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removed the agc and replaced it with a fixed gain

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Andrew Stanford-Jason
2015-09-23 09:43:16 +01:00
parent e9b19cedaf
commit 38094b90c4
1 changed files with 4 additions and 2 deletions
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6
module_usb_audio/pcm_pdm_mic.xc
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@@ -211,11 +211,13 @@ void example(streaming chanend c_ds_output_0, streaming chanend c_ds_output_1, s
default:break; default:break;
} }
#define GAIN 0
if((-a) > max) max = (-a); if((-a) > max) max = (-a);
if(a > max) max = a; if(a > max) max = a;
int output; int output;
if(only_one_mic){ if(only_one_mic){
output = a<<(clz(max)-1); output = a<<GAIN;
} else { } else {
if((-a) > max) max = (-a); if((-a) > max) max = (-a);
if(a > max) max = a; if(a > max) max = a;
@@ -231,7 +233,7 @@ void example(streaming chanend c_ds_output_0, streaming chanend c_ds_output_1, s
if(f > max) max = f; if(f > max) max = f;
output = a+b+c+d+e+f+g+g; output = a+b+c+d+e+f+g+g;
output >>=3; output >>=3;
output = output<<(clz(max)-1); output = output<<GAIN;
} }
max = max - (max>>17); max = max - (max>>17);