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The_YongGrand

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The_YongGrand last won the day on October 10 2012

The_YongGrand had the most liked content!

About The_YongGrand

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    Atten Oscilloscope
  1. Thanks for the prompt reply. I don't mind the single precision FP, as long as I don't have to worry about slowing the system down when I have to calculate FP. I'll keep referring and learning about the Energia platform as I need to quick prototype my project to replace the dsPIC. Btw, Happy Christmas!
  2. Hello there, As I can't get the CCS compiler working, I may temporarily use the Energia. However, I can't find anything about the floating point support in Energia. I need these because part of the work I'm doing requires floating point, and because since there's the FPU inside the processor, might as well as not waste it at all. How do I know if the FPU is enabled or not in Energia? And is Energia using the GCC as compiler and CMSIS modules for its libraries? Thanks.
  3. I like the entire thread about the electric scooter and the battry monitoring system. Hope we get to see more Stellaris in electric transports!
  4. The_YongGrand

    Very Basic HD44780 driver for Stellaris LaunchPad

    Dear ladies and gentlemen, Thanks very much for the support and the improvisations. As I'm a pretty busy dude, my Stellaris playtime has been reduced a bit. I'll come back to playing the Stellaris when I got the time. Keep the improvisations coming, and have a Happy Christmas and Merry New Year too.
  5. The_YongGrand

    Very Basic HD44780 driver for Stellaris LaunchPad

    Hello there, Is it the latest "lab2" you have downloaded? Because the older one doesn't work. Plus, are the connections to the Launchpad tight? Sometimes loose connections will cause the LCD not to start.
  6. Here's the picture. Unfortunately, I don't have an access to a full camera with zoom, so I'm using a smartphone instead. The vapour is a bit prominent in the pic (the whitish film on the resistors and around the chip) and I've circled the area where the vapor/cloud spreaded on it during the cooking process. The SMD thingy is a MOSFET - it went fried when I accidently put +5V into the ground and vice versa.
  7. I got it just right on 2nd October. A fun little toy, I'd say. Maybe I'm making Christmas toys with these.
  8. The_YongGrand

    ARM Assembler: Calling FPU instructions

    Hello there, I've played around with the Launchpad's exercise module provided, especially on the FPU, and it's quite nice and easy to work with. However, when I tried to call the FPU assembly instructions inside the C, like __asm(" VMOV S0, #2.56 "), that didn't work during compilation. Other instructions work except all the ones with the floating points. So I checked the disassembler for this FPU exercise, and found out that almost all of the FPU instructions are starting with F, which is FLDS, FMSR, FMULS, and others exist on it. Searched around in the net with some assembly examples on FPU but without much luck. Any ideas why the vector instructions don't work at all?
  9. I'll post it up later when I borrow a bigger digital camera. The vapour mark is very faint, but it spreads around the MOSFET (I accidently applied +5V into its ground, and vice versa) and that could not be taken with an ordinary smartphone. Plus, you give awards for those who sent Stellaris Launchpad tutorials?
  10. A few days ago I had a HD44780 went up in smoke - but it disappeared when I tried to take the cam. Too fast. But I have the vapour mark on the power section of the HD44780 - does that count for the "Blue Smoke" acheivement?
  11. The_YongGrand

    Very Basic HD44780 driver for Stellaris LaunchPad

    Thanks. Added a main pic. This one uses a 20x4 LCD and I added a few phrases to fill up the screen. Edit: To those who have downloaded and tested the code just to find boring dark boxes on the screen, I made a careless mistake in the header file. I've fixed the header file again - please download again. Apologies for the inconvenience.
  12. Here's a very basic HD44780 driver for Stellaris Launchpad. Supports up to 20x4 LCD and a full PORTB register is used. Due to the nature of the GPIOPinWrite function which uses masking and whatnots, extra code on the driver will be written in the future to accomodate such functions. Uses two files: hd44780_lp.c and hd44780_lp.h An example is in the attachment. It's called "lab2" because I fooled around with the Stellaris Launchpad Workbook earlier. Note: Please refer to online tutorials on the HD44780 connections. Comments are greatly appreciated! lab2_revised.zip
  13. The_YongGrand

    Stellar grade forums

    Thanks for the tip. I'm reading up the registers on the datasheet a bit more - is it OK to do so? Because I'm very used to manipulating the registers directly in PIC32, so there would be a bit of a habit to do this manually instead of depending on the libraries. I would use libraries for USB and SD-Card File System due to the complexity. The GPIO for ARM processors are a bit more complicated, so I may have to read the part thoroughly.
  14. The_YongGrand

    Stellar grade forums

    By the way, what license should I select? I read from the TI Launchpad wiki site that there is no code size/optimization limits specially on TI Stellaris Launchpad, so I selected something about "Free for Stellaris emulators". The license setup wizard now, when I click on it, only left "Activate" and "Code Size Limited". How am I going to see whether it's still licensed for the TI Stellaris Launchpad or it is still in evaluation mode? Thanks.
  15. The_YongGrand

    Stellar grade forums

    I just got my Stellaris Launchpads. I will test a bit today or tomorrow.
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