Macros | |
| #define | SSTVENC_PS_PHASE_INIT (0) |
| #define | SSTVENC_PS_PHASE_RISE (1) |
| #define | SSTVENC_PS_PHASE_HOLD (2) |
| #define | SSTVENC_PS_PHASE_FALL (3) |
| #define | SSTVENC_PS_PHASE_DONE (4) |
Detailed Description
Macro Definition Documentation
◆ SSTVENC_PS_PHASE_DONE
| #define SSTVENC_PS_PHASE_DONE (4) |
Pulse finished. The state machine will reset sstvenc_pulseshape::sample_idx to zero on entering this state and will increment it each sample whilst keeping sstvenc_pulseshape::output at zero.
Definition at line 75 of file pulseshape.h.
Referenced by sstvenc_cw_handle_state_mark(), sstvenc_modulator_fill_buffer(), sstvenc_ps_advance(), sstvenc_ps_compute(), sstvenc_psosc_fill_buffer(), and sstvenc_sequencer_compute().
◆ SSTVENC_PS_PHASE_FALL
| #define SSTVENC_PS_PHASE_FALL (3) |
Falling slope. The amplitude is being wound down to zero.
The counter sstvenc_pulseshape::sample_idx is used to track the fall. When it reaches or exceeds sstvenc_pulseshape::fall_sz, the state machine resets the counter and advances to SSTVENC_PS_PHASE_DONE.
Definition at line 67 of file pulseshape.h.
Referenced by sstvenc_cw_handle_state_mark(), sstvenc_modulator_compute(), sstvenc_modulator_next_hold_sample(), and sstvenc_ps_compute().
◆ SSTVENC_PS_PHASE_HOLD
| #define SSTVENC_PS_PHASE_HOLD (2) |
Hold state. We maintain the pulse amplitude at its maximum for the duration of the pulse.
The counter sstvenc_pulseshape::sample_idx is used to track the time period spent at maximum amplitude. If sstvenc_pulseshape::hold_sz is finite, the counter is reset and the state machine advanced to SSTVENC_PS_PHASE_FALL once it reaches or exceeds sstvenc_pulseshape::hold_sz.
Otherwise, it will stay in this state indefinitely, code must call sstvenc_ps_advance manually to exit the hold state.
Definition at line 58 of file pulseshape.h.
Referenced by sstvenc_cw_handle_state_mark(), sstvenc_modulator_compute(), and sstvenc_ps_compute().
◆ SSTVENC_PS_PHASE_INIT
| #define SSTVENC_PS_PHASE_INIT (0) |
Initial state. No samples have been emitted yet. sstvenc_ps_compute immediately moves the state machine to SSTVENC_PS_PHASE_RISE and handles the machine accordingly.
Definition at line 35 of file pulseshape.h.
Referenced by sstvenc_cw_handle_state_mark(), sstvenc_modulator_compute(), sstvenc_ps_compute(), and sstvenc_ps_reset_samples().
◆ SSTVENC_PS_PHASE_RISE
| #define SSTVENC_PS_PHASE_RISE (1) |
Rising slope. The amplitude is being ramped up to maximum.
The counter sstvenc_pulseshape::sample_idx is used to track the rise. When it reaches or exceeds sstvenc_pulseshape::rise_sz, the state machine resets the counter and advances to SSTVENC_PS_PHASE_HOLD.
Definition at line 44 of file pulseshape.h.
Referenced by sstvenc_cw_handle_state_mark(), sstvenc_modulator_compute(), and sstvenc_ps_compute().
