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LCR in TEDI 1200/2400 AFSK transmit

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This commit is contained in:
furrtek 2015-08-28 20:50:42 +02:00
parent 8f815a3b39
commit 0e0261f813
10 changed files with 1071 additions and 2 deletions
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64
firmware/baseband/main.cpp
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@ -760,6 +760,65 @@ private:
int32_t k;
};
class LCRFSKProcessor : public BasebandProcessor {
public:
void execute(buffer_c8_t buffer) override {
for (size_t i = 0; i<buffer.count; i++) {
//Sample generation 2.28M/10=228kHz
if(s >= 9) {
s = 0;
fsk_samples_per_bit = shared_memory.fskspb;
if(sample_count >= fsk_samples_per_bit) {
cur_byte = shared_memory.lcrdata[bit_pos / 8];
if (!cur_byte) {
//TransmitterModel::disable();
bit_pos = 0;
cur_byte = shared_memory.lcrdata[0];
}
cur_bit = cur_byte >> (7-(bit_pos % 8)) & 1;
bit_pos++;
sample_count = 0;
}
sample_count++;
if (cur_bit)
aphase += 267187;
else
aphase += 489844;
sample = sintab[(aphase & 0x03FF0000)>>16];
} else {
s++;
}
//FM
frq = sample * 967;
phase = (phase + frq);
sphase = phase + (256<<16);
re = sintab[(sphase & 0x03FF0000)>>16];
im = sintab[(phase & 0x03FF0000)>>16];
buffer.p[i] = {(int8_t)re,(int8_t)im};
}
}
private:
uint32_t fsk_samples_per_bit;
int8_t re, im;
uint8_t s;
uint32_t bit_pos;
uint8_t cur_byte = 0;
uint8_t cur_bit = 0;
uint32_t sample_count;
uint32_t aphase, phase, sphase;
int32_t sample, sig, frq;
};
static BasebandProcessor* baseband_processor { nullptr };
static BasebandConfiguration baseband_configuration;
@ -1024,6 +1083,11 @@ int main(void) {
direction = baseband::Direction::Transmit;
baseband_processor = new RDSProcessor();
break;
case 16:
direction = baseband::Direction::Transmit;
baseband_processor = new LCRFSKProcessor();
break;
default:
break;