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| author | ymherklotz <ymherklotz@gmail.com> | 2018-02-27 12:20:40 +0000 |
|---|---|---|
| committer | ymherklotz <ymherklotz@gmail.com> | 2018-02-27 12:20:40 +0000 |
| commit | 8c4c776fedeb003055d3badde73ae014c1d51a8d (patch) | |
| tree | 0527dcc2fa4645726321093d1dd7349fb9c8ab89 /lab5/RTDSP/intio.c | |
| parent | 1a354b47a09800805ecdf6a0ec24fc1f67405bd8 (diff) | |
| download | NoiseSilencer-8c4c776fedeb003055d3badde73ae014c1d51a8d.tar.gz NoiseSilencer-8c4c776fedeb003055d3badde73ae014c1d51a8d.zip | |
Added efficient code
Diffstat (limited to 'lab5/RTDSP/intio.c')
| -rw-r--r-- | lab5/RTDSP/intio.c | 16 |
1 files changed, 7 insertions, 9 deletions
diff --git a/lab5/RTDSP/intio.c b/lab5/RTDSP/intio.c index 567324c..e7ae084 100644 --- a/lab5/RTDSP/intio.c +++ b/lab5/RTDSP/intio.c @@ -43,7 +43,7 @@ // PI defined here for use in your code #define PI 3.141592653589793 -#include "Matlab/coeff2.txt" +#include "Matlab/coeff.txt" int N = sizeof(a)/sizeof(a[0]); short* x; @@ -133,23 +133,21 @@ void init_HWI() void ISR_AIC() { int i = N-1; + double Y = 0.0; //Shift the values for (; i > 0; --i) { x[i] = x[i-1]; y[i] = y[i-1]; + + Y += x[i] * b[i] - y[i] * a[i]; } x[0] = mono_read_16Bit(); - y[0] = 0.0; + Y += x[0] * b[0]; - for (i = 0; i < N; ++i) { - y[0] += x[i] * b[i]; - if(i != 0) { - y[0] -= y[i] * a[i]; - } - } + y[0] = Y; - mono_write_16Bit((short)y[0]); + mono_write_16Bit((short)Y); } |