HarmonyOS 鸿蒙Next USB控制传输(usb.controlTransfer方式)

安卓的USB控制传输：
val length = it.controlTransfer(64, 6, 0, 0, command.rawData, command.rawData.size, 4000)
EDLog.i(“USB 写入数据：${length}”)
var readLength = it.controlTransfer(192, 12, 0, 0, readBuffer, readBuffer.size, 500)
EDLog.i(“USB 读取数据：${readLength}”)

python的USB控制传输：
print(f"发送指令：{buffer}")
assert self.dev.ctrl_transfer(bmRequestType=64, bRequest=6, wValue=0, wIndex=0,
data_or_wLength=buffer) == len(
buffer)
ret = self.dev.ctrl_transfer(bmRequestType=192, bRequest=12, wValue=0, wIndex=0,
data_or_wLength=64)
print(f"接收指令：{ret}")
 

鸿蒙的控制传输：

public controlTransfer(device: usb.USBDevice, buffer: Uint8Array): void {

  // 打开设备，获取数据传输通道。
  let pipe : usb.USBDevicePipe = usb.connectDevice(device);

  let sendBuffer: Uint8Array = buffer
  let readBuffer: Uint8Array = new Uint8Array(this.maxLength)

  let sendParam: PARA = {
    request: 6, reqType: 64, target:0, value: 0, index: 0, data: sendBuffer
  };

  let readParam: PARA = {
    request: 12, reqType: 192, target:0, value: 0, index: 0, data: readBuffer
  };

  // 发送指令
  usb.controlTransfer(pipe, sendParam, 4000).then((dataLength : number) => {
  if (dataLength >= 0) {
      console.info("usb writeData result write length : " + dataLength);
    } else {
      console.info(“writeData failed”);
    }
  }).catch((error : BusinessError) => {
    console.info("usb writeData error : " + JSON.stringify(error));
  });

  // 接收指令
  usb.controlTransfer(pipe, readParam, 500).then((dataLength : number) => {
    if (dataLength >= 0) {
      console.info("usb readData result write length : " + dataLength);
    } else {
      console.info(“readData failed”);
    }
  }).catch((error : BusinessError) => {
    console.info("usb readData error : " + JSON.stringify(error));
  });
}