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43oh

NJC

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Everything posted by NJC

  1. There are multiple ways to do FFTs, I think you could get one to run on the Value Line with a little bit of optimization, but it won't be easy. I would agree with the suggestions already mentioned, a using 3 bandpass filters is probably the best idea. I would recommend though using analog bandpass filters, then you can sample each channel to determine the power in each band. The last option is to use a different algorithm other than an FFT; there are algorithms which are very efficient if you are interested in looking for a certain frequency, but that would not be a viable option if you want t
  2. NJC

    Receive only uart?

    Sorry I missed out on the thread. Just wanted to make sure you got everything figured out. If not I can cut out the transmit part of the code for you. Let me know.
  3. NJC

    ADC10 Vs SD16?

    I know my response comes a bit late, but I have worked with both quite extensively in multiple applications. The biggest difference is what gatesphere mentioned, the vertical resolution (how many bit's the ADC is) is much larger with the SD16. There are many applications where 10 bits is not enough (for example, an EEG). The other major differentiating factor is speed, the ADC10 is significantly faster than the SD16; if I remember correctly the SD16 in the F2013 has a maximum sample speed of about 4kHz. Remember that the Sigma Delta ADCs oversample the signal by multiple orders of magnitud
  4. It's been a while since I have been able to get on, and everything looks great! I love all the changes you've made to the site and I'm real happy to see the unbelievable growth. I look forward to getting back involved again. Keep up the great work!
  5. I really like this project. Totally cool. :-)
  6. I highly recommended the iron on PCB etching method. I used it years ago, and it was amazing. I was able to get most SMT boards I designed made in a few hours with the exception of a few VERY small pitch components. The downside, you need a laser printer. Back in the day my aunt donated an old one that she wasn't using anymore. It had terrible resolution for normal printing, but more than enough for PCBs. http://www.dipmicro.com/store/PNPB This is the blue paper that you use to print the designs on. If anyone ends up wanting a tutorial or hints on this, I'll try to find the CD its back
  7. My first thought is that if your logic analyzer is showing the correct serial stream, it is the software on the computer that is going wrong. Have you played around a bit more with Realterm? It can be somewhat frustrating when using the LaunchPad's VCP. Make sure you have the right VCP selected, and make sure you make sure it's connected in Realterm. One good trick is to short the RX and TX pins on the LaunchPad together and make sure you can get the echo in your terminal. That would ensure that the software end is functioning correctly. Hope you can get it working.
  8. I just wanted to point out that even though TI is a huge company, they dealt mostly with industry and academic institutions up till the LaunchPad release. In industry you never use an eStore, you almost always go through a sales rep of TI, or go through a company like Newark or Digikey. They were completely unprepared and did screw up, but I think that they are working pretty hard to fix the problem. In the last few years, I haven't had a single problem with TI. They ship me all the samples I need within 3 business days. That being said, I am still waiting for my LaunchPad's that I ordered
  9. I try my best to break it down nicely. The post I specifically linked to builds off of other posts, so if you feel a bit lost check out the older ones. :-) And about asking questions, there no dumb question (unless its something which can be found using Googles "I'm feeling lucky"). I check out these forums often, and will do my best to explain any parts of my code which might not be clear. Let the questions flow. I'm writing up the last post for the oscilloscope project now, but after that's done I will be making a page with a list of past posts since I know how much of a pain it can
  10. Now that. Is awesome. The author does an awesome job showing which sources he used! I'm super impressed. I can't wait till I have time to delve through that. NJC
  11. Hey Bill, I have a blog which has some beginner guides. More pertinent, I have a post where I explain how to implement a half-duplex software UART. You can use this as a foundation for the rest of your project, once you have the processor receiving data you can start working processing it. http://www.msp430launchpad.com/2010/08/half-duplex-software-uart-on-launchpad.html Hope that helps, NJC
  12. NJC

