ESP32 rmt_tx sync manager minimal example

See ESP32 rmt_tx simple pulse example (ESP-IDF) for an example without sync manager

#include <driver/rmt_tx.h>

rmt_channel_handle_t channel;
rmt_tx_channel_config_t tx_chan_config = {
    .gpio_num = GPIO_NUM_19,          // GPIO number
    .clk_src = RMT_CLK_SRC_DEFAULT,   // select source clock
    .resolution_hz = 1 * 1000 * 1000, // 1 MHz resolution
    .mem_block_symbols = 64,          // memory block size, 64 * 4 = 256 Bytes
    .trans_queue_depth = 1,           // set the number of transactions that can pend in the background
};
ESP_ERROR_CHECK(rmt_new_tx_channel(&tx_chan_config, &channel));
ESP_ERROR_CHECK(rmt_enable(channel));

rmt_symbol_word_t txdata[64];
txdata[0] = {
    .duration0 = 100,
    .level0 = 1,
    .duration1 = 0,
    .level1 = 0,
};

// install sync manager
rmt_channel_handle_t tx_channels[] = {channel};
rmt_sync_manager_handle_t synchro = NULL;
rmt_sync_manager_config_t synchro_config = {
    .tx_channel_array = tx_channels,
    .array_size = sizeof(tx_channels) / sizeof(rmt_channel_handle_t),
};
ESP_ERROR_CHECK(rmt_new_sync_manager(&synchro_config, &synchro));

// Create simple encoder
rmt_copy_encoder_config_t encoder_config;
rmt_encoder_handle_t encoder;
ESP_ERROR_CHECK(rmt_new_copy_encoder(&encoder_config, &encoder));

rmt_transmit_config_t tx_config = {
    .loop_count = 0, // no transfer loop
};

while(true)
{
    ESP_ERROR_CHECK(rmt_transmit(channel, encoder, pulseRMT, 1*sizeof(rmt_symbol_word_t), &tx_config));
    // Wait for one second
    vTaskDelay(10 / portTICK_PERIOD_MS);
}