radio95/fm95
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Code Issues Activity

calibration mode 3: 19 khz sine wave at 0 dbr of bs412

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KubaPro010
2025-12-31 11:05:04 +01:00
parent 48a30c89af
commit 237914d820
1 changed files with 2 additions and 1 deletions
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3
src/fm95.c
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@@ -165,6 +165,7 @@ int run_fm95(const FM95_Config config, FM95_Runtime* runtime) {
for (int i = 0; i < BUFFER_SIZE; i++) {
float sample = get_oscillator_sin_sample(&runtime->osc);
if(config.calibration == 2) sample = (sample > 0.0f) ? 1.0f : -1.0f; // Sine wave to square wave filter, 50% duty cycle
else if(config.calibration == 3) sample *= (19000/config.mpx_deviation);
output[i] = sample*config.master_volume;
}
if((pulse_error = write_PulseOutputDevice(&runtime->output_device, output, sizeof(output)))) { // get output from the function and assign it into pulse_error, this comment to avoid confusion
@@ -473,7 +474,7 @@ int setup_audio(FM95_Runtime* runtime, const FM95_DeviceNames dv_names, const FM
void init_runtime(FM95_Runtime* runtime, const FM95_Config config) {
if(config.calibration != 0) {
init_oscillator(&runtime->osc, (config.calibration == 2) ? 60 : 400, config.sample_rate);
init_oscillator(&runtime->osc, (config.calibration == 2) ? 60 : ((config.calibration == 1) ? 400 : 19000), config.sample_rate);
return;
}
else init_oscillator(&runtime->osc, 4750, config.sample_rate);