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提交 d448a811 编写于 作者: W wangyipeng
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fix:It is a description of the innerkits interface, and developers do not pay attention to it 

Signed-off-by: Nwangyipeng <wangyipeng11@huawei.com>
上级 266f0426
隐藏空白更改
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zh-cn/device-dev/subsystems/Readme-CN.md
浏览文件 @ d448a811
......@@ -50,10 +50,6 @@
- [Sensor服务概述](subsys-sensor-overview.md)
- [Sensor服务使用指导](subsys-sensor-guide.md)
- [Sensor服务使用实例](subsys-sensor-demo.md)
- USB服务
- [USB服务概述](subsys-usbservice-overview.md)
- [USB服务使用指导](subsys-usbservice-guide.md)
- [USB服务使用实例](subsys-usbservice-demo.md)
- 用户程序框架
- [概述](subsys-application-framework-overview.md)
- [搭建环境](subsys-application-framework-envbuild.md)
......@@ -111,4 +107,4 @@
- [hiperf使用指导](subsys-toolchain-hiperf.md)
- 电源管理
- 显示管理
- [系统亮度范围定制开发指导](subsys-power-brightness-customization.md)
\ No newline at end of file
- [系统亮度范围定制开发指导](subsys-power-brightness-customization.md)
zh-cn/device-dev/subsystems/subsys-usbservice-demo.md 已删除 100644 → 0
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# USB服务子系统使用实例<a name="ZH-CN_TOPIC_0000001092792986"></a>
```cpp
#include <cstdio>
#include <iostream>
#include <map>
#include <mutex>
#include <sstream>
#include <sys/time.h>
#include "if_system_ability_manager.h"
#include "ipc_skeleton.h"
#include "iremote_object.h"
#include "iservice_registry.h"
#include "iusb_srv.h"
#include "string_ex.h"
#include "system_ability_definition.h"
#include "usb_common.h"
#include "usb_device.h"
#include "usb_errors.h"
#include "usb_request.h"
#include "usb_server_proxy.h"
#include "usb_srv_client.h"
const int32_t REQUESTYPE = ((1 << 7) | (0 << 5) | (0 & 0x1f));
const int32_t REQUESTCMD = 6;
const int32_t VALUE = (2 << 8) + 0;
const int32_t TIMEOUT = 5000;
const int32_t ITFCLASS = 10;
const int32_t PRAMATYPE = 2;
const int32_t BUFFERLENGTH = 21;
void GetType(OHOS::USB::USBEndpoint &tep, OHOS::USB::USBEndpoint &outEp, bool &outEpFlg)
{
if ((tep.GetType() == PRAMATYPE)) {
if (tep.GetDirection() == 0) {
outEp = tep;
outEpFlg = true;
}
}
}
bool SelectEndpoint(OHOS::USB::USBConfig config,
std::vector<OHOS::USB::UsbInterface> interfaces,
OHOS::USB::UsbInterface &interface,
OHOS::USB::USBEndpoint &outEp,
bool &outEpFlg)
{
for (int32_t i = 0; i < config.GetInterfaceCount(); ++i) {
OHOS::USB::UsbInterface tif = interfaces[i];
std::vector<OHOS::USB::USBEndpoint> mEndpoints = tif.GetEndpoints();
for (int32_t j = 0; j < tif.GetEndpointCount(); ++j) {
OHOS::USB::USBEndpoint tep = mEndpoints[j];
if ((tif.GetClass() == ITFCLASS) && (tif.GetSubClass() == 0) && (tif.GetProtocol() == PRAMATYPE)) {
GetType(tep, outEp, outEpFlg);
}
}
if (outEpFlg) {
interface = interfaces[i];
return true;
}
std::cout << std::endl;
}
return false;
}
int OpenDeviceTest(OHOS::USB::UsbSrvClient &Instran, OHOS::USB::UsbDevice device, OHOS::USB::USBDevicePipe &pip)
{
int ret = Instran.RequestRight(device.GetName());
