esp32_rmt_pcnt.ino

    
#include "driver/rmt.h"

static  rmt_item32_t items[3] = {
  {{ 5000, 1, 4000, 0 }},
  {{ 5000, 1, 4000, 0 }},
  {{ 5000, 1, 4000, 0 }}
};
//    { 4000, 1, 4000, 0 }, 

/*
 * Initialize the RMT Tx channel
 */
static void rmt_tx_init(void)
{
    rmt_config_t config;
    config.rmt_mode = RMT_MODE_TX;
    config.channel = RMT_CHANNEL_0;
    config.gpio_num = GPIO_NUM_21;
    config.mem_block_num = 1;
    config.tx_config.loop_en = false;
    config.clk_div = 80; 

    ESP_ERROR_CHECK(rmt_config(&config));
    ESP_ERROR_CHECK(rmt_driver_install(config.channel, 0, 0));
}

// void app_main(void *ignore)
void setup()
{

    Serial.begin(115200);
    rmt_tx_init();
    delay(100);
    //int i;
    //for (int i = 0 ; i < 1999 ; i++) {
    //  items[i] = (rmt_item32_t){{{ 5000, 1, 4000, 0 }}};
    //}

    ESP_ERROR_CHECK(rmt_write_items(RMT_CHANNEL_0, items, 3, false));
}

void loop()
{
    Serial.println(rmt_wait_tx_done(RMT_CHANNEL_0, 0));
    delay(100);

}