opensnes/dsp1_8h_source.html

#ifndef SNES_DSP1_H

#define SNES_DSP1_H


#include <snes/types.h>


extern volatile s16 dsp1_o0;

extern volatile s16 dsp1_o1;

extern volatile s16 dsp1_o2;


void dsp1Init(void);


u16 dsp1Multiply(u16 a, u16 b);


void dsp1Triangle(u16 angle, s16 radius);


void dsp1Rotate(u16 angle, s16 x, s16 y);


void dsp1Attitude(u16 scale, u16 az, u16 ay, u16 ax);


void dsp1Objective(s16 x, s16 y, s16 z);


#endif /* SNES_DSP1_H */

dsp1Init
void dsp1Init(void)
Resynchronise the DSP-1 to a known command-wait state.

dsp1_o1
volatile s16 dsp1_o1

dsp1Triangle
void dsp1Triangle(u16 angle, s16 radius)
Scaled sine and cosine of an angle (DSP-1 command $04, "Triangle").

dsp1Objective
void dsp1Objective(s16 x, s16 y, s16 z)
Transform a point by matrix A: local → world (DSP-1 command $0D, "Objective").

dsp1Attitude
void dsp1Attitude(u16 scale, u16 az, u16 ay, u16 ax)
Build a 3D rotation matrix into slot A (DSP-1 command $01, "Attitude").

dsp1_o0
volatile s16 dsp1_o0
Multi-word DSP-1 result registers (written by multi-output commands).

dsp1Multiply
u16 dsp1Multiply(u16 a, u16 b)
Signed 1.15 × 1.15 multiply (DSP-1 command $00).

dsp1_o2
volatile s16 dsp1_o2

dsp1Rotate
void dsp1Rotate(u16 angle, s16 x, s16 y)
Rotate a 2D point about the origin (DSP-1 command $0C, "Rotate").

b
static u16 b
Definition main.c:157

a
static u16 a
Definition main.c:157

s16
signed short s16
16-bit signed integer (-32768 to 32767)
Definition types.h:50

u16
unsigned short u16
16-bit unsigned integer (0 to 65535)
Definition types.h:53

angle
static u16 angle
Rotation step index, 0..47.
Definition main.c:53

types.h
OpenSNES Standard Types.