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asgard20032

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Everything posted by asgard20032

  1. So sqrtf from AVR libc would be more optimized? Or maybe the sqrtf from AVR libc is hand written in assembly///very compiler optimized, while the one from arm newlib is written in a generic way
  2. Could someone explain why an emulated double on msp432 would be slower than an emulated double on arduino? Maybe it has something to do with wait state and pipeline? Arduino being a single cycle zero wait state with a very simple pipeline, so in a loop, the pipeline don't slow thing down. For m4, i don't remember if it has pipeline optimization in loop, but zero wait state is probably what slow thing down.
  3. Wait, wut? We now have color tv in canada? I am going to the general store right now to buy one. EDIT : In the manual, it say to plug it... what does it mean? They are talking about something called electricity in the manual, is it black magic?
  4. Do you live in an igloo? What about beaver? And woodcutting? Do you have color TV? DO you have a pet polar bear? well i also live in Canada...
  5. I didn't run into code size limit with msp430, because i don't use them often (i only used it once in my final project). But if i could use them without code restriction, i would use them as my favorite one. The problem is not for code size, but more for data size embedded in code size, for example, string and pixel array for font and bitmap used for any display.
  6. On Tiva, rom function is less useful for our licensing problem, since when used with an XDS100, its free. Since there is apparently no driverlib on msp430, then we are hit hard by the code size limit. On msp432, the on board driverlib help us to get more from the size limit imposed.
  7. Well, it was not intended to be a good point, i was just trying to remember which mcu had on-board rom with function. I know that NXP has some mcu with on-board ron USB stack. Any other manufacturer has mcu with embedded function in their rom?
  8. Thats a good question, i never really understood how to find camera to be interfaced to mcu. If someone could explain me how to search for one... What term to use for search, website to buy some, which one are easy to solder/interface...
  9. I would never use a camera with msp430 (and maybe not even a color display)... Really, an ARM cortex is better suited when it come to GUI, display and camera and storage (SD card).
  10. Well, for every mcu a hobbyist/student may use, so every msp430 excluding industrial one (i think its w series), every arm mcu (excluding safety serie), the arm used in beaglebone, CC with an arm or msp430 core, and lastly, the lower end of their dsp series. With the exception of the DSP and arm safety used in the launchpad. They could call it CCS light edition, or CCS entry edition.
  11. The reason why a hobbyist would want to use TI compiler instead of gcc is to avoid bug in gcc (there are still some bug in GCC for msp430, especially for extended architecture 20 bits), because most of TI example are for their own compiler, and most of their library are written for their own compiler. Although, for many of their example/library, there is only minor modification needed to compile under gcc, for a hobbyist learning mcu.... messing with compiler specific thing is outside his learning scope for now. Also, TI compiler generate more optimized code.
  12. EDIT: its 495$, i was reading the wrong thing What is 495$? I see 159$. I think we will have to wait a few hour/day for TI to adjust the pricing/info on the website to reflect their new policy. It will finally be more adequate for student like me to buy CCS. At around 100-200$, i might consider buying a license for development on msp430 & msp432 & CCxxx platform, and buy a crosswork for all my arm related work (although they don't offer lifetime upgrade, they are still affordable. One of the great thing of this CCS offer is one low-medium price = lifetime upgrade, no limit, commerc
  13. Interesting, maybe i will get one... but is it worth to get such device if i will buy a saleae logic analyzer? Now i just need to get a RF analyzer (i missed that big TI discount on that cc430 based rf analyzer)
  14. What is C: ? You know, we are talking about real OS here, so there is no such thing as C:. Also, GNU/Linux + Any decent filesystem (so not NTFS or FAT) support very very very very very very long path. We could say the path length could be unlimited, the only restriction is on the file name must not be more than 255 character.
  15. Bad point of C2000: - Price - Development tool price - Not low power - Lot of competitor with better performance/price
  16. Considering that there is plenty of ARM cortex M4 with low of raw power and cheapo dspic & pic32, where would a C2000 be useful? I got a C2k launchpad, but i am trying to find it a use. Or put in general, how does low end C2k compare to other similar mcu, and where it would fit.
  17. I know it was humor, I even liked his post... but just could resist to say it was still not enough for free eagle. I know spirilis you use diptrace, and surely i will do so also, no more size limit, and more modern UI.
  18. But how many layer do they use? Free eagle doesn't allow commercial usage nor more than 2 layer.
  19. I recently had similar requirement (120v AC -> 3.3v DC) for a project. I simply bought a fully integrated power supply in a small package (small compared to big power block, but still require some pcb space) on digikey. It costed me about 14$, but i have the assurance it work and its safe. Can draw about 500 mA. It has the size of a relay.
  20. Input -> Piece wise equation if input < min ----> min value for timer register that control pwm if input > max ----> max value for timer register that control pwm else -----> linear equation that output the value to put in the timer register that control pwm to make desired pwm
  21. I was more talking about application note and other document like that that give a quick overall preview of how it work.
  22. Strangly, i can't find document on their captouch module. If i search on google captouch msp430, it only spit out result about pcb design & RC technique for getting capacitive input.
  23. Unfortunately, i just ordered my capacitive touch and IR booster pack few day before christmas (and all my other booster pack and launcpad for the year). From what i saw in the datasheet, TI did a great job at simplifying IR. I never tought it would be that simple. Still haven't looked yet at capacitive touch module. Anyone here have played with capacitive module yet?
  24. If he is using liquidcrystal, he is surely using a lot of string. String can use up memory pretty fast : n+1 bytes (where n is the number of character and 1 is for null character) No one would do string processing on a mcu, so I guess he won't modify them. Just declaring all string to constant would resolve all of his issue.
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