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README
Apache-2.0

Input

简介

该仓下主要包含Input模块HDI(Hardware Driver Interface)接口定义及其实现,对上层输入服务提供操作input设备的驱动能力接口,HDI接口主要包括如下三大类:

  • InputManager:管理输入设备,包括输入设备的打开、关闭、设备列表信息获取等;
  • InputReporter:负责输入事件的上报,包括注册、注销数据上报回调函数等;
  • InputController:提供input设备的业务控制接口,包括获取器件信息及设备类型、设置电源状态等。

图 1 INPUT模块HDI接口层框架图

目录

该仓下源代码目录结构如下所示

/drivers/peripheral/input
├── hal                # input模块的hal层代码
│   └── include       # input模块hal层内部的头文件
│   └── src           # input模块hal层代码的具体实现
├── interfaces         # input模块对上层服务提供的驱动能力接口
│   └── include       # input模块对外提供的接口定义
├── test               # input模块的测试代码
│   └── unittest      # input模块的单元测试代码

接口说明

Input驱动提供给系统服务Input Service可直接调用的驱动能力接口,按照属性分类三类:input设备管理模块、input数据上报模块、input业务控制模块,例如提供输入设备打开及关闭接口、注册设备监听的回调接口、设备信息查询接口、电源状态控制接口等。

提供的部分接口说明如表1 Input HDI接口列表所示:

表 1 Input HDI接口列表

头文件

接口名称

功能描述

input_manager.h

int32_t (*OpenInputDevice)(uint32_t devIndex);

打开input设备

int32_t (*CloseInputDevice)(uint32_t devIndex);

关闭input设备

int32_t (*GetInputDevice)(uint32_t devIndex, DeviceInfo **devInfo);

获取指定ID的设备信息

int32_t (*GetInputDeviceList)(uint32_t *devNum, DeviceInfo **devList, uint32_t size);

获取所有设备列表信息

input_reporter.h

int32_t (*RegisterReportCallback)(uint32_t devIndex, InputReportEventCb *callback);

注册input设备的回调

int32_t (*UnregisterReportCallback)(uint32_t devIndex);

注销input设备的回调

void (*ReportEventPkgCallback)(const EventPackage **pkgs, uint32_t count);

上报数据的回调函数

input_controller.h

int32_t (*SetPowerStatus)(uint32_t devIndex, uint32_t status);

设置电源状态

int32_t (*GetPowerStatus)(uint32_t devIndex, uint32_t *status);

获取电源状态

int32_t (*GetDeviceType)(uint32_t devIndex, uint32_t *deviceType);

获取设备类型

int32_t (*GetChipInfo)(uint32_t devIndex, char *chipInfo, uint32_t length);

获取器件编码信息

int32_t (*GetVendorName)(uint32_t devIndex, char *vendorName, uint32_t length);

获取模组厂商名

int32_t (*GetChipName)(uint32_t devIndex, char *chipName, uint32_t length);

获取芯片厂商名

int32_t (*SetGestureMode)(uint32_t devIndex, uint32_t gestureMode);

设置手势模式

int32_t (*RunCapacitanceTest)(uint32_t devIndex, uint32_t testType, char *result, uint32_t length);

执行容值自检测试

int32_t (*RunExtraCommand)(uint32_t devIndex, InputExtraCmd *cmd);

执行拓展指令

使用说明

该仓核心功能是提供Input驱动能力接口供上层输入系统服务调用,提供的驱动能力接口统一归属为HDI接口层。

通过如下简要示例代码说明Input HDI接口的使用:

#include "input_manager.h"
#define DEV_INDEX 1

IInputInterface *g_inputInterface;
InputReportEventCb g_callback;

/* 定义数据上报的回调函数 */
static void ReportEventPkgCallback(const EventPackage **pkgs, uint32_t count)
{
    if (pkgs == NULL || count > MAX_PKG_NUM) {
        return;
    }
    for (uint32_t i = 0; i < count; i++) {
        HDF_LOGI("%s: pkgs[%d] = 0x%x, 0x%x, %d", __func__, i, pkgs[i]->type, pkgs[i]->code, pkgs[i]->value);
    }
}

int InputServiceSample(void)
{
    uint32_t devType = INIT_DEFAULT_VALUE;

    /* 获取Input驱动能力接口 */
    int ret = GetInputInterface(&g_inputInterface);
    if (ret != INPUT_SUCCESS) {
        HDF_LOGE("%s: get input interfaces failed, ret = %d", __func__, ret);
        return ret;
    }

    INPUT_CHECK_NULL_POINTER(g_inputInterface, INPUT_NULL_PTR);
    INPUT_CHECK_NULL_POINTER(g_inputInterface->iInputManager, INPUT_NULL_PTR);
    /* 打开特定的input设备 */
    ret = g_inputInterface->iInputManager->OpenInputDevice(DEV_INDEX);
    if (ret) {
        HDF_LOGE("%s: open input device failed, ret = %d", __func__, ret);
 	return ret;
    }

    INPUT_CHECK_NULL_POINTER(g_inputInterface->iInputController, INPUT_NULL_PTR);
    /* 获取对应input设备的类型 */
    ret = g_inputInterface->iInputController->GetDeviceType(DEV_INDEX, &devType);
    if (ret) {
        HDF_LOGE("%s: get device type failed, ret: %d", __FUNCTION__, ret);
        return ret;
    }
    HDF_LOGI("%s: device1's type is %u\n", __FUNCTION__, devType);

    /* 给特定的input设备注册数据上报回调函数 */
    g_callback.ReportEventPkgCallback = ReportEventPkgCallback;
    INPUT_CHECK_NULL_POINTER(g_inputInterface->iInputReporter, INPUT_NULL_PTR);
    ret  = g_inputInterface->iInputReporter->RegisterReportCallback(DEV_INDEX, &g_callback);
    if (ret) {
        HDF_LOGE("%s: register callback failed, ret: %d", __FUNCTION__, ret);
	return ret;
    }
    HDF_LOGI("%s: wait 10s for testing, pls touch the panel now", __FUNCTION__);
    OsalMSleep(KEEP_ALIVE_TIME_MS);

    /* 注销特定input设备上的回调函数 */
    ret  = g_inputInterface->iInputReporter->UnregisterReportCallback(DEV_INDEX);
    if (ret) {
        HDF_LOGE("%s: unregister callback failed, ret: %d", __FUNCTION__, ret);
        return ret;
    }

    /* 关闭特定的input设备 */
    ret = g_inputInterface->iInputManager->CloseInputDevice(DEV_INDEX);
    if (ret) {
        HDF_LOGE("%s: close device failed, ret: %d", __FUNCTION__, ret);
	return ret;
    }
    return 0;
}

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