fast toggle

#include "freertos/FreeRTOS.h"
#include "esp_wifi.h"
#include "esp_system.h"
#include "esp_event.h"
#include "esp_event_loop.h"
#include "nvs_flash.h"
#include "driver/gpio.h"

esp_err_t event_handler(void *ctx, system_event_t *event) { return ESP_OK; }
void loop(void *pvParameter);
void toggle(void *pvParameter);

#define TogglePin GPIO_NUM_23


void app_main(void) {
    nvs_flash_init();
    tcpip_adapter_init();
    ESP_ERROR_CHECK( esp_event_loop_init(event_handler, NULL) );
    wifi_init_config_t cfg = WIFI_INIT_CONFIG_DEFAULT();
    ESP_ERROR_CHECK( esp_wifi_init(&cfg) );
    ESP_ERROR_CHECK( esp_wifi_set_storage(WIFI_STORAGE_RAM) );
    ESP_ERROR_CHECK( esp_wifi_set_mode(WIFI_MODE_STA) );
    wifi_config_t sta_config = {
        .sta = {
            .ssid = "access_point_name",
            .password = "password",
            .bssid_set = false
        }
    };
    ESP_ERROR_CHECK( esp_wifi_set_config(WIFI_IF_STA, &sta_config) );
    ESP_ERROR_CHECK( esp_wifi_start() );
    ESP_ERROR_CHECK( esp_wifi_connect() );

    gpio_pad_select_gpio(TogglePin);
    gpio_set_direction(TogglePin, GPIO_MODE_OUTPUT);
    xTaskCreatePinnedToCore(&toggle, "toggle", 4096, NULL, 1, NULL, 1);
    xTaskCreatePinnedToCore(&loop, "loop", 4096, NULL, 1, NULL, 0);
}


void loop(void *pvParameter) {
    printf("loop called\n");
    while (1) {
        vTaskDelay(500 / portTICK_PERIOD_MS);
    }
}


void toggle(void *pvParameter) {
    printf("toggle called.\n");
    portDISABLE_INTERRUPTS();

    while (1) {
        GPIO.out_w1ts |= (1 << TogglePin);
        __asm__ __volatile__("nop;nop;nop;nop;nop;nop;nop;"); // Bug workaround

        GPIO.out_w1tc |= (1 << TogglePin);
        __asm__ __volatile__("nop;nop;nop;nop;nop;nop;nop;");
    }

    // v  doesn't seems to make any difference (as expected)
    /*while (1) {
        GPIO.out |= (1 << TogglePin);
        __asm__ __volatile__("nop;nop;nop;nop;nop;nop;nop;");

        GPIO.out &= ~(1 << TogglePin);
        __asm__ __volatile__("nop;nop;nop;nop;nop;nop;nop;");
    }*/

    portENABLE_INTERRUPTS();
}