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[文章]【HarmonyOS HiSpark Wi-Fi IoT 套件试用连连载】三、红绿黄灯板的使用

李元江
2020-11-15 22:03:56
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HarmonyOS鸿蒙OS鸿蒙系统
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wifiiot套件的板子很多，今天先来写一篇关于使用红绿灯板的帖子。主要完成红绿灯板，LED、蜂鸣器、按键的控制。
# 一、硬件介绍
通过查看红绿灯板的原理图，红绿灯板主要有红、绿、黄LED灯各一个，蜂鸣器一个，按键一个。
板子资源.jpg

经过查看原理图，它们使用主控的GPIO口分别为：
red         --》 GPIO10
green     --》 GPIO11
yellow    --》 GPIO12
beep       --》GPIO9

switch     --》GPIO8

# 二、新建文件
之前一直做的都是MCU这方面的开发，习惯了使用IDE,对一些编译工具链都没什么了解。对于怎么在原来的工程目录下，新建文件不是很熟悉。但是这些都不是什么大问题，可以看原来的工程目录结构是怎么样的，按照它的模板进行新建就行了。
好像就是一个文件夹下存放.c .h文件和BUILD.gn。
app目录.JPG

好的，我们就那样来开干。在app目录下新建SSL文件夹，下面再新建c文件和BUILD.gn文件。
SSL.JPG

## 1、light.c
该C文件任务主要是控制红绿黄灯亮灭。把原来的led例程复制过来进行更改。
新建一个任务，红绿灯一秒亮，一秒灭循环闪烁。
  1. /*
  2. * Copyright (c) 2020 Huawei Device Co., Ltd.
  3. * Licensed under the Apache License, Version 2.0 (the "License");
  4. * you may not use this file except in compliance with the License.
  5. * You may obtain a copy of the License at
  6. *
  7. *     http://www.apache.org/licenses/LICENSE-2.0
  8. *
  9. * Unless required by applicable law or agreed to in writing, software
  10. * distributed under the License is distributed on an "AS IS" BASIS,
  11. * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  12. * See the License for the specific language governing permissions and
  13. * limitations under the License.
  14. */

  16. #include <stdio.h>

  18. #include <unistd.h>

  20. #include "ohos_init.h"
  21. #include "cmsis_os2.h"
  22. #include "wifiiot_gpio.h"
  23. #include "wifiiot_gpio_ex.h"

  25. #define LIGHT_INTERVAL_TIME_US 1000000
  26. #define LIGHT_TASK_STACK_SIZE 512
  27. #define LIGHT_TASK_PRIO 26

  29. #define YELLOW_GPIO  WIFI_IOT_IO_NAME_GPIO_12
  30. #define GREEN_GPIO   WIFI_IOT_IO_NAME_GPIO_11
  31. #define RED_GPIO     WIFI_IOT_IO_NAME_GPIO_10



  35. static void *LightTask(const char *arg)
  36. {
  37.     (void)arg;
  38.     while (1) {
  39.                 GpioSetOutputVal(YELLOW_GPIO, 1);
  40.                 GpioSetOutputVal(RED_GPIO,1);
  41.                 GpioSetOutputVal(GREEN_GPIO,1);
  42.                 usleep(LIGHT_INTERVAL_TIME_US);
  43.                 GpioSetOutputVal(YELLOW_GPIO, 0);
  44.                 GpioSetOutputVal(RED_GPIO,0);
  45.                 GpioSetOutputVal(GREEN_GPIO,0);
  46.                 usleep(LIGHT_INTERVAL_TIME_US);
  47.         }

  49.     return NULL;
  50. }

  52. static void LightTaskEntry(void)
  53. {
  54.     osThreadAttr_t attr;

  56.     GpioInit();
  57.     IoSetFunc(WIFI_IOT_IO_NAME_GPIO_10, WIFI_IOT_IO_FUNC_GPIO_10_GPIO);
  58.     GpioSetDir(WIFI_IOT_IO_NAME_GPIO_10, WIFI_IOT_GPIO_DIR_OUT);
  59.    
  60.     IoSetFunc(WIFI_IOT_IO_NAME_GPIO_11, WIFI_IOT_IO_FUNC_GPIO_11_GPIO);
  61.     GpioSetDir(WIFI_IOT_IO_NAME_GPIO_11, WIFI_IOT_GPIO_DIR_OUT);
  62.    
  63.     IoSetFunc(WIFI_IOT_IO_NAME_GPIO_12, WIFI_IOT_IO_FUNC_GPIO_12_GPIO);
  64.     GpioSetDir(WIFI_IOT_IO_NAME_GPIO_12, WIFI_IOT_GPIO_DIR_OUT);

  66.     attr.name = "LightTask";
  67.     attr.attr_bits = 0U;
  68.     attr.cb_mem = NULL;
  69.     attr.cb_size = 0U;
  70.     attr.stack_mem = NULL;
  71.     attr.stack_size = LIGHT_TASK_STACK_SIZE;
  72.     attr.priority = LIGHT_TASK_PRIO;

  74.     if (osThreadNew((osThreadFunc_t)LightTask, NULL, &attr) == NULL) {
  75.         printf("[LightTask] Falied to create LightTask!n");
  76.     }
  77. }

