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Recent content by philoman

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    interfacing rs232 using matlab (fread command)

    It seems that MatLab ignores the MSB or force it to be zero. If you create serial port object with correct configuration, you can slow down the baudrate and try again. In my project, it works fine with 8-N-1 and 9600.
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    Bandpass Filter - Simulink

    The freq of the "sine wave" you specified is wrong, which should be 5e3*2*pi, 10e3*2*pi, 15e3*2*pi, remember that w=f*2*pi. All the blocks needed to simulate a bandpass filter can be found in library Simulink and Signal Processing Blockset. My model is uploaded for reference. You may need to...
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    FFT processor for microphone signals below 150Hz

    According to Shannon&Naquist sampling theroy, the sampling freq should be at least twice of the bandwidth, which is 300Ksps in your case. The freq resolution is calculated as Fs/N, in which Fs is the sampling freq and N is the number of the FFT points.
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    simple questions in Xilinx ISE 11

    ISE Project Navigator is a good start point for vhdl/verilog design entry, and ISim can be invoked by clicking corresponding icon in processes panel, if you have changed the "Source for" to be Simulation.
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    how to buffer a clock?

    If clkfx is selected as one of the DCM's outputs, you can specify either the output frequency or M/D values according to your design. If you want clkfx output the same frequency as clkin or if you specify the clkin freq as the output frequency, the M and D will be both set to 2(the min...
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    Constraints and others settings are not saving in Allegro 16

    Is the database locked in 15.7? you check it by "File->Properties".
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    Allegro board outline

    you can also use Add->Line to add/change board outlines, you can change the "Line Lock" to "line 45" or "arc" in the Options tab of the Control Panel.
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    how to buffer a clock?

    well there are two types of dcm outputs, DLL and DFS. clk0 is one of the DLL outputs which is of the same frequency as the input reference clock. clkfx is one of the DFS outputs whose frequency if calculated as fin*M/D, fin is the freq of ref clock, M is the value of CLKFX_MULTIPLY attribute, D...
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    program for to read and write data from pen drive using pic

    well, as far as i know, ft245 is a host to peripheral interfacing chip whose usb side is connected to a host computer instead of a usb device, pen drive etc.
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    4 logical confusing question for me..help me if u can...plz

    1, ... 2, most of the power loss on the supply line is converted into heat and formulated by Joule's as Q=I^2*R*t, and P=I^2*R represents the rate of heat dissipation. In the context of resistive circuits where the Ohm's is applicable, P=I^2*R=V^2/R. In more general cases, P=V*I is always...
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    Input Duty Cycle in XILINX Virtex5 FPGA

    Well, you can set the DCM's DUTY_CYCLE_CORRECTION attribute to true. Refer to Virtex-5's user guide ug190 and search 'duty cycle correction' for more details.
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    FPGA based OFDM modulator - need VHDL programming of OFDM

    OFDM modulation/demodulation is implemented by FFT/IFFT, so what you need is to implement a fft ip core. Xilinx FFT 7.0 may be the choice.
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    Coregen from xilinx ip core it doesn't show the code

    coregen...ip cores???? Well, it depends on your design flow. For example, you can use VHO as a instantiation template file in a vhdl desing flow. After instantiating a core in your ISE Project Navigator project, you may also want to add the core (XCO file) to you project, which will lit up...
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    Angle of Arrival AOA/DOA Help

    DOA means Direction of arrival. In a planar array, DOA indicates both elevation and azimuth angle. But in a linear array, which is mostly the case, direction is estimated in a two dimensional plane, the angle can be either azimuth or elevation, whatever. To estimate AOA/DOA, you need to know...
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    How to interface PORTs using MATLAB ??

    with instrument control toolbox installed, matlab can commumicate with many devices, such as serial/parallel ports, ethernet, GPIB and so on. refer to Mathworks' site for more details, or type "help instrument" in matlab command window.

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