Max number of PWM pins on STM32C011F6?

[KK-Fong]

How many PWM pins are available on STM32C011F6? I tried the following test code driving 8 LEDs. It did not perform as I thought. PA7_ALT1 and PA0 did not turn on but PC14 and PA8 showed up instead. I used the second pwmPin[] with a different order. It gave a different result. Thanks in advance for giving me suggestions.

/* Test Code for STM32C011F6 */

#include <Wire.h>


#define DELAY   500

const int pwmPins[] = {PA8, PC14, PA2, PA7_ALT1, PA6, PA1, PA0, PC15};
//const int pwmPins[] = {PA0, PA1, PA2, PA6, PA7_ALT1, PA8, PC14, PC15};
const int numPins = 8;


void setup() {
  // 1. Configure UART1 
  Serial1.setTx(PA11);
  Serial1.setRx(PA12);
  Serial1.begin(115200);

  // 2. Configure I2C1 on Port B
  Wire.setSCL(PB6);
  Wire.setSDA(PB7);
  Wire.begin();

  for (int i = 0; i < numPins; i++) {
    pinMode(pwmPins[i], OUTPUT);
  }
}

void loop() {

  for (int i = 0; i < numPins; i++) {
    analogWrite(pwmPins[i], 255); 
    delay(DELAY);
    analogWrite(pwmPins[i], 0);   
    delay(DELAY);
  }

}

[fpistm]

Hi @KK-Fong
Looking at first table:
{PA8, PC14, PA2, PA7_ALT1, PA6, PA1, PA0, PC15};
Result using this config:

  {PA_8,       TIM1,  STM_PIN_DATA_EXT(STM_MODE_AF_PP, LL_GPIO_PULL_UP, GPIO_AF2_TIM1, 1, 0)}, // TIM1_CH1
  {PC_14,      TIM3,  STM_PIN_DATA_EXT(STM_MODE_AF_PP, LL_GPIO_PULL_UP, GPIO_AF11_TIM3, 2, 0)}, // TIM3_CH2
  {PA_2,       TIM1,  STM_PIN_DATA_EXT(STM_MODE_AF_PP, LL_GPIO_PULL_UP, GPIO_AF5_TIM1, 3, 0)}, // TIM1_CH3
  {PA_7_ALT1,  TIM3,  STM_PIN_DATA_EXT(STM_MODE_AF_PP, LL_GPIO_PULL_UP, GPIO_AF1_TIM3, 2, 0)}, // TIM3_CH2
  {PA_6,       TIM3,  STM_PIN_DATA_EXT(STM_MODE_AF_PP, LL_GPIO_PULL_UP, GPIO_AF1_TIM3, 1, 0)}, // TIM3_CH1
  {PA_1,       TIM1,  STM_PIN_DATA_EXT(STM_MODE_AF_PP, LL_GPIO_PULL_UP, GPIO_AF5_TIM1, 2, 0)}, // TIM1_CH2
  {PA_0,       TIM1,  STM_PIN_DATA_EXT(STM_MODE_AF_PP, LL_GPIO_PULL_UP, GPIO_AF5_TIM1, 1, 0)}, // TIM1_CH1
  {PC_15,      TIM3,  STM_PIN_DATA_EXT(STM_MODE_AF_PP, LL_GPIO_PULL_UP, GPIO_AF3_TIM3, 3, 0)}, // TIM3_CH3

So PA8 and PA1 uses the same Timer and channel: TIM1_CH1, same for PC14 and PA_7_ALT1 (TIM3_CH2).