鸿蒙HI3516-驱动开发(1.1-LTS)

代码在：https://gitee.com/kwydm/open-harmony-taurus

目录大致结构

1.驱动开发

创建目录：//vendor/huawei/hdf/LED/src

新建Makefile

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

打开//device/hisilicon/drivers/lite.mk 编译结果文件链接到内核镜像

## 在头部添加变量
VENDOR_HDF_DRIVERS_ROOT := $(LITEOSTOPDIR)/../../vendor/huawei/hdfLITEOS_BASELIB += -lhdf_led_driver
LIB_SUBDIRS    += $(VENDOR_HDF_DRIVERS_ROOT)/LED/src

新建led.c

#include "hdf_device_desc.h" // HDF框架对驱动开放相关能力接口的头文件
#include "hdf_log.h"         // HDF 框架提供的日志接口头文件
#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 // 打印日志所包含的标签，如果不定义则用默认定义的HDF_TAG标签
#define LED_WRITE_READ 1       // 读写操作码1static int32_t CtlLED(int mode)
{int32_t ret;uint16_t valRead;/* LED的GPIO管脚号 */uint16_t gpio = 5 * 8 + 1;  // 红外补光灯// uint16_t gpio = 2 * 8 + 3;  // 绿色指示灯// uint16_t gpio = 3 * 8 + 4;  // 红色指示灯/* 将GPIO管脚配置为输出 */ret = GpioSetDir(gpio, GPIO_DIR_OUT);if (ret != 0){HDF_LOGE("GpioSerDir: failed, ret %d\n", ret);return ret;}if (mode == -1){// 翻转输出口(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是用来处理用户态发下来的消息
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;
}//驱动对外提供的服务能力，将相关的服务接口绑定到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;
}// 驱动自身业务初始的接口
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;
}// 驱动资源释放的接口
void HdfLedDriverRelease(struct HdfDeviceObject *deviceObject)
{if (deviceObject == NULL){HDF_LOGE("Led driver release failed!");return;}HDF_LOGD("Led driver release success");return;
}// 定义驱动入口的对象，必须为HdfDriverEntry（在hdf_device_desc.h中定义）类型的全局变量
struct HdfDriverEntry g_ledDriverEntry = {.moduleVersion = 1,.moduleName = "led_driver",.Bind = HdfLedDriverBind,.Init = HdfLedDriverInit,.Release = HdfLedDriverRelease,
};// 调用HDF_INIT将驱动入口注册到HDF框架中，在加载驱动时HDF框架会先调用Bind函数,再调用Init函数加载该驱动，当Init调用异常时，HDF框架会调用Release释放驱动资源并退出。
HDF_INIT(g_ledDriverEntry);

2.用户态

\vendor\huawei\hdf\LED\dispatch\CallLED.c

#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"// 接收驱动上报事件
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);// 用户态获取驱动的服务if (serv == NULL){HDF_LOGE("fail to get service %s", LED_SERVICE);return HDF_FAILURE;}static struct HdfDevEventlistener listener = {.callBack = OnDevEventReceived,.priv = "Service0"};// 用户态程序注册接收驱动上报事件的操作方法。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);// 释放驱动服务。HDF_LOGI("exit");return HDF_SUCCESS;
}

\vendor\huawei\hdf\LED\dispatch\BUILD.gn

# 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.HDF_FRAMEWORKS = "//drivers/framework"# 暂时放在这里编译用户态设备驱动消息调用程序，回头在考虑移到独立组件去编译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",]}

vendor\huawei\hdf\LED\BUILD.gn

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

build\lite\components\drivers.json

3.烧录运行

串口发送下面的代码

./bin/CallLED

执行之后这个补光灯会1S闪一次

参考：https://harmonyos.51cto.com/posts/2820，Gavin，Dweb九弓子

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鸿蒙HI3516-驱动开发(1.1-LTS)

鸿蒙HI3516-驱动开发(1.1-LTS)

1.驱动开发

2.用户态

3.烧录运行

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