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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);
};
})();
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