HELP. analogWrite() dont work?

Using Arduino Microcontrollers
1

Im try to generate PWM on PA6 in bluepill-stm32f401CCU6, but it dont work, output is LOW.
My code:

void setup() {
pinMode(PA6,OUTPUT);
}

void loop() {
analogWrite(PA6,128);
delay(1000);
}

My IDE is install 1.8.15 version. I dont know why.
Some one could help me. Thank you!

2

Have you seen this: How to change Arduino/STM32 PWM frequency to 20kHz in Arduino IDE
Might be useful.

Keep in mind that PWM outputs are very processor-specific; what's hiding behind a seemingly simple 'analogWrite' is an entirely different beast for an STM32Fxxx processor than it is for, let's say, the ATmega328p most of us are familiar with.

3

Yes. It work fine with STM32F103C8T6. I have verified. But now, i am test some simple function in arduino like: Blink LED, simple PWM, ADC, SERIAL.... All work fine. But PWM dont work. Is it some library needed?

4

Did you read the page I linked to? Was it useful in any way?

5

My prolem is solved after change reference ULR
old: http://dan.drown.org/stm32duino/package_STM32duino_index.json - stm32f401ccu6 analogWrite dont work
new: https://github.com/stm32duino/BoardManagerFiles/raw/master/STM32/package_stm_index.json - work fine.
Thank you so much for your answer!

6

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