#创作者激励#【木棉花】：基于启航KP_IOT开发板的按键点灯案例 原创

#include <stdio.h>
#include <unistd.h>
#include "ohos_init.h"
#include "cmsis_os2.h"
#include "iot_gpio.h"

//GPIO8 控制 LED
#define LED_TASK_GPIO 8
//GPIO5 控制按键
#define IOT_GPIO_KEY 5
#define LED_INTERVAL_TIME 30
#define LED_TASK_STACK_SIZE 2048
#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){
        /*根据按键切换LED的显示状态*/
        printf("g_ledState = %d\n",g_ledState);
        switch(g_ledState){
            case LED_ON:
                IoTGpioSetOutputVal(LED_TASK_GPIO,0);
                osDelay(LED_INTERVAL_TIME);
                break;
            case LED_OFF:
                IoTGpioSetOutputVal(LED_TASK_GPIO,1);
                osDelay(LED_INTERVAL_TIME);
                break;
            case LED_SPARK:
                IoTGpioSetOutputVal(LED_TASK_GPIO,0);
                osDelay(LED_INTERVAL_TIME);
                IoTGpioSetOutputVal(LED_TASK_GPIO,1);
                osDelay(LED_INTERVAL_TIME);
                break;
            default:
                osDelay(LED_INTERVAL_TIME);
                break;
        }
    }
    return NULL;
}

unsigned int lastTickCount;
//中断回调函数，根据按键状态实现对应逻辑
static void OnButtonPressed(char *arg)
{
    (void) arg;
    //消除按键抖动
    unsigned int tickCount = osKernelGetTickCount();
    unsigned int count = tickCount - lastTickCount;
    lastTickCount = tickCount;

    if(count<50)
    {
        printf("----return\n");
        return ;
    }

    usleep(20*1000);

    /*按下按键的状态切换*/
    enum LedState nextState = LED_SPARK;

    switch(g_ledState){
        case LED_ON:
            nextState = LED_SPARK;
            break;
        case LED_OFF:
            nextState = LED_ON;
            break;
        case LED_SPARK:
            nextState = LED_OFF;
            break;
        default:
            break;
    }
    g_ledState = nextState;
    printf("nextState=%d\n",nextState);
}

static void LedExampleEntry(void)
{
 osThreadAttr_t attr;
 /*LED 的 GPIO 初始化*/
 IoTGpioInit(LED_TASK_GPIO);
 /*灯GPIO 设置为输出*/
 IoTGpioSetDir(LED_TASK_GPIO,IOT_GPIO_DIR_OUT);
 
 /*按键 GPIO 初始化*/
 IoTGpioInit(IOT_GPIO_KEY);
 IoTGpioSetFunc(IOT_GPIO_KEY, 0);
 /*按键 GPIO 初始化为输入*/
 IoTGpioSetDir(IOT_GPIO_KEY, IOT_GPIO_DIR_IN);
 IoTGpioSetPull(IOT_GPIO_KEY, 1);
/*注册按键执行函数*/
 IoTGpioRegisterIsrFunc(IOT_GPIO_KEY, IOT_INT_TYPE_EDGE, 
                        IOT_GPIO_EDGE_FALL_LEVEL_LOW,
                        OnButtonPressed,
                        NULL);
 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);
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static_library("keyled_example"){
    sources=[
        "key_led.c",
    ]

    include_dirs = [
        "//utils/native/lite/include",
        "//kernel/liteos_m/kal",
        "//base/iot_hardware/peripheral/interfaces/kits",
    ]
}
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"KP_KEY_led:keyled_example",
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#include <stdio.h>
#include <unistd.h>
#include "ohos_init.h"
#include "cmsis_os2.h"
#include "iot_gpio.h"

//GPIO8 控制 LED
#define LED_TASK_GPIO 8
//GPIO5 控制按键
#define IOT_GPIO_KEY 5
#define LED_INTERVAL_TIME 30
#define LED_TASK_STACK_SIZE 2048
#define LED_TASK_PRIO 25

static void Task(void)
{
    IotGpioValue Val={1};
    while(1){
        IoTGpioGetInputVal(IOT_GPIO_KEY,&Val);
        if(Val==0){
            //按键为低电平时，LED亮
            IoTGpioSetOutputVal(LED_TASK_GPIO,1);
        }else{
            IoTGpioSetOutputVal(LED_TASK_GPIO,0);
        }
        usleep(500*1000);
    }
}

static void LedExampleEntry(void)
{
 osThreadAttr_t attr;
 /*LED 的 GPIO 初始化*/
 IoTGpioInit(LED_TASK_GPIO);
 /*LED 的 GPIO 设置为输出*/
 IoTGpioSetDir(LED_TASK_GPIO,IOT_GPIO_DIR_OUT);
 
 /*按键 GPIO 初始化*/
 IoTGpioInit(IOT_GPIO_KEY);
 IoTGpioSetFunc(IOT_GPIO_KEY, 0);
 /*按键 GPIO 初始化为输入*/
 IoTGpioSetDir(IOT_GPIO_KEY, IOT_GPIO_DIR_IN);
 IoTGpioSetPull(IOT_GPIO_KEY, 1);

 attr.name = "Task";
 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)Task, NULL, &attr) == NULL) {
    printf("[LedExample] Falied to create Task!\n");
 }
}
SYS_RUN(LedExampleEntry);
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