void putsLCD (char *ptr)
{
while (*ptr) {
putcLCD(*ptr);
delayby50us(1);
ptr++;
}
}
void putsLCD (char *ptr) { //display a string of characters to LCD
while (*ptr) { //checks for end of string (null character)
putcLCD(*ptr); //send each individual char to putcLCD
ptr++; //go to next char
}
}
void main(void) {
unsigned int i,b;
unsigned long int n, q, k[3];
char j=0;
char *msg1,*msg2,*msg3,*msg4; //messages to display
msg1 = "Enter decimal:";
msg2 = "Hex conversion:";
msg3 = "Not valid input";
msg4 = "Max range 65535";
start:
n = 0; //initialize to 0
q = 5; //initialize to not 0
openLCD(); //turn LCD on
cmd2LCD(0x01); //clear LCD
delayms(10); //wait of LCD to clear
putsLCD(msg1); //display first message
cmd2LCD(0xC0); //go to second line
while (1)
{
keyin:
i= getkey1(); //get key from keypad
delayms(10); //wait to ensure debounce
if(i == 0x0A) { //if i=A (enter key)
goto dec2hex; //convert decimal to hex
}
else if (i > 0x0A) { //if i not a valid input
cmd2LCD(0x01); //clear LCD
delayms(10); //wait for LCD to be cleared
putsLCD(msg3); //display third message
exit(); //exit program
}
if((n*10+i) > 0xFFFF) { //if n exceeds limit
cmd2LCD(0x01); //clear LCD
delayms(10); //wait for LCD to be cleared
putsLCD(msg4); //display message 4
exit();
}
j= (char)i; //turn i into char
j=j+0x30; //convert hex to ASCII
putcLCD(j); //display ASCII to LCD
n = n*10 +i; //keep track of decimal value
delayms(5);
goto keyin; //get another key
dec2hex:
cmd2LCD(0x01); //clear LCD
delayms(10); //wait for LCD to clear
putsLCD(msg2); //display message 2
cmd2LCD(0xC0); //go to second line
b = 0; //set b to 0
while(q != 0) { //while quotient is not 0
q = n/16; //quotient is equal to number/16
k[b] = n%16; //store remainder in array
n /= 16; //new number value
b ++;
}
while(b !=0) { //display array values to LCD
b --; //decrease b
if(k[b] < 10) { //if number add 0x30 for ASCII
k[b] = k[b] + 0x30;
} else { //if letter add 0x37 for ASCII
k[b] = k[b] + 0x37;
}
putcLCD((char)k[b]); //display ASCII to LCD
}
exit();
}
}
