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AnalogWrite dont work in arduino

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1AnalogWrite dont work in arduino Empty AnalogWrite dont work in arduino Tue Apr 27, 2021 7:03 pm

vtarias



Hello greetings.
The analogWrite function does not work on any PWM pin for the arduino mega and arduino uno. Setting the microcontroller registers to generate a pwm signal does not work either.
In simulIDE 4.13 I have managed to generate a signal from pwm, manipulating the registers of the timers, but with analogWrite I have not been able to.
Thank you in advance for your help.

code for analogWrite

void setup() {
// put your setup code here, to run once:
pinMode(13,OUTPUT);
analogWrite(13,150);
}

void loop() {
// put your main code here, to run repeatedly:

}

code manipulating registers


const int Pin = 8;

void setup() {
pinMode(Pin, OUTPUT);
//se desea una resoluciĆ³n de 9 bits con una frecuencia de 3900 HZ:
TCCR4A=TCCR4B=0;
TCCR4A |= (1 << WGM41);
TCCR4B |= (1 << WGM42 | 1 << CS41);
TCCR4A |= (1 << COM4C1); //configura pin para salida pwm
OCR4C = 333; //va de 0 a 511

}

void loop() {
for (int brightness = 0; brightness < 511; brightness++) {
OCR4C = brightness;
delay(10);
}
// fade the LED on thisPin from brightest to off:
for (int brightness = 511; brightness >= 0; brightness--) {
OCR4C = brightness;
delay(10);
}
delay(100);
}


2AnalogWrite dont work in arduino Empty Re: AnalogWrite dont work in arduino Wed Apr 28, 2021 10:50 am

arcachofo

arcachofo

Hi.

I did some test and there are indeed some PWM channels not worling:

Arduino Uno, all working.

Arduino Mega, not working:
2, 4, 7,8, 12, 13.

I will have a look to those not working.

3AnalogWrite dont work in arduino Empty Re: AnalogWrite dont work in arduino Wed Apr 28, 2021 12:17 pm

arcachofo

arcachofo

Fortunately this error can be solved easily:

Attached is mega.package file (unzip it).
Replace the original file at:
SimulIDE_0.4.15-SR1_XX/share/simulide/data/arduino/old/

Start simulide and test if it is working for you.
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4AnalogWrite dont work in arduino Empty Re: AnalogWrite dont work in arduino Thu Apr 29, 2021 1:01 am

vtarias



gracias, voy a utilizar lo que me has aconsejado.

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