include $(LITEOSTOPDIR)/../../drivers/adapter/khdf/liteos/lite.mk
 
MODULE_NAME := hdf_led_driver
LOCAL_SRCS += led.c
LOCAL_INCLUDE := ./include
LOCAL_CFLAGS += -fstack-protector-strong -Wextra -Wall -Werror
include $(HDF_DRIVER)

## 在頭部添加變數
VENDOR_HDF_DRIVERS_ROOT := $(LITEOSTOPDIR)/../../vendor/huawei/hdf
 
 
LITEOS_BASELIB += -lhdf_led_driver
LIB_SUBDIRS    += $(VENDOR_HDF_DRIVERS_ROOT)/LED/src

#include "hdf_device_desc.h" // HDF框架對驅動開放相關能力介面的頭文件
#include "hdf_log.h"         // HDF 框架提供的日誌介面頭文件
#include "device_resource_if.h"
#include "osal_io.h"
#include "osal_mem.h"
#include "gpio_if.h"
#include "osal_irq.h"
#include "osal_time.h"
 
#define HDF_LOG_TAG led_driver // 列印日誌所包含的標籤，如果不定義則用默認定義的HDF_TAG標籤
#define LED_WRITE_READ 1       // 讀寫操作碼1
 
static int32_t CtlLED(int mode)
{
    int32_t ret;
    uint16_t valRead;
    /* LED的GPIO管腳號 */
    uint16_t gpio = 5 * 8 + 1;  // 紅外補光燈
    // uint16_t gpio = 2 * 8 + 3;  // 綠色指示燈
    // uint16_t gpio = 3 * 8 + 4;  // 紅色指示燈
 
    /* 將GPIO管腳配置為輸出 */
    ret = GpioSetDir(gpio, GPIO_DIR_OUT);
    if (ret != 0)
    {
        HDF_LOGE("GpioSerDir: failed, ret %d\n", ret);
        return ret;
    }
 
    if (mode == -1)
    {
        // 翻轉輸出口
        (void)GpioRead(gpio, &valRead);
        ret = GpioWrite(gpio, (valRead == GPIO_VAL_LOW) ? GPIO_VAL_HIGH : GPIO_VAL_LOW);
    }
    else
    {
        ret = GpioWrite(gpio, mode);
    }
 
    if (ret != 0)
    {
        HDF_LOGE("GpioWrite: failed, ret %d\n", ret);
        return ret;
    }
    return ret;
}
 
// Dispatch是用來處理用戶態發下來的消息
int32_t LedDriverDispatch(struct HdfDeviceIoClient *client, int cmdCode, struct HdfSBuf *data, struct HdfSBuf *reply)
{
    int32_t result = HDF_FAILURE;
    HDF_LOGE("Led driver dispatch");
    if (client == NULL || client->device == NULL)
    {
        HDF_LOGE("Led driver device is NULL");
        return HDF_ERR_INVALID_OBJECT;
    }
 
    switch (cmdCode){
        case LED_WRITE_READ:
            const char *recv = HdfSbufReadString(data);
            if (recv != NULL)
            {
                //HDF_LOGI("recv: %s", recv);
                result = CtlLED(-1);
                // CtlLED(GPIO_VAL_HIGH);
                if (!HdfSbufWriteInt32(reply, result)){
                    //HDF_LOGE("replay is fail");
                }
                return HdfDeviceSendEvent(client->device, cmdCode, data);
            }
            break;
 
        default:
            break;
    }
    return result;
}
 
//驅動對外提供的服務能力，將相關的服務介面綁定到HDF框架
int32_t HdfLedDriverBind(struct HdfDeviceObject *deviceObject)
{
    if (deviceObject == NULL)
    {
        HDF_LOGE("Led driver bind failed!");
        return HDF_ERR_INVALID_OBJECT;
    }
    static struct IDeviceIoService ledDriver = {
        .Dispatch = LedDriverDispatch,
    };
    deviceObject->service = (struct IDeviceIoService *)(&ledDriver);
    HDF_LOGD("Led driver bind success");
    return HDF_SUCCESS;
}
 
// 驅動自身業務初始的介面
int32_t HdfLedDriverInit(struct HdfDeviceObject *deviceObject)
{
    if (deviceObject == NULL)
    {
        HDF_LOGE("Led driver Init failed!");
        return HDF_ERR_INVALID_OBJECT;
    }
    HDF_LOGD("Led driver Init success");
    return HDF_SUCCESS;
}
 
// 驅動資源釋放的介面
void HdfLedDriverRelease(struct HdfDeviceObject *deviceObject)
{
    if (deviceObject == NULL)
    {
        HDF_LOGE("Led driver release failed!");
        return;
    }
 
    HDF_LOGD("Led driver release success");
    return;
}
 
// 定義驅動入口的對象，必須為HdfDriverEntry（在hdf_device_desc.h中定義）類型的全局變數
struct HdfDriverEntry g_ledDriverEntry = {
    .moduleVersion = 1,
    .moduleName = "led_driver",
    .Bind = HdfLedDriverBind,
    .Init = HdfLedDriverInit,
    .Release = HdfLedDriverRelease,
};
 
// 調用HDF_INIT將驅動入口註冊到HDF框架中，在載入驅動時HDF框架會先調用Bind函數,再調用Init函數載入該驅動，當Init調用異常時，HDF框架會調用Release釋放驅動資源並退出。
HDF_INIT(g_ledDriverEntry);