std::cout << "device RequestRight ret = " << ret << std::endl;
if (0 != ret) {
std::cout << "device RequestRight failed = " << ret << std::endl;
}
ret = Instran.OpenDevice(device, pip);
return ret;
}
int CtrTransferTest(OHOS::USB::UsbSrvClient &Instran, OHOS::USB::USBDevicePipe &pip)
{
std::cout << "usb_device_test : << Control Transfer >> " << std::endl;
std::vector<uint8_t> vData;
const OHOS::USB::UsbCtrlTransfer tctrl = {REQUESTYPE, REQUESTCMD, VALUE, 0, TIMEOUT};
int ret = Instran.ControlTransfer(pip, tctrl, vData);
if (ret != 0) {
std::cout << "control message read failed width ret = " << ret << std::endl;
} else {
}
std::cout << "control message read success" << std::endl;
return ret;
}
int ClaimTest(OHOS::USB::UsbSrvClient &Instran,
OHOS::USB::USBDevicePipe &pip,
OHOS::USB::UsbInterface &interface,
bool interfaceFlg)
{
if (interfaceFlg) {
std::cout << "ClaimInterface InterfaceInfo:" << interface.ToString() << std::endl;
int ret = Instran.ClaimInterface(pip, interface, true);
if (ret != 0) {
std::cout << "ClaimInterface failed width ret = " << ret << std::endl;
} else {
std::cout << "ClaimInterface success" << std::endl;
}
}
return 0;
}
int BulkTransferTest(OHOS::USB::UsbSrvClient &Instran,
OHOS::USB::USBDevicePipe &pip,
OHOS::USB::USBEndpoint &outEp,
bool interfaceFlg,
bool outEpFlg)
{
if (interfaceFlg) {
std::cout << "usb_device_test : << Bulk transfer start >> " << std::endl;
if (outEpFlg) {
uint8_t buffer[50] = "hello world 123456789";
std::vector<uint8_t> vData(buffer, buffer + BUFFERLENGTH);
int ret = Instran.BulkTransfer(pip, outEp, vData, TIMEOUT);
if (ret != 0) {
std::cout << "Bulk transfer write failed width ret = " << ret << std::endl;
} else {
std::cout << "Bulk transfer write success" << std::endl;
}
return ret;
}
}
return 0;
}
int main(int argc, char **argv)
{
std::cout << "usb_device_test " << std::endl;
static OHOS::USB::UsbSrvClient &Instran = OHOS::USB::UsbSrvClient::GetInstance();
// GetDevices
std::vector<OHOS::USB::UsbDevice> deviceList;
int32_t ret = Instran.GetDevices(deviceList);
if (ret != 0) {
return OHOS::USB::UEC_SERVICE_INVALID_VALUE;
}
if (deviceList.empty()) {
return OHOS::USB::UEC_SERVICE_INVALID_VALUE;
}
OHOS::USB::UsbDevice device = deviceList[0];
std::vector<OHOS::USB::USBConfig> configs = device.GetConfigs();
OHOS::USB::USBConfig config = configs[0];
std::vector<OHOS::USB::UsbInterface> interfaces = config.GetInterfaces();
OHOS::USB::UsbInterface interface;
OHOS::USB::USBEndpoint outEp;
bool interfaceFlg = false;
bool outEpFlg = false;
interfaceFlg = SelectEndpoint(config, interfaces, interface, outEp, outEpFlg);
// OpenDevice
std::cout << "usb_device_test : << OpenDevice >> test begin -> " << std::endl;
OHOS::USB::USBDevicePipe pip;
ret = OpenDeviceTest(Instran, device, pip);
if (ret != 0) {
return OHOS::USB::UEC_SERVICE_INVALID_VALUE;
}
// ControlTransfer
CtrTransferTest(Instran, pip);
// ClaimInterface
ClaimTest(Instran, pip, interface, interfaceFlg);
// BulkTransferWrite
BulkTransferTest(Instran, pip, outEp, interfaceFlg, outEpFlg);
// CloseDevice
