mpc.inc

8051 mp3 very good for using

;------------------------------------------------;
; Constants

.equ	NTRK = 36	; Number of TOC entries
.equ	NBBT = 65	; Number of BBT entries

.equ	MTMR = 40	; Muting delayed release timer in unit of 2ms
.equ	TRKGAP = 62	; Track gap time in unit of 8ms

.equ	VOLMAX = 0x31	; Maximum volume value
.equ	VOLMIN = 0x10	; Minimum volume value
.equ	VOLRATE = 32	; Volume auto step period in unit of 8ms
.equ	STPHLD = 87	; Resume trigger time in unit of 8ms


;------------------------------------------------;
; Port definitions

	; PORTA is assigned as SM data port

	; PORTB bit definitions
.equ	KEY0	= PB0	; I: Key - input 0
.equ	KEY1	= PB1	; I: Key - input 1
;.equ		= PB2	; I: <VBAT>
;.equ		= PB3	; I: <VREF>
.equ	KEY4	= PB4	; I: Key - input 4
.equ	MOSI	= PB5	; P: HOST - MOSI
.equ	MISO	= PB6	; O: HOST - MISO
.equ	SCK	= PB7	; P: HOST - SCK

	; PORTC bit definitions
.equ	MPDAT	= PC0	; O: DSP - Bit stream data
.equ	MPCK	= PC1	; O: DSP - Bit stream clock
.equ	CE	= PC2	; O: SM - CE#
.equ	CLE	= PC3	; O: SM - CLE
.equ	RE	= PC4	; O: SM - RE#
.equ	ALE	= PC5	; O: SM - ALE
.equ	BSY	= PC6	; P: SM - RDY/BSY#
.equ	WE	= PC7	; O: SM - WE#

	; PORTD bit definitions
.equ	POWER	= PD0	; O: Power - Self-Holding
.equ	LED	= PD1	; O: Power - LED
.equ	VREF	= PD2	; I: Power - VREF/VBAT compare level (L=1.8, Z=2.0)
.equ	WSEN	= PD3	; O: DSP - DSP Enable
.equ	DRQ	= PD4	; I: DSP - Data Request
.equ	IICC	= PD5	; O: IIC - Clock
.equ	IICD	= PD6	; I: IIC - Data
;.equ		= PD7	; P: <NC>



;------------------------------------------------;
; Key commands (coded in port B inputs)

.equ	K_PLAY	= 0b10000
.equ	K_STOP	= 0b00010
.equ	K_NEXT	= 0b00011
.equ	K_PREV	= 0b10001
.equ	K_VOLU	= 0b00001
.equ	K_VOLD	= 0b10010


;------------------------------------------------;
; SmartMedia definitions


	; SM commands
.equ	C_RD0	= 0x00	; Page read A
.equ	C_RD2	= 0x50	; Page read C
.equ	C_WR	= 0x80	; Ready to write
.equ	C_PRG	= 0x10	; Start to write page
.equ	C_ERA1	= 0x60	; Erase block (block#)
.equ	C_ERA2	= 0xd0	; Erase block (start)
.equ	C_STA	= 0x70	; Read status
.equ	C_ID	= 0x90	; Read ID
.equ	C_RES	= 0xff	; Device reset


	; SM properties
.equ	Sign8	= 0xe6	; 8MB
.equ	Pages8	= 16384	; 
.equ	Blkp8	= 16	; /

.equ	Sign16	= 0x73	; 16MB
.equ	Pages16	= 32768	; 
.equ	Blkp16	= 32	; /

.equ	Sign32	= 0x75	; 32MB
.equ	Pages32	= 65536	; 
.equ	Blkp32	= 32	; /

.equ	Sign64	= 0x76	; 64MB
.equ	Pages64	= 131072; 
.equ	Blkp64	= 32	; /

.equ	Sign128	= 0x79	; 128MB
.equ	Pages128 = 262144;
.equ	Blkp128	= 32	; /


;------------------------------------------------;
; Register variables

	; Playback and SM access
.def	_SrgTmp	= r7	; SREG save register
.def	_SrgTmp2= r8	; /
.def	_0	= r9	; Zero register

.def	_PageL	= r10	; Current page# and page counter
.def	_PageM	= r11	;  * keep this position and order
.def	_PageH	= r12	; 
.def	_CntL	= r13	; 
.def	_CntM	= r14	; 
.def	_CntH	= r15	; /

.def	_Loop	= r20	: Loop counter
.def	_PgPtL	= r21	; Page read counter
.def	_PgPtH	= r22	; /
.def	_LoopL	= r21	; 24bit loop counter
.def	_LoopM	= r20	; 
.def	_LoopH	= r22	; /

.def	_PbStat	= r23	; PlayBack stetus (b0:Pause, b1:Playing, b2:EOT)

.def	_Err	= r25	; Error status 
			; 0: No error
			; 1: Unknown SM
			; 2: Unformat