add html extra for webusb example

2021-08-05 14:06:08 +07:00
parent 2b521e0c10
commit b5d218e684
6 changed files with 323 additions and 1 deletions
@@ -0,0 +1,89 @@
+var serial = {};
+
+(function() {
+  'use strict';
+
+  serial.getPorts = function() {
+    return navigator.usb.getDevices().then(devices => {
+      return devices.map(device => new serial.Port(device));
+    });
+  };
+
+  serial.requestPort = function() {
+    const filters = [
+      { 'vendorId': 0x239A }, // Adafruit boards
+      { 'vendorId': 0xcafe }, // TinyUSB example
+    ];
+    return navigator.usb.requestDevice({ 'filters': filters }).then(
+      device => new serial.Port(device)
+    );
+  }
+
+  serial.Port = function(device) {
+    this.device_ = device;
+    this.interfaceNumber = 0;
+    this.endpointIn = 0;
+    this.endpointOut = 0;
+  };
+
+  serial.Port.prototype.connect = function() {
+    let readLoop = () => {
+      this.device_.transferIn(this.endpointIn, 64).then(result => {
+        this.onReceive(result.data);
+        readLoop();
+      }, error => {
+        this.onReceiveError(error);
+      });
+    };
+
+    return this.device_.open()
+        .then(() => {
+          if (this.device_.configuration === null) {
+            return this.device_.selectConfiguration(1);
+          }
+        })
+        .then(() => {
+          var interfaces = this.device_.configuration.interfaces;
+          interfaces.forEach(element => {
+            element.alternates.forEach(elementalt => {
+              if (elementalt.interfaceClass==0xFF) {
+                this.interfaceNumber = element.interfaceNumber;
+                elementalt.endpoints.forEach(elementendpoint => {
+                  if (elementendpoint.direction == "out") {
+                    this.endpointOut = elementendpoint.endpointNumber;
+                  }
+                  if (elementendpoint.direction=="in") {
+                    this.endpointIn =elementendpoint.endpointNumber;
+                  }
+                })
+              }
+            })
+          })
+        })
+        .then(() => this.device_.claimInterface(this.interfaceNumber))
+        .then(() => this.device_.selectAlternateInterface(this.interfaceNumber, 0))
+        .then(() => this.device_.controlTransferOut({
+            'requestType': 'class',
+            'recipient': 'interface',
+            'request': 0x22,
+            'value': 0x01,
+            'index': this.interfaceNumber}))
+        .then(() => {
+          readLoop();
+        });
+  };
+
+  serial.Port.prototype.disconnect = function() {
+    return this.device_.controlTransferOut({
+            'requestType': 'class',
+            'recipient': 'interface',
+            'request': 0x22,
+            'value': 0x00,
+            'index': this.interfaceNumber})
+        .then(() => this.device_.close());
+  };
+
+  serial.Port.prototype.send = function(data) {
+    return this.device_.transferOut(this.endpointOut, data);
+  };
+})();