is there someone having 2812's UCOS SOURCE CODE?

Digital Signal Processing

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  • 1. confusion with Q format and ADC's
    Hi, I want to compute an fft using a microcontroller with a hardware multiplier. I saw an application note from maxim which stated that the fft inputs and outputs are in Q format. If I get the samples from my ADC in 2's complement format do I need to convert that into Q format to do the computations? thanks, djt294
  • 2. Dispersion modeling
    Hi All, Would anyone have any idea how to model dispersion such as present in transmission lines with the use of digital filter. In principle dispersion is frequency dependent time delay (so it can be assocaited with group delay or phase delay) and results in nonlinear phase characteristic of filter. At the moment I am trying to implement IIR all-pass filter that represents nonlinear phase behaviour, would it be correct approach? I read somewhere on the web that this can be implemented as fractional delay filter but how? Any thoughts? All the best Pawel
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    Hello all. Let me say that i've learn a lot reading this articles. I'm designing a system that will (hopefully) sample an IF signal and decode it (AM, SSB, etc). At present I have the code in place to downmix it and downsample to 31 Khz fs. No problems here. After this step I whould like to low-pass filter it using a IIR elliptic filter. I've designed the filter (8th order), but after I apply the filter the amplitude of the signal get's real small, even for signals that are inside de passband. The amplitude of the signal before entering the filter are from -1 to 1, and after they are ranging from -0.004 to 0.14 inside the passband (yes, I have a small ammount of DC in the signal, but that's normal). The question is: why does this happen ? The response of the filter should be near 0 dB at the passband. I can post my matlab code, but it's a bit messy. Thanks in advance. Cesar PS - By the way, this is a hobby for me. Not homework nor a fancy commercial project.
  • 4. Saving a matlab plot as an image help
    Hi everyone, I have a matlab related quetion which can seem simple but it's taking me ages. I am plotting an x and o over an image and I want to save that image whith the same size as the original one. This is what I mean: figure, imshow('data0002.tif'), hold on, figure,plot(Z{2}(1,:),Z{2}(2,:),'rx',hat_X{2}(1,:),hat_X{2}(3,:),'co') With this command I manage to do that, the problem is that after that I want to save that plot as tiff image same size as data0002. I've done that before using imwrite but this time I am not sure how to do it. I want to get rid of the white borders that matlab figure creates. Any help will be appreciated Jimmy

is there someone having 2812's UCOS SOURCE CODE?

Postby Wenhui Pan » Wed, 15 Dec 2004 19:29:33 GMT



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Hi all,

This is regarding flashing a code in 2812 processor from TI. I tried
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