Comments for Silicon Sparrow

Comment on Parallel Port Tester in Python by Adam

Adam — Tue, 10 Apr 2012 03:03:41 +0000

Hi Adam, sorry to take so long to reply to your comment, I get so many spam comments that it takes me a while to delete them all and find the genuine posts.

This is a problem with inpout32.dll, my first thought would be to check that you are running on a 32-bit system. If you have Windows 7, you might try inpoutx64.dll available here:

http://logix4u.net/index.php

or just see if there is a newer version of the 32-bit DLL here:

http://logix4u.net/parallel-port/16-inpout32dll-for-windows-982000ntxp

I’m sorry that I can’t really diagnose your problem much further than that. The makers of inpout32 know this stuff a lot better than I do.

Good luck with your project.

Comment on Parallel Port Tester in Python by Adam Dioguardi

Adam Dioguardi — Thu, 29 Mar 2012 22:11:45 +0000

Hi Adam,
I found your LPT tester while googling a problem that I have with some software that we have inherited to control stepper motors. inpout32.dll keeps throwing an exception when I call it with ctypes.windll from python. I figured I would try your program as well since we are using similar methods, and it gave the same error:

Traceback (most recent call last):
File “C:\parbufftest\portmon.py”, line 126, in
myframe = MainWindow(None, wx.ID_ANY, ‘Parallel Port Monitor by Adam Pierce ‘)
File “C:\parbufftest\portmon.py”, line 73, in __init__
self.UpdateStatus()
File “C:\parbufftest\portmon.py”, line 97, in UpdateStatus
d = ctypes.windll.inpout32.Inp32(0×379)
WindowsError: exception: priviledged instruction

Any ideas? User privileges maybe?

Comment on UI Horror Story of the Day by JosephK

JosephK — Mon, 13 Feb 2012 05:15:54 +0000

Thank you. I thought I was the only one who thought this was the most ridiculous, mind-bendingly, annoying design. But given Microsoft’s poor attention to help systems in the past, it doesn’t surprise me.

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.