- Mplab xc8 configuration bits install#
- Mplab xc8 configuration bits update#
- Mplab xc8 configuration bits full#
- Mplab xc8 configuration bits pro#
The prescaler processes the clock before inputting to the PLL. PLL is used for generating a clock for USB. #pragma config USBDIV = 2 // Clock source from 96MHz PLL/2 96MHz PLL prescaler #pragma config USBDIV = 1 // Clock source from OSC1/OSC2 Otherwise, we need to use PLL and postscaler to process the clock. If the clock is 6 MHz or 48 MHz, it can be used directly. USB accepts only 48MHz (full speed) and 6MHz (low speed) frequency clocks. This will select Full-Speed USB Clock Source, there are two choices. #pragma config IESO = OFF // Switch over Disabled, Put IESO = ON to enable USB clock selection Using this configuration bit, we can enable clock switcher between internal and external clocks. #pragma config FCMEM = ON // Failsafe enabled Internal/External switch over #pragma config FCMEM = OFF // Failsafe Disabled This option can be enabled by setting the FCMEM configuration bit. The fail-safe monitor allows the device to switch over to internal oscillators when external clock fails. Oscillator configuration bits – PIC18F4550 Fail-safe clock monitor Other 12 registers are used for setting configuration bits for PIC18F4550. The last two are device ID registers which are read-only. PIC18F4550 has 14 configuration registers, CONFIG1L, CONFIG1H, CONFIG2L, CONFIG2H, CONFIG3H, CONFIG4L, CONFIG5L, CONFIG5H, CONFIG6L, CONFIG6H, CONFIG7L, CONFIG7H, DEVID1, and DEVID2. Registers used for the setup of Configuration bits in PIC18F4550 The generated configuration bits can be used in the application by directly copying and pasting or saving it as a separate file and including it in the project. MPLAB X IDE has a configuration bits window to generate the directives based on the selected options. So it can only be accessed using table reads and table writes.Ĭonfiguration bits are directives written in the software. These bits are mapped starting at program memory location 300000h.Ĭonfiguration bits are not accessible to the user through code because it belongs to the configuration memory space, not the user program memory space. They can be programmed to select various device configurations. They can only be modified during programming time. Using these bits, we can essentially control where is the clock source, do the application needs watchdog timer etc. These are read during startup/reset and enable or disable different hardware features based on the values of bits.
We will start a new project from scratch.Configuration bits are special bits used for controlling different features in the Microcontroller. When the application is ready, click File>New Project.
Mplab xc8 configuration bits update#
If you think you will want to use XC8 from the command line, make sure to check the option to update your system's PATH variable.
Mplab xc8 configuration bits pro#
You can try the Pro version for a limited time, but I don't recommend it for one reason: When your trial expires, you may find you can no longer fit some of your projects within the memory of your device because your binaries are not being optimized anymore!
Mplab xc8 configuration bits install#
Once again, default options are OK.īe sure to install the Free version. Click "Downloads" in the left hand menu and select the version of XC8 for your computer.
It is OK to use default installation options. Navigate to the Downloads tab on that page and select the appropriate version for your computer. The newest version of MPLAB X can be found here. If you are using OSX or Linux there may be slight differences to the exact procedure. This guide will cover downloading, installing, and using MPLAB X and the XC8 Compiler for 8-bit PIC microcontrollers. These feature more optimizations to reduce code size and are not necessary for our purposes. We will be using the free Lite edition, which is a stripped down version of the Standard and Pro editions. XC8 is a C compiler for 8-bit PIC devices.
Mplab xc8 configuration bits full#
MPLAB X is built off the NetBeans project and is full featured. Now Windows, OSX, and Linux users can all program PICs with official software. It is the Successor to MPLAB v8 which was compatible with Windows only. MPLAB X is the IDE (Integrated Development Environment) for Microchip PIC microcontrollers.