std::cout << "usb_device_test : << Close Device >> " << std::endl;
ret = Instran.Close(pip);
if (ret == 0) {
std::cout << "Close device failed width ret = " << ret << std::endl;
return OHOS::USB::UEC_SERVICE_INVALID_VALUE;
} else {
std::cout << "Close Device success" << std::endl;
}
return 0;
}
```
zh-cn/device-dev/subsystems/subsys-usbservice-guide.md 已删除 100644 → 0
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# USB服务子系统使用指导<a name="ZH-CN_TOPIC_0000001077367159"></a>
下面使用步骤以bulktransfer为例。
使用步骤<a name="section18816105182315"></a>
1. 获取usb service实例
```cpp
static OHOS::USB::UsbSrvClient &g_usbClient = OHOS::USB::UsbSrvClient::GetInstance();
```
2. 获取usb设备列表
```cpp
std::vector<OHOS::USB::UsbDevice> deviceList;
int32_t ret = g_usbClient.GetDevices(deviceList);
```
3. 申请设备权限
```cpp
int32_t ret = g_usbClient.RequestRight(device.GetName());
```
4. 打开设备
```cpp
USBDevicePipe pip;
int32_t et = g_usbClient.OpenDevice(device, pip);
```
5. 配置设备接口
```cpp
ret = g_usbClient.ClaimInterface(pip, interface, true); //interface为deviceList中device的interface。
```
6. 数据传输
```cpp
srvClient.BulkTransfer(pipe, endpoint, vdata, timeout);
```
pipe为打开设备后的数据传输通道，endpoint为device中数据传输的端点，vdata是需要传输或读取的二进制数据块，timeout为传输超时时长。
7. 关闭设备
```cpp
ret = g_usbClient.Close(pip);
```
zh-cn/device-dev/subsystems/subsys-usbservice-overview.md 已删除 100644 → 0
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# USB服务
## 概述
### 功能简介
USB设备分为Host设备（主机设备）和Device设备（从设备）。用户可通过Port Service来根据实际业务把运行OpenHarmony的设备切换为Host设备或者Device设备。目前在Host模式下，支持获取USB设备列表，USB设备权限管理，控制传输、批量传输的同异步数据传输等，在Device模式下，支持HDC（调试）、ACM（串口）、ECM（网口）等功能的切换。
### 基本概念
- USB服务
USB服务是应用访问底层的一种设备抽象概念。开发者根据提供的USB API，可以获取设备列表、控制设备访问权限、以及与连接的设备进行数据传输、控制命令传输等。
- USB API
基于USB Service服务，使用NAPI技术，向上提供JS接口。提供USB的基础API，主要包含查询USB设备的列表、设备插拔通知、USB HOST/DEVICE 功能切换、批量数据传输、控制命令传输、USB设备打开的权限控制及USB device模式下的function功能切换等。
- USB Service
使用C++代码实现，包含Host、Device、Port、Right四个模块。基于HDI接口，主要实现USB设备列表管理、Function 管理、Port管理、USB设备权限管理等功能。主要实现HAL层数据接收、解析、分发，前后台的策略管控，对该设备USB的管理，USB权限管控等。
- USB HAL
使用C代码实现，基于Host DDK(Driver Develop Kit)和Device DDK，封装了对USB设备的基本操作，向上提供C++接口，同时通过HDF框架接收内核上报的信息。
### 运作机制
USB服务系统包含USB API、USB Service、USB HAL。
**图1** USB服务架构图
![zh-cn_image_0000001267088285](figures/zh-cn_image_0000001267088285.png)
- USB API：提供USB的基础API，主要包含查询USB设备列表、批量数据传输、控制命令传输、权限控制等。
- USB Service：主要实现HAL层数据的接收、解析、分发，前后台的策略管控以及对设备的管理等。
- USB HAL层：提供给用户态可直接调用的驱动能力接口。
## 使用指导
### 场景介绍
Host模式下，可以获取到已经连接的设备列表，并根据需要打开和关闭设备、控制设备权限、进行数据传输等。
### 接口说明
**表1** Host部分
| 接口名称 | 功能描述 |
| ------------------------------------------------------------ | ------------------------------------------------------------ |
| int32_t OpenDevice(const UsbDevice &device, USBDevicePipe &pip); | 打开USB设备，建立连接 |
| bool HasRight(std::string deviceName); | 判断是否有权访问设备 |
| int32_t RequestRight(std::string deviceName); | 请求给定软件包的临时权限以访问设备 |
| int32_t GetDevices(std::vector &deviceList); | 获取USB设备列表 |
| int32_t ClaimInterface(USBDevicePipe &pip, const UsbInterface &interface, bool force); | 打开接口，并申明独占接口，必须在数据传输前执行 |
