/*
  Raspberry Pi Pico SDK PWM Example

  https://wokwi.com/projects/326847710095213139

  Generates two 250khZ PWM signal (1 MHz clock, 4 cycle period) on pins 0, 1

  Use the logic analyzer to view the signals: https://docs.wokwi.com/guides/logic-analyzer
*/

#include "pico/stdlib.h"
#include "hardware/pwm.h"

int main() {
  // Tell GPIO 0 and 1 they are allocated to the PWM
  gpio_set_function(0, GPIO_FUNC_PWM);
  gpio_set_function(2, GPIO_FUNC_PWM);

  // Find out which PWM slice is connected to GPIO 0 (it's slice 0)
  uint slice_num_0 = pwm_gpio_to_slice_num(0);

  //pwm_set_clkdiv(slice_num_0, 125); // pwm clock should now be running at 1MHz
  pwm_set_clkdiv(slice_num_0, 125);

  // Set period N+1
  pwm_set_wrap(slice_num_0, 1023);
  // Set channel A output high for M cycle before dropping
  pwm_set_chan_level(slice_num_0, PWM_CHAN_A, 128);

  // Find out which PWM slice is connected to GPIO 3 (it's slice 1)
  uint slice_num_1 = pwm_gpio_to_slice_num(3);

  pwm_set_clkdiv(slice_num_1, 125); // pwm clock should now be running at 1MHz

  // Set period N+1
  pwm_set_wrap(slice_num_1, 1023);
  // Set channel A output high for M cycle before dropping
  pwm_set_chan_level(slice_num_1, PWM_CHAN_A, 256);


  // Set the PWM running
  pwm_set_enabled(slice_num_0, true);
  pwm_set_enabled(slice_num_1, true);

  // Note we could also use pwm_set_gpio_level(gpio, x) which looks up the
  // correct slice and channel for a given GPIO.
  while (1) {
    sleep_ms(250);
    pwm_advance_count(slice_num_1); // НЕ РАБОТАЕТ. Наверно не реализовано в симуляторе.
  }
}