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Work on sample rate independency
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@ -33,9 +33,11 @@ inline static uint8_t sinSample(uint16_t i) {
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#define SWITCH_TONE(inc) (((inc) == MARK_INC) ? SPACE_INC : MARK_INC)
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#define BITS_DIFFER(bits1, bits2) (((bits1)^(bits2)) & 0x01)
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#define TRANSITION_FOUND(bits) BITS_DIFFER((bits), (bits) >> 1)
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// TODO: Maybe expand number of bits looked at here:
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#define DUAL_XOR(bits1, bits2) ((((bits1)^(bits2)) & 0x03) == 0x03)
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#define SIGNAL_TRANSITIONED(bits) DUAL_XOR((bits), (bits) >> 2)
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#define TRANSITION_FOUND(bits) BITS_DIFFER((bits), (bits) >> 1)
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#define CPU_FREQ F_CPU
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@ -55,7 +57,7 @@ inline static uint8_t sinSample(uint16_t i) {
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#define PHASE_INC SAMPLESPERBIT/8 // Nudge by an eigth of a sample each adjustment
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#define PHASE_BITS 8 // How much to increment phase counter each sample
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#define PHASE_MAX (SAMPLESPERBIT * PHASE_BITS) // Resolution of our phase counter = 64
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#define PHASE_MAX (SAMPLESPERBIT * PHASE_BITS) // Resolution of our phase counter
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#define PHASE_THRESHOLD (PHASE_MAX / 2) // Target transition point of our phase window
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#define DCD_TIMEOUT_SAMPLES CONFIG_SAMPLERATE/100
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@ -118,7 +120,7 @@ typedef struct Afsk
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int16_t iirX[2]; // IIR Filter X cells
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int16_t iirY[2]; // IIR Filter Y cells
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uint8_t sampledBits; // Bits sampled by the demodulator (at ADC speed)
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uint16_t sampledBits; // Bits sampled by the demodulator (at ADC speed)
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int8_t currentPhase; // Current phase of the demodulator
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uint8_t actualBits; // Actual found bits at correct bitrate
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