| int32_t ReleaseInterface(USBDevicePipe &pip, const UsbInterface &interface); | 关闭接口，释放接口的占用，在停止数据传输后执行 |
| int32_t BulkTransfer(USBDevicePipe &pip, const USBEndpoint &endpoint, std::vector &vdata, int32_t timeout); | 在给定端点上执行批量数据传输， 返回读取或发送的数据长度，通过端点方向确定读取或发送数据 |
| int32_t ControlTransfer(USBDevicePipe &pip, const UsbCtrlTransfer &ctrl, std::vector &vdata); | 对此设备执行端点零的控制事务，传输方向由请求类型决定 |
| int32_t SetConfiguration(USBDevicePipe &pip, const USBConfig &config); | 设置设备当前使用的配置，通过配置值进行指定 |
| int32_t SetInterface(USBDevicePipe &pipe, const UsbInterface &interface); | 设置指定接口的备选设置，用于在具有相同ID但不同备用设置的两个接口之间进行选择 |
| int32_t GetRawDescriptors(std::vector &vdata); | 获取原始的USB描述符 |
| int32_t GetFileDescriptor(); | 获取文件描述符 |
| bool Close(const USBDevicePipe &pip); | 关闭设备，释放与设备相关的所有系统资源 |
| int32_t PipeRequestWait(USBDevicePipe &pip, int64_t timeout, UsbRequest &req); | 获取异步传输结果 |
| int32_t RequestInitialize(UsbRequest &request); | 初始化异步数据传输request |
| int32_t RequestFree(UsbRequest &request); | 释放异步数据传输request |
| int32_t RequestAbort(UsbRequest &request); | 取消待处理的数据请求 |
| int32_t RequestQueue(UsbRequest &request); | 将指定的端点进行异步数据发送或者接收请求，数据传输方向由端点方向决定 |
| int32_t RegBulkCallback(USBDevicePipe &pip, const USBEndpoint &endpoint, const sptr<IRemoteObject> &cb); | 注册批量传输异步回调函数 |
| int32_t UnRegBulkCallback(USBDevicePipe &pip, const USBEndpoint &endpoint); | 注销批量传输异步回调函 |
| int32_t BulkRead(USBDevicePipe &pip, const USBEndpoint &endpoint, sptr<Ashmem> &ashmem); | 批量传输异步读数据 |
| int32_t BulkWrite(USBDevicePipe &pip, const USBEndpoint &endpoint, sptr<Ashmem> &ashmem); | 批量传输异步写 |
| int32_t BulkCancel(USBDevicePipe &pip, const USBEndpoint &endpoint); | 批量传输异步取消接口，用于取消当前接口的异步批量读写操作 |
**表2** Device部分
| 接口名称 | 功能描述 |
| -------------------------------------------------- | ------------------------------------------------------ |
| int32_t GetCurrentFunctions(int32_t &funcs); | 获取设备模式下的当前USB功能列表的数字组合掩码 |
| int32_t SetCurrentFunctions(int32_t funcs); | 在设备模式下设置当前的USB功能列表 |
| int32_t UsbFunctionsFromString(std::string funcs); | 将给定的功能列表描述字符串转换为功能列表的数字组合掩码 |
| std::string UsbFunctionsToString(int32_t funcs); | 将给定的功能列表的数字组合掩码转换为功能列表描述字符串 |
**表3** Port部分
| 接口名称 | 功能描述 |
| ------------------------------------------------------------ | -------------------------------------------------------- |
| int32_t GetSupportedModes(int32_t portId, int32_t &supportedModes); | 获取指定的端口支持的模式列表的组合掩码 |
| int32_t SetPortRole(int32_t portId, int32_t powerRole, int32_t dataRole); | 设置指定的端口支持的角色模式，包含充电角色、数据传输角色 |
| int32_t GetPorts(std::vector &usbPorts); | 获取物理USB端口描述信息列表 |
### USB服务子系统使用步骤
以bulktransfer为例。
1. 获取usb service实例。
```cpp
static OHOS::USB::UsbSrvClient &g_usbClient = OHOS::USB::UsbSrvClient::GetInstance();
```
2. 获取usb设备列表。
```cpp
std::vector<OHOS::USB::UsbDevice> deviceList;
int32_t ret = g_usbClient.GetDevices(deviceList);
```
3. 申请设备权限。
```cpp
int32_t ret = g_usbClient.RequestRight(device.GetName());
```
4. 打开设备。
```cpp
USBDevicePipe pip;
int32_t et = g_usbClient.OpenDevice(device, pip);
```
5. 配置设备接口。
```cpp