#include <stdio.h>
#include <fcntl.h>
#include <sys/stat.h>
#include <sys/ioctl.h>
#include <unistd.h>
#include "hdf_log.h"
#include "hdf_sbuf.h"
#include "hdf_io_service_if.h"
 
 
#define LED_WRITE_READ 1
#define HDF_LOG_TAG LED_APP
#define LED_SERVICE "led_service"
 
// 接收驅動上報事件
static int OnDevEventReceived(void *priv, uint32_t id, struct HdfSBuf *data)
{
    const char *string = HdfSbufReadString(data);
    if (string == NULL)
    {
        HDF_LOGE("fail to read string in event data");
        return HDF_FAILURE;
    }
    HDF_LOGE("%s: dev event received: %u %s", (char *)priv, id, string);
 
    return HDF_SUCCESS;
}
 
static int SendEvent(struct HdfIoService *serv, char *eventData)
{
    int ret = 0;
    struct HdfSBuf *data = HdfSBufObtainDefaultSize();
    if (data == NULL)
    {
        HDF_LOGE("fail to obtain sbuf data");
        return 1;
    }
 
    struct HdfSBuf *reply = HdfSBufObtainDefaultSize();
    if (reply == NULL)
    {
        HDF_LOGE("fail to obtain sbuf reply");
        ret = HDF_DEV_ERR_NO_MEMORY;
        goto out;
    }
 
    if (!HdfSbufWriteString(data, eventData))
    {
        HDF_LOGE("fail to write sbuf");
        ret = HDF_FAILURE;
        goto out;
    }
 
    ret = serv->dispatcher->Dispatch(&serv->object, LED_WRITE_READ, data, reply);
    if (ret != HDF_SUCCESS)
    {
        HDF_LOGE("fail to send service call");
        goto out;
    }
 
    int replyData = 0;
    if (!HdfSbufReadInt32(reply, &replyData))
    {
        HDF_LOGE("fail to get service call reply");
        ret = HDF_ERR_INVALID_OBJECT;
        goto out;
    }
    HDF_LOGE("Get reply is: %d", replyData);
out:
    HdfSBufRecycle(data);
    HdfSBufRecycle(reply);
    return ret;
}
  
int main(void)
{
    struct HdfIoService *serv = HdfIoServiceBind(LED_SERVICE);// 用戶態獲取驅動的服務
    if (serv == NULL)
    {
        HDF_LOGE("fail to get service %s", LED_SERVICE);
        return HDF_FAILURE;
    }
    static struct HdfDevEventlistener listener = {
        .callBack = OnDevEventReceived,
        .priv = "Service0"};
 
    // 用戶態程式註冊接收驅動上報事件的操作方法。
    if (HdfDeviceRegisterEventListener(serv, &listener) != HDF_SUCCESS)
    {
        HDF_LOGE("fail to register event listener");
        return HDF_FAILURE;
    }
 
    char *send_cmd = "toggle LED";
    while (1)
    {
        if (SendEvent(serv, send_cmd))
        {
            HDF_LOGE("fail to send event");
            return HDF_FAILURE;
        }
        sleep(1);
    }
 
    if (HdfDeviceUnregisterEventListener(serv, &listener))
    {
        HDF_LOGE("fail to  unregister listener");
        return HDF_FAILURE;
    }
 
    HdfIoServiceRecycle(serv);// 釋放驅動服務。
    HDF_LOGI("exit");
 
    return HDF_SUCCESS;
}

# 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
#
#     //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.
 
HDF_FRAMEWORKS = "//drivers/framework"
 
 
# 暫時放在這裡編譯用戶態設備驅動消息調用程式，回頭在考慮移到獨立組件去編譯Gavin Lee
executable("CallLED") {
            sources = [
                "//vendor/huawei/hdf/LED/dispatch/CallLED.c"
            ]
 
            include_dirs = [
                "//vendor/huawei/hdf/LED/include",
                "$HDF_FRAMEWORKS/core/adapter/vnode/include",
                "$HDF_FRAMEWORKS/core/adapter/syscall/include",
                "$HDF_FRAMEWORKS/core/shared/include",
                "$HDF_FRAMEWORKS/core/host/include",
                "$HDF_FRAMEWORKS/core/manager/include",
                "$HDF_FRAMEWORKS/ability/sbuf/include",
                "$HDF_FRAMEWORKS/include/core",
                "$HDF_FRAMEWORKS/include/utils",
                "$HDF_FRAMEWORKS/utils/include",
                "$HDF_FRAMEWORKS/include/osal",
                "$HDF_FRAMEWORKS/../adapter/uhdf/posix/include",
                "//third_party/bounds_checking_function/include",
                "//base/hiviewdfx/hilog_lite/interfaces/native/innerkits",
           ]
               
            deps = [
                "//base/hiviewdfx/hilog_lite/frameworks/featured:hilog_shared",
                "//drivers/adapter/uhdf/posix:hdf_posix",
                "//drivers/adapter/uhdf/manager:hdf_core", 
                "//drivers/adapter/uhdf/posix:hdf_posix_osal"
            ]
 
            public_deps = [
                "//third_party/bounds_checking_function:libsec_shared",
                ]
 
            defines = [
                "__USER__",
            ]
 
            cflags = [
                "-Wall",
                "-Wextra",
                "-Werror",
            ]
        }

import("//build/lite/config/component/lite_component.gni")
 
lite_component("led_gpio"){
    features = ["dispatch:CallLED"]
}

./bin/CallLED