need advise using a random no and incl. switch command

[BigT]

I have 3 questions to the code below which is pretty messed up (newby).
the program should pull a random number between 1-6 when i push a button and show it on an LCD (button and LCD are set up)
1. how do i include the switch correctly
2. how do i set up a random number counter
3. how do read the number when i push the button and link the random no. to the LCD equivalent.

Any help appreciated.

#define BUTTON	RA4

#define HIGH	0	// Button is a pull down 
#define LOW		1   // Button is a pull down

#define Frequency	4000000
#define InitDlay	12	

#define	LCDTEST  0b01111111;	// Test LCD
#define	LCD1  0b00000110;	// Bin 1
#define	LCD2  0b01011011;	// Bin 2
#define	LCD3  0b01001111;	// Bin 3
#define	LCD4  0b01100110;	// Bin 4
#define	LCD5  0b01101101;	// Bin 5
#define	LCD6  0b01111100;	// Bin 6

typedef unsigned char uint8_t;





void main (void) 
{
	int RESULT;
	int dlay;
	uint8_t	i;
// intitialize chip 
	TRISA = 0x1F;		// Port A all inputs
	TRISB = 0xFF;		// Port B all output
 		

// Main task loop 
	while (1) 
	{
 	  button_state = BUTTON;	// get current button state	
		
	while(BUTTON == HIGH)	// wait while button isn't pressed
	{	
	
	if ((button_state == LOW) && (last_button_state != HIGH))
	{
(((InitDlay-1)*256)*7)/(Frequency/4);	// debounce button
						
switch (RESULT) 
{
								CASE 1:
								PORTB = LCD1;
								break;

								CASE 2:
								PORTB = LCD2;
								break;
					
								CASE 3:
								PORTB = LCD3;
								break;

								CASE 4:
								PORTB = LCD4;
								break;

								CASE 5:
								PORTB = LCD5;
								break;

								CASE 6: 
								PORTB = LCD6;
								break;

								default:
								PORTB = LCDTEST;
			}

		}
	}
}
	return;	
}

Thanks in advance,
T

[gpraghuram]

2. how do i set up a random number counter
You can use srand() and rand() for this .But it returns double.So you may need to convert this to int.
3. how do read the number when i push the button and link the random no. to the LCD equivalent.
do like this int rand_num = srand()
and rand_num will have the random number in it.

[code=c]
srand ( time(NULL) );
int num = rand() %10

[/code]

Thanks
Raghuram

[BigT]

Thanks Raghuram for your answer.

Could you give me a hint how i set the smallest no1 and the biggest to 6

Thanks

T

[gpraghuram]

Thanks Raghuram for your answer.

Could you give me a hint how i set the smallest no1 and the biggest to 6

Thanks

T

R u asking how will u do it for the random number u are getting?
If u want a single digit random number then try using srand48() and multiply by 10 to get a single digit random number.
After that you can mod it by 6 to get what u want

Thanks
Raghuram

[BigT]

R u asking how will u do it for the random number u are getting?
If u want a single digit random number then try using srand48() and multiply by 10 to get a single digit random number.
After that you can mod it by 6 to get what u want

Thanks
Raghuram

I was trying to say to set a range of 1 trough 6 where 1 is the smallest and 6 the highest number like if you roll a die.

Thx,
T

[gpraghuram]

I was trying to say to set a range of 1 trough 6 where 1 is the smallest and 6 the highest number like if you roll a die.

Thx,
T

Do like this
[code=c]
srand48(time(NU LL));
int num = ((int)(drand48( )*10))%5;
num++;
//num will be like rolling a dice it will return 1 to 6
[/code]

Thanks
Raghuram

[BigT]

Thank you for the help. This answers my questions.

Thomas