活动：第一次抽奖中奖名单：第二次问答活动：第三次问答活动：第二次抽奖中奖名单：第四次问答活动：第三
2021-04-17 10:30
描述SpaceX星际飞船受SpaceX 星际飞船的启发，这款PCB类似于 SpaceX 星际飞船的形状。我设计了一个 SpaceX
2022-07-15 06:45
电工学第七版下册课后答案
2022-01-27 13:49
第七期了，慢慢开始了解labview的用法了，希望更加深入了解并灵活运用，互勉互励！！！！
2018-09-11 20:05
。第二次:移植Android过程的报告。第三次:安装HDMI驱动测试显示的报告。第四次：安装摄像头驱动并测试显示。第五次：安装GPS驱动并测试。第六
2017-04-25 16:16
《测控电路》习题完整参考答案（第七章）
2017-05-07 11:38
为什么我使用的第七实验上位机与飞控板连不上，急求帮助
2019-04-28 09:56
，是生态链的成熟！ • NB-IoT将成为5G新基建生态中最重要的节点技术之一！ 濎通芯2020第七届中国IoT大会Wi-SUN智能城市应用简介：Wi-SUN智能城市应用：长距离、大规模、自组网、自修
2020-12-14 15:59
谁？我！是你？是我！你终于来了！我终于来了！你终究是来了？我终究是来了！你来干什么!我来写服务订阅！鸿蒙lite-a的驱动开发，我们其实就是为了实现HdfDriverEntry结构体，驱动框架完成大部分驱动加载的动作，用户只需注册自己所需的接口和配置，然后驱动框架就会根据解析，完成驱动加载和初始化动作。开发者基于HDF驱动框架开发的驱动主要包含三大部分：1、驱动程序部分 - 完成驱动的功能逻辑2、驱动配置信息 - 指示驱动的加载信息内容3、驱动资源配置 - 配置驱动的硬件配置信息。驱动程序主要是完成驱动功能的开发部分：对于开发者首先看到的是驱动入口部分，驱动入口部分通过DriverEntry对齐进行描述。其中主要包含bind, init 和release三个接口。本文主要说的是驱动订阅服务。要实现订阅，需要在device_info.hcs文件中修改policy字段，该字段policy是驱动服务发布的策略typedef enum {/* 驱动不提供服务 */SERVICE_POLICY_NONE = 0,/* 驱动对内核态发布服务 */SERVICE_POLICY_PUBLIC = 1,/* 驱动对内核态和用户态都发布服务 */SERVICE_POLICY_CAPACITY = 2,/* 驱动服务不对外发布服务，但可以被订阅 */SERVICE_POLICY_FRIENDLY = 3,/* 驱动私有服务不对外发布服务，也不能被订阅 */SERVICE_POLICY_PRIVATE = 4,/* 错误的服务策略 */SERVICE_POLICY_INVALID} ServicePolicy;当对驱动（同一个host）加载的时机不感知时，可以通过HDF框架提供的订阅机制来订阅该驱动，当该驱动加载完成时，HDF框架会将被订阅的驱动服务发布给订阅者，我们先实现一个自定义结构体struct ILedService { struct IDeviceIoService ioService;// 服务结构的首个成员必须是IDeviceIoService类型的成员 int32_t (*LedServiceA)(void);// 驱动的第一个服务接口 int32_t (*LedServiceB)(uint32_t inputCode); // 驱动的第二个服务接口，有多个可以依次往下累加};在驱动的绑定程序中，实现服务函数的初始化static struct ILedService ledDriver = {.ioService.object = {0},.ioService.Dispatch = led_dispatch,.LedServiceA = service_funA,.LedServiceB = service_funB, };object->service = &ledDriver.ioService;然后可以来实现service_funA和service_funB函数，我的函数如下int32_t service_funA(){ HDF_LOGE("%s: serviceA ok", __func__); int i = 5; while(i--) {GpioWrite(gpio, 1);OsalSleep(1);GpioWrite(gpio, 0);OsalSleep(1); } return 0;}int32_t service_funB(uint32_t inputCode){ HDF_LOGE("%s: serviceB ok", __func__); HDF_LOGE("inputCode: %d",inputCode); return 0;}通过回调函数可以调用这两个服务函数，我的回调函数如下int32_t TestDriverSubCallBack(struct HdfDeviceObject *deviceObject, const struct HdfObject *service){ (void)*deviceObject; const struct ILedService *sampleService =(const struct ILedService *)service; if (sampleService == NULL) {return -1; } sampleService->LedServiceA(); sampleService->LedServiceB(5); return 0;}这个函数就是简单的两个服务函数的调用。主要函数就是这样。