init.h

this base on DSP a iir design

	.title	"Include file with I/O register declarations"
*	file: INIT.h
*	funtion: register address declaraction
*==================================================================
	.mmregs				;Include reserved words
*	.bss	dmem,10			;Undefined Variables space
*	.def	ini_d,start,codtx	;Directive for symbl address
					;generation in the current module
					;-optional
*ini_d:	.usect	"new",10		;Example of undefined varibal space
					;with the segment's name as "new"
*	.data				;Example of including dummy constants
					;-optional
*	.word	055aah
*	.word	0aa55h

* On-chip register equates
* CLKOUT
CLK1	.set	0ffe8h
* Interrupt control
ICR	.set	0ffech
* SYNC port
SDTR	.set	0fff0h
SSPCR	.set	0fff1h
* UART
ADTR	.set	0fff4h
ASPCR	.set	0fff5h
IOSR	.set	0fff6h
BRD	.set	0fff7h
* TIMER
TCR	.set	0fff8h
PRD	.set	0fff9h
TIM	.set	0fffah
* Wait states
WSGR	.set	0fffch
* Variables
RXBUF	.set	0300h
SIZE	.set	0020h
DEL	.set	0010h
*
* Saram mode
PMST	.set	0ffe4h
*
* interrupt-flag register
*IFR	.set	00006h
*
* Global-memory allocation register
*GREG	.set	00005h
*
* interrupt-mask register
*IMR	.set	00004h
*
* clkout1 on or off
*CLK	.set	0ffe8h
*
* interrupt-control register
*icr	.set	0ffech
*
*
;****************************************
; Expand stake : pop
stkpop	.macro
	mar	*,ar7
	lar	ar7,#370h
	rpt	#6h
	popd	*+
	.endm
*
; Expand stake : push
stkpush	.macro
	mar	*,ar7
	lar	ar7,#370h+7
	rpt	#6h
	pshd	*-
	.endm
;****************************************
*=====================================================================
*  mdiv computting (A * C / B)  import:   A:302h  B:303h C:304h
*  			        output:   quotient:302h remainder:303h
*=====================================================================
mdiv	.macro
	ldp	#6h		; point to B1 300h
	lt	02h		; SARAM[302h]-->T reg
	mpyu	04h		; [302h]*[304h]-->P reg
	clrc	SXM		;suppresses sign-extension
	lacl	#0h		; clear ACC
	spm	00
	sph	02h		; [302h]=P[31..16]
	spl	04h		; [304h]=P[15..0]
	mpya	*		; ACC = P
	sub	03h		; [302h]*[304h](ividend) > [303h](divisor) ?
	bcnd	div?,C		; yes, jump div?
	clrc	SXM		;suppresses sign-extension
	lacl	#00h		; no, quotient = 0 --> accl
	add	04h,16          ; and remainder = P[15..0] --> acch
	b	comple?
div?:
	clrc	SXM		;suppresses sign-extension
	lacl	04h		; ACCL=PL
	add	02h,16		; ACCH=PH
	rpt	#15		; using subc to complete division
	subc	03h
comple?:
	sacl	02h		; accl=quotient
	sach	03h		; acch=remainder
	.endm
*=================================================