;*******************************************************************************
; FILENAME	: LCD.ASM
; AUTHOR	: SONiX
; PURPOSE	: Test LCD function. In order to enable LCD function, first we enable
;		  the LCD controller by Code Option to enable COM0~COM2, SEG16~SEG23.
;		  Second, enable segment pin share with P3 and P6. Finally, the value
;		  we want to show are written into RAM Bank 15.
; REVISION	: 28/01/2003 V1.0	First issue
;*******************************************************************************
;*  (c) Copyright 2003, SONiX TECHNOLOGY CO., LTD.
;*******************************************************************************
CHIP	SN8P1808					; Select the CHIP
//{{SONIX_CODE_OPTION
	.Code_Option	OSG		Enable
	.Code_Option	High_Clk	4M_X'tal
	.Code_Option	High_Clk/2	Disable
	.Code_Option	Security	Enable
	.Code_Option	LVD		Enable
	.Code_Option	LCD		Enable
	.Code_Option	Watch_Dog	Enable
//}}SONIX_CODE_OPTION

;-------------------------------------------------------------------------------
;			Include Files
;-------------------------------------------------------------------------------
.nolist							; do not list the macro file

	INCLUDESTD	MACRO1.H
	INCLUDESTD	MACRO2.H
	INCLUDESTD	MACRO3.H

.list							; Enable the listing function

;-------------------------------------------------------------------------------
;			Constants Definition
;-------------------------------------------------------------------------------
;	ONE			EQU		1
	num0_1		equ	0feH
	num0_2		equ	0fdH
	num0_3		equ	0feH
	num1_1		equ	0feH
	num1_2		equ	0f8H
	num1_3		equ	0f8H
	num2_1		equ	0faH
	num2_2		equ	0ffH
	num2_3		equ	0fcH
	num3_1		equ	0feH
	num3_2		equ	0ffH
	num3_3		equ	0f8H
	num4_1		equ	0feH
	num4_2		equ	0faH
	num4_3		equ	0faH
	num5_1		equ	0fcH
	num5_2		equ	0ffH
	num5_3		equ	0faH
	num6_1		equ	0fcH
	num6_2		equ	0feH
	num6_3		equ	0feH
	num7_1		equ	0feH
	num7_2		equ	0f9H
	num7_3		equ	0f8H
	num8_1		equ	0feH
	num8_2		equ	0ffH
	num8_3		equ	0feH
	num9_1		equ	0feH
	num9_2		equ	0fbH
	num9_3		equ	0faH
;-------------------------------------------------------------------------------
;			Variables Definition
;-------------------------------------------------------------------------------
.DATA

	org	0h				;Bank 0 data section start from RAM address 0x000
	Wk00B0		DS	1		;Temporary buffer for main loop
	Iwk00B0		DS	1		;Temporary buffer for ISR
	AccBuf		DS	1		;Accumulater buffer
	PflagBuf	DS	1		;PFLAG buffer

	org	100h				;Bank 1 data section start from RAM address 0x100
	BufB1		DS	20		;Temporary buffer in bank 1

;-------------------------------------------------------------------------------
;			Bit Flag Definition
;-------------------------------------------------------------------------------
	Wk00B0_0    	EQU	Wk00B0.0    	;Bit 0 of Wk00B0
	Iwk00B0_1 	EQU	Iwk00B0.1   	;Bit 1 of Iwk00





;-------------------------------------------------------------------------------
;			Code section
;-------------------------------------------------------------------------------

.CODE

	ORG	0				;Code section start
	jmp	Reset				;Reset vector
						;Address 4 to 7 are reserved
	ORG	8
	jmp	Isr				;Interrupt vector

	ORG	10h
;-------------------------------------------------------------------------------
;			Program reset section
;-------------------------------------------------------------------------------
Reset:
	mov	A,#07Fh				;Initial stack pointer and
   	b0mov	STKP,A				;disable global interrupt
    	b0mov	PFLAG,#00h			;pflag = x,x,x,x,x,c,dc,z
	b0mov	RBANK,#00h			;Set initial RAM bank in bank 0
	mov  	A,#40h				;Clear watchdog timer and initial system mode
	b0mov	OSCM,A

    	call 	ClrRAM				;Clear RAM
    	call 	SysInit				;System initial
    	b0bset	FGIE				;Enable global interrupt

