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adjusted amplif

master
Ondřej Hruška 6 years ago
parent
commit
df386cd594
  1. 31
      project/main.c

31
project/main.c

@ -22,7 +22,6 @@
static volatile bool capture_pending = false;
static volatile bool print_next_fft = false;
static volatile bool capturing_silence = false;
static float virt_zero_value = 2045.0f;
@ -55,13 +54,10 @@ void audio_capture_done(void* unused)
samp_buf.floats[i] = (float)samp_buf.uints[i];
}
if (capturing_silence) {
float mean;
arm_mean_f32(samp_buf.floats, samp_count, &mean);
virt_zero_value = mean;
info("New zero level = %f", virt_zero_value);
capturing_silence = false;
}
// normalize
float mean;
arm_mean_f32(samp_buf.floats, samp_count, &mean);
virt_zero_value = mean;
for (int i = 0; i < samp_count; i++) {
samp_buf.floats[i] -= virt_zero_value;
@ -97,7 +93,7 @@ void audio_capture_done(void* unused)
// normalize
dmtx_clear(dmtx);
float factor = (1.0f/bin_count)*0.1f;
float factor = (1.0f/bin_count)*0.2f;
for(int i = 0; i < bin_count-1; i+=2) {
bins[i] *= factor;
bins[i+1] *= factor;
@ -105,8 +101,11 @@ void audio_capture_done(void* unused)
//float avg = i==0 ? bins[1] : (bins[i] + bins[i+1])/2;
float avg = (bins[i] + bins[i+1])/2;
for(int j = 0; j < ceilf(avg); j++) {
dmtx_set(dmtx, i/2, j, true);
for(int j = 0; j < 1+floorf(avg); j++) {
//dmtx_toggle(dmtx, i/2, j);
dmtx_toggle(dmtx, i/2, j);
//dmtx_toggle(dmtx, j, 15-i/2);
//dmtx_toggle(dmtx, 15- i/2, 15-j);
}
}
@ -136,11 +135,6 @@ static void rx_char(ComIface *iface)
info("PRINT_NEXT");
print_next_fft = true;
}
if (ch == 's') {
info("SILENCE");
capturing_silence = true;
}
}
}
@ -152,11 +146,8 @@ int main(void)
{
hw_init();
capturing_silence = true; // capture silence at start
banner("*** LED MATRIX DEMO ***");
banner("*** FFT dot matrix display ***");
banner_info("(c) Ondrej Hruska, 2016");
banner_info("Katedra mereni K338, CVUT FEL");
debug_iface->rx_callback = rx_char;

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