PWM program from mikroC PRO for PIC Help

[Radu86]

Well, we do not know what's the code in mE's library. I believe it set's the OSC so you don't have to. But I am not sure.
PWM1_init initializez the first module. I don't know how many modules does your pic have. You should check the datasheet for that.

[Ideacharge]

Maybe could be a bad PIC configuration settings?

[masab_ahad]

did the program work in proteus? i have also checked some simple examples in proteus but they aren't working too....

[00100]

Hey;
Why does'nt this program work ?
Why nobody answer us ?

[aparna k]

Hi
I am using PIC18F67K40. In this, I am implementing PMW. But it is not working. Can you suggest me what is the issue?

[stefan.filipovic]

Hi,

Please find the simple example for PWM with PIC18F67K40 in the attachment.

Kind regards,

[aparna k]

Thanks for your reply.
Already I got the functionality of PWM. But I want to decrease PWM frequency. The least possible frequency is 489Hz. If I give less than this frequency, it is giving an error. Can I decrease that frequency? If it is possible, then how to decrease? Please suggest to me.

[stefan.filipovic]

Hi,

The PWM frequency is derived from the system clock frequency, so I guess you are using 64 MHz Fosc, with this Fosc you can't get PWM frequency lower than 489Hz. Decreasing the Fosc frequency you will be able to decrease the PWM frequency.

Kind regards,

[mmm]

Hello,
I am using PIC18F67K40 MCU, I need to generate the PWM signal but my problem is I new to PPS config settings so I found one example code and generate the pwm signal but every 2 sec it will generate the PWM signal its width is changing very lately so please help me to get the perfect pwm signal as our requirement.

Code:
unsigned int duty1 = 0;

void InitMain() {
OSCCON1 = 0X60; //HFINTOSC & 1:1 Divider
OSCCON3 = 0x00; // inorder to decrease the clock rate i used OSCCON2
OSCTUNE = 0x00; //mAximum Frequency
OSCFRQ = 0X08; //64 Mhz
TRISC.B4 = 0; // designate PORTC pins as output
PORTC.B4 = 0; // set PORTC to 0


Unlock_IOLOCK();
PPS_Mapping_NoLock(_RC4, _OUTPUT, _CCP1);
Lock_IOLOCK();

PWM1_Remappable_Init(5000); // Initialize PWM1 module at 5KHz

}

void main() {
InitMain();
PWM1_Remappable_Start(); // start PWM1
while(1){

for(duty1 = 0; duty1 < 90; duty1++){
PWM1_Remappable_Set_Duty(duty1);
Delay_us(1);
}
for(duty1 = 60; duty1 > 0; duty1--){
PWM1_Remappable_Set_Duty(duty1);
Delay_us(1);
}
}
}

please guide me, thanks in advance,

best regards
mmm