interrup.inc

rf2401基于AVR单片机的源码

Ext_Int0:   	ldi     tempi,0x00
	    	out	GIMSK,tempi	    	; disable INT0 & INT1
		rjmp    reset

Tim0_OVF:	nop	
		in	flags,sreg
		reti

UART_RXC:	in	flags,sreg
		in	tempi,UDR
		mov	address,data1
		mov	data1,data2
		mov	data2,checkz
		mov	checkz,tempi
		ldi	tempi,Code
		eor	checkz,tempi
		out	sreg,flags
		reti


Reset:		ldi	temp,Low(RAMEND)
		out	SPL,temp		; Set stack pointer to last internal RAM location
		ldi	temp,High(RAMEND)
		out	SPH,temp

		ldi	temp,0b10011000
		out	UCR,temp		; 
;		ldi	temp,BRR		
		ldi	temp,0x07
		out	UBRR,temp		; 

		ldi	temp,timerval
		out	TCNT0,temp
		ldi	temp,3
		out	TCCR0,temp
		ldi	temp,2
		out	TIMSK,temp

; modify PortA, PA.0~PA.3 as input button, PA.4~PA.7 as output LED
		ldi	temp, 0b11110000	; pin 4-7 are output, 0-3 are input, portA	
		out	DDRA,temp
                ldi     temp,0xff
                out     PortA,temp              ;close all LED

; 2003.1.7  below instr is close for 903 test 
;		out	PortC,temp		; turn on pullups on all pins on port C
;


; 2003.1.7  for 903 test 	
; Port C is for 903 control interface	
		ldi	temp, 0b01111111	; pin 5-7 are output, 0-4 are input, portD
		out	DDRC,temp
		sbi	PortC,0			; Pullup on PIN0 of Port C, for C_SENSE input
		clr     temp                    ; ini 903 control port on power on
		out 	PortC,temp
		
;;;;

		ldi	temp, 0b11100000	; pin 5-7 are output, 0-4 are input, portD
		out	DDRD,temp
		sbi	PortD,2			; Pullup on PIN2, Port D.

		clr	counter


TurnOn:		sei
		ldi	channel,2