void singecommandshout(unsigned char serialout); //new proc

int init_driver() /*Driver initialisation program start here */
{
//??????????????? not needed start(); //start command to HT16K33
//???????? to which I2C address/device You send this ?
////////////////shout(0x00); //display data address pointer

singecommandshout(0x21); //Turns on internal oscillator
singlecommandshout(0x81); //Display on blinking off
singlecommandshout(0xef); //Dimming set to 16/16
////////????????????? not needed stop();
////////////////////SDA = 1;
///////////////////SCL = 1;
}


void singecommandshout(unsigned char serialout)
{start();
shout(0xe0); //address of chip
shout(serialout);
stop();
}


int outdata() /*Driver initialisation program start here */
{
start(); //start command to HT16K33
shout(0xe0); //slave address
shout(0x01); //command reg address byte display address set to 0x01
shout(0x55); //data byte 4 segnent turns on & 4 turns off
stop(); //stop command
////////SDA = 1; //not needed
/////////SCL = 1; //not needed
}


stop() //stop subroutine for HT16K33
{
SDA = 0;
SCL = 1;
_nop_();
SDA = 1;
_nop_();
_nop_();
_nop_();
}

start() //start subroutine for HT16K33
{
SDA = 1;

SCL = 1;
_nop_();
SDA = 0;
_nop_();
_nop_();
SCL = 0;
_nop_();
}

int shout(unsigned char serialout) //Data transfer to HT16K33 subroutine
{
unsigned char eepromcounter;
eepromcounter = 0x08; //8 bit data transmission so counter loaded with 0x08
while(eepromcounter) //while counter does not become 0 out data to 16K33
{


//??????????
//Are You Sure that CY receives bit 7 in shifting below??????
// It can be , nbut depends on compiler, compiler can do this
// without C flag:
// mov a,serialout
// rl a
// anl a,#0feh
// mov serialout,a

serialout = serialout << 1; //left shift datareg
_nop_();
SDA = CY; //move carry on SDA line
//better is
if (serialout && 0x80) SDA=1 else SDA=0;
serialout=serialout<<1;

_nop_();
SCL = 1; //give clock pulse
_nop_();
_nop_();
_nop_();
_nop_();
SCL = 0;
--eepromcounter; //decrement the counter by 1

}
SDA = 1; //make SDA high
_nop_();
_nop_();
SCL = 1; //give clock pulse
_nop_();
_nop_();
SCL = 0;
}