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标题: ArkTS usbManager.bulkTransfer API 与设备通信失败,数据无法发送成功 [打印本页]

作者: young8 时间: 2024-3-7 18:58
标题: ArkTS usbManager.bulkTransfer API 与设备通信失败,数据无法发送成功
[md]执行usb.bulkTransfer 错误, 下面是日志打印错误,这是什么错误? 请大神给看看

![image.png](https://forums-obs.openharmony.c ... wxnunaao0xzevne.png "image.png")

附代码实现,

```ts
initCard() {
let devicesList: Array<usb.USBDevice> = usb.getDevices();
console.log(`devicesList = ${devicesList}`);
for (let index = 0; index < devicesList.length; index++) {
   const device = devicesList[index];
   if (device.vendorId == 1285) {
      let right: boolean = usb.hasRight(device.name);
      if (!right) {
      usb.requestRight(device.name).then((ret) => {
         if (ret) {
            this.initRfid(device)
         }
      });
      } else {
      this.initRfid(device)
      }
   }
}
  }
initRfid(device) {
usbDevicePipe = usb.connectDevice(device);
interfaces = device.configs[0].interfaces[0];
let ret1 = usb.releaseInterface(usbDevicePipe, interfaces);
let cret: number = usb.claimInterface(usbDevicePipe, interfaces, true);
if (cret != 0) {
   return
}
let outEndpoint: usb.USBEndpoint = interfaces.endpoints[0].direction == 0 ? interfaces.endpoints[0] : interfaces.endpoints[1];
let inEndpoint: usb.USBEndpoint = interfaces.endpoints[0].direction == 0 ? interfaces.endpoints[1] : interfaces.endpoints[0];

var arr = '117E550E00000100F400120100B7010032D8'
var buffer = new Uint8Array(arr.match(/[\da-f]{2}/gi).map(function (h) {
   return parseInt(h, 16)
}))
let param = {
   request: 0,
   reqType: 0,
   target: 0,
   value: 0,
   index: 0,
   data: new Uint8Array(18)
};
usb.bulkTransfer(usbDevicePipe, outEndpoint, buffer, 15000).then((ret: number) => {
   if (ret == -1) {
      prompt.showToast({
      message: "配置读写器失败！"
      });
   } else {
      prompt.showToast({
      message: "打开配置读写器成功！"
      });

   }
}).catch((error) => {
   console.info("usb writeData error : " + JSON.stringify(error));
});
  }
```
[/md]

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