//interface为deviceList中device的interface。
ret = g_usbClient.ClaimInterface(pip, interface, true);
```
6. 数据传输。
```cpp
// pipe为打开设备后的数据传输通道，endpoint为device中数据传输的端点，vdata是需要传输或读取的二进制数据块，timeout为传输超时时长。
srvClient.BulkTransfer(pipe, endpoint, vdata, timeout);
```
7. 关闭设备。
```cpp
ret = g_usbClient.Close(pip);
```
### USB服务子系统使用实例
```cpp
#include <cstdio>
#include <iostream>
#include <map>
#include <mutex>
#include <sstream>
#include <sys/time.h>
#include "if_system_ability_manager.h"
#include "ipc_skeleton.h"
#include "iremote_object.h"
#include "iservice_registry.h"
#include "iusb_srv.h"
#include "string_ex.h"
#include "system_ability_definition.h"
#include "usb_common.h"
#include "usb_device.h"
#include "usb_errors.h"
#include "usb_request.h"
#include "usb_server_proxy.h"
#include "usb_srv_client.h"
const int32_t REQUESTYPE = ((1 << 7) | (0 << 5) | (0 & 0x1f));
const int32_t REQUESTCMD = 6;
const int32_t VALUE = (2 << 8) + 0;
const int32_t TIMEOUT = 5000;
const int32_t ITFCLASS = 10;
const int32_t PRAMATYPE = 2;
const int32_t BUFFERLENGTH = 21;
void GetType(OHOS::USB::USBEndpoint &tep, OHOS::USB::USBEndpoint &outEp, bool &outEpFlg)
{
if ((tep.GetType() == PRAMATYPE)) {
if (tep.GetDirection() == 0) {
outEp = tep;
outEpFlg = true;
}
}
}
bool SelectEndpoint(OHOS::USB::USBConfig config,
std::vector<OHOS::USB::UsbInterface> interfaces,
OHOS::USB::UsbInterface &interface,
OHOS::USB::USBEndpoint &outEp,
bool &outEpFlg)
{
for (int32_t i = 0; i < config.GetInterfaceCount(); ++i) {
OHOS::USB::UsbInterface tif = interfaces[i];
std::vector<OHOS::USB::USBEndpoint> mEndpoints = tif.GetEndpoints();
for (int32_t j = 0; j < tif.GetEndpointCount(); ++j) {
OHOS::USB::USBEndpoint tep = mEndpoints[j];
if ((tif.GetClass() == ITFCLASS) && (tif.GetSubClass() == 0) && (tif.GetProtocol() == PRAMATYPE)) {
GetType(tep, outEp, outEpFlg);
}
}
if (outEpFlg) {
interface = interfaces[i];
return true;
}
std::cout << std::endl;
}
return false;
}
int OpenDeviceTest(OHOS::USB::UsbSrvClient &Instran, OHOS::USB::UsbDevice device, OHOS::USB::USBDevicePipe &pip)
{
int ret = Instran.RequestRight(device.GetName());
std::cout << "device RequestRight ret = " << ret << std::endl;
if (0 != ret) {
std::cout << "device RequestRight failed = " << ret << std::endl;
}
ret = Instran.OpenDevice(device, pip);
return ret;
}
int CtrTransferTest(OHOS::USB::UsbSrvClient &Instran, OHOS::USB::USBDevicePipe &pip)
{
std::cout << "usb_device_test : << Control Transfer >> " << std::endl;
std::vector<uint8_t> vData;
const OHOS::USB::UsbCtrlTransfer tctrl = {REQUESTYPE, REQUESTCMD, VALUE, 0, TIMEOUT};
int ret = Instran.ControlTransfer(pip, tctrl, vData);
if (ret != 0) {
std::cout << "control message read failed width ret = " << ret << std::endl;
} else {
}
std::cout << "control message read success" << std::endl;
return ret;
}
int ClaimTest(OHOS::USB::UsbSrvClient &Instran,
OHOS::USB::USBDevicePipe &pip,
OHOS::USB::UsbInterface &interface,
bool interfaceFlg)
{
if (interfaceFlg) {
std::cout << "ClaimInterface InterfaceInfo:" << interface.ToString() << std::endl;
