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MattTheGeek

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Everything posted by MattTheGeek

  1. MattTheGeek

    MSP430F5529 hardware implementation - review request

    Have you read the system integration manual for the GSM radio? if not, give it a read here (pay close attention to chapter two). The GSM radio is fairly picky. Are those sensors on breakout boards? That's all i can see right now, i'll take a more detailed look later. Design I'd recommend adding a reset switch for your MSP430. You need ESD protection for the SIM card. Any reason you need or want the DHT22? I really don't trust that sensor line for accurate measurements. Switch your UART line! It should look like this: _MSP430__ _GSM RADIO_ | | | | | | TX -> RX | | | | RX <- TX | | |_________| |____________| Crystal C2 and C3 are not needed. The UCS provides load capacitors up to 12pF. In fact that 32Khz crystal is not really needed. The UCS has a REFO clock source that can provide a 32Khz clock signal. I'd still would leave the crystal footprint in though so that it could be added at a later time if required. Power I would recommend replacing C7 with a 100uF tantalum capacitor. That GSM radio requires a lot of power when transmitting. Also consider providing reverse current protection if you think it may happen. the GSM radio does not have any reverse current protection. Follow the recommendations on reducing noise and EMI from the radio, as this could affect your analog components. The reset line seems to be really susceptible to EMI.
  2. The launchpad is $9.99 now?! Wow, I've been gone for some time...

    1. bluehash

      bluehash

      Yes.. and a new one too.

  3. MattTheGeek

    Heart Beat Counter [on LCD] - msp430g2553

    Have you considered turning it into a pulse oximeter? You just need to add another LED/Photodiode pair in red along with an additional AFE.
  4. MattTheGeek

    TI Package guide/image list

    TI has a nice PDF guide about their analog and logic IC packages, Including pictures!
  5. I found a nice 16x2 white on blue 3.3V character display a week ago, For $3.98 shipped via EMS (5 Days!). Brand new and works. Blue 16x2 Character display by MattTheGeek, on Flickr IMG_0181 by MattTheGeek, on Flickr
  6. MattTheGeek

    10 ways to kill an MSP430 launchpad?

    Do you mean a rule sheet specific to the MSP430 or a rugged MSP430 development board? In any case, replacing the MSP430 or launchpad might be a cheaper solution. Wouldn't a darlington transistor pair work as well?
  7. MattTheGeek

    Calling for Wiki(The 43oh Library) Volunteers

    Did, same username.
  8. MattTheGeek

    Calling for Wiki(The 43oh Library) Volunteers

    Hi bluehash, I'd like to help out with the wiki.
  9. Just returned after a long period of inactivity.

  10. Constructing page... So people (You know who you are ) have been requesting that i do a part kit group buy for rob's boosterpack. So lets begin. This group buy is for part kits for rob's cc2500 boosterpack/breakout, AND a way to get bulk discount prices on some components The kit The part kit would include everything required to make / populate rob's cc2500 breakout/boosterpack, which would be: Active 1 - 64Kbit EEPROM (25AA640A-I/SN) 1 - 64Kbit SRAM (23K640-I/SN) 2 - MSP430G2553 MCU (MSP430G2553IPW20) 2 - Voltage Regulators (TPS77301DGK) Passive 6 - 0.1uF ceramic capacitors (0805) 2 - 0.1uF ceramic capacitors (0805) 2 - 1nF ceramic capacitors (0805) 4 - 1uF electrolytic capacitors (SMC_A) 2 - 47K resistors (0805) 2 - 6.8K resistors (0805) 2 - 3.3K resistors (0805) Other 2 - 2x40 2.54mm male header strip 1 - 1x40 2.54mm male header strip 1 - 1x40 2.54mm female header strip Price: TBD Shipping: TBD The Components if you want, you can also get some components at a bulk price. Price breaks are calculated by the total ordered by the group. MSP430G2553IPW20 (MSP430G2553 in a TSSOP20 package) Normally priced around at $2.78 each. 1 to 99 $2.15 each 100 to 249 $1.95 each 250+ $1.75 each 23K256-I/SN(256KB SPI SRAM) Normally priced around at $1.62 each. 1 to 9 $1.62 each 10 to 24 $1.06 each 25 and up $1.02 each TPS77301DGK(LDO rated at 250mA and is Adjustable(1.5 to 5.5V). Used on Launchpad too) Flat price of $1.40 since no price break exists.
  11. MattTheGeek

    TI Compiler ABI

    Seems like the TI MSP430 Compiler (V4.1.1) prefers using EABI now over the legacy COFF ABI. Any advantage on using EABI for small memory size devices? From what i've seen it prefers to use Flash over ram. Optimization level 4, Optimize for size (0). COFF ABI: Text: 534 bytes Data: 46 bytes EABI: Text: 670 bytes Data: 12 bytes
  12. Still a work in progress. The Stellaris To Breaboard BoosterPack allows you to use your Stellaris LaunchPad in a breadboard (a double wide one). Stacks on the bottom
  13. There isn't any device crippling bugs, but there are some that may be annoying now and perhaps later in the future. But Just out of curiosity, Did anyone get a XMS430G2231 or XMS430G2211 when the MSP430 value line LaunchPad first came out? The only development/eval kit from TI that had experimental silicon was the Chronos.
  14. MattTheGeek

    OLIMEXINO-5510

    /* #: Move to where appropriate */ So Olimex is doing a arduino style F5510 development board mainly for use with EasyMSP. I'm requesting feedback from the Community. Ideas? Comments? Features: Enhanced CPUX. Large amount of flash and ram for programs. (32KB FLASH / 6KB RAM) USB Bootloading + Spy-bi wire JTAG. ... and more. OLIMEXINO-5510_Rev_A_24012012.pdf
  15. Is it just me or does anyone else prefer MSP430 architecture over the Stellaris architecture?

    1. Show previous comments  3 more
    2. abecedarian

      abecedarian

      What bothers me is that natural language programming hasn't yet grown legs.

      Why can't I say "When TimerA equals 1024 store ADCSample1 in X"?

    3. L.R.A

      L.R.A

      Its much more dificult to me to read a stellaris microcontroler datasheet than any msp430. Probaly 100x more dificult.

      In msp430 i can easily find the registers and data about timers or anytigh.

      I liked msp430 assemble

    4. buzztiaan

      buzztiaan

      man, i -love- the lm4f

  16. You can try returning the launchpad, since you have a LX4F and not a LM4F. "Should this evaluation board/kit not meet the specifications indicated in the User’s Guide, the board/kit may be returned within 30 days from the date of delivery for a full refund." (See http://www.ti.com/lit/ml/sszz027b/sszz027b.pdf)
  17. I got experimental silicon as well. Makes for a better collector item.
  18. After waiting months... The Stellaris Launchpad finally arrived.

  19. It took a while... but it finally got here!
  20. Free shipping from SparkFun, and Pololu's black friday sale.
  21. Just got my unpopulated Launchpad PCBs. Time to frame them...

  22. MattTheGeek

    Launchpad v1.4 PCBs FREE with Every Order

    I was hoping for a uncut panel, but these should do fine in a frame. Thanks LariSan & Bluehash.
  23. MattTheGeek

    Launchpad v1.4 PCBs FREE with Every Order

    I thought we were ordering panels to begin with?
  24. MattTheGeek

    Launchpad v1.4 PCBs FREE with Every Order

    I think i will frame one of them. My question is, do you get PCB cutouts or a whole panel (Please let it be a panel )?
  25. MattTheGeek

    About the MSP430 clocks.

    The tolerance of the crystal provided with the launchpad is +/-20ppm (or 0.002%). It's not the best, but it works.
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