MPLAB XC8 PWM UPDATE
MPLAB XC8 PWM SOFTWARE
MPLAB XC8 PWM CODE

One where we set the value and another is a read only register that takes the copy of the value in the input register and update it in a glitch free manner. One input is from a timer and another from OC register where we set the value. One more thing, I don't want to switch the U2 at 17kHz, I just want to use the pin CCP1 to produce a PWM signal with 17kHz frequency (the switch is just to choose which LED I will export the PWM to).OC is simply a comparator.

MPLAB XC8 PWM CODE

But can you check if the code I write is a correct one to produce the PWM signal? Or is there anything in my program that may cause the problem? As I mentioned, there is nothing to force them to switch off quickly when you remove drive from the gate, so no way will they switch at 17kHz. When your designer returns, you need to review the MOSFET switching design. Personally, I would remove the U2 chip, and see if the PIC can be programmed and tested first, without that chip there. This may not be your immediate problem, but it's something that can't be ruled out. In your case, the PGC pin is selected to the control input on your multiplexer, so the multiplexer will be switching rapidly when the chip is being programmed, which could cause all sorts of other unexpected effects. It is a very bad practice to share the programming pins with any other function, and you must be very careful if it's unavoidable. Thus, I'm not able to redesign the PCB again, is it possible to still make it work without redesigning for the moment? thanhvu94 Posts: 5 Joined: Tue 9:24 amДЄnd why PGC pin switching rapidly might make the chip dead when it shares the pin with U2 switch?

I'm not the one who designs this PCB, it is a technician in the lab who did, and unfortunately he was on holiday until next week. I'm quite new to the programming of PIC, what exactly do you mean by LIFTING pin 6? And why PGC pin switching rapidly might make the chip dead when it shares the pin with U2 switch? By the way, is there any pin configuration in my program that could damage the chip? If you're able to redesign, you could change your pushbutton to pull down rather than up, and connect it to GP3 with MCLR disabled, so you could move the U2-IN control from GP1 to GP5 to free up PGC. The gate of the not selected MOSFET is floating, and you have no pulldown resistor to force it off.ДЄ demux, like a 74HC139 would have worked better. I also think the area around U2 and the MOSFETs is badly designed. Ric wrote:You're sharing the PGC pin with the U2 switch input, so this chip will be switching rapidly when you are programming the chip, which could cause problems.Д¬an you lift pin 6 of that chip and see if the problem persists? The PCB is attached into the Crazyflie and get the voltage supply from the Crazyflie quadcopter (3-4V). Here are the images for the PCB, schematics of the PCB and my hardware connection (The image is large so I cannot upload directly here). Did I do something wrong in my program that kills the chip?

MPLAB XC8 PWM SOFTWARE

Thus, I suppose my error doesn't come from the problem of the PIC or the ICD 3, but maybe the software program itself. After that, I tried again with empty program, it is no longer possible to load the program inside. Then, I tried again with my program, the same error happens. First, I load the empty program, it could load the program inside. When this program fails, I replace my current PIC with a new one. Program memory: start address = 0x0, end address = 0x3ffДЄddress: 0 Expected Value: 2bfe Received Value: 280e However, when I tried to load the code into my PIC, there is an error like this:Д¬ode: Select all The following memory area(s) will be programmed: While(PIR1.TMR2IF = 0) //wait until TM2IF is high

PIR1 &= ~(0x01 << 1) //clear Timer2 Flag on TMR2IF PR2 = 58 //Frequency = 17 kHz (with clock 4MHz)Д¬CP1CON = 0x0C //PWM enable, P1A output active-high TRISIO = 0b00100000 //All GPIO pins to output #pragma config BOREN = OFF // Brown-out Reset Selection bits (BOR disabled)ДЄNSEL = 0x00 // All IO pins are configured as digital #pragma config IOSCFS = 4MHZ // Internal Oscillator Frequency Select (4 MHz) #pragma config CP = OFF // Code Protection bit (Program memory code protection is disabled) #pragma config MCLRE = ON // MCLR Pin Function Select bit (MCLR pin function is MCLR) #pragma config PWRTE = OFF // Power-up Timer Enable bit (PWRT disabled) #pragma config WDTE = OFF // Watchdog Timer Enable bit (WDT disabled and can be enabled by SWDTEN bit of the WDTCON register) #pragma config FOSC = INTOSCIO // Oscillator Selection bits (INTOSCIO oscillator: I/O function on GP4/OSC2/CLKOUT pin, I/O function on GP5/OSC1/CLKIN) I'm working with a self-made PCB made by an electronic technician in my lab (have a PIC12F615 SMD type on it), and I need to generate PWM signal of 17kHz and 50% duty cycle to the CCP1 pin using ICD 3 Debugger with MPLAB XC8.

Mplab xc8 pwm