  79. SYS_RUN(LightTaskEntry);
复制代码



2、beep.c
该C文件任务主要任务是通过按下按键，控制蜂鸣器发声。
新建任务，按下按键，蜂鸣器发声，松开按键，蜂鸣器停止发声。
这里要注意一下，按键的引脚信号为输入信号，初始化的时候，需要先进行上拉模式设置，要不然会一直检测到低电平。
  1. /*
  2. * Copyright (c) 2020 Huawei Device Co., Ltd.
  3. * Licensed under the Apache License, Version 2.0 (the "License");
  4. * you may not use this file except in compliance with the License.
  5. * You may obtain a copy of the License at
  6. *
  7. *     http://www.apache.org/licenses/LICENSE-2.0
  8. *
  9. * Unless required by applicable law or agreed to in writing, software
  10. * distributed under the License is distributed on an "AS IS" BASIS,
  11. * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  12. * See the License for the specific language governing permissions and
  13. * limitations under the License.
  14. */

  16. #include <stdio.h>

  18. #include <unistd.h>

  20. #include "ohos_init.h"
  21. #include "cmsis_os2.h"
  22. #include "wifiiot_gpio.h"
  23. #include "wifiiot_gpio_ex.h"

  25. #define BEEP_INTERVAL_TIME_US 1000000
  26. #define BEEP_TASK_STACK_SIZE 512
  27. #define BEEP_TASK_PRIO 27

  29. #define BEEP_GPIO  WIFI_IOT_IO_NAME_GPIO_9
  30. #define BUTTON_GPIO   WIFI_IOT_IO_NAME_GPIO_8

  32. #define BUTTON_CHECK_DELAY_US   5000


  35. static void *BeepTask(const char *arg)
  36. {
  37.     (void)arg;
  38.     while (1) {

  40.             WifiIotGpioValue buttonValue;
  41.             GpioGetInputVal(BUTTON_GPIO ,&buttonValue);
  42.             if(buttonValue == WIFI_IOT_GPIO_VALUE0){
  43.                 GpioSetOutputVal(BEEP_GPIO, 1);
  44.                 usleep(BUTTON_CHECK_DELAY_US);
  45.                 GpioSetOutputVal(BEEP_GPIO, 0);
  46.                 usleep(BUTTON_CHECK_DELAY_US);
  47.             }
  48.             usleep(BUTTON_CHECK_DELAY_US);

  50.         }

  52.     return NULL;
  53. }


  56. static void BeepTaskEntry(void)
  57. {

  59.     osThreadAttr_t attr;

  61.     GpioInit();
  62.     IoSetFunc(WIFI_IOT_IO_NAME_GPIO_8, WIFI_IOT_IO_FUNC_GPIO_8_GPIO);
  63.     GpioSetDir(WIFI_IOT_IO_NAME_GPIO_8, WIFI_IOT_GPIO_DIR_IN);
  64.     IoSetPull(WIFI_IOT_IO_NAME_GPIO_8,WIFI_IOT_IO_PULL_UP);

  66.     IoSetFunc(WIFI_IOT_IO_NAME_GPIO_9, WIFI_IOT_IO_FUNC_GPIO_9_GPIO);
  67.     GpioSetDir(WIFI_IOT_IO_NAME_GPIO_9, WIFI_IOT_GPIO_DIR_OUT);

  69.     attr.name = "BeepTask";
  70.     attr.attr_bits = 0U;
  71.     attr.cb_mem = NULL;
  72.     attr.cb_size = 0U;
  73.     attr.stack_mem = NULL;
  74.     attr.stack_size = BEEP_TASK_STACK_SIZE;
  75.     attr.priority = BEEP_TASK_PRIO;

  77.     if (osThreadNew((osThreadFunc_t)BeepTask, NULL, &attr) == NULL) {
  78.         printf("[BeepTask] Falied to create BeepTask!n");
  79.     }
  80. }

  82. SYS_RUN(BeepTaskEntry);
复制代码



3、BUILD.gn
对于我这种只习惯于IDE开发，对这类文件都不熟悉，但是这些都些东西都是有规律的，看其他的文件夹下的BUILD.gn是怎么编写的，然后复制更改。
  1. # Copyright (c) 2020 Huawei Device Co., Ltd.
  2. # Licensed under the Apache License, Version 2.0 (the "License");
  3. # you may not use this file except in compliance with the License.
  4. # You may obtain a copy of the License at
  5. #
  6. #     http://www.apache.org/licenses/LICENSE-2.0
  7. #
  8. # Unless required by applicable law or agreed to in writing, software
  9. # distributed under the License is distributed on an "AS IS" BASIS,
  10. # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  11. # See the License for the specific language governing permissions and
  12. # limitations under the License.

  14. static_library("ssl_example") {
  15.     sources = [
  16.         "light.c",
  17.         "beep.c"
  18.     ]

  20.     include_dirs = [
  21.         "//utils/native/lite/include",
  22.         "//kernel/liteos_m/components/cmsis/2.0",
  23.         "//base/iot_hardware/interfaces/kits/wifiiot_lite",
  24.     ]
  25. }
复制代码


这样还不行，还要修改app文件夹下的BUILD.gn。
app目录1.jpg

  1. # Copyright (c) 2020 Huawei Device Co., Ltd.
  2. # Licensed under the Apache License, Version 2.0 (the "License");
  3. # you may not use this file except in compliance with the License.
  4. # You may obtain a copy of the License at
  5. #
  6. #     http://www.apache.org/licenses/LICENSE-2.0
  7. #
  8. # Unless required by applicable law or agreed to in writing, software
  9. # distributed under the License is distributed on an "AS IS" BASIS,
  10. # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  11. # See the License for the specific language governing permissions and
  12. # limitations under the License.

  14. import("//build/lite/config/component/lite_component.gni")

  16. lite_component("app") {
  17.     features = [
  18.         "startup",
  19.         "SSL:ssl_example",
  20.     ]
  21. }
复制代码


三、编译下载
编译.JPG

下载验证成功。


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