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Dump raw data.

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This commit is contained in:
John Greb 2015-01-25 17:27:20 +00:00
parent d4a9f8e8e3
commit f043d364b1
2 changed files with 31 additions and 11 deletions
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41
plugins/channel/lora/lorademod.cpp
View File

@ -47,7 +47,7 @@ LoRaDemod::LoRaDemod(SampleSink* sampleSink) :
negaFilter = new sfft(LORA_SFFT_LEN); negaFilter = new sfft(LORA_SFFT_LEN);
mov = new float[4*LORA_SFFT_LEN]; mov = new float[4*LORA_SFFT_LEN];
history = new short[256]; history = new short[1024];
} }
LoRaDemod::~LoRaDemod() LoRaDemod::~LoRaDemod()
@ -68,26 +68,43 @@ void LoRaDemod::configure(MessageQueue* messageQueue, Real Bandwidth)
cmd->submit(messageQueue, this); cmd->submit(messageQueue, this);
} }
void LoRaDemod::dumpRaw()
{
int i, j, max;
max = m_time - 4;
if (max > 32 * 4)
max = 32 * 4;
char text[256];
for ( i=0; i < max; i+=4) {
j = i / 4;
text[j] = 32 + (toGray(127 & history[i + 4]) >> 1);
}
text[i / 4] = 0;
printf(">%s..(%d)\n", text, m_time / 4);
}
short LoRaDemod::synch(short bin) short LoRaDemod::synch(short bin)
{ {
if (bin < 0) { if (bin < 0) {
if (m_time > 70)
dumpRaw();
m_time = 0; m_time = 0;
return 0; return -1;
} }
history[m_time] = bin; history[m_time] = (bin + m_tune) & (LORA_SFFT_LEN - 1);
if (m_time > 12) if (m_time > 12)
if (history[m_time] == history[m_time - 6]) if (history[m_time] == history[m_time - 6])
if (history[m_time] == history[m_time - 12]) { if (history[m_time] == history[m_time - 12]) {
m_time = 0; m_time = 0;
m_tune = bin; m_tune = LORA_SFFT_LEN - bin;
return 0; return -1;
} }
m_time++; m_time++;
m_time &= 255; m_time &= 1023;
if (m_time < 4) if (m_time & 3)
return 0; return -1;
return (LORA_SFFT_LEN + bin - m_tune) & (LORA_SFFT_LEN - 1); return (bin + m_tune) & (LORA_SFFT_LEN - 1);
} }
int LoRaDemod::detect(Complex c, Complex a) int LoRaDemod::detect(Complex c, Complex a)
@ -123,10 +140,12 @@ int LoRaDemod::detect(Complex c, Complex a)
mov[movpoint * LORA_SFFT_LEN + i] = mag[i]; mov[movpoint * LORA_SFFT_LEN + i] = mag[i];
} }
if (peak > negpeak * 4) { if (peak > negpeak * 4) {
m_result = synch(result); result = synch(result);
} else { } else {
synch(-1); result = synch(-1);
} }
if (result >= 0)
m_result = result;
return m_result; return m_result;
} }

1
plugins/channel/lora/lorademod.h
View File

@ -45,6 +45,7 @@ public:
private: private:
int detect(Complex sample, Complex angle); int detect(Complex sample, Complex angle);
void interleave(short* inout); void interleave(short* inout);
void dumpRaw(void);
short synch (short bin); short synch (short bin);
short toGray(short bin); short toGray(short bin);
class MsgConfigureLoRaDemod : public Message { class MsgConfigureLoRaDemod : public Message {