;-------------------------------------------------------------------------------
;			Main routine
;-------------------------------------------------------------------------------
Main:
	b0bset	FWDRST				;Clear watchdog timer

	call	MnApp

	jmp	Main

;-------------------------------------------------------------------------------
;			Main application
;-------------------------------------------------------------------------------
MnApp:

	; Put your main program here
	b0bclr	fp3lcd		;Enable SEG8~SEG15 shared with P3
	b0bclr	fp6hseg		;Enable SEG4~SEG7 shared with P6.4~P6.7
	b0bclr	fp6lseg		;Enable SEG0~SEG3 shared with P6.0~P6.3
	b0bset	flenb		;LCD driver
	b0bclr	fblank		;Normal display

	b0mov	rbank,#0fH	;Get into RAM bank 15
	
	mov	A,#num0_1	;Show value 0
	mov	00H,A
	mov	A,#num0_2
	mov	01H,A
	mov	A,#num0_3
	mov 	02H,A
	
	ret

;-----------------------------------
;	Jump table routine
;-----------------------------------
	ORG	0x0100				;The jump table should start from the head 
						;of boundary.
	b0mov	A,Wk00B0              
	and	A,#3
	ADD    	PCL,A
	jmp    	JmpSub0
	jmp    	JmpSub1
	jmp    	JmpSub2
;-----------------------------------


JmpSub0:
	; Subroutine 1
	jmp	JmpExit

JmpSub1:
	; Subroutine 2
	jmp	JmpExit

JmpSub2:
	; Subroutine 3
	jmp	JmpExit

JmpExit:
	ret					;Return Main

;-------------------------------------------------------------------------------
; Isr (Interrupt Service Routine)
; Arguments	: 
; Returns	: 
; Reg Change: 
;-------------------------------------------------------------------------------
/*
Processing multi-interrupt request needs to set the priority of these interrupt requests.
The IRQ flags of the 7 interrupt are controlled by the interrupt event occurring. But the
IRQ flag set doesn't mean the system to execute the interrupt vector. The IRQ flags can be
triggered by the events without interrupt enable. Just only any the event occurs and the 
IRQ will be logic "1".
There are two things need to do for multi-interrupt. One is to make a good priority for
these interrupts. Two is using IEN and IRQ flags to decide executing interrupt service 
routine or not.
*/

Isr:
;-----------------------------------
;	Save ACC and system registers
;-----------------------------------
	b0xch	A,AccBuf			;B0xch instruction do not change C,Z flag
	push					; Save 80h ~ 87h system							

;-----------------------------------
;   Check which interrupt happen
;-----------------------------------

INTP00CHK:					; Check INT0 interrupt request
	B0BTS1	FP00IEN				; Check P00IEN
	JMP	INTP01CHK			; Jump check to next interrupt
	B0BTS0	FP00IRQ				; Check P00IRQ
	JMP	INTP00				; Jump to INT0 interrupt service routine
INTP01CHK:					; Check INT1 interrupt request
	B0BTS1	FP01IEN				; Check P01IEN
	JMP	INTP02CHK			; Jump check to next interrupt
	B0BTS0	FP01IRQ				; Check P01IRQ
	JMP	INTP01				; Jump to INT1 interrupt service routine
INTP02CHK:					; Check INT2 interrupt request
	B0BTS1	FP02IEN				; Check P02IEN
	JMP	INTT0CHK			; Jump check to next interrupt
	B0BTS0	FP02IRQ				; Check P02IRQ
	JMP	INTP02				; Jump to INT2 interrupt service routine
INTT0CHK:					; Check T0 interrupt request
	B0BTS1	FT0IEN				; Check T0IEN
	JMP	INTTC0CHK			; Jump check to next interrupt
	B0BTS0	FT0IRQ				; Check T0IRQ
	JMP	INTT0				; Jump to T0 interrupt service routine
INTTC0CHK:					; Check TC0 interrupt request
	B0BTS1	FTC0IEN				; Check TC0IEN
	JMP	INTTC1CHK			; Jump check to next interrupt
	B0BTS0	FTC0IRQ				; Check TC0IRQ
	JMP	INTTC0				; Jump to TC0 interrupt service routine
INTTC1CHK:					; Check TC1 interrupt request
	B0BTS1	FTC1IEN				; Check TC1IEN
	JMP	INTSIOCHK			; Jump check to next interrupt
	B0BTS0	FTC1IRQ				; Check TC1IRQ
	JMP	INTTC1				; Jump to TC1 interrupt service routine
INTSIOCHK:					; Check SIO interrupt request
	B0BTS1	FSIOIEN				; Check SIOIEN
	JMP	INT_EXIT			; Jump to exit of IRQ
	B0BTS0	FSIOIRQ				; Check SIOIRQ
	JMP	INTSIO				; Jump to SIO interrupt service routine


