ubuntu下dnw2工具的使用

转自：http://blog.chinaunix.net/uid-21228455-id-2406455.html  guocai_yao的博客

1. 安装libusb-dev库

$sudo apt-get install libusb-dev

2. dnw2源码

/* dnw2 linux main file. This depends on libusb.
 *
 * Author: Fox <[e-mail]>
 * License: GPL
 *
 */

#include <stdio.h>
#include <usb.h>
#include <errno.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>

#define QQ2440_SECBULK_IDVENDOR 0x5345
#define QQ2440_SECBULK_IDPRODUCT 0x1234


struct usb_dev_handle * open_port()
{
    struct usb_bus *busses,*bus;

    usb_init();
    usb_find_busses();
    usb_find_devices();

    busses = usb_get_busses();
    for(bus=busses;bus;bus=bus->next)
    {
         struct usb_device *dev;
        for(dev=bus->devices;dev;dev=dev->next)
        {
            if( QQ2440_SECBULK_IDVENDOR==dev->descriptor.idVendor
            && QQ2440_SECBULK_IDPRODUCT==dev->descriptor.idProduct)
            {
                printf("Target usb device found!\n");
                struct usb_dev_handle *hdev = usb_open(dev);
                if(!hdev)
                {
                    perror("Cannot open device");
                }
                else
                {
                    if(0!=usb_claim_interface(hdev, 0))
                    {
                        perror("Cannot claim interface");
                        usb_close(hdev);
                        hdev = NULL;
                    }
                }
                return hdev;
            }
        }
    }
   
    printf("Target usb device not found!\n");

    return NULL;
}

void usage()
{
    printf("Usage: dnw2 <file>\n\n");
}

unsigned char* prepare_write_buf(char*filename, unsigned int *len)
{
    unsigned char*write_buf = NULL;
    struct stat fs;

    int fd = open(filename, O_RDONLY);
    if(-1==fd)
    {
        perror("Cannot open file");
        return NