulate a verilog-A simulation?
I have simulated a verilog-A netlist using spectre.
I have the savetime file (*.srf) at 55us.
I want to re-simulate design from 55us to 100us.
While doing so, the verilog A models are giving wrong result.
Can anybody tell me how to re-simulate the design.
I have the savetime file (*.srf) at 55us.
I want to re-simulate design from 55us to 100us.
While doing so, the verilog A models are giving wrong result.
Can anybody tell me how to re-simulate the design.
guidance program
iwant program in "verilog" to giude amissile ,IF the input of target are none {Module Guidance(trgt_distination,trgt_velocity,angle).
THE MISSLE IS GOING ON{x,y}axis (that mean we used the Laws of linear motion )
(by using fpga )
THE MISSLE IS GOING ON{x,y}axis (that mean we used the Laws of linear motion )
(by using fpga )
how to implement vhdl coding on fpga
i am doing booth encoded wallace tree multiplier(32 bit) using VHDL/VERILOG .
but i don't know how to implement vhdl code on fpga board .
i am using SPARTAN 3E KIT (FPGA BOARD).
please send me the steps how to run the coding on fpga board FOR 32 BIT VHDL CODE.
but i don't know how to implement vhdl code on fpga board .
i am using SPARTAN 3E KIT (FPGA BOARD).
please send me the steps how to run the coding on fpga board FOR 32 BIT VHDL CODE.
Friday, May 7, 2010
Keypad Scanner & LCD
I am trying to program the FPGA such that it takes inputs from HEX Keypad & show the output on LCD. Ex. pressing 4 5 6 9 8 on Keypad should display 45698 on the lcd.
suggest me the logic or some sample codes in VHDl to guide me through..
suggest me the logic or some sample codes in VHDl to guide me through..
Matrix Mutliplication
i am planning to design the matrix multiplication,IF any one have the good material for this plz provide me.
Are real nos in VHDL synthesizable???
how to find the average and variance of 25 complex numbers in VHDL.the complex numbers are generated using matlab.I have 2000 complex nos of which i have to find average and variance taking 25 complex nos at a time.
In VHDL, are real nos not synthesisable??if so how should i convert complex no to STD_LOGIC_VECTOR..
pls help me in this regard...,
In VHDL, are real nos not synthesisable??if so how should i convert complex no to STD_LOGIC_VECTOR..
pls help me in this regard...,
Tuesday, April 27, 2010
how to set VCS MX environment variables
Pl.tell me how to set environment variables for VCS mX in easy way?
automatic room power control
I m working on automatic room power control. But the LDR sensors are not sensing properly. What can I use instead ? Can i use a seven segment display to display the number of members digitally.
Monday, April 26, 2010
gsm picocells
i want some info about gsm picocells
1-does gsm phase 2 support these cells?
2-what is the ip backhual?
3-picocells has its on bsc?
4-is there a hand over in these cells?
5-what is the antenna type which picocells connect to the network trough?
6-transmitting and reciveing equations and any other important equation.
7-limits operation voltage of the cells and curennt.
1-does gsm phase 2 support these cells?
2-what is the ip backhual?
3-picocells has its on bsc?
4-is there a hand over in these cells?
5-what is the antenna type which picocells connect to the network trough?
6-transmitting and reciveing equations and any other important equation.
7-limits operation voltage of the cells and curennt.
Keypad Scanner & LCD
I am trying to program the FPGA such that it takes inputs from HEX Keypad & shows the output on LCD. Expressing 4 5 6 9 8 on Keypad, should display 45698 on the lcd. suggest me the logic or some sample codes in VHDl to guide me
confuse
What is the relationship between the drain-to-source resistance rds and the channel length modulation lambda???
Variable as real
i have to find velocity with Quadrature decoded singnal. the equation is
velocity =(60*y)/(36*30), Where y is the count which is an integer variable.when i declare the velocity as "Real" i got compilation error message "non constant real variable cannot synthesize". how can i get fractional values of velocity?
velocity =(60*y)/(36*30), Where y is the count which is an integer variable.when i declare the velocity as "Real" i got compilation error message "non constant real variable cannot synthesize". how can i get fractional values of velocity?
low power consume
1.Which multiplier (array,baugh wooley,booth) consume low power
2.what is the power consumed by these multiplier, pls specify it seperately..
