谁能提供一个读USB的类？

1万 · 2019-11-15 22:24

这几天老做一些底层的东西，API又不熟，谁能提供一个读USB的类？

1万 · 2019-11-15 22:26

明天买本API的书看看吧。。不想学都不行。。

1万 · 2019-11-15 22:30

你哪本书是C#操作USB口的吗？

2万 · 2019-11-15 22:33

用C#操作比较麻烦吧？

1万 · 2019-11-15 22:38

没有现成的读USB口的例子吗?

1万 · 2019-11-15 22:40

自己找个现成的库文件，调用就行了。

1万 · 2019-11-15 22:47

USB这东西哟，感觉底层简单，上层协议复杂程度可以和TCPIP相比了

1万 · 2019-11-15 22:51

最好找个实例看看，CY的芯片都会有相应的API手册。

1万 · 2019-11-15 22:54

唉，还是没有什么结果，算了，先结贴吧，多谢大家啦

只看该作者 · 2024-1-17 16:28

cpp
#include <windows.h>
#include <winusb.h>

class USBReader
{
private:
HANDLE deviceHandle;
WINUSB_INTERFACE_HANDLE winusbHandle;
ULONG bufferSize;
PUCHAR buffer;
ULONG transferSize;

public:
USBReader(const char* devicePath)
{
      // Open a handle to the USB device.
      deviceHandle = CreateFile(devicePath, GENERIC_READ | GENERIC_WRITE, 0, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
      if (deviceHandle == INVALID_HANDLE_VALUE) {
         printf("Error: Unable to open USB device handle.\n");
         return;
      }

      // Claim the interface to get a WinUSB handle.
      DWORD interfaceNumber = 0; // The interface number to open.
      DWORD alternateSetting = 0; // The alternate setting of the interface to open.
      DWORD deviceHandleSize = sizeof(deviceHandle);
      if (!WinUsb_ClaimInterface(deviceHandle, &interfaceNumber, &winusbHandle)) {
         printf("Error: Unable to claim USB interface.\n");
         CloseHandle(deviceHandle);
         return;
      }

      // Allocate a buffer for receiving data from the USB device.
      bufferSize = 64 * 1024; // The size of the buffer to allocate. Adjust this based on your needs.
      buffer = (PUCHAR)malloc(bufferSize);
      if (!buffer) {
         printf("Error: Unable to allocate memory for the USB buffer.\n");
         WinUsb_Free(winusbHandle);
         CloseHandle(deviceHandle);
         return;
      }
}

~USBReader()
{
      free(buffer);
      WinUsb_Free(winusbHandle);
      CloseHandle(deviceHandle);
}

bool ReadData()
{
      // Set up the transfer parameters. Adjust these based on your needs.
      ULONG transferLength = 0; // The length of the data to transfer. Adjust this based on your needs.
      ULONG transferOffset = 0; // The offset at which to start reading data from the device. Adjust this based on your needs.
      if (!WinUsb_ReadPacket(winusbHandle, transferOffset, buffer, transferLength, &transferSize, 0)) { // Read the data from the device. Adjust this based on your needs.
         printf("Error: Unable to read data from the USB device.\n");
         return false;
      } else {
         // Do something with the data that was read from the USB device. This might involve printing it or storing it in a file. Adjust this based on your needs.
         printf("Read %d bytes of data from the USB device.\n", transferSize); // Print the number of bytes that were read. Adjust this based on your needs.
         return true; // Return true if the data was read successfully, false otherwise. Adjust this based on your needs.
      }
}
};