Source Code:

    

      

      	;.INCLUDE "M32DEF.INC"

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

	CALL	I2C_INIT			
	CALL	I2C_START			
	LDI	R27, 0b11010000		
	CALL	I2C_WRITE		
	LDI	R27, 0b11110000		
	CALL	I2C_WRITE		
	CALL I2C_STOP			

HERE:	RJMP	HERE

;*********************************************************
I2C_INIT:
	LDI	R21, 0
	OUT	TWSR,R21	
	LDI	R21, 0x47	
	OUT	TWBR,R21	
	LDI	R21, (1<<TWEN)	
	OUT	TWCR,R21		
	RET

;*********************************************************
I2C_START:
	LDI	R21, (1<<TWINT)|(1<<TWSTA)|(1<<TWEN)
	OUT	TWCR,R21		
WAIT1:
	IN	R21, TWCR		
	SBRS	R21, TWINT	
	RJMP	WAIT1		
	RET

;*********************************************************
I2C_WRITE:
	OUT	TWDR, R27
	LDI	R21, (1<<TWINT)|(1<<TWEN)
	OUT	TWCR, R21
WAIT3:
	IN	R21, TWCR			
	SBRS	R21, TWINT		
	RJMP	WAIT3			
	RET

;*********************************************************
I2C_STOP:
	LDI	R21, (1<<TWINT)|(1<<TWSTO)|(1<<TWEN)
	OUT	TWCR, R21	
	RET