2.what is the power consumed by these multiplier, pls specify it seperately..
SAFER(Security And Fast Encryption Routine)algrthm
Is there any code for SAFER ALGORITHM in VHDL r in Verilog
32nm CMOS Models
I am conducting research about 32nm CMOS technology and I am searching for the model files that is compatible with Mentor Graphics Tools (Eldo simulator) level 53 or 54.
registergroup
Why registers B,D,H are paired with C,E,L registers respectively? why not any other group?
IEEE standard
help me in writing testbench for IEEE 1149. JTAG,boundary scan standard (Test access port)
cmos and bipolar technology
please help to get the answer of "compare the performance of cmos and biploar technologies",will be very usefull.
7segment
I need to display different numbers on the 7segments that are on the fpga according to the input I have. For example if I want to display the number 250, 2 on the 1st segment, 5 on the 2nd and 0 on the 3rd... How do I do it in VHDL pls?
Till now I am only capable of displaying the same number on all of the segments. My fpga is a spartan 3e-100
If anyone could help me I would really appreciate.
Till now I am only capable of displaying the same number on all of the segments. My fpga is a spartan 3e-100
If anyone could help me I would really appreciate.
punch through devices
What are punch through devices? What are there advantages? Is there any advantage if we use them as memory devices?
BJT vs. MOSFET gain comparison
for a mosfet in common source configuration
voltage gain A_mos = -gm*(ro||RD||RL)
and for a BJT in common emitter configuration,
A_bjt = -gm*(ro||RC||RL)
where, ro = output resistance = VA/IC or ID, VA=early voltage, IC=bias collector current and gm =transconductance parameter
considering RC=RD and load, RL to be the same, what can be said about the relative values of A_mos and A_bjt. What would be the comparitive relation between the values of gm and ro of both devices in general.?
voltage gain A_mos = -gm*(ro||RD||RL)
and for a BJT in common emitter configuration,
A_bjt = -gm*(ro||RC||RL)
where, ro = output resistance = VA/IC or ID, VA=early voltage, IC=bias collector current and gm =transconductance parameter
considering RC=RD and load, RL to be the same, what can be said about the relative values of A_mos and A_bjt. What would be the comparitive relation between the values of gm and ro of both devices in general.?
Current Mirror vs. Current Source
Please explain to me the difference between a normal current source and a current mirror(using Mosfets or BJTs).. What advantage does a current mirror offer over a normal current source. Why cant we directly use the reference current used in current mirrors for biasing or other purposes. is it because of lower output impedance that a Mosfet offers and thus lesser dependence of output current on load..??
Priority resolver in PIC
PL.explain about the principle of priority resolver or an circuit example of priority resolver?
Dflipflop
how to find the next bit when there is given a sequence of bits for a given hardware where the hardware is a four bit d-flipflop asynchronous system
Generation of .tcf file
suggest me how to generate the .tcf file which is needed for dynamic power analysis in Cadence RTL Compiler tool.
Monday, April 5, 2010
7segment
I need to display different numbers on the 7segments that are on the fpga according to the input I have. For example if I want to display the number 250, 2 on the 1st segment, 5 on the 2nd and 0 on the 3rd... How do I do it in VHDL pls? Till now I am only capable of displaying the same number on all of the segments. My fpga is a spartan 3e-100. Anyone Pl help me.
punch through devices
What are punch through devices? What are there advantages? Is there any advantage if we use them as memory devices?
Sunday, April 4, 2010
Current Mirror vs. Current Source
Please explain the difference between a normal Current Mirror vs. Current Source or BJTs).. What advantage does a current mirror offer over a normal current source. Why cant we directly use the reference current used in current mirrors for biasing or other purposes. is it because of lower output impedance that a Mosfet offers and thus lesser dependence of output current on load..??
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