PIC32MX: Digital Inputs - Revision history

Andrew Long: /* Digital Inputs Example */

2010-01-05T18:20:35Z

Digital Inputs Example

@@ Line 5: / Line 5: @@
 Program to display push-button input as LED (on board) output
-   #include <plib.h>
+ #include "HardwareProfile.h"
-NOTE THAT BECAUSE WE USE THE BOOTLOADER, NO CONFIGURATION IS NECESSARY. THE BOOTLOADER PROJECT ACTUALLY CONTROLS ALL OF OUR CONFIG BITS.
+ // NOTE THAT BECAUSE WE USE THE BOOTLOADER, NO CONFIGURATION IS NECESSARY
+     while(1)
+     {

Andrew Long at 18:14, 5 January 2010

2010-01-05T18:14:16Z

← Older revision		Revision as of 13:14, 5 January 2010
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.		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 Inputs Example==		==Digital Inputs Example==
	This section uses an example to describe how to set up and read digital inputs using a PIC32MX460F512L.		This section uses an example to describe how to set up and read digital inputs using a PIC32MX460F512L.

Andrew Long: PIC32: Digital Inputs moved to PIC32MX: Digital Inputs

2009-08-13T15:32:52Z

PIC32: Digital Inputs moved to PIC32MX: Digital Inputs

← Older revision	Revision as of 10:32, 13 August 2009
(No difference)

Andrew Long: PIC32MX460F512L : Digital Inputs moved to PIC32: Digital Inputs

2009-08-13T15:30:59Z

PIC32MX460F512L : Digital Inputs moved to PIC32: Digital Inputs

← Older revision	Revision as of 10:30, 13 August 2009
(No difference)

Andrew Long at 17:33, 23 July 2009

2009-07-23T17:33:39Z

← Older revision		Revision as of 12:33, 23 July 2009
Line 33:		Line 33:
	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 an LED on the board on and off depending on whether or not the digital input is high or low.
	while(1)		while(1)
	{		{
	if (INPUT_G0)		if (INPUT_G0)
	{		{

Andrew Long at 17:33, 23 July 2009

2009-07-23T17:33:21Z

← Older revision		Revision as of 12:33, 23 July 2009
Line 31:		Line 31:
	TRISGbits.TRISG0=1;		TRISGbits.TRISG0=1;

	Use while to set up infinite loop.		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)		while(1)
	{		{
	// ~~What~~ ~~we're~~ ~~going~~ to do ~~is blink an LED on and off~~		if (INPUT_G0)
			{
	// depending on whether or not digital input is high or low.
			mLED_3_On();
	if (INPUT_G0)
			}
	{
	~~mLED_3_On();~~		else
			{
	}
		⚫	mLED_3_Off();
	else
			}
	{
⚫	mLED_3_Off();
	}
	}		}
	}		}

Andrew Long at 17:30, 23 July 2009

2009-07-23T17:30:20Z

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 Inputs Example==
This section uses an example to describe how to set up and read digital inputs using a PIC32MX460F512L.
===Sample Code===
Program to display push-button input as LED (on board) output

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 constant INPUT_G0 which reads the digital input. PORTx reads on port x the current value of the pin (in this case G0).
#define INPUT_G0 PORTGbits.RG0

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

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

Initialize the LEDs on the board. This function may be different depending on the hardware profile. This function is for UBW32.
mInitAllLEDs();

The pin that we want to use as an input must be initialized as an input. 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 TRISG &= Hex number; We use &= hex number to only change the pins that we want to set as inputs / outputs.
TRISGbits.TRISG0=1;

Use while to set up infinite loop.
while(1)
{
// What we're going to do is blink an LED on and off
// depending on whether or not digital input is high or low.
if (INPUT_G0)
{
mLED_3_On();
}
else
{
mLED_3_Off();
}
}
}
<br>
===Circuit Diagram===