DSP Applications and Student Projects - Digital Signal Processing and Applications with the C6713 and C6416 DSK - page 366

else if(bandage[n] > 20000) //second threshold

{
toprow[n] = 0x20; //blank space

botrow[n] = 0xFF;
}
else //below second threshold

{
toprow[n] = 0x20;
botrow[n] = 0x20;
}
}
}
void send_LCD_characters()
{
int m=0;
LCD_PUT_CMD(LCD_FIRST_LINE); //start address

for (m=0; m<16; m++) //display top row

LCD_PUT_CHAR(toprow[m]);
LCD_PUT_CMD(LCD_SECOND_LINE); //second line

for (m=0; m<16; m++) //display bottom row

LCD_PUT_CHAR(botrow[m]);
}
void init_LCD()
{
LCD_PUT_CMD(LCD_CTRL_INIT); //put command

LCD_PUT_CMD(LCD_CTRL_OFF); //off display

LCD_PUT_CMD(LCD_CTRL_ON); //turn on

LCD_PUT_CMD(0x01); //clear display

LCD_PUT_CMD(LCD_AUTOINC); //set address mode

LCD_PUT_CMD(LCD_CTRL_ON); //set it

}
void LCD_PUT_CMD(int data)
{
*ioport = (data & 0x000000FF);

//RS=0, RW=0

delay();
*ioport = (data | 0x20000000); //bring enable line high

delay();
*ioport = (data & 0x000000FF); //bring enable line low

delay();
}
void LCD_PUT_CHAR(int data)
{
*ioport = ((data & 0x000000FF)| 0x80000000); //RS=1, RW=0
*ioport = ((data & 0x000000FF)| 0xA0000000); //enable high
*ioport = ((data & 0x000000FF)| 0x80000000); //enable Low
delay();
}
void delay() //create 1 ms delay

{
int q=0, junk=2;
for (q=0; q<8000; q++)

junk = junk*junk;

}

FIGURE 10.13. ( Continued )