linux下hid设备读写

#include <fcntl.h>
#include <unistd.h>
#include <stdio.h>

int main() {
    int fd = open("/dev/hidraw0", O_RDONLY);
    if (fd < 0) {
        perror("Unable to open device");
        return 1;
    }

    unsigned char buf[64];
    int res = read(fd, buf, sizeof(buf));
    if (res < 0) {
        perror("Unable to read");
        close(fd);
        return 1;
    }

    printf("Read %d bytes: ", res);
    for (int i = 0; i < res; i++) {
        printf("%02hhx ", buf[i]);
    }
    printf("
");

    close(fd);
    return 0;
}

#include <fcntl.h>
#include <unistd.h>
#include <stdio.h>

int main() {
    int fd = open("/dev/hidraw0", O_WRONLY);
    if (fd < 0) {
        perror("Unable to open device");
        return 1;
    }

    unsigned char buf[] = { /* your data here */ };
    int res = write(fd, buf, sizeof(buf));
    if (res < 0) {
        perror("Unable to write");
        close(fd);
        return 1;
    }

    printf("Wrote %d bytes
", res);
    close(fd);
    return 0;
}