A garage sale for your mind

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tech

A collection of 147 posts

NAS

My Western Digital NAS arrived this afternoon. It didn't take long to get it all RAID-0 configured. "Fatty" seemed an appropriate name for the 8TB beast (4 x 2TB). Hopefully one day that amount of storage will seem inconsequential. I'm still waiting on that

Precedence Madness

Why does == have a higher precedence than &? It took me forever to figure out why: if (value1 == value2 & mask) wasn't producing the expected result. On a whim I forced the order of operations to: if (value1 == (value2 & mask)) and that's when I realized

iPad Fail

While in Seattle I subscribed to the 3G service for my iPad. It worked beautifully. And the moment the wheels of the plane touched down in Atlanta, I turned on the iPad. Minutes later, and then hours later, it still had no data service; no Edge and no 3G. AT&

Perforce Sucks

Seriously. What's the deal with Perforce? I have a local "workspace" which is all of the source code files, but the Perforce client sets them all to read-only. If I want to edit one of these files I have to manually check it out with the

Fidelity

Fidelity in relationships is important, and as such I've committed to not looking at another iPad prior to receiving mine (sometime late this month); and insofar as it is possible, not looking at another iPad. Here's to testing the limits of human will power. Maybe I&

Flash

Flash is dead to me. And thanks to the work of dedicated developers, Flash can be dead to you, too - with the help of Click2Flash. If you use Safari. I'm sure help exists for FireFox, too.

Spectrum Analyzer [005]

I spent the better part of a week working on demodulation - but I haven't produced any sound yet. It's difficult to get straight, concise and understandable information on exactly how to filter and demodulate. So, I went back to working on the UI. You can

Spectrum Analyzer [004]

I put AM demodulation on hold for a moment and moved some code around so that I can better support demodulation later. In the new system (there's no point in dwelling on the particulars of the old system), the device read thread passes a newly received block of

Spectrum Analyzer [003]

My original, ill-conceived notion for drawing a waterfall display was to do a bunch of CGContextFillRect() each drawing a 1x1 rectangle. 1024 pixels wide * 250 pixels tall * redraw-rate = millions of 1x1 rectangles per second. Yeah, that didn't work at all. So, I made a second internal representation of

Spectrum Analyzer [002]

I've had current (red line), average (green fill) and max (blue fill) correctly drawing for a while, but it's taken some time to get the scale (in dBm) right. And I'm still not accounting for gain associated with the window function and the fft.

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