libtonc: Tone Generator, Square Flags

Tone Generator, Square Flags
[Memory map bit(fields)]

Bits for REG_SND{1,2,4}CNT (aka REG_SOUND1CNT_H, REG_SOUND2CNT_L, REG_SOUND4CNT_L, respectively). More...


Defines
#define	SSQR_DUTY1_8 0
	12.5% duty cycle (#-------)
#define	SSQR_DUTY1_4 0x0040
	25% duty cycle (##------)
#define	SSQR_DUTY1_2 0x0080
	50% duty cycle (####----)
#define	SSQR_DUTY3_4 0x00C0
	75% duty cycle (######--) Equivalent to 25%
#define	SSQR_INC 0
	Increasing volume.
#define	SSQR_DEC 0x0800
	Decreasing volume.
#define	SSQR_LEN_MASK 0x003F
#define	SSQR_LEN_SHIFT 0
#define	SSQR_LEN(n) ((n)<<SSQR_LEN_SHIFT)
#define	SSQR_DUTY_MASK 0x00C0
#define	SSQR_DUTY_SHIFT 6
#define	SSQR_DUTY(n) ((n)<<SSQR_DUTY_SHIFT)
#define	SSQR_TIME_MASK 0x0700
#define	SSQR_TIME_SHIFT 8
#define	SSQR_TIME(n) ((n)<<SSQR_TIME_SHIFT)
#define	SSQR_IVOL_MASK 0xF000
#define	SSQR_IVOL_SHIFT 12
#define	SSQR_IVOL(n) ((n)<<SSQR_IVOL_SHIFT)
#define	SSQR_ENV_BUILD(ivol, dir, time) ( ((ivol)<<12) \| ((dir)<<11) \| (((time)&7)<<8) )
#define	SSQR_BUILD(_ivol, dir, step, duty, len) ( SSQR_ENV_BUILD(ivol,dir,step) \| (((duty)&3)<<6) \| ((len)&63) )

Bits for REG_SND{1,2,4}CNT (aka REG_SOUND1CNT_H, REG_SOUND2CNT_L, REG_SOUND4CNT_L, respectively).

Generated on Mon Aug 25 17:03:57 2008 for libtonc by

1.5.3