由多个应用程序控制的UWP gpio
我的问题很简单。我有带win10的RPI和多个UWP应用程序。我想在任何应用程序出现问题(抛出异常或其他)时打开红色led,并在问题解决时将其关闭 我可以从应用程序上拉上/下引脚,但当一个应用程序持有GPIO引脚时,另一个应用程序将抛出异常。或者,当一个应用程序中的问题得到解决时,当其他应用程序仍有问题时,led将熄灭 有没有我可以使用的抽象概念,或者我可以创建自己的抽象概念由多个应用程序控制的UWP gpio,uwp,gpio,windows-iot-core-10,Uwp,Gpio,Windows Iot Core 10,我的问题很简单。我有带win10的RPI和多个UWP应用程序。我想在任何应用程序出现问题(抛出异常或其他)时打开红色led,并在问题解决时将其关闭 我可以从应用程序上拉上/下引脚,但当一个应用程序持有GPIO引脚时,另一个应用程序将抛出异常。或者,当一个应用程序中的问题得到解决时,当其他应用程序仍有问题时,led将熄灭 有没有我可以使用的抽象概念,或者我可以创建自己的抽象概念 *抽象是指在后台工作的应用程序,我可以将其称为静态类。GPIO控制器不能跨多个应用程序域共享,一旦某个应用程序处理GPI
*抽象是指在后台工作的应用程序,我可以将其称为静态类。GPIO控制器不能跨多个应用程序域共享,一旦某个应用程序处理GPIO控制器,它将被锁定到当前应用程序域。我认为解决这个问题的一个办法是,你可以创建一个作为设备上运行的网桥,应用程序服务控制GPIO,你的多个应用程序调用服务。您可以在应用程序服务中实现该逻辑 更新: windows iot核心后台应用程序中没有托管应用程序服务 StartupTask.cs
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Net.Http;
using Windows.ApplicationModel.Background;
using Windows.ApplicationModel.AppService;
using Windows.Foundation.Collections;
using Windows.Devices.Gpio;
using System.Threading.Tasks;
using Windows.System.Threading;
// The Background Application template is documented at http://go.microsoft.com/fwlink/?LinkID=533884&clcid=0x409
namespace AppErrorCrossDomainMonitorService
{
public sealed class AppErrorCrossDomainMonitorTask : IBackgroundTask
{
IBackgroundTaskInstance _taskInstance = null;
private BackgroundTaskDeferral serviceDeferral;
private AppServiceConnection connection;
private GpioController gpioController;
private static GpioPin ledPin = null;
private GpioOpenStatus pinStatus = GpioOpenStatus.UnknownError;
private const int LED_PIN = 4;
public void Run(IBackgroundTaskInstance taskInstance)
{
//
// TODO: Insert code to perform background work
//
// If you start any asynchronous methods here, prevent the task
// from closing prematurely by using BackgroundTaskDeferral as
// described in http://aka.ms/backgroundtaskdeferral
//
//Take a service deferral so the service isn't terminated
try
{
serviceDeferral = taskInstance.GetDeferral();
taskInstance.Canceled += OnTaskCanceled;
_taskInstance = taskInstance;
pinStatus = GpioOpenStatus.UnknownError;
gpioController = GpioController.GetDefault();
var details = taskInstance.TriggerDetails as AppServiceTriggerDetails;
if(details != null)
{
connection = details.AppServiceConnection;
//Listen for incoming app service requests
connection.RequestReceived += OnRequestReceived;
}
}
catch(Exception ex)
{
System.Diagnostics.Debug.WriteLine(ex.Message);
}
}
private void OnTaskCanceled(IBackgroundTaskInstance sender, BackgroundTaskCancellationReason reason)
{
if (serviceDeferral != null)
{
//Complete the service deferral
serviceDeferral.Complete();
serviceDeferral = null;
}
if (connection != null)
{
connection.Dispose();
connection = null;
}
}
async void OnRequestReceived(AppServiceConnection sender, AppServiceRequestReceivedEventArgs args)
{
//Get a deferral so we can use an awaitable API to respond to the message
var messageDeferral = args.GetDeferral();
try
{
var input = args.Request.Message;
string appName = input["AppName"].ToString();
string actionName = input["ActionName"].ToString();
//Create the response
var result = new ValueSet();
if (gpioController != null)
{
if(ledPin == null)
{
