Comments for Silicon Sparrow

Comment on Solved – CDHtmlDialog and bitmap resources by Abishek

Abishek — Wed, 23 Nov 2011 08:17:49 +0000

Hi,

Very Nice.

Thanks for posting this.

Comment on HTC Desire HD Freeze Bug by BlueRiver

BlueRiver — Fri, 21 Oct 2011 19:10:48 +0000

I’ve never had the bug ever since I bought the phone with 2.3.3 in April, but today i’ve had three freezes and restarts in one day!

I’m going to try this usb debugging thing and hope for the best :<

Comment on How to FFT with NXP’s DSP library by Adam

Adam — Thu, 20 Oct 2011 20:34:09 +0000

Isn’t this the same question you just asked?

I haven’t pushed it to see how fast it will go but in my opinion 2MHz will be too much for this chip running this FFT library.

Comment on How to FFT with NXP’s DSP library by sam

sam — Thu, 20 Oct 2011 17:05:35 +0000

thank’s for your answer.
i want to get fft from 2MHZ signal and it is not possible with internal ADC so i’m going to use AD9225 .
is cortex m3 suitable for this work? is the speed of cpu enough?
regards.

Comment on How to FFT with NXP’s DSP library by Adam

Adam — Thu, 20 Oct 2011 01:05:58 +0000

Well I was using it on an LPC1768 with it’s own internal ADC. My project only needed to analyze frequencies up to 2.5kHz and it did that easily with plenty of CPU cycles left over for the application software.

I don’t think it would make much difference whether you use an external ADC or not because the data still has to be copied into RAM.

As for the maximum frequency, I haven’t tried it but I think you could probably go up to 15kHz, maybe more if you optimized the code a bit such as removing the square-root function or using the on-chip DMA to do some of the memory transfers.

Let me know how you go with it.

Comment on How to FFT with NXP’s DSP library by sam

sam — Wed, 19 Oct 2011 20:47:34 +0000

hi
in your opinion if i use external ADC and lpc1768 what is the max frequency that i can use fft function?
regards.

Comment on How to FFT with NXP’s DSP library by Adam

Adam — Wed, 12 Oct 2011 12:31:04 +0000

That totally depends on what development tools you are using. I use GNU tools and so I just add “-lNXP_M3_DSPLibFft” to my linker options. If you use a graphical IDE such as Keil or Eclipse, there will be something under the project options menu to add additional libraries to the project.

Comment on How to FFT with NXP’s DSP library by Ricardo

Ricardo — Fri, 07 Oct 2011 14:09:47 +0000

how do I add NXP_M3_DSPLibFft.a to my project?

Comment on Circuit Sketch Proof of Concept is Launched by Adam

Adam — Wed, 08 Jun 2011 22:50:36 +0000

Thanks for the compliment. The site is still pretty wobbily and will improve. One of the features I would like to add is the ability for users to create their own symbols.

But for now, I have added a battery symbol for you.

Comment on Circuit Sketch Proof of Concept is Launched by Micah S

Micah S — Tue, 07 Jun 2011 08:27:51 +0000

Very nifty! Could you add the symbol for a cell/battery? This would make it very useful for my physics/physical science classes.