PIC32MX: Digital Outputs - Revision history

Andrew Long: /* Digital Output Example */

2010-01-05T20:40:59Z

Digital Output Example

← Older revision		Revision as of 15:40, 5 January 2010
Line 55:		Line 55:

	<br>		<br>

	===Circuit Diagram===

Andrew Long at 20:40, 5 January 2010

2010-01-05T20:40:39Z

@@ Line 1: / Line 1: @@
 Working with digital inputs and outputs is fundamental to circuit design, and PIC microcontrollers add versatility to design by allowing programming and re-programming of the logic associated with input and output pins.  In this way, one PIC microcontroller can take the place of many pre-programmed digital logic ICs.
 ==Digital Output Example==
 This section describes how to set up and write digital outputs using a PIC32MX460F512L.
 ===Sample Code===
-Program to turn on LEDs based on User Switch of UBW32. swUser must be defined for a switch [[PIC32MX460F512L : Digital Inputs |(digital input) ]] if not using UBW32.
+Program to turn on LEDs based on User Switch of NU32. swUser must be defined for a switch [[PIC32MX460F512L : Digital Inputs |(digital input) ]] if not using NU32.
 <br>

Andrew Long: PIC32MX460F512L : Digital Outputs moved to PIC32MX: Digital Outputs

2009-08-13T15:31:43Z

PIC32MX460F512L : Digital Outputs moved to PIC32MX: Digital Outputs

← Older revision	Revision as of 10:31, 13 August 2009
(No difference)

Andrew Long: /* Sample Code */

2009-07-30T15:32:09Z

Sample Code

← Older revision		Revision as of 10:32, 30 July 2009
Line 49:		Line 49:
	PIN_D6 = 1;		PIN_D6 = 1;
	PIN_D7 = 0;		PIN_D7 = 0;
			}
	}
	else		else
			{
	{
	PIN_D4 = 0;		PIN_D4 = 0;
	PIN_D5 = 1;		PIN_D5 = 1;

Andrew Long: /* Digital Output Example */

2009-07-30T15:31:44Z

Digital Output Example

← Older revision		Revision as of 10:31, 30 July 2009
Line 40:		Line 40:


	Use while to set up infinite loop. What we're going to do is blink ~~an LED~~ on the board on and off depending on whether ~~or not~~ the ~~digital~~ ~~input~~ is ~~high or low~~.		Use while to set up infinite loop. What we're going to do is blink LEDs on the board on and off depending on whether the user switch is pressed.
	while(1)		while(1)
	{		{

Andrew Long: /* Sample Code */

2009-07-30T15:30:59Z

Sample Code

← Older revision		Revision as of 10:30, 30 July 2009
Line 48:		Line 48:
	PIN_D5 = 0;		PIN_D5 = 0;
	PIN_D6 = 1;		PIN_D6 = 1;
	PIN_D7 = 0;		PIN_D7 = 0;
	}		}
	else		else
Line 60:		Line 60:
	} // end main		} // end main
	<br>		<br>

	===Circuit Diagram===		===Circuit Diagram===

Andrew Long: New page: Working with digital inputs and outputs is fundamental to circuit design, and PIC microcontrollers add versatility to design by allowing programming and re-programming of the logic associa...

2009-07-30T15:29:40Z

New page: Working with digital inputs and outputs is fundamental to circuit design, and PIC microcontrollers add versatility to design by allowing programming and re-programming of the logic associa...

New page

Working with digital inputs and outputs is fundamental to circuit design, and PIC microcontrollers add versatility to design by allowing programming and re-programming of the logic associated with input and output pins. In this way, one PIC microcontroller can take the place of many pre-programmed digital logic ICs.
==Available Pins==
<br><br>
==Digital Output Example==
This section describes how to set up and write digital outputs using a PIC32MX460F512L.
===Sample Code===
Program to turn on LEDs based on User Switch of UBW32. swUser must be defined for a switch [[PIC32MX460F512L : Digital Inputs |(digital input) ]] if not using UBW32.

First include header files with definitions for generic type definitions, compiler, and for specific PIC. Also include the plib header file.

#include "GenericTypeDefs.h"
#include "Compiler.h"
#include "HardwareProfile.h"
#include <plib.h>

NOTE THAT BECAUSE WE USE THE BOOTLOADER, NO CONFIGURATION IS NECESSARY. THE BOOTLOADER PROJECT ACTUALLY CONTROLS ALL OF OUR CONFIG BITS.

Define a constants for 4 output pins. LATx is the function used to write to a pin.
#define PIN_D4 LATDbits.LATD4
#define PIN_D5 LATDbits.LATD5
#define PIN_D6 LATDbits.LATD6
#define PIN_D7 LATDbits.LATD7

Begin main body of program.
int main(void){

Configure the proper PB frequency and number of wait states in this case 80MHz.
SYSTEMConfigPerformance(80000000L);

Set all analog pins to be digital I/O
AD1PCFG = 0xFFFF;

Turn off JTAG so we get the pins back
mJTAGPortEnable(0);

The pins that we want to use as outputs must be initialized as an outputs. TRISx is a register that sets the pin as an input (1) or an output(0). You can set entire ports as inputs / outputs by using TRISX &= Hex number; We use &= hex number to only change the pins that we want to set as inputs / outputs.

Set D4, D5, D6, and D7 as a digital outputs
LATD |= 0x00F0; TRISD &= 0xFF0F;

Use while to set up infinite loop. What we're going to do is blink an LED on the board on and off depending on whether or not the digital input is high or low.
while(1)
{
if(swUser)
{
PIN_D4 = 1;
PIN_D5 = 0;
PIN_D6 = 1;
PIN_D7 = 0;
}
else
{
PIN_D4 = 0;
PIN_D5 = 1;
PIN_D6 = 0;
PIN_D7 = 1;
}
}
} // end main
<br>
===Circuit Diagram===