Hi android I write code PWM for PIC16F887 (My PIC16F886 a die, I change PIC16F887). I using PWM frequency 20Khz. Crystal 16Mhz. I create 50Hz. But, Module PWM not run. Can you help me? Sorry, my english is not good My code unsigned long int counter; void Interrupt(){ counter++; if (TMR2IF_bit == 1){...

Hi android

#define SET_IF_CARRY(port,bit).

I changed command line : SET_IF_CARRY(LATC,1) by SET_IF_CARRY(LATC,2). But It not run, I don't understand. Why not?

hocavr

Hi android

Why is CCP2?. if, Can you signal output CCP1 (RC2)? How do it?
Please help me

Regards
hocavr

I want booting PWM1 and PWM2 module. But, not using PWMx_init ()? Help me?
thanks

Hi I wrote the program for the PIC16F886, using quartz 8M. Create frequency 50Hz (or 60Hz) with PWM 20KHz. My program has problems. Please help me. Thanhks hocavr Email : hocavr@yahoo.com unsigned char sin_table[64]={0, 25, 49, 73, 96, 118, 139, 159, 177, 193, 208, 220, 231, 239, 245, 249, 250, 249,...

Thanks MARIO

I'm reading your code changes. Hopefully I will understand.
You can give me your email?.
Email : hocavr@yahoo.com

@MARIO

I put the external oscillator 20Mhz. and used Timer0. The machine cycle will = 0.05us. Have I to determine how the number of times the overflow flag? Can you help me?

Thanks

Dear MARIO

I revised circuit, using Timer0. I have simulate on Protues, it runs fine, But it only measured to 255Hz. Can you help me to measure up to 1MHz or 2MHz ?. I think, it is possible to use the overflow flag.

I send you file on protues and my code.

Thanks MARIO

I will follow your advice.I think it will have to use the hardware.

original code (100ms) run OK, I am tried test. This is schematic for Protues

Dir MARIO I followed the instructions in one example : 1. Initialize Timer1 registers with appropriate values for creating 100 ms delay. 2. Enable Timer0 as counter with prescaler 1:64. 3. Count the pulses for 100 ms. 4. Frequency = 10 x No. of Pulses 5. If frequency < 99990, change prescaler to 1:1...

Thank MARIO I did like you, but not. This is the code in the example, I have to fix how? //PIC16F886 20MHz // Define LCD module connections. sbit LCD_RS at RB2_bit; sbit LCD_EN at RB3_bit; sbit LCD_D4 at RB4_bit; sbit LCD_D5 at RB5_bit; sbit LCD_D6 at RB6_bit; sbit LCD_D7 at RB7_bit; sbit LCD_RS_Dir...

I use PIC 16F886 frequency count (1Mhz) and Crystal = 20Mhz. I want to have a resolution of 1Hz then must set Timer1 in 10ms. But How much value of TMR1L and TMR1H?. I see an example : long count_pulse(){ long ff = 0; Gate_Enable = 0; CountDone = 0; Num = 0; TMR1L = 0xDC; //TMR1 start time = 3036 fo...

Thank Sparky1039

I trying.

I want use PIC16F887 to measure the three frequency (same time all), frequency used for comparison purposes. How write code?.

Help me

Many thanks