init_mcu.asm

Source code for micro printer driver

;************Setting config register and I/O port, interruptions*******
;PTB0,1,2,3,4 AS DOT0,1,2,3,4 PTB5 TO CONTROL DC-DC CONVERTER 
;PTD0,1,3 AS DOT5,6&MOTOR DRIVER SIGNAL PTD4 AS INPUT CAPTURE
;PTA2 AS KEY IN FOR TEST LR
;OSC 4.9152MHz


CONFIG1INIT	EQU	$01
CONFIG2INIT	EQU	$00
INTSCRINIT	EQU	$02

PORTAINIT	EQU	$21			;PS DISABLED BUSY LED NO LIGHT
DDRAINIT	EQU	$F3			;PTA3 As input Home Switch/PTA2 for manual 2 LR
PORTBINIT	EQU	$80			;FRAM WRITE PROTECTED
DDRBINIT	EQU	$FF			;ALL OUTPUT
PORTDINIT	EQU	$00
DDRDINIT	EQU	$3F			;ALL OUTPUT EXCEPT TXD&RXD


;============INTERNAL CONSTANT DEFINITION===============
cbSCC1_INI		EQU	$40			;
cbSCC2_INI		EQU	$2C			; 00101100
cbSCC3_INI		EQU	$03			; Error interrupt enabled
cbSCBR_INI		EQU	$02			;04/4800 Or #$21
;-------------------------------------------------------
$MACRO	M_UART_INIT_JL8					;
	MOV	#cbSCC1_INI,SCC1			;%01000000($40), Enable SCI
							;Bit0: Parity Bit; 0: Even, 1: Odd
							;Bit1: Parity Enable Bit
							;Bit2: Idle Line Type Bit
							;Bit3: Wakeup Condition Bit
							;Bit4: Mode Bit
							;Bit5: Transmit Inversion Bit
							;Bit6: Enable SCI Bit
							;Bit7: Loop Mode Select Bit
							;
	MOV	#cbSCC2_INI,SCC2			;%00101100($2C), Enable Txd/Rxd & RxD Interrupt
							;Bit0: Send Break Bit
							;Bit1: Receiver Wakeup Bit
							;Bit2: Receiver Enable Bit
							;Bit3: Traansmitter Enable Bit
							;Bit4: Idle Line Interrupt Enable Bit
							;Bit5: SCI Receive Interrupt Enable Bit
							;Bit6: Transmission Complete Interrupt Enable Bit
							;Bit7: SCI Transmit Interrupt Enable Bit
							;
	MOV	#cbSCC3_INI,SCC3			;%00000010($02), Enable Framing Error Interrupt
							;Bit0: Receiver Parity Error Interrupt Enable Bit
							;Bit1: Receiver Framing Error Interrupt Enable Bit
							;Bit2: Receiver Noise Error Interrupt Enable Bit
							;Bit3: Receiver Overrun Interrupt Enable Bit
							;Bit4: DMA Transfer Enable Bit
							;Bit5: DMA Receive Enable Bit
							;Bit6: Transmitted Bit 8
							;Bit7: Received Bit 8
	MOV	#cbSCBR_INI,SCBR			;%00010100($14), Set baud rate at 2400bps
							;Bit0: Baud Rate Select Bits(0,1,2)
							;Bit1:
							;Bit2:
							;Bit3:
							;Bit4: Baud Rate Prescale Bits(0,1)
							;Bit5:
							;Bit6: Reserved
							;Bit7: Reserved
$MACROEND						;
;-------------------------------------------------------

;****************************************************************;
$MACRO	M_INIT_VARS
;	MOV	#RCV_OK,SND_BUFFER			;INIT TO RCV DATA
	MOV	#$00,F_STATUS
	MOV	#$00,PRINT_STATUS
$MACROEND	
;****************************************************************;

S_MCU_INIT:
	MOV	#CONFIG1INIT,CONFIG1		;LVI enabled COP disabled
	MOV	#CONFIG2INIT,CONFIG2
	MOV	#INTSCRINIT,INTSCR
	
	MOV	#PORTAINIT,PORTA
	MOV	#DDRAINIT,DDRA
	
	MOV	#PORTBINIT,PORTB
	MOV	#DDRBINIT,DDRB
	
	MOV	#PORTDINIT,PORTD
	MOV	#DDRDINIT,DDRD
	

	MOV	#$00,KBSCR			;KBIE INITIALIZATION
	MOV	#$04,KBIER			;PTA2 AS KB INTERUPPT /?
	
	MOV     #$31,T1SC
	MOV	#$44,T1SC0			;TIM INITIALIZATION,T1CH0(PTD4) AS INPUT CAPTURE
	MOV     #$01,T1SC
	MOV	#$02,INTSCR			;IRQ interrupt disabled
	
	M_UART_INIT_JL8				;Initialize JL8 SCI
	
	M_INIT_VARS
	BSET	FRAM_CLK,PTB
	BSET	FRAM_SDA,PTB
;	BSET	FIRST_ENTER,TEST_FLAGS
;	MOV	#$01,WR_INDEX
	BCLR	STOP_MOTOR,F_STATUS		;TEST 11/09/2004
	BCLR	PS_SD,PTA
	RTS