ESP32 RMT pulse generation minimal example using Arduino & PlatformIO

The following example will generate 100us pulses every 10ms. The pulses are generated using the RMT peripheral.

#include <Arduino.h>
#include <esp_log.h>
#include <driver/rmt.h>

// Output pulse train on D14
constexpr gpio_num_t rmtPin = GPIO_NUM_14;
constexpr rmt_channel_t RMT_TX_CHANNEL = RMT_CHANNEL_0;


static const rmt_item32_t pulseRMT[] = {
    {{{
      /*pulse duration=*/100, /*pulse level*/1,
      // After pulse, output 0
      0, 0
    }}},
};


void setup() {
  Serial.begin(115200);

  rmt_config_t config = RMT_DEFAULT_CONFIG_TX(rmtPin, RMT_TX_CHANNEL);
  config.clk_div = 80; // input clock 80 MHz => output clk 1 MHz

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

}

void loop() {
  ESP_ERROR_CHECK(rmt_write_items(RMT_TX_CHANNEL, pulseRMT, sizeof(pulseRMT) / sizeof(rmt_item32_t), true));
  delay(10);
}

[env:esp32dev]
platform = espressif32
board = esp32dev
framework = arduino
monitor_speed = 115200