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PTB

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Everything posted by PTB

  1. Interesting. I too would be interested to know if it is energia friendly.
  2. PTB

    Noise in ADC

    Hmmmm then I'm out. That's all I got. Does kinda sound like a bad batch.
  3. PTB

    Noise in ADC

    Are the good ones and the bad ones using the same power supply? I was getting "wobbly" adc readings due to a cheap power supply. Problem went away when I used a more quality power supply. In my case an iPhone charger. Cheers PTB
  4. Every time I look at this project I can't help but think what an amazing job you have done on every aspect of this. Especially the hardware. Outstanding !! Cheers PTB
  5. I think TI have a typo in their documentation. One doc says 12000 and another says 1200. I'm betting on 1200
  6. You could also use some kind of external storage. If the data isn't too much you could store in an external eeprom chip. I2c or spi. Alternatively you could use an sd card.
  7. I got a lot of help for stellaris in this thread here. Very similar to Tiva Might be of use http://forum.43oh.com/topic/7153-stellaris-fast-analog-reads/?p=65472
  8. Hi, This might be an idea. http://ams.com/eng/Products/Magnetic-Position-Sensors/Angle-Position-On-Axis/AS5048A I have bought some of these with a view to a future project. Haven't started yet due to no free time. They sell a reasonably priced adaptor kit and an expensive demo kit. There's a library here. https://github.com/ZoetropeLabs/AS5048A-Arduino Might be of use ...... Might not. Cheers PTB
  9. Hi, Just wondering if there is any errr... Feedback from Ti on our feedback. Cheers Ptb
  10. I think there is some kind of limit. I found anything over 4gb got pretty funky. I tried a few different cards and they all misbehaved. I know the cards are good as they all work fine in my dslr camera. I'm not using sd.lib but rather petitfs. Same problem though. I found some 4gb cards on sale and bought a handful. Cheers Ptb
  11. Just my 2c for what its worth. 1) Yeah... me too on the international postage. Its a bit of a show stopper for me. I've gone to order a few things and then its "oh yeah that's right... forgot about that" and cancel the order. It was crazy cheap before. Maybe somewhere in the middle ground would be sustainable from both customer and providers point of view. 2) The info may be out there and I haven't been able to find it but it would be great to have some real basic info for moving a project from a Launchpad to a standalone bare bones circuit without an actual launchpad. I can do it with
  12. Nice ! Well deserved man. This site is the reason I got into TI Microcontrollers. You've created a great environment that has attracted some really knowledgeable and helpful folks. (And thanks again to all those guys by the way). Congratulations on the award. PTB
  13. http://forum.43oh.com/topic/3980-reflow-oven-booster-pack/
  14. And here are some example flash curve images, both single flash and multiple flash. The curves with multiple flash are currently only possible by using two of the circuit boards and two launchpads. One for measuring and one for firing off required sequence.
  15. Hi L.R.A Here's a link to the project thread I am working on. http://forum.43oh.com/topic/7346-stellaris-launchpad-camera-flash-timer-and-measurement-tool/?p=65887 I just added an update to help paint a better picture of what I am doing. Basically it is a flash timer and flash measurement tool. Currently I can get it to fire a user defined sequence or I can get it to measure a photographic flash pulse. But I cant get it to do both at the same time. I am hoping timers will help me with that. My plan was have the main program handle the Analogread to array while the timers ar
  16. Thought I would post an update on this project to help paint a picture with my other questions in other threads. Hardware ======== I have gone to a new board layout which utilises the following new features. a) ULN2003 Darlington arrays to drive the leds. The old arrangement didnt have enough grunt to drive the leds off the mcu. Separated the bi-colour LEDS into separate discreet leds. Blue for Focus and Red For Shutter. c) Returned to 3.5mm Audio jacks instead of RJ45 jacks. Easier to get off the shelf cables. d) Added an extra booster pack set of pins in parallel. e)
  17. +1 to what cubeberg said. I had a noisy wall wart that would make my analog readings look like an earthquake seismograph. Might be that. Might be something else.
  18. Hi Guys, Another learning experience for me. I'm toying with the idea of implementing timers into my project which uses the STELLARIS launchpad LM4F. I've never used timers before so the questions are going to be pretty dumb. I think due to the choices of pins I have used, I may not be able to do it. I have 8 ports set to trigger in a sequence. The ports I am using are as per below and I suspect I may not be able to use timers due to using ports PA4 and PE1. I got the info from page 665-666 in http://www.datasheets.pl/integrated_circuits/L/LM/LM4F120H5QR.pdf Flash # Port Pin Name
  19. Hi Rob, I have a few of the early LCD Booster Packs. Love 'em. Have never used the sd card slot on the booster pack as I have one elsewhere in my project. If I was redoing it from scratch I would forego my sd card socket for yours. I think it should definitely stay. Its such a nice to have. Two booster packs in one Great for data logging. I'd be happy to pay a little extra to save extra hassle implementing elsewhere. Be nice to not have to worry about soldering it. Cheers PTB
  20. L.R.A. You are the man ! Its working. Number of Samples : 255 Sample Starttime : 3143376 Sample Endtime : 3143888 Sample Array Set Duration time in microseconds : 512 ======================= Now this is only 0.5 MSPS instead of 1 BUT.... the old code would sometimes do that anyway. Sometimes it was 1MSPS sometimes it was 0.5MSPS. At least now its consistent. 1MSPS would be obviously nicer, but this is still pretty great. I will splice this back into my main code and see how she goes. I'll do further project based posts in another thread. I've made some priceless
  21. L.R.A. I appreciate your help. I'll keep having a play. Its all kinda bizarro as it ran under energia 9 and 10. Cheers PTB
  22. Hi L.R.A. I may have misinterpreted what you were saying. I disabled the line you mentioned in the init routine and replaced it with those last 2 lines. unfortunately it hangs at the same spot. Was that what I was supposed to do ? This HWREG stuff is definitely outside my skillset. Cheers PTB // // LM4F_ADC // A Stellarisiti Collaborative effort // JKabat, Rei Vilo, reaper7, PTB. // // Include application, user and local libraries // Define variables and constants /// /// @file Fast_Analog_Read.ino /// @brief Main sketch /// /// @details Fast Analog Read Investigations
  23. @L.R.A. Hi L.R.A. Thanks heaps for looking into this. Goodness that code has gone to the dogs. It wasn't like that when I left it.... honest Just reposted and it looks alright at the moment. I must have wrecked it when I edited a typo the other day. I'll give that suggestion a crack tomorrow after work and see what happens. Thanks again for looking. Cheers PTB
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