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PTB

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  1. 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
  2. I think TI have a typo in their documentation. One doc says 12000 and another says 1200. I'm betting on 1200
  3. Bad USB cable?
  4. 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.
  5. 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
  6. 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
  7. Hi, Just wondering if there is any errr... Feedback from Ti on our feedback. Cheers Ptb
  8. 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
  9. 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 an Arduino, but not with any of the TI chips. I have looked at the Launchpad schematics, but am more interested in the minimum it needs to run. I'm a bit of a numpty when it comes to this stuff. Forgive me. Maybe provide template kicad/eagle schematics with the minimum requirements and the hobbyist can add their extra circuitry to that and make their own boards. 3) I like the cloud tools page. Some nice things in there in an uncluttered easy to find location. https://dev.ti.com/ 4) Really like energia. Its got some issues, but full credit to the guys undertaking the mammoth task of progressing it on many fronts. I promise I'll learn CCS one day.... honest. And as always.... thanks to Blue# for the site. Cheers PTB
  10. I think it is under LM4F
  11. 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
  12. http://forum.43oh.com/topic/3980-reflow-oven-booster-pack/
  13. 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.
  14. 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 are popping off those ports as listed in post above. The reason I want to run both those events at the same time is I wish to fire off a timed sequence of flashes and measure the resultant combined flash pulse of that sequence. The goal is to confirm the timed delay settings are correct and have aligned the flash pulses. Aligning the pulses will remove ghosting from the photographic images. This generally applies to mixing different types of flashes. I could buy several flashes of the same type and set them exactly the same. But where would the fun be in that Thanks PTB
  15. 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) Moved design from Eagle to KiCAD Schematic Iridium Schematic.pdf e) I added a digital pot in an endeavour to make the light sensor auto-ranging for light levels. I failed on many fronts here. Firstly I screwed up big time on the chip socket. I somehow got a 18pin part in the board layout from a 16 pin part in the schematic. I only found out when I went to plug in the chip and the socket was too big. Nice work on my part. I am looking into making a small adaptor board to use the 16 pin chip in the 18 pin socket. Secondly, my thoughts of desensitising the phototransistor via programmable resistance appears futile anyway because the problem is actualy the phototransistor saturating. Adding resistance as per the circuit isnt going to help on that front. Did a bit of research on professional lightmeters and it would appear they cope with the problem by putting different strength filters on their light sensors and then you read off a different scale depending on which filter is in there. f) And lastly but certainly not leastly. @@Fred made me some awesome laser cut panels for the new design. These are sensational. I added some infill to the laser engraving and it looks better than the photo appears. Software ======== Lots of minor tweaks and improvements. Code updated to Energia 15. One of the really annoying things was misbehaviour of Some of the GPIO's It appears wire.begin(); screws up GPIO PD0 and PD1 I can turn pins PD0 and PD1 on and off at will until wire.begin(); is executed. After that PD0 is stuck Low and PD1 is stuck high. Fixed with info from this thread..... http://forum.43oh.com/topic/7421-new-energia-release-0101e0012-03202014/?p=60448 Thanks to @reaper and @@spirilis for that thread. And thanks again to @L.R.A for getting fast analog read back for me in Energia 15. Current Version 0.40 Here Iridium_v0.40.zip This code is very much a work in progress with lessons constantly being learnt. Still Working On ========== Investigating using timers instead of loops to trigger sequences. Cheers PTB