#2020征文-开发板# Wi-Fi IoT 套件试用之OLED

使用WIFIIOT套件，直观交互最多的就是OLED。
源码LED_example.c里去.把所有的io_9改成11: 

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

    #include <stdio.h>

    #include <unistd.h>

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

    #define LED_INTERVAL_TIME_US 300000
    #define LED_TASK_STACK_SIZE 512
    #define LED_TASK_PRIO 25

    enum LedState
    {
        LED_ON = 0,
        LED_OFF,
        LED_SPARK,
    };

    enum LedState g_ledState = LED_SPARK;

    static void *LedTask(const char *arg)
    {
        (void)arg;
        while (1)
        {
            switch (g_ledState)
            {
            case LED_ON:
                GpioSetOutputVal(WIFI_IOT_IO_NAME_GPIO_11, 1);
                usleep(LED_INTERVAL_TIME_US);
                break;
            case LED_OFF:
                GpioSetOutputVal(WIFI_IOT_IO_NAME_GPIO_11, 0);
                usleep(LED_INTERVAL_TIME_US);
                break;
            case LED_SPARK:
                GpioSetOutputVal(WIFI_IOT_IO_NAME_GPIO_11, 0);
                usleep(LED_INTERVAL_TIME_US);
                GpioSetOutputVal(WIFI_IOT_IO_NAME_GPIO_11, 1);
                usleep(LED_INTERVAL_TIME_US);
                break;
            default:
                usleep(LED_INTERVAL_TIME_US);
                break;
            }
        }

        return NULL;
    }

    static void LedExampleEntry(void)
    {
        osThreadAttr_t attr;
        printf("LedExampleEntry\n");
        GpioInit();
        IoSetFunc(WIFI_IOT_IO_NAME_GPIO_11, WIFI_IOT_IO_FUNC_GPIO_11_GPIO);
        GpioSetDir(WIFI_IOT_IO_NAME_GPIO_11, WIFI_IOT_GPIO_DIR_OUT);

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

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

    SYS_RUN(LedExampleEntry);