;-----------------------------------
; Exit interrupt service routine
;-----------------------------------

INT_EXIT:

	pop					; Restore 80h ~ 87h system registers			
	b0xch	A,AccBuf			; B0xch instruction do not change C,Z flag

	reti					; Exit the interrupt routine



;-------------------------------------------------------------------------------
;	INT0 interrupt service routine
;-------------------------------------------------------------------------------
INTP00:
	b0bclr	FP00IRQ

	;Process P0.0 external interrupt here

	jmp	INT_EXIT
;-------------------------------------------------------------------------------
;	INT1 interrupt service routine
;-------------------------------------------------------------------------------
INTP01:
	b0bclr	FP01IRQ

	;Process P0.1 external interrupt here

	jmp	INT_EXIT
;-------------------------------------------------------------------------------
;	INT2 interrupt service routine
;-------------------------------------------------------------------------------
INTP02:
	b0bclr	FP02IRQ

	;Process P0.2 external interrupt here

	jmp	INT_EXIT
;-------------------------------------------------------------------------------
;	T0 interrupt service routine
;-------------------------------------------------------------------------------
INTT0:
	b0bclr	FT0IRQ

	;Process T0 internal interrupt here

	jmp	INT_EXIT
;-------------------------------------------------------------------------------
;	TC0 interrupt service routine
;-------------------------------------------------------------------------------
INTTC0:
	b0bclr	FTC0IRQ

	;Process TC0 timer interrupt here

	jmp	INT_EXIT
;-------------------------------------------------------------------------------
;	TC1 interrupt service routine
;-------------------------------------------------------------------------------
INTTC1:
	b0bclr	FTC1IRQ

	;Process TC1 timer interrupt here

	jmp	INT_EXIT
;-------------------------------------------------------------------------------
;	SIO interrupt service routine
;-------------------------------------------------------------------------------
INTSIO:
	b0bclr	FSIOIRQ

	;Process SIO interrupt here

	jmp	INT_EXIT

;-------------------------------------------------------------------------------
;	SysInit
; 	Initialize I/O, Timer, Interrupt, etc.
;-------------------------------------------------------------------------------
SysInit:
	
	ret

;-------------------------------------------------------------------------------
; ClrRAM
; Use index @YZ to clear RAM  (00h~7Fh)
;-------------------------------------------------------------------------------

ClrRAM:

; RAM Bank 0
	clr	Y    				;Select bank 0 
	b0mov	Z,#0x7f				;Set @YZ address from 7fh

ClrRAM10:
	clr	@YZ				;Clear @YZ content
	decms	Z  				;z = z - 1 , skip next if z=0
	jmp	ClrRAM10
	clr 	@YZ				;Clear address 0x00

; RAM Bank 1
	mov	A,#1
	b0mov	Y,A				;Select bank 1
	b0mov	Z,#0x7f				;Set @YZ address from 17fh

ClrRAM20:
	clr	@YZ				;Clear @YZ content
	decms	Z				;z = z - 1 , skip next if z=0
	jmp 	ClrRAM20
	clr 	@YZ				;Clear address 0x100
	ret

;-------------------------------------------------------------------------------
	ENDP