The xc.h file is the master header file included in all Microchip MPLAB XC Compilers .
Whether you are targeting an 8-bit PIC/AVR, a 16-bit dsPIC, or a 32-bit SAM/PIC32 MCU, this guide details how to correctly acquire, configure, and troubleshoot the xc.h environment. 7.2 Device Header Files - Microchip Online docs
It dynamically routes your code to the correct device-specific header file (like ). xc.h library download
Go to > Options (Windows) or MPLAB X IDE > Preferences (macOS). Click on the Embedded tab and select Build Tools .
#include // Example configuration bit settings (Device-specific) #pragma config FOSC = INTOSC // Oscillator Selection bits #pragma config WDTE = OFF // Watchdog Timer Enable bit #define _XTAL_FREQ 8000000 // Define oscillator frequency (8 MHz) for delays void main(void) TRISBbits.TRISB0 = 0; // Set PORTB Pin 0 as an output while(1) LATBbits.LATB0 = 1; // Turn LED on __delay_ms(500); // Wait 500 milliseconds LATBbits.LATB0 = 0; // Turn LED off __delay_ms(500); // Wait 500 milliseconds Use code with caution. Troubleshooting Common xc.h Errors Error: "xc.h: No such file or directory" The xc
file is part of different compiler suites depending on your hardware: : For 8-bit PIC and AVR microcontrollers. : For 16-bit PIC and dsPIC devices. : For 32-bit PIC and SAM devices. Microchip Technology 2. Download and Installation Steps Visit the Official Site : Go to the MPLAB XC Compilers Select Your OS : Choose the installer for Windows, Linux, or macOS. Run the Installer : Follow the prompts. You can use the , which includes all necessary headers like but with fewer code optimizations. Add to Path
No. xc.h is proprietary to Microchip Technology. It is distributed freely as part of the XC compilers, but the source code is not public. Do not look for "xc.h source code download" – it will not be legitimate. Go to > Options (Windows) or MPLAB X
If the compilation succeeds, your xc.h library is correctly installed and functional.
TRISBbits.TRISB0 = 0; // Set RB0 as output LATBbits.LATB0 = 1; // Set RB0 High Use code with caution. Beyond xc.h : What's Included?