Reuse LEDC timer/channel [solved]

[floitsch_toit]

I'm trying to reuse an LEDC timer/channel on a different pin, but when I do so, the "old" pin is still connected to the channel. How do I make a channel only work on a new pin?

In the example below, I use the LEDC_TIMER_0 and LEDC_CHANNEL_0. I first configure it to be on pin 32.
I let the run_pwm function run, and then turn it off. So far everything works as expected.
However, when I now call the function with a different pin (33), then the old pin (32) also lights up. How can I disconnect pin 32 from LEDC_TIMER_0/LEDC_CHANNEL_0 ?

Code: Select all

#include <stdio.h>
#include <driver/ledc.h>
#include <freertos/FreeRTOS.h>
#include <freertos/task.h>

void run_pwm(int gpio_num) {
  ledc_timer_t timer = LEDC_TIMER_0;
  ledc_timer_config_t timer_conf = {
    .speed_mode = LEDC_HIGH_SPEED_MODE,
    .duty_resolution = LEDC_TIMER_13_BIT,
    .freq_hz = 5000,
    .timer_num = timer,
    .clk_cfg = LEDC_AUTO_CLK,
  };
  ledc_timer_config(&timer_conf);

  ledc_channel_t channel = LEDC_CHANNEL_0;
  ledc_channel_config_t channel_conf = {
    .gpio_num = gpio_num,
    .speed_mode = LEDC_HIGH_SPEED_MODE,
    .channel = channel,
    .intr_type = LEDC_INTR_DISABLE,
    .timer_sel = timer,
    .duty = 0,
    .hpoint = 0,
  };
  ledc_channel_config(&channel_conf);

  ledc_set_duty(LEDC_HIGH_SPEED_MODE, channel, 4095);
  ledc_update_duty(LEDC_HIGH_SPEED_MODE, channel);

  vTaskDelay(1000 / portTICK_PERIOD_MS);

  ledc_stop(LEDC_HIGH_SPEED_MODE, channel, 0);
  ledc_timer_rst(LEDC_HIGH_SPEED_MODE, timer);
}

void app_main(void)
{
  run_pwm(32);
  vTaskDelay(1000 / portTICK_PERIOD_MS);
  run_pwm(33);
}

[ESP_Sprite]

Either reconfigure it as a plain old GPIO or call gpio_reset() on it.

[floitsch_toit]

Thanks!