gpioController.TryOpenPin(LED_PIN, GpioSharingMode.Exclusive, out ledPin, out pinStatus);
if (ledPin != null)
{
ledPin.SetDriveMode(GpioPinDriveMode.Output);
}
}
}
if (actionName == "error")
{
//Open LED
ledPin.Write(GpioPinValue.High);
result.Add("led-status", "ON");
}
if (actionName == "clear")
{
//Close LED
ledPin.Write(GpioPinValue.Low);
result.Add("led-status", "OFF");
}
//Send the response
await args.Request.SendResponseAsync(result);
}
catch(Exception ex)
{
System.Diagnostics.Debug.WriteLine(ex.Message);
}
finally
{
//Complete the message deferral so the platform knows we're done responding
messageDeferral.Complete();
}
}
}
}
Package.appxmanifest
<Package
xmlns="http://schemas.microsoft.com/appx/manifest/foundation/windows10"
xmlns:mp="http://schemas.microsoft.com/appx/2014/phone/manifest"
xmlns:uap="http://schemas.microsoft.com/appx/manifest/uap/windows10"
xmlns:iot="http://schemas.microsoft.com/appx/manifest/iot/windows10"
xmlns:uap3="http://schemas.microsoft.com/appx/manifest/uap/windows10/3"
IgnorableNamespaces="uap mp iot uap3">
...
<Extensions>
<Extension Category="windows.backgroundTasks" EntryPoint="AppErrorCrossDomainMonitorService.AppErrorCrossDomainMonitorTask">
<BackgroundTasks>
<iot:Task Type="startup" />
</BackgroundTasks>
</Extension>
<uap:Extension Category="windows.appService" EntryPoint="AppErrorCrossDomainMonitorService.AppErrorCrossDomainMonitorTask">
<uap3:AppService Name="com.microsoft.errorcrossdomainmonitor" SupportsRemoteSystems="true"/>
</uap:Extension>
</Extensions>
...
<Capabilities>
<Capability Name="internetClient" />
<DeviceCapability Name="lowLevel" />
</Capabilities>
</Package>
...
...
您需要在程序包清单中添加应用程序服务的扩展引用。无法在多个应用程序域中共享GPIO控制器,一旦某个应用程序处理GPIO控制器,它将针对当前应用程序域被锁定。我认为解决这个问题的一个办法是,你可以创建一个作为设备上运行的网桥,应用程序服务控制GPIO,你的多个应用程序调用服务。您可以在应用程序服务中实现该逻辑 更新: windows iot核心后台应用程序中没有托管应用程序服务 StartupTask.cs
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Net.Http;
using Windows.ApplicationModel.Background;
using Windows.ApplicationModel.AppService;
using Windows.Foundation.Collections;
using Windows.Devices.Gpio;
using System.Threading.Tasks;
using Windows.System.Threading;
// The Background Application template is documented at http://go.microsoft.com/fwlink/?LinkID=533884&clcid=0x409
namespace AppErrorCrossDomainMonitorService
{
public sealed class AppErrorCrossDomainMonitorTask : IBackgroundTask
{
IBackgroundTaskInstance _taskInstance = null;
private BackgroundTaskDeferral serviceDeferral;
private AppServiceConnection connection;
private GpioController gpioController;
private static GpioPin ledPin = null;
private GpioOpenStatus pinStatus = GpioOpenStatus.UnknownError;
private const int LED_PIN = 4;
public void Run(IBackgroundTaskInstance taskInstance)
{
//
// TODO: Insert code to perform background work
//
// If you start any asynchronous methods here, prevent the task
// from closing prematurely by using BackgroundTaskDeferral as
// described in http://aka.ms/backgroundtaskdeferral
//
//Take a service deferral so the service isn't terminated
try
{
serviceDeferral = taskInstance.GetDeferral();
taskInstance.Canceled += OnTaskCanceled;
_taskInstance = taskInstance;
pinStatus = GpioOpenStatus.UnknownError;
gpioController = GpioController.GetDefault();
