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Found 3 results

  1. DSP and Math lib

    Hi, I'm working in this library with some useful DSP and math functions (ideally focusing on embedded systems). Currently it's in the initial version with few functions, but I hope to add more in the next update. I prefered to use some structs to save parameters and use just one function to various instances of filters (very versatile). Functions - High Pass Filter (Single pole): Float, fixed and fixed extended version (with more bits to fractional part) - Low Pass Filter (Single Pole): Float, fixed, fixed extended and fixed fast (with some limitations related to cuttof frequency, but more efficienty. - RMS value: calculate RMS value of an array or sample by sample. Currently using square root function of math.h, but in the next update I will add a optimized version. I hope this can be useful. Feel free to test, share and contribute with this project. Github: https://github.com/agaelema/DSP_and_Math
  2. Embedded_Printf

    I would like to share with you this library. Is an embedded version of the famous "printf ( )". - https://github.com/agaelema/Embedded_Printf The start point was this post in the e2e where an user share a code. - http://e2e.ti.com/support/development_tools/code_composer_studio/f/81/p/30479/107146 I modified the code inserting new functions as binary notation, float notation, scientific notation, functions to convert numbers into strings and strings into numbers. The user can enable some #define enabling/disabling functions to use just what is useful. This is an resume comparison between the CCS native "printf" and this library (using th Launchpad EXP430FR6989 at 1MHz). - http://processors.wiki.ti.com/index.php/Printf_support_for_MSP430_CCSTUDIO_compiler To facilitate the port to other devices there is a separated file. Currently there are two ports: MSP430G2553 and MSP430FR6989. I hope it is useful.
  3. I am currently playing with a nifty little module from Anaren called AIR (2pg pdf:http://www.anaren.com/sites/default/files/Part-Datasheets/A1101R09C.pdf), for a low-power embedded project and it works OK; but I was wondering if anyone else had experience with any other like type modules? My loose requirements are that I would like to reasonably (not pie-in-the-sky) hit 1/4 - 1/2 mile distances at slow speeds (9600 baud is fine). I would like to use an omni antenna (so no high directional antennas), would prefer the module to have pre-FCC approval, and would like the modules to be less than $15. Lower the power draw the better, but we know how that trade-off works! Those requirements really limit me, but the Anaren part seems like it could cover them; I am just curious what other things are out there that I might have missed. I am not married to the 900MHz spectrum, it just seemed like the most likely place for me to meet my goals. This is for an outdoor transmission.
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