ESP32 | WIndows ESP-IDF 编程（二）

点灯程序

• 创建好 hello_world 模板后，在根目录下创建 comm 文件夹，用于放组件
• comm 中创建一个 CMakeLists.txt，创建一个 led 文件夹

• led 文件夹中创建 led.c 和 led.h

  目录结构如下：

  ├─comm
  │  │  CMakeLists.txt
  │  │
  │  └─led
  │          led.c
  │          led.h

  comm/CmakeLists.txt:

  set(src_dirs LED)
  set(include_dirs LED)
  set(requires driver)
  
  idf_component_register(
    SRC_DIRS ${src_dirs}
    INCLUDE_DIRS ${include_dirs}
    REQUIRES ${requires}
  )
  
  component_compile_options(-ffast-math -o3 -Wno-error=format=-Wno-format)

  comm/led/led.c

  #include "led.h"
  #include "driver/gpio.h"
  /* 可配置的宏 */
  #ifndef LED_GPIO
  #define LED_GPIO     2          // GPIO2
  #endif
  #ifndef LED_LEVEL_ON
  #define LED_LEVEL_ON 0         // 0=低电平点亮
  #endif
  void led_init(void)
  {
  gpio_config_t io_conf = {
  .pin_bit_mask = (1ULL << LED_GPIO),
  .mode         = GPIO_MODE_OUTPUT,
  };
  gpio_config(&io_conf);
  gpio_set_level(LED_GPIO, !LED_LEVEL_ON);   // 初始熄灭
  }
  void led_set(bool on)
  {
  gpio_set_level(LED_GPIO, on ? LED_LEVEL_ON : !LED_LEVEL_ON);
  }
  void led_toggle(void)
  {
  static bool s_state = false;
  s_state = !s_state;
  led_set(s_state);
  }

  comm/led/led.h

  #ifndef LED_H
  #define LED_H
  #include <stdbool.h>
  /**
  @brief 初始化 LED 引脚
  */
  void led_init(void);
  /**
  @brief 控制 LED 开关
  @param on true 点亮，false 熄灭
  */
  void led_set(bool on);
  /**
  @brief 翻转 LED 状态
  */
  void led_toggle(void);
  #endif /* LED_H */

  增加 main.c 文件

  main/maim.c:

  #include "freertos/FreeRTOS.h"
  #include "freertos/task.h"
  #include "led.h"
  void app_main(void)
  {
    led_init();
    while (true) {
        led_toggle();
        vTaskDelay(pdMS_TO_TICKS(500));
    }
  }

  main文件夹 CMakeLists.txt 更改启动文件，增加 comm 依赖

  main 文件夹中的 CMakeLists.txt 添加 REQUIRES comm
  main/CMakeLists.txt：

  idf_component_register(
    SRCS "main.c"
    PRIV_REQUIRES spi_flash
    INCLUDE_DIRS ""
    REQUIRES comm
  )

  根目录 CMakeLists.txt 增加 comm 依赖

  增加 set(EXTRA_COMPONENT_DIRS comm)语句

  # The following lines of boilerplate have to be in your project's
  # CMakeLists in this exact order for cmake to work correctly
  cmake_minimum_required(VERSION 3.16)
  
  include($ENV{IDF_PATH}/tools/cmake/project.cmake)
  set(EXTRA_COMPONENT_DIRS comm)
  # "Trim" the build. Include the minimal set of components, main, and anything it depends on.
  idf_build_set_property(MINIMAL_BUILD ON)
  project(Demo1)

编译运行。done!