Test.c如下/* * Copyright (c) Huawei Technologies Co., Ltd. 2020-2020. All rights reserved. * Description: ft6236 touch driver implement. * Author: zhaihaipeng * Create: 2020-07-25 */#include #include #include #include #include #include #include #include #include "gpio_if.h"#include "hdf_device_desc.h"#include "hdf_log.h"#include "osal_irq.h"#include "osal_mem.h"#include "osal_time.h"#include "led_dev.h"#define LED_WRITE_READ 123uint16_t gpio = 19; /*待测试的GPIO管脚号 */#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struct ILedService { struct IDeviceIoService ioService;// 服务结构的首个成员必须是IDeviceIoService类型的成员 int32_t (*LedServiceA)(void);// 驱动的第一个服务接口 int32_t (*LedServiceB)(uint32_t inputCode); // 驱动的第二个服务接口，有多个可以依次往下累加};int32_t led_dispatch(struct HdfDeviceIoClient *deviceObject, int cmdId, struct HdfSBuf *data, struct HdfSBuf *reply){ HDF_LOGE("%s:Dispatch,cmd:%d", __func__,cmdId); if(cmdId == LED_WRITE_READ) {const char *readData = HdfSbufReadString(data);if (readData != NULL) {HDF_LOGE("%s: read data is: %s", __func__, readData);}if (!HdfSbufWriteInt32(reply, INT32_MAX)) {HDF_LOGE("%s: reply int32 fail", __func__);}return HdfDeviceSendEvent(deviceObject->device, cmdId, data); } return HDF_FAILURE;}int32_t service_funA(){ HDF_LOGE("%s: serviceA ok", __func__); int i = 5; while(i--) {GpioWrite(gpio, 1);OsalSleep(1);GpioWrite(gpio, 0);OsalSleep(1); } return 0;}int32_t service_funB(uint32_t inputCode){ HDF_LOGE("%s: serviceB ok", __func__); HDF_LOGE("inputCode: %d",inputCode); return 0;}int32_t led_bind(struct HdfDeviceObject *object){ HDF_LOGI("%s: led_bind", __func__); if (object == NULL) {HDF_LOGE("%s: param is null", __func__);return HDF_ERR_INVALID_PARAM; } static struct ILedService ledDriver = {.ioService.object = {0},.ioService.Dispatch = led_dispatch,.LedServiceA = service_funA,.LedServiceB = service_funB, }; object->service = &ledDriver.ioService; return HDF_SUCCESS;}// 订阅回调函数的编写，当被订阅的驱动加载完成后，HDF框架会将被订阅驱动的服务发布给订阅者，通过这个回调函数给订阅者使用// object为订阅者的私有数据，service为被订阅的服务对象int32_t TestDriverSubCallBack(struct HdfDeviceObject *deviceObject, const struct HdfObject *service){ (void)*deviceObject; const struct ILedService *sampleService =(const struct ILedService *)service; if (sampleService == NULL) {return -1; } sampleService->LedServiceA(); sampleService->LedServiceB(5); return 0;}int led_init(struct HdfDeviceObject *deviceObject){ HDF_LOGI("%s: led_init", __func__); GpioSetDir(gpio, GPIO_DIR_OUT);//设置GPIO管脚方向,输出 if (deviceObject == NULL) {HDF_LOGE("Test driver init failed, deviceObject is null!");return -1; } struct SubscriberCallback callBack; callBack.deviceObject = deviceObject; callBack.OnServiceConnected = TestDriverSubCallBack; int32_t ret = HdfDeviceSubscribeService(deviceObject, "HDF_PLATFORM_LED", callBack); if (ret != 0) {HDF_LOGE("Test driver subscribe led driver failed!"); } return ret;}void led_release(struct HdfDeviceObject *deviceObject){ HDF_LOGD("led driver release success"); return;}struct HdfDriverEntry g_ledDevEntry = { .moduleVersion = 