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NickTompkins

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NickTompkins last won the day on March 18 2016

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  1. NickTompkins

    FFT

    Here is some C code I have used to make the sine table for the fix_fft function if I wanted to change the size of the FFT #include <stdio.h> #include <math.h> #define POINTS 128 #define BITS 16 int main(void) { int n; int a=0; int TF_FLAG=POINTS-POINTS/4; printf("#define N_WAVE %d /* full length of Sinewave[] */\n",POINTS); printf("#define LOG2_N_WAVE %d /* log2(N_WAVE) */\n",(long)log2(POINTS)); printf("/* 3/4 of N_WAVE = %d */\n",TF_FLAG); printf("const int8_t Sinewave[N_WAVE-N_WAVE/4] = {\n"); for (n=0; n<POINTS; n++){ if(n==TF_FLAG){ printf("/*"); } if(a<15){ printf("%d,", (int)floor(0.5 + ((1 << (BITS-1)) - 0.50001) * sin(2 * 3.1415926535897932 / POINTS * n))); a++;} else{ a=0; printf("%d,\n", (int)floor(0.5 + ((1 << (BITS-1)) - 0.50001) * sin(2 * 3.1415926535897932 / POINTS * n))); } } printf("*/"); printf("};\n"); return 0; } You can copy and paste the output into your fix_fft.c file ;-)
  2. I know I am excited I wonder if Contiki will load without issues :-)
  3. The SPI is finally working on the connected launchpad with MOSI/MISO pin swapped. We even have multiple modules working perfect. Thank you for your help! But we haven't figured out the I2C problem yet... But that is unrelated ;-)
  4. Also on your working example what pins did you change in your code? I am having a rough go of this and I am unsure why.....
  5. I will give that a go. Also I wonder about having the ability to run 4 of these modules with all the different SPI ports...
  6. Reading what he is saying is that he is using 2 Launchpads....
  7. The Barometric Example isn't working it seems on TM4C129.
  8. Has anyone done anything with the SPI on this launchpad? Perhaps an example?
  9. Awesome Oppa just awesome so I am still in the process to get the RC522 to work on the Connected Launchpad
  10. So the Tiva Seemed to work with this as far as I could tell yet the connected launchpad could not..... I think we (our little group) will be looking into possible reasons why and in hopes we might be able to tap into some of the experience here on these forums.
  11. We find that this doesnt quite port over well to the Connected Launchpad anyone else run into this problem?
  12. Wow rob I think this is exactly what I was looking for.... Is there a way to pull data from your software like perhaps a counting int that is generated from the MCU? I have send you a PM btw....
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