    Resume

    gatesphere, as a fellow student I might be able to give you some good pointers. I've worked at 4 companies already (all over the world) doing all kinds of real engineering work. The key is to get your resume up and running, and remember its a work in progress, you won't have your resume perfect for a while, so you mine as well start now before you need a full time job. Second, even if you aren't looking for a job just yet, go to career fairs and show some companies your resume, maybe even do a few real interviews. It helps to not only get practice, but to see exactly what companies want.
  13. NJ/NY...good area. :-) (It's where I grew up) Welcome to 43oh! Hope we can help you out with any questions you have.
  14. NJC

    Resume

    So, I have already made my decision on what I will do, but I wanted to see what everyone thinks of resumes. Particularly, what is everyone's opinion on resumes that are larger than one page? Or about resumes in general. NJC
  15. When you say the transmitted data is wrong, and that it is sending garbage at the time of the "break" code, you mean the software UART? not the Keyboard? I've used the USI in SPI mode pretty extensively, but am not too familiar with the I2C mode. I do remember it being a bit difficult to get working, with all the registers needing to be set correctly. At first glance, I can recommend trying a few things. First, you don't need to clear the USISR register, it is done automatically. Second, I would recommend simplifying the code a lot, and verifying that you can get the I2C working by its
  16. NJC

    MSP430L092

    Yeah, turns out that they aren't programmable by the 2 wire interface, or so the data sheets seem to say. O well.
  17. NJC

    MSP430L092

    *Blink* :shock: Did I read that correctly? An MSP430 with both an ADC and a DAC????? Audio Projects incoming! Also, I wonder if these are programmable via SBW?
  18. NJC

    POV Text Display

    *Like* Definitely an awesome touch with the display. (I wish I there was an option to thumbs up, or like, anything on the internet, lol) NJC
  19. I should have mine in a week or so. I got an email saying there were shipping problems and it would take a bit of time for me to get a board. gatesphere, I have the same hesitation as you. I do not want my code on the cloud, most of what I will be working on with it is 100% private intellectual property of mine and I do not want it getting in the wrong hands. I definitely do not want to have to read through all their privacy polices to find out if I am really safe or not. Keep us updated on your quest for compiling with the offline compiler. PS: Don't take this as a downside for the NX
  20. bluehash, About last week I saw a HUGE increase in my blogs traffic. I guess the first real wave of shipments have gone out. It will continue to grow fast I think, especially as more boards are shipped. I went up from about 120 visitors per day, to about 180. Things are becoming very exciting! I guess I should try to push out that final post on the oscilloscope. Yay on the 50 members! :-) NJC
  21. Doc, No need to be jealous. I don't have a hot air gun, I just wish I did :-P. For those of you who are wondering, the convection over/solder paste trick actually does work if your careful. And gatesphere. I saw that Rubiks cube in there! :-P NJC
  22. NJC

    FFT in .NET

    I have seen it before. The question I have that keeps coming up which I can not find the answer to easily, due to the fact that it's impossible to Google anything about it (ex. "real time speed processing"), is how fast it is. The problem is that I need it to be amazingly efficient, I'm even worried C# will have too much overhead. Anyone have an answer who might have played with it? I might try it out over the next few weeks while I'm working on the hardware a bit more, I'll def post and let you all know how it goes if I do try it. NJC Update: Stupid me, I forgot to look on the fo
  23. NJC

    FFT in .NET

    Thanks for the responses guys. I've sadly resigned myself to writing my own graphics. I just need it to be responsive, not look pretty; hopefully I get it going in a few days. For now I've been testing things with http://uazu.net/bwview/. It's a very nice program, but does not do all I need it to in real time. NJC
  24. Happy belated birthday! :-) Sorry I missed it! Thanks for everything you've done here bluehash. It means a ton to a lot of us.
  25. NJC

    FFT in .NET

    This is a long shot, but I figured I would ask in case anyone has run into what I'm looking for. I need some sort of FFT library for C# that has graphics display components. I can write my own FFT if need be, and even use some of the ones I found online but I really do not want to spend time writing code to display the results in real time. I need to be able to see the history of the frequency analysis results in real time. Something like this: http://www.synthtopia.com/content/2007/ ... r-plug-in/ Making smooth graphics are really not my thing. In the next few days I'm going to st
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