var details = taskInstance.TriggerDetails as AppServiceTriggerDetails;
if(details != null)
{
connection = details.AppServiceConnection;
//Listen for incoming app service requests
connection.RequestReceived += OnRequestReceived;
}
}
catch(Exception ex)
{
System.Diagnostics.Debug.WriteLine(ex.Message);
}
}
private void OnTaskCanceled(IBackgroundTaskInstance sender, BackgroundTaskCancellationReason reason)
{
if (serviceDeferral != null)
{
//Complete the service deferral
serviceDeferral.Complete();
serviceDeferral = null;
}
if (connection != null)
{
connection.Dispose();
connection = null;
}
}
async void OnRequestReceived(AppServiceConnection sender, AppServiceRequestReceivedEventArgs args)
{
//Get a deferral so we can use an awaitable API to respond to the message
var messageDeferral = args.GetDeferral();
try
{
var input = args.Request.Message;
string appName = input["AppName"].ToString();
string actionName = input["ActionName"].ToString();
//Create the response
var result = new ValueSet();
if (gpioController != null)
{
if(ledPin == null)
{
gpioController.TryOpenPin(LED_PIN, GpioSharingMode.Exclusive, out ledPin, out pinStatus);
if (ledPin != null)
{
ledPin.SetDriveMode(GpioPinDriveMode.Output);
}
}
}
if (actionName == "error")
{
//Open LED
ledPin.Write(GpioPinValue.High);
result.Add("led-status", "ON");
}
if (actionName == "clear")
{
//Close LED
ledPin.Write(GpioPinValue.Low);
result.Add("led-status", "OFF");
}
//Send the response
await args.Request.SendResponseAsync(result);
}
catch(Exception ex)
{
System.Diagnostics.Debug.WriteLine(ex.Message);
}
finally
{
//Complete the message deferral so the platform knows we're done responding
messageDeferral.Complete();
}
}
}
}
Package.appxmanifest
<Package
xmlns="http://schemas.microsoft.com/appx/manifest/foundation/windows10"
xmlns:mp="http://schemas.microsoft.com/appx/2014/phone/manifest"
xmlns:uap="http://schemas.microsoft.com/appx/manifest/uap/windows10"
xmlns:iot="http://schemas.microsoft.com/appx/manifest/iot/windows10"
xmlns:uap3="http://schemas.microsoft.com/appx/manifest/uap/windows10/3"
IgnorableNamespaces="uap mp iot uap3">
...
<Extensions>
<Extension Category="windows.backgroundTasks" EntryPoint="AppErrorCrossDomainMonitorService.AppErrorCrossDomainMonitorTask">
<BackgroundTasks>
<iot:Task Type="startup" />
</BackgroundTasks>
</Extension>
<uap:Extension Category="windows.appService" EntryPoint="AppErrorCrossDomainMonitorService.AppErrorCrossDomainMonitorTask">
<uap3:AppService Name="com.microsoft.errorcrossdomainmonitor" SupportsRemoteSystems="true"/>
</uap:Extension>
</Extensions>
...
<Capabilities>
<Capability Name="internetClient" />
<DeviceCapability Name="lowLevel" />
</Capabilities>
</Package>
...
...
您需要在程序包清单中添加应用程序服务的扩展引用。是否可以将一个应用程序服务附加到多个应用程序?不是一个服务的多个实例,每个应用一个吗?@110mat110,是的,可以将一个应用服务附加到多个应用。应用程序服务是一项后台任务,用于允许跨应用程序共享数据和功能。您还有其他示例吗?我尝试过microsoft示例,每个应用程序都会创建自己的应用程序服务。@110mat110,我更新了我的响应并提供了一个示例,您可以参考这个示例。omg,我喜欢您的答案。我不知道。我可以同时创建后台启动任务和appservice。微软的示例真的让人困惑。谢谢是否可以将一个应用程序服务附加到多个应用程序?不是一个服务的多个实例,每个应用一个吗?@110mat110,是的,可以将一个应用服务附加到多个应用。应用程序服务是一项后台任务,用于允许跨应用程序共享数据和功能。您还有其他示例吗?我尝试过microsoft示例,每个应用程序都会创建自己的应用程序服务。@110mat110,我更新了我的响应并提供了一个示例,您可以参考这个示例。omg,我喜欢您的答案。我不知道。我可以同时创建后台启动任务和appservice。微软的示例真的让人困惑。谢谢