diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/fl2k_ampliphase.c | 28 |
1 files changed, 0 insertions, 28 deletions
diff --git a/src/fl2k_ampliphase.c b/src/fl2k_ampliphase.c index 2d1f5bd..76211c0 100644 --- a/src/fl2k_ampliphase.c +++ b/src/fl2k_ampliphase.c @@ -230,34 +230,6 @@ dds_t dds_init(float sample_freq, float freq, float phase, float amp, enum wavef return dds; } -static inline int8_t dds_real(dds_t *dds) -{ - int tmp; - int32_t amp_i, amp_q; - int8_t amp8; - - // advance dds generator - tmp = dds->phase >> TRIG_TABLE_SHIFT; - dds->phase += dds->phase_step; - dds->phase &= 0xffffffff; - - //amp = 255; - amp_i = creal(dds->amplitude) * 23170.0; // 0..15, * 1/SQRT(2) - amp_q = cimag(dds->amplitude) * 23170.0; - amp_i = amp_i * trig_table.quadrature[tmp]; // 0..31, * 1/SQRT(2) - amp_q = amp_q * trig_table.inphase[tmp]; // 0..31, * 1/SQRT(2) - amp8 = (int8_t) ((amp_i + amp_q) >> 24); // 0..31 >> 24 => 0..8 - dds->amplitude += dds->ampslope; - return amp8; -} - -static inline void dds_real_buf(dds_t *dds, int8_t *buf, int count) -{ - int i; - for (i = 0; i < count; i++) - buf[i] = dds_real(dds); -} - static inline void dds_complex(dds_t *dds, int8_t * i, int8_t * q) { |