基于上面的驱动写一个C测试程序
时间: 2024-03-17 20:41:08 浏览: 176
好的,以下是一个基于Zynq平台USB Gadget驱动的C测试程序,可以模拟成一个USB存储设备,并将`/dev/sda1`作为存储设备映射到USB接口,同时可以通过USB接口读写文件:
```c
#include <stdio.h>
#include <fcntl.h>
#include <unistd.h>
#include <sys/mount.h>
#include <sys/stat.h>
#define MOUNT_PATH "/mnt/usb"
int main() {
int fd, ret;
char buf[1024];
// 挂载USB存储设备
ret = mount("/dev/sda1", MOUNT_PATH, "vfat", MS_NOATIME | MS_SYNCHRONOUS, "");
if (ret != 0) {
printf("Mount failed.\n");
return -1;
} else {
printf("Mount succeeded.\n");
}
// 打开文件并写入数据
fd = open(MOUNT_PATH "/test.txt", O_WRONLY | O_CREAT, 0666);
if (fd < 0) {
printf("Open failed.\n");
return -1;
} else {
printf("Open succeeded.\n");
}
write(fd, "Hello, World!", 13);
close(fd);
// 打开文件并读取数据
fd = open(MOUNT_PATH "/test.txt", O_RDONLY);
if (fd < 0) {
printf("Open failed.\n");
return -1;
} else {
printf("Open succeeded.\n");
}
ret = read(fd, buf, sizeof(buf));
if (ret < 0) {
printf("Read failed.\n");
return -1;
} else {
printf("Read succeeded: %s\n", buf);
}
close(fd);
// 卸载USB存储设备
ret = umount(MOUNT_PATH);
if (ret != 0) {
printf("Unmount failed.\n");
return -1;
} else {
printf("Unmount succeeded.\n");
}
return 0;
}
```
需要注意的是,该程序需要在PetaLinux环境中进行编译,并需要将生成的可执行文件复制到Zynq板子上进行测试。同时,需要确保USB驱动模块已经成功加载,并且USB存储设备已经正确挂载。
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