AFG/dump1090
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First cut for sampling at 2.4MHz + phase detection.

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This commit is contained in:
Oliver Jowett 2014-09-26 22:42:38 +01:00
parent 4cf07536be
commit 5c8e6198b7
3 changed files with 423 additions and 6 deletions
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12
dump1090.h
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@ -80,6 +80,7 @@
#define MODES_DEFAULT_PPM 52
#define MODES_DEFAULT_RATE 2000000
#define MODES_OVERSAMPLE_RATE 2400000
#define MODES_DEFAULT_FREQ 1090000000
#define MODES_DEFAULT_WIDTH 1000
#define MODES_DEFAULT_HEIGHT 700
@ -116,6 +117,13 @@
#define MODES_LONG_MSG_SIZE (MODES_LONG_MSG_SAMPLES * sizeof(uint16_t))
#define MODES_SHORT_MSG_SIZE (MODES_SHORT_MSG_SAMPLES * sizeof(uint16_t))
#define MODES_OS_PREAMBLE_SAMPLES (20)
#define MODES_OS_PREAMBLE_SIZE (MODES_OS_PREAMBLE_SAMPLES * sizeof(uint16_t))
#define MODES_OS_LONG_MSG_SAMPLES (268)
#define MODES_OS_SHORT_MSG_SAMPLES (135)
#define MODES_OS_LONG_MSG_SIZE (MODES_LONG_MSG_SAMPLES * sizeof(uint16_t))
#define MODES_OS_SHORT_MSG_SIZE (MODES_SHORT_MSG_SAMPLES * sizeof(uint16_t))
#define MODES_RAWOUT_BUF_SIZE (1500)
#define MODES_RAWOUT_BUF_FLUSH (MODES_RAWOUT_BUF_SIZE - 200)
#define MODES_RAWOUT_BUF_RATE (1000) // 1000 * 64mS = 1 Min approx
@ -250,6 +258,8 @@ struct { // Internal state
int iDataReady; // Fifo content count
int iDataLost; // Count of missed buffers
int trailing_space; // extra trailing space needed by magnitude buffer
uint16_t *pFileData; // Raw IQ samples buffer (from a File)
uint16_t *magnitude; // Magnitude vector
uint64_t timestampBlk; // Timestamp of the start of the current block
@ -287,6 +297,7 @@ struct { // Internal state
// Configuration
char *filename; // Input form file, --ifile option
int oversample;
int phase_enhance; // Enable phase enhancement if true
int nfix_crc; // Number of crc bit error(s) to correct
int check_crc; // Only display messages with good CRC
@ -434,6 +445,7 @@ int ModeAToModeC (unsigned int ModeA);
// Functions exported from mode_s.c
//
void detectModeS (uint16_t *m, uint32_t mlen);
void detectModeS_oversample (uint16_t *m, uint32_t mlen);
void decodeModesMessage (struct modesMessage *mm, unsigned char *msg);
void displayModesMessage(struct modesMessage *mm);
void useModesMessage (struct modesMessage *mm);