void analog_output()                //d1 input from do_next_ao //d1 contains data and d2 contains channel number
{

	uint8_t byte;
        unsigned short int d1 = 0x7FF;  //value changed on 19/3  on 4.18pm//changed by seeing the datasheet previous value 7ff

        printInt(ReadByte(a6,ao_data));

	byte = 0xCF & ReadByte(a6,ao_data);
	WriteByte(a6,ao_data,byte); //make ENEXP and ENLOC to 0
        printInt(byte);
        printInt(ReadByte(a6,ao_data));
        delay_us(3);
	//d1 = _rotlhw(d1,4);//hi nibble	//ns/ls/0/ms

	WriteByte(a6,ao_data,(d1 >> 8) & 0x0f); //output Ms

	printInt(d1 >> 8 & 0xf);
	printInt(ReadByte(a6,ao_data));    //added on 15/3/2018

	delay_us(3);

	WriteByte(a6,ao_cntl,0x3 | 0x08);                         //added this code on 19/3/2018 to set muxen bit high
	delay_us(1);

	printInt(ReadByte(a6,ao_cntl));

	WriteByte(a6,ao_cntl,2  | 0x08); //strobe msb

	delay_us(1);
	printInt(ReadByte(a6,ao_cntl));


	delay_us(1);
	printInt(ReadByte(a6,ao_cntl));

        //added on 15/3/2018
        // d1 = d1 >> 8; //0/00/ns/ls
	WriteByte(a6,ao_data, (d1 >> 4 & 0x0f) | 0x40); //middle nibble

	printInt((d1 >> 4 & 0x0f));
	printInt(ReadByte(a6,ao_data));   //added on 15/3/2018

	delay_us(3);
	WriteByte(a6,ao_cntl,3 | 0x08); //strobe msb

	delay_us(1);
	printInt(ReadByte(a6,ao_cntl));   //added on 15/3/2018
	WriteByte(a6,ao_cntl,2 | 0x08);

	delay_us(1);
	printInt(ReadByte(a6,ao_cntl));    //added on 15/3/2018


	WriteByte(a6,ao_data,(d1 & 0x0f) | 0x80 ); //output lsb

	//alt_putstr("\nDAC nibble3:");
	printInt(d1 & 0x0f);
	printInt(ReadByte(a6,ao_data));  //added on 15/3/2018

	delay_us(3);
	WriteByte(a6,ao_cntl,3 | 0x08 ); //strobe msb

	delay_us(1);
	printInt(ReadByte(a6,ao_cntl));  //added on 15/3/2018
	WriteByte(a6,ao_cntl,2 | 0x08);

	delay_us(1);
	printInt(ReadByte(a6,ao_cntl));  //added on 15/3/2018


	WriteByte(a6,ao_data,0);    //Changed the channel number on 8.15pm                       //output mux
	delay_us(3);
	WriteByte(a6,ao_data,0xd0);  //changed the channel number on 8.15pm                     //output ena
	printInt(ReadByte(a6,ao_data));   //added on 15/3/2018

}