## is there someone having 2812's UCOS SOURCE CODE?

Digital Signal Processing

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• 1. FFT window question
A sliding window FFT analysis equation: Y(lamda,k) = \sum_{mu =0}^{L-1} [y(lamda*R + mu) * h(mu) * exp (- j*2pi*k*mu/L)]. (A) Here,R is frame shift and h refer to the window. Rainer Martin said: Furthermore,to facilitate our notation and to avoid unnecessary normalization factors we assume \sum_{mu =0}^{L-1}( (h(mu))^2) = 1 ; (B) I wonder that how the equation B can reach the idea " to facilitate our notation and to avoid unnecessary normalization factors " ? some maybe useful hint: the subsequent work is to optimally smooth the spectra ,and then to get noise estimate in terms of mimimun statistics. Regards HyeeWang
• 2. Can a binary signal be cyclostationary?
I was reading this post and found your comment on cyclostationary. My understanding of cyclostationary are signals that there statistical measurements are periodic in time. From my understanding also, this cyclostationary feature appears on "modulated" signals due to the built in periodicity in the carrier. However, I am not sure if a pure binary signaly after demodulation is considered as cyclostationary, most digital communication books assume the binary source as a random normal distribution (stationary process). Do you agree with me on this point or you think I am missing a point?
• 3. deconvolution in frequency domain
hi please help me on this x(t)=sin(2*pi*10*t); w(t)-->awgn noise y(t)=x(t)*e(j*w(t)); here x is multiplied with e(j*w) in time domain. that is equivalent to convolution if frequency domain how to estimate e(j*w(t)) using deconvolution in frequency domain?

### is there someone having 2812's UCOS SOURCE CODE?




Hi,

I was asked to do some research on this "hamming code" and compare its
efficiency with huffman coding? But i remember from my class and
context
book, hamming code is some kind of error correction channel coding
scheme.
As I right? if yes, how can I compare the efficiency of a channel
coding to source coding? I have already thrown away all my knowledge
from classroom.

Thanks


Hi,
I am trying to setup a 2812 to take A to D readings. I have the ADC
and to branch to the ADC interrupt at the EOS (end of sequence). When
the program branches to the interrupt routine, I read and store the
result registers to variables. My problem is that the result registers
never change their value even when I vary the applied signal between 0V
and 3V. Any suggestions? Also, I have the ADC set to suspend mode0
where an emulation suspend is ignored (i.e. the ADC continues to sample
even when I hit a breakpoint?). Would this have anything to do with it?
Alex



Hello !
Would someone be able to explain me how to calculate the execution time o
a
NOP instruction when it is executed into flash and into external ram of
DSP
TI 2812?
Is it normal to have a time more important (2*) into ram than into flas
?
Is it normal to see that a change into the configuration of XINTF doesn'

change the execution time ?



Hi all,

This is regarding flashing a code in 2812 processor from TI. I tried
flashing a sample code from spectrum digital using the SDFlash
utility. I was able to flash it a couple of times, but after that it
was consistently showing errors in flashing. Actually the probelm was
with locking and unlocking the device using CSM.

The important point to be noted as far as flashing is concerned is
that the device has to be reset once ( soft reset thru the SDFlash
utility ) and then flashed, but not the reverse. In case u accidently
reset the device after flashing, it places 0000 in all the password
locations and locks the device permanently and after that ur device
cannot be debugged or reprogrammed. In case u r using an eZDSP kit
continue working with onchip and off chip RAM, but secure RAM