1, .moduleName = "HDF_PLATFORM_LED", .Bind = led_bind, .Init = led_init, .Release = led_release,};HDF_INIT(g_ledDevEntry);main.c如下#include "hdf_log.h"#include "osal_mem.h"#include "hdf_io_service_if.h"#include #include #include #include #include #include "osal_time.h"// #include "hdf_device_desc.h"//#include "hdf_device_section.h"#include // #include // #include // #include // #include #include // #include // #include // #include "gpio_if.h"#include "hdf_device_desc.h"// #include "hdf_log.h"#include "osal_irq.h"// #include "osal_mem.h"// #include "osal_time.h"#include #include "hdf_***uf.h"#include "led_dev.h"#define SAMPLE_WRITE_READ 123 // 读写操作码1int g_replyFlag = 0;struct ILedService { struct IDeviceIoService ioService;// 服务结构的首个成员必须是IDeviceIoService类型的成员 int32_t (*LedServiceA)(void);// 驱动的第一个服务接口 int32_t (*LedServiceB)(uint32_t inputCode); // 驱动的第二个服务接口，有多个可以依次往下累加};static int SendEvent(struct HdfIoService *serv, char *eventData){ int ret = 0; struct HdfSBuf *data = HdfSBufObtainDefaultSize(); if (data == NULL) {HDF_LOGE("fail to obtain ***uf data");return 1; } struct HdfSBuf *reply = HdfSBufObtainDefaultSize(); if (reply == NULL) {HDF_LOGE("fail to obtain ***uf reply");ret = HDF_DEV_ERR_NO_MEMORY;goto out; } if (!HdfSbufWriteString(data, eventData)) {HDF_LOGE("fail to write ***uf");ret = HDF_FAILURE;goto out; } ret = serv->dispatcher->Dispatch(&serv->object, SAMPLE_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;}static int OnDevEventReceived(void *priv,uint32_t id, struct HdfSBuf *data){HDF_LOGE("%s: OnDevEventReceived", __func__); const char *string = HdfSbufReadString(data); if (string == NULL) {HDF_LOGE("fail to read string in event data");g_replyFlag = 1;return HDF_FAILURE; } HDF_LOGE("%s: dev event received: %u %s",(char *)priv, id, string); g_replyFlag = 1; return HDF_SUCCESS;}int main(){char *sendData = "default event info"; struct HdfIoService *serv = HdfIoServiceBind("HDF_PLATFORM_LED", 0); if (serv == NULL) {HDF_LOGE("fail to get service %s", "HDF_PLATFORM_LED");return HDF_FAILURE; } static struct HdfDevEventlistener listener = {.callBack = OnDevEventReceived,.priv ="Service0" }; if (HdfDeviceRegisterEventListener(serv, &listener) != HDF_SUCCESS) {HDF_LOGE("fail to register event listener");return HDF_FAILURE; } if (SendEvent(serv, sendData)) {HDF_LOGE("fail to send event");return HDF_FAILURE; } /* wait for event receive event finishing */ while (g_replyFlag == 0) {sleep(1); } if (HdfDeviceUnregisterEventListener(serv, &listener)) {HDF_LOGE("fail tounregister listener");return HDF_FAILURE; } HdfIoServiceRecycle(serv); return HDF_SUCCESS;}
2021-01-14 23:08
如果点亮第七个led是不是只用改board_ddr200t.h里边的和main。c里边的，还要在哪个.h文件修改吗?我的main函数是对的，就是第七个led不亮不知道哪里出了问题
2023-08-12 06:01
