PIC32MX: Digital Outputs
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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 NU32. swUser must be defined for a switch (digital input) if not using NU32.
/******************************************************************** Super simple Digital Output. ********************************************************************/ #include "HardwareProfile.h" // NOTE THAT BECAUSE WE USE THE BOOTLOADER, NO CONFIGURATION IS NECESSARY // THE BOOTLOADER PROJECT ACTUALLY CONTROLS ALL OF OUR CONFIG BITS // Define constants for PINS D1 - D4 #define PIN_D1 LATDbits.LATD1 #define PIN_D2 LATDbits.LATD2 #define PIN_D3 LATDbits.LATD3 #define PIN_D4 LATDbits.LATD4 int main(void) { // Set all analog pins to be digital I/O // This line of code only needs to be used if your pins are Analog Input (B port) AD1PCFG = 0xFFFF; // Configure the proper PB frequency and the number of wait states SYSTEMConfigPerformance(SYS_FREQ); //Set D1, D2, D3, and D4 as a digital output LATD |= 0x001E; TRISD &= 0xFFE1; while(1) { if(swUser) { PIN_D1 = 1; PIN_D2 = 0; PIN_D3 = 1; PIN_D4 = 0; } else { PIN_D1 = 0; PIN_D2 = 1; PIN_D3 = 0; PIN_D4 = 1; } } }