[SOLVED] PWM buttons control

Hi
I trying to control PWM duty by buttons, but I have no pulses on PA3 unless this line is disabled and contain of the loop.

Timer2.attachInterrupt(0, Tim2_ISR);

Don’t mix pwmtimer2 with Timer2, use only one of them.
As I said before, there is no need for pwmtimer2 instance.

In PWM context
Timer2.setCompare(TIMER_CH4, i);

Thanks edogaldo.
One button is working “PB5”, PB3 is not.

How is the buttons wiring?
Is it the same for both buttons?

Separate two buttons, I can see that voltage on pin is dropping to 0V when I pressed the button, but nothing happens with the width of the pulses

Are the buttons wired between the PIN and GND or between the PIN and VCC?
In the first case you have to change your code setting the pins mode to INPUT_PULLUP (default HIGH) and checking for the pins to go LOW..

between the PIN and VCC

I changed to PB6 and is working. Now I need to add serial begin 9600 and print ln “i”

Serial monitor is working, but the width is changing to fast, so is hard to set up designated number.
Can be reduced by 10x ?

Another question.
In the first code there are 2 channels, how to get a second channel (not regulated) in your version ?

Maybe “delay(100);” somewhere ?

volatile int i = 128; //initializing a integer for incrementing and decrementing duty ratio.

void setup() {
pinMode(PB6, INPUT_PULLDOWN);// sets the pin0 as output
pinMode(PB5, INPUT_PULLDOWN);// sets the pin1 as output
pinMode(PA3, PWM);
analogWrite(PA3, i);
Serial.begin(9600);
}
// Serial.begin(9600);
//Serial.println(i);
void loop()
{
if (digitalRead(PB6) == HIGH)
{
if (i < 255)
{
i++;//if pin PB3 is pressed and the duty ratio value is less than 255
analogWrite(PA3, i); // analogWrite values from 0 to 255
delay(30);
}
}
if (digitalRead(PB5) == HIGH)
{
if (i > 0)
{
i--;// if pin PB5 is pressed and the duty ratio value is greater than 0
analogWrite(PA3, i); // analogWrite values from 0 to 255
delay(30);
}
}
Serial.println(i);
}


What about printing only when you change i?!

Thanks for your input.
That will be ok, I Am more concern about second channel.

Thanks edogaldo
I did it, everything is working as I need, except the speed, I need to reduced it because by pressing the buttons is hard to regulate the width with accuracy of one pulse.

Maybe you should use an EXTI for button press using a RISING or FALLING trigger.

EXIT – is something new to me, google doesn’t say much about this, can you give me more info ?
I was thinking to use another timer with 10x lower frequency to control regulation. I need to control about +/_10% of the width

I did it, delay(300); instead delay(30);
Thanks guys for help.

Some improvements.
How to switch from delay 300 to 30 when button is pressed longer than 2 sec ?