- MPLAB XC8 HOW TO CHANGE TIMER FREQUENCY CODE SOFTWARE
- MPLAB XC8 HOW TO CHANGE TIMER FREQUENCY CODE CODE
MPLAB XC8 HOW TO CHANGE TIMER FREQUENCY CODE CODE
Having it at zero like in the original code made no sense (and it indeed didn't work at all, the LED stayed OFF all the time). I also changed the ledTargetBrightness from 0 to 20. With respect to the original version in the link provided, in addition to the PIC setup, I changed my prescaler to have a ratio of 1:8, thinking it gives me 250 timer ticks to time 1000 microseconds with the internal oscillator of 4Mhz. In addition, I can see a high frequency oscillation of the brightness by eye while it slowly fades (fading occurs over about 0.5 second).
![mplab xc8 how to change timer frequency code mplab xc8 how to change timer frequency code](https://www.siriusmicro.com/mplabx-c/mplabx-projectproperties.png)
This code only makes the LED fade completely only once, after which it stays completely dimmed (or OFF) contrary to what I was aiming at: having the LED repeatedly fade off. Use project enums instead of #define for ON and OFF. #pragma config statements should precede project file includes. #pragma config CP = OFF // Flash Program Memory Code Protection bit (Code protection off) #pragma config CPD = OFF // Data EE Memory Code Protection bit (Data memory code protection off) #pragma config LVP = OFF // Low-Voltage Programming Enable bit (RB4/PGM pin has digital I/O function, HV on MCLR must be used for programming) #pragma config BOREN = OFF // Brown-out Detect Enable bit (BOD disabled) #pragma config MCLRE = OFF // RA5/MCLR/VPP Pin Function Select bit (RA5/MCLR/VPP pin function is digital input, MCLR internally tied to VDD) #pragma config PWRTE = OFF // Power-up Timer Enable bit (PWRT disabled) #pragma config WDTE = OFF // Watchdog Timer Enable bit (WDT disabled) Here's my version: #pragma config FOSC = INTOSCIO // Oscillator Selection bits (INTOSC oscillator: I/O function on RA6/OSC2/CLKOUT pin, I/O function on RA7/OSC1/CLKIN)
MPLAB XC8 HOW TO CHANGE TIMER FREQUENCY CODE SOFTWARE
I have trouble implementing this software pwm on a PIC16F628A based on instructions for other pics of the PIC18F family at this page: software PWM for PIC18F family and whose original implementation did not make complete sense either.
![mplab xc8 how to change timer frequency code mplab xc8 how to change timer frequency code](https://circuitdigest.com/sites/default/files/inlineimages/setting-configuration-bits-in-MPLAB-x-for-PIC-1.gif)
My current knowledge of PICs is currently limited to simple LED blinking with and without the use of interrupts and timers in C code with XC8, MPLAB IDE, and Pickit 3.