T T / Mbed 2 deprecated Nucleo_IQDDS

AD9857 IQ DDS Digital Up Converter Experiment using Nucleo F401

Dependencies:   mbed

Digital Signal Processing for IQ Quadradure Modulation DDS AD9857 using Nucleo F401.

see http://ttrftech.tumblr.com/post/114310226891/

dsp.h@6:ed82052bd505, 2015-03-23 (annotated)

Committer:
edy555
Date:
Mon Mar 23 21:53:48 2015 +0000
Revision:
6:ed82052bd505
Parent:
0:55201637d936 
use phase accumration in fm modulation, archive very good result!

Who changed what in which revision?

UserRevisionLine numberNew contents of line
edy555 0:55201637d936 1 #ifndef _DSP_H_
edy555 0:55201637d936 2 #define _DSP_H_
edy555 0:55201637d936 3
edy555 0:55201637d936 4 #define HILBERT_TRANSFORM_FIRSTATE_LENGTH 128*2
edy555 0:55201637d936 5
edy555 0:55201637d936 6 extern int16_t htstat_buf[HILBERT_TRANSFORM_FIRSTATE_LENGTH];
edy555 0:55201637d936 7 // capture interval 10ms onto double buffer (5ms each)
edy555 0:55201637d936 8 // 48kHz x 2ch * 5ms = 240*2
edy555 0:55201637d936 9 #define CAPTURE_LEN 240*2
edy555 0:55201637d936 10 extern int16_t cap_buf[2][CAPTURE_LEN];
edy555 0:55201637d936 11 // 240*2 * 4 = 1920, single buffer
edy555 0:55201637d936 12 #define FIRSTATE_LENGTH 16*2
edy555 0:55201637d936 13 extern int16_t fir_state[FIRSTATE_LENGTH];
edy555 0:55201637d936 14 extern int16_t fir_buf[CAPTURE_LEN];
edy555 0:55201637d936 15 #define CICBUF_LEN 1920
edy555 0:55201637d936 16 extern int16_t cic_buf[CICBUF_LEN];
edy555 0:55201637d936 17 // 1920 * 10 = 19200, double buffer
edy555 0:55201637d936 18 #define DMA_DATALEN 19200
edy555 0:55201637d936 19 extern int16_t dma_buf[2][DMA_DATALEN];
edy555 0:55201637d936 20
edy555 0:55201637d936 21
edy555 0:55201637d936 22 typedef struct {
edy555 0:55201637d936 23 uint32_t p0;
edy555 0:55201637d936 24 uint32_t s0;
edy555 0:55201637d936 25 } CICState;
edy555 0:55201637d936 26
edy555 0:55201637d936 27 extern CICState cic;
edy555 0:55201637d936 28
edy555 0:55201637d936 29 void cic_interpolate_x10(CICState *cic, uint32_t *src, int src_len, uint32_t *dst);
edy555 0:55201637d936 30
edy555 0:55201637d936 31
edy555 0:55201637d936 32 void fir_resample_x4(uint32_t *src_state, uint32_t *dst, int dst_len);
edy555 0:55201637d936 33
edy555 0:55201637d936 34 void interpolate_test();
edy555 0:55201637d936 35
edy555 0:55201637d936 36 void hilbert_transform(uint32_t *src, uint32_t *dst, int dst_len, int sign);
edy555 0:55201637d936 37 void hilbert_transform_save_fir_state(uint32_t *src_tail);
edy555 0:55201637d936 38
edy555 0:55201637d936 39 void hilbert_transform_test();
edy555 0:55201637d936 40
edy555 0:55201637d936 41
edy555 0:55201637d936 42 typedef struct {
edy555 6:ed82052bd505 43 uint16_t phase;
edy555 0:55201637d936 44 } FMModState;
edy555 0:55201637d936 45
edy555 0:55201637d936 46 extern FMModState fmmod;
edy555 0:55201637d936 47
edy555 0:55201637d936 48 //uint32_t cos_sin(int16_t x);
edy555 0:55201637d936 49
edy555 0:55201637d936 50 void fmmod_init(FMModState *fmmod);
edy555 0:55201637d936 51 void frequency_modulation(FMModState *fmmod, uint32_t *src, uint32_t *dst, int dst_len);
edy555 0:55201637d936 52
edy555 0:55201637d936 53 void amplitude_modulation(uint32_t *src, uint32_t *dst, int dst_len);
edy555 0:55201637d936 54
edy555 0:55201637d936 55
edy555 0:55201637d936 56 #endif /* _DSP_H_ */