int ret = Instran.ClaimInterface(pip, interface, true);
if (ret != 0) {
std::cout << "ClaimInterface failed width ret = " << ret << std::endl;
} else {
std::cout << "ClaimInterface success" << std::endl;
}
}
return 0;
}
int BulkTransferTest(OHOS::USB::UsbSrvClient &Instran,
OHOS::USB::USBDevicePipe &pip,
OHOS::USB::USBEndpoint &outEp,
bool interfaceFlg,
bool outEpFlg)
{
if (interfaceFlg) {
std::cout << "usb_device_test : << Bulk transfer start >> " << std::endl;
if (outEpFlg) {
uint8_t buffer[50] = "hello world 123456789";
std::vector<uint8_t> vData(buffer, buffer + BUFFERLENGTH);
int ret = Instran.BulkTransfer(pip, outEp, vData, TIMEOUT);
if (ret != 0) {
std::cout << "Bulk transfer write failed width ret = " << ret << std::endl;
} else {
std::cout << "Bulk transfer write success" << std::endl;
}
return ret;
}
}
return 0;
}
int main(int argc, char **argv)
{
std::cout << "usb_device_test " << std::endl;
static OHOS::USB::UsbSrvClient &Instran = OHOS::USB::UsbSrvClient::GetInstance();
// GetDevices
std::vector<OHOS::USB::UsbDevice> deviceList;
int32_t ret = Instran.GetDevices(deviceList);
if (ret != 0) {
return OHOS::USB::UEC_SERVICE_INVALID_VALUE;
}
if (deviceList.empty()) {
return OHOS::USB::UEC_SERVICE_INVALID_VALUE;
}
OHOS::USB::UsbDevice device = deviceList[0];
std::vector<OHOS::USB::USBConfig> configs = device.GetConfigs();
OHOS::USB::USBConfig config = configs[0];
std::vector<OHOS::USB::UsbInterface> interfaces = config.GetInterfaces();
OHOS::USB::UsbInterface interface;
OHOS::USB::USBEndpoint outEp;
bool interfaceFlg = false;
bool outEpFlg = false;
interfaceFlg = SelectEndpoint(config, interfaces, interface, outEp, outEpFlg);
// OpenDevice
std::cout << "usb_device_test : << OpenDevice >> test begin -> " << std::endl;
OHOS::USB::USBDevicePipe pip;
ret = OpenDeviceTest(Instran, device, pip);
if (ret != 0) {
return OHOS::USB::UEC_SERVICE_INVALID_VALUE;
}
// ControlTransfer
CtrTransferTest(Instran, pip);
// ClaimInterface
ClaimTest(Instran, pip, interface, interfaceFlg);
// BulkTransferWrite
BulkTransferTest(Instran, pip, outEp, interfaceFlg, outEpFlg);
// CloseDevice
std::cout << "usb_device_test : << Close Device >> " << std::endl;
ret = Instran.Close(pip);
if (ret == 0) {
std::cout << "Close device failed width ret = " << ret << std::endl;
return OHOS::USB::UEC_SERVICE_INVALID_VALUE;
} else {
std::cout << "Close Device success" << std::endl;
}
return 0;
}
```
### 参考手册
[驱动子系统](https://gitee.com/openharmony/docs/blob/master/zh-cn/readme/%E9%A9%B1%E5%8A%A8%E5%AD%90%E7%B3%BB%E7%BB%9F.md)
[drivers\_peripheral](https://gitee.com/openharmony/drivers_peripheral/blob/master/README_zh.md)
[drivers\_framework](https://gitee.com/openharmony/drivers_framework/blob/master/README_zh.md)
[drivers\_adapter](https://gitee.com/openharmony/drivers_adapter/blob/master/README_zh.md)
[drivers\_adapter\_khdf\_linux](https://gitee.com/openharmony/drivers_adapter_khdf_linux/blob/master/README_zh.md)
\ No newline at end of file
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