.INCLUDE "M32DEF.INC"

	LDI	R21,HIGH(RAMEND)
	OUT	SPH,R21
	LDI	R21,LOW(RAMEND)
	OUT	SPL,R21

	LDI	R21, 0xFF		
	OUT	DDRA,R21		


	CALL	I2C_INIT	
	CALL	I2C_LISTEN	
	CALL	I2C_READ	
	OUT	PORTA,R27		

HERE:
	RJMP	HERE		

;*********************************************************

I2C_INIT:
	LDI	R21, 0x10		
	OUT	TWAR,R21		
	LDI	R21, (1<<TWEN)	
	OUT	TWCR,R21		
	LDI	R21, (1<<TWINT)|(1<<TWEN)|(1<<TWEA)
	OUT	TWCR,R21		
	RET

;*********************************************************

I2C_LISTEN:
W1:	
	IN	R21, TWCR		
	SBRS	R21, TWINT	
	RJMP	W1			
	RET

;*********************************************************

I2C_READ:
	LDI	R21, (1<<TWINT)|(1<<TWEN)|(1<<TWEA)
	OUT	TWCR, R21		
W2:	IN	R21, TWCR		
	SBRS	R21, TWINT	
	RJMP	W2			
	IN	R27,TWDR		
	RET