[HELP] PIC18F4550 -- C Programming Problems

[scdvom]

Hi, I got a problems here. Here is my code

#include <P18F4550.h>

void main (void)
{
TRISB = 0;	//Make port B as output
PORTB = 0xFF;
}

when I check d Logic Analyzer (waveform), how come it just trigered wif pin 5,6, and 7 only. then hw pin 1,2,3,4?? i tot 0xFF is all turning on??

can any help me to solve tis problem. thx

 

[betwixt]

Are all the pins configured to be digital outputs? Most have more than one use and you may for example, have them configured as analog inputs.

Brian.

 

[scdvom]

erm..no...hw can I configure all to be digital outputs??
thx 4 helping

 

[Tahmid]

Hi scdvom,
RB0...4 are configured as analog pins. To configure them as digital, add this to your code:

   ADCON1 = 7; //Turn off ADC module

Hope this helps.
Tahmid.

 

[scdvom]

hi, Tahmid. thx 4 ur helping again.its work.thx..^^
erm..I got another question here..like I wan to convert decimal form to hex form.can do I make it?

int x
x=3 //actually = 11
y=x //bt y i wish to show "11"...so wat should declare on y??

char y ???

Added after 9 minutes:

sorry..is decimal to binary..

 

[Tahmid]

Where do you want to display binary?
At PORTB, binary is displayed.
If you mean write binary, I think you write it like this:

int x; //Or char x
x = 0b11;
y = x;

Hope this helps.
Tahmid.

 

[scdvom]

here is my code...

void masterStateMachine(void)
{
	unsigned char fbBits, lrBits, masterBits;

	fbBits = fb.controlBits;				//(fb fb)
	lrBits = lr.controlBits;					//(lr lr)
	masterBits = (fbBits<<2)+(lrBits);		//(fb fb)(lr lr)
 	
	/*
	00:Rest
	01:Forward/Left
	10:Reverse/Right
	*/
	
	switch(masterBits)
	{
		case 0: stop(); break;
		case 1: turnLeft(); break;
.
.
.
.

fb.controlBits and lr.controlBits both are either 0,1, or 3..bt when I wanna store inside fbBits nad lrBits...i need to be binary form.

thx 4 helping

 

[btbass]

As far as an unsigned char is concerned, it can only store a binary number????

decimal 3 is stored as 00000011

hex 0x03 is stored as 00000011

It's a matter of interpretation.

PS
Your code doesn't look like a State machine implementation. Looks more like a loop?