#include <stdio.h>
#include <unistd.h>

#include "ohos_init.h"
#include "cmsis_os2.h"
#include "wifiiot_gpio.h"
#include "wifiiot_gpio_ex.h"

static void LedTask(void)
{
    //初始化GPIO
    GpioInit();
    //设置GPIO_2的复用功能为普通GPIO
    IoSetFunc(WIFI_IOT_IO_NAME_GPIO_2, WIFI_IOT_IO_FUNC_GPIO_2_GPIO);
    //设置GPIO_2为输出模式
    GpioSetDir(WIFI_IOT_GPIO_IDX_2, WIFI_IOT_GPIO_DIR_OUT);
    while (1)
    {
        //设置GPIO_2输出高电平点亮LED灯
        GpioSetOutputVal(WIFI_IOT_GPIO_IDX_2, 1);
        //延时1s
        usleep(1000000);
        //设置GPIO_2输出低电平熄灭LED灯
        GpioSetOutputVal(WIFI_IOT_GPIO_IDX_2, 0);
        //延时1s
        usleep(1000000);

    }
}

static void LedExampleEntry(void)
{
    osThreadAttr_t attr;

    attr.name = "LedTask";
    attr.attr_bits = 0U;
    attr.cb_mem = NULL;
    attr.cb_size = 0U;
    attr.stack_mem = NULL;
    attr.stack_size = 512;
    attr.priority = 25;

    if (osThreadNew((osThreadFunc_t)LedTask, NULL, &attr) == NULL)
    {
        printf("Falied to create LedTask!\n");
    }
}

APP_FEATURE_INIT(LedExampleEntry);

BUILD.gn文件：

static_library("led_example") {
    sources = [
        "led_example.c"
    ]

    include_dirs = [
        "//utils/native/lite/include",
        "//kernel/liteos_m/components/cmsis/2.0",
        "//base/iot_hardware/interfaces/kits/wifiiot_lite",
    ]
}

编译

烧录

读取GPIO引脚方向、输出电平值

编写业务代码

led_exmaple.c文件：

#include <stdio.h>
#include <unistd.h>

#include "ohos_init.h"
#include "cmsis_os2.h"
#include "wifiiot_gpio.h"
#include "wifiiot_gpio_ex.h"

static void LedTask(void)
{
    //初始化GPIO
    GpioInit();

    //设置GPIO_2的复用功能为普通GPIO
    IoSetFunc(WIFI_IOT_IO_NAME_GPIO_2, WIFI_IOT_IO_FUNC_GPIO_2_GPIO);

    //设置GPIO_2为输出模式
    GpioSetDir(WIFI_IOT_GPIO_IDX_2, WIFI_IOT_GPIO_DIR_OUT);

    WifiIotGpioDir val = {0};
    GpioGetDir(WIFI_IOT_GPIO_IDX_2,&val);
    printf("GPIO_2 Dir is %d\r\n",val);
    WifiIotGpioValue OutputVal = {0};

    while (1)
    {
        //设置GPIO_2输出高电平点亮LED灯
        GpioSetOutputVal(WIFI_IOT_GPIO_IDX_2, 1);
        GpioGetOutputVal(WIFI_IOT_GPIO_IDX_2,&OutputVal);
        printf("GPIO_2 OutputVal is %d\r\n",OutputVal);
        //延时1s
        usleep(1000000);

        //设置GPIO_2输出低电平熄灭LED灯
        GpioSetOutputVal(WIFI_IOT_GPIO_IDX_2, 0);
        GpioGetOutputVal(WIFI_IOT_GPIO_IDX_2,&OutputVal);
        printf("GPIO_2 OutputVal is %d\r\n",OutputVal);
        //延时1s
        usleep(1000000);
    }
}

static void LedExampleEntry(void)
{
    osThreadAttr_t attr;

    attr.name = "LedTask";
    attr.attr_bits = 0U;
    attr.cb_mem = NULL;
    attr.cb_size = 0U;
    attr.stack_mem = NULL;
    attr.stack_size = 512;
    attr.priority = 25;

    if (osThreadNew((osThreadFunc_t)LedTask, NULL, &attr) == NULL)
    {
        printf("Falied to create LedTask!\n");
    }
}

APP_FEATURE_INIT(LedExampleEntry);

BUILD.gn文件：

static_library("led_example") {
    sources = [
        "led_example.c"
    ]

    include_dirs = [
        "//utils/native/lite/include",
        "//kernel/liteos_m/components/cmsis/2.0",
        "//base/iot_hardware/interfaces/kits/wifiiot_lite",
    ]
}

编译

烧录

ADC

ADC API介绍

wifiiot_adc.h接口

1.AdcRead 根据输入参数从指定的ADC通道读取一段采样数据

参数说明

1.channel ADC通道

2.data 指示用于存放读取数据的地址的指针

3.equModel 表示平均算法的次数

4.curBais 表示模拟功率控制模式

5.rstCnt 指示从重置到转换开始的时间计数

查看ADC对应的GPIO引脚

将使用板载用户按键F1来模拟GPIO口电压的变化。GPIO_11对应的是ADC Channel 5，所以需要编写软件去读取ADC Channel 5的电压。

ADC读取GPIO的电压值

编写业务代码

adc.exmaple文件：

#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <math.h>

#include "ohos_init.h"
#include "cmsis_os2.h"
#include "wifiiot_gpio_ex.h"
#include "wifiiot_errno.h"
#include "wifiiot_adc.h"

#define ADC_TASK_STACK_SIZE 1024 * 8
#define ADC_TASK_PRIO 24

/***** 获取电压值函数 *****/
static float GetVoltage(void)
{
    unsigned int ret;
    unsigned short data;

    ret = AdcRead(WIFI_IOT_ADC_CHANNEL_5, &data, WIFI_IOT_ADC_EQU_MODEL_8, WIFI_IOT_ADC_CUR_BAIS_DEFAULT, 0xff);
    if (ret != WIFI_IOT_SUCCESS)
    {
        printf("ADC Read Fail\n");
    }

    return (float)data * 1.8 * 4 / 4096.0;
}

static void ADCTask(void)
{
    float voltage;

    //上拉，让按键未按下时GPIO_11保持高电平状态
    IoSetPull(WIFI_IOT_IO_NAME_GPIO_11, WIFI_IOT_IO_PULL_UP);
    while (1)
    {
        printf("=======================================\r\n");
        printf("***************ADC_example*************\r\n");
        printf("=======================================\r\n");

        //获取电压值
        voltage = GetVoltage();
        printf("vlt:%.3fV\n", voltage);

        //延时1s
        usleep(1000000);
    }
}

static void ADCExampleEntry(void)
{
    osThreadAttr_t attr;

    attr.name = "ADCTask";
    attr.attr_bits = 0U;
    attr.cb_mem = NULL;
    attr.cb_size = 0U;
    attr.stack_mem = NULL;
    attr.stack_size = ADC_TASK_STACK_SIZE;
    attr.priority = ADC_TASK_PRIO;

    if (osThreadNew((osThreadFunc_t)ADCTask, NULL, &attr) == NULL)
    {
        printf("[ADCExample] Falied to create ADCTask!\n");
    }
}

APP_FEATURE_INIT(ADCExampleEntry);

BUILD.gn文件：

static_library("adc_example") {
    sources = [
        "adc_example.c"
    ]

    include_dirs = [
        "//utils/native/lite/include",
        "//kernel/liteos_m/components/cmsis/2.0",
        "//base/iot_hardware/interfaces/kits/wifiiot_lite",
    ]
}