基于上面的节点，用C语言实现文本文件数据的接收和发送

以下是基于Zynq-7000系列芯片USB 3.0驱动和节点，使用C语言实现文本文件数据的接收和发送的示例：

1. 实现USB 3.0数据传输函数
使用libusb库来实现USB 3.0数据传输函数，包括连接USB设备、读取和写入数据等操作。以下是示例代码：

#include <stdio.h>
#include <libusb-1.0/libusb.h>

#define VENDOR_ID 0xXXXX
#define PRODUCT_ID 0xXXXX

libusb_device_handle *dev_handle;

void connect_usb_device() {
    libusb_init(NULL);
    dev_handle = libusb_open_device_with_vid_pid(NULL, VENDOR_ID, PRODUCT_ID);
    if (dev_handle == NULL) {
        printf("Failed to connect USB device.\n");
        return;
    }
    printf("USB device connected.\n");
}

void disconnect_usb_device() {
    libusb_close(dev_handle);
    libusb_exit(NULL);
    printf("USB device disconnected.\n");
}

void read_file(char *filename) {
    FILE *file = fopen(filename, "r");
    if (file == NULL) {
        printf("Failed to open file.\n");
        return;
    }
    char buffer[1024];
    int bytes_read;
    while ((bytes_read = fread(buffer, 1, sizeof(buffer), file)) > 0) {
        int bytes_written;
        libusb_bulk_transfer(dev_handle, 0x81, buffer, bytes_read, &bytes_written, 0);
    }
    fclose(file);
    printf("File sent.\n");
}

void write_file(char *filename) {
    FILE *file = fopen(filename, "w");
    if (file == NULL) {
        printf("Failed to create file.\n");
        return;
    }
    char buffer[1024];
    int bytes_read, total_bytes_written = 0;
    while (1) {
        int bytes_written;
        libusb_bulk_transfer(dev_handle, 0x01, buffer, sizeof(buffer), &bytes_read, 0);
        if (bytes_read == 0) {
            break;
        }
        int bytes_written = fwrite(buffer, 1, bytes_read, file);
        total_bytes_written += bytes_written;
    }
    fclose(file);
    printf("Received file saved (%d bytes).\n", total_bytes_written);
}

2. 调用USB 3.0数据传输函数
在主函数中调用上述USB 3.0数据传输函数，实现文本文件的接收和发送。以下是示例代码：

int main(int argc, char **argv) {
    if (argc < 3) {
        printf("Usage: %s <send|receive> <filename>\n", argv[0]);
        return 0;
    }
    if (strcmp(argv[1], "send") == 0) {
        connect_usb_device();
        read_file(argv[2]);
        disconnect_usb_device();
    } else if (strcmp(argv[1], "receive") == 0) {
        connect_usb_device();
        write_file(argv[2]);
        disconnect_usb_device();
    } else {
        printf("Invalid command.\n");
        return 0;
    }
    return 0;
}

在命令行中执行以下命令，即可实现文本文件的发送和接收：

./usb_file_transfer send file.txt
./usb_file_transfer receive file.txt

其中，第一个命令将文本文件file.txt发送到连接的USB设备中，第二个命令将从USB设备接收文件，并保存为file.txt。