VsCode设置ESP32工具链+刨根问底点灯

https://cmake.org/

https://git-scm.com/downloads

https://docs.espressif.com/projects/esp-idf/zh_CN/latest/esp32/get-started/index.html

https://github.com/espressif/vscode-esp-idf-extension

ESP-IDF BLE ANCS示例
Apple Notification Center服务（ANCS）的目的是为Bluetooth配件（通过Bluetooth低能耗链接连接到iOS设备）提供一种简单方便的方法，以访问在iOS设备上生成的多种通知。

Apple Notification Center服务是一项主要服务，其服务UUID为7905F431-B5CE-4E99-A40F-4B1E122D00D0。

NP上只能出现一个ANCS实例。由于iOS的性质，不能保证始终存在ANCS。结果，NC应该寻找并订阅GATT服务的“服务已更改”特征，以便随时监视ANCS的潜在发布和取消发布。

ANCS的基本形式具有三个特征：
通知来源：UUID 9FBF120D-6301-42D9-8C58-25E699A21DBD（可通知）
控制点：UUID 69D1D8F3-45E1-49A8-9821-9BBDFDAAD9D9（可通过响应写入）
数据源：UUID 22EAC6E9-24D6-4BB5-BE44-B36ACE7C7BFB（可通知）
所有这些特征都需要访问授权。

https://www.cnblogs.com/gtsup/p/9559770.html

https://github.com/espressif/esptool/issues/226

https://github.com/espressif/arduino-esp32/blob/master/variants/doitESP32devkitV1/pins_arduino.h

#ifndef Pins_Arduino_h
#define Pins_Arduino_h

#include <stdint.h>

#define EXTERNAL_NUM_INTERRUPTS 16
#define NUM_DIGITAL_PINS        40
#define NUM_ANALOG_INPUTS       16

#define analogInputToDigitalPin(p)  (((p)<20)?(esp32_adc2gpio[(p)]):-1)
#define digitalPinToInterrupt(p)    (((p)<40)?(p):-1)
#define digitalPinHasPWM(p)         (p < 34)

static const uint8_t LED_BUILTIN = 2;
#define BUILTIN_LED  LED_BUILTIN // backward compatibility
#define LED_BUILTIN LED_BUILTIN

static const uint8_t TX = 1;
static const uint8_t RX = 3;

static const uint8_t SDA = 21;
static const uint8_t SCL = 22;

static const uint8_t SS    = 5;
static const uint8_t MOSI  = 23;
static const uint8_t MISO  = 19;
static const uint8_t SCK   = 18;

static const uint8_t A0 = 36;
static const uint8_t A3 = 39;
static const uint8_t A4 = 32;
static const uint8_t A5 = 33;
static const uint8_t A6 = 34;
static const uint8_t A7 = 35;
static const uint8_t A10 = 4;
static const uint8_t A11 = 0;
static const uint8_t A12 = 2;
static const uint8_t A13 = 15;
static const uint8_t A14 = 13;
static const uint8_t A15 = 12;
static const uint8_t A16 = 14;
static const uint8_t A17 = 27;
static const uint8_t A18 = 25;
static const uint8_t A19 = 26;

static const uint8_t T0 = 4;
static const uint8_t T1 = 0;
static const uint8_t T2 = 2;
static const uint8_t T3 = 15;
static const uint8_t T4 = 13;
static const uint8_t T5 = 12;
static const uint8_t T6 = 14;
static const uint8_t T7 = 27;
static const uint8_t T8 = 33;
static const uint8_t T9 = 32;

static const uint8_t DAC1 = 25;
static const uint8_t DAC2 = 26;

#endif /* Pins_Arduino_h */

https://github.com/espressif/arduino-esp32/releases/download/1.0.4/package_esp32_index.json

void setup() {
  pinMode(LED_BUILTIN, OUTPUT);
}// the loop function runs over and over again forever
void loop() {
  digitalWrite(LED_BUILTIN, HIGH);   // turn the LED on (HIGH is the voltage level)
  delay(1000);                       // wait for a second
  digitalWrite(LED_BUILTIN, LOW);    // turn the LED off by making the voltage LOW
  delay(1000);                       // wait for a second
}

Chip is ESP32D0WDQ6 (revision 1)
Features: WiFi, BT, Dual Core, 240MHz, VRef calibration in efuse, Coding Scheme None
MAC: 7c:9e:bd:f3:69:10
Auto-detected Flash size: 4MB
芯片是ESP32D0WDQ6（版本1）
功能：WiFi，BT，双核，240MHz，VRef标定，编码方案无
MAC：7c：9e：bd：f3：69：10
自动检测到的闪存大小：4MB

https://www.espressif.com/sites/default/files/documentation/esp32-wroom-32_datasheet_cn.pdf

https://docs.platformio.org/en/latest/boards/espressif32/esp32doit-devkit-v1.html

https://docs.espressif.com/projects/esp-idf/en/latest/esp32/api-reference/peripherals/gpio.html

/* Blink Example

   This example code is in the Public Domain (or CC0 licensed, at your option.)

   Unless required by applicable law or agreed to in writing, this
   software is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
   CONDITIONS OF ANY KIND, either express or implied.
*/
#include <stdio.h>
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "driver/gpio.h"
#include "sdkconfig.h"

/*可以使用项目配置菜单（idf.py menuconfig）选择要闪烁的GPIO，
    或者，您可以编辑以下行并在此处设置一个数字。
*/
#define BLINK_GPIO CONFIG_BLINK_GPIO//对这个要闪烁的引脚进行宏定义

void app_main(void)//main函数,么有参数,没有返回值
{
    /* 为焊盘BLINK_GPIO配置IOMUX寄存器（某些焊盘为
        重置时已复用到GPIO，但有些默认使用GPIO
        功能，需要切换到GPIO。咨询
        技术参考以获取打击垫及其默认设置的列表
        职能。）
    */
    gpio_pad_select_gpio(BLINK_GPIO);//
    /* 将GPIO设置为推/拉输出 */
    gpio_set_direction(BLINK_GPIO, GPIO_MODE_OUTPUT);//设置GPIO的工作模式
    while (1)／／接着是一个死循环
    {
        /* Blink off (output low) */
        printf("Turning off the LED\n");／／打印没有什么好说得，但是我这边不输出打印字符不知道为什么
        gpio_set_level(BLINK_GPIO, 0);
        vTaskDelay(1000 / portTICK_PERIOD_MS);／／延时时间

        /* Blink on (output high) */
        printf("Turning on the LED\n");
        gpio_set_level(BLINK_GPIO, 1);
        vTaskDelay(1000 / portTICK_PERIOD_MS);
    }
}