Diff: dsp.h

Revision:

0:55201637d936

Child:

6:ed82052bd505

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dsp.h	Sat Mar 21 08:31:20 2015 +0000
@@ -0,0 +1,56 @@
+#ifndef _DSP_H_
+#define _DSP_H_
+
+#define HILBERT_TRANSFORM_FIRSTATE_LENGTH 128*2
+
+extern int16_t htstat_buf[HILBERT_TRANSFORM_FIRSTATE_LENGTH];
+// capture interval 10ms onto double buffer (5ms each)
+// 48kHz x 2ch * 5ms = 240*2
+#define CAPTURE_LEN 240*2
+extern int16_t cap_buf[2][CAPTURE_LEN];
+// 240*2 * 4 = 1920, single buffer
+#define FIRSTATE_LENGTH 16*2
+extern int16_t fir_state[FIRSTATE_LENGTH];
+extern int16_t fir_buf[CAPTURE_LEN];
+#define CICBUF_LEN 1920
+extern int16_t cic_buf[CICBUF_LEN];
+// 1920 * 10 = 19200, double buffer
+#define DMA_DATALEN 19200
+extern int16_t dma_buf[2][DMA_DATALEN];
+
+
+typedef struct {
+    uint32_t p0;        
+    uint32_t s0;
+} CICState;
+
+extern CICState cic;
+
+void cic_interpolate_x10(CICState *cic, uint32_t *src, int src_len, uint32_t *dst);
+
+
+void fir_resample_x4(uint32_t *src_state, uint32_t *dst, int dst_len);
+
+void interpolate_test();
+
+void hilbert_transform(uint32_t *src, uint32_t *dst, int dst_len, int sign);
+void hilbert_transform_save_fir_state(uint32_t *src_tail);
+
+void hilbert_transform_test();
+
+
+typedef struct {
+    uint32_t vec;
+} FMModState;
+
+extern FMModState fmmod;
+
+//uint32_t cos_sin(int16_t x);
+
+void fmmod_init(FMModState *fmmod);
+void frequency_modulation(FMModState *fmmod, uint32_t *src, uint32_t *dst, int dst_len);
+
+void amplitude_modulation(uint32_t *src, uint32_t *dst, int dst_len);
+
+
+#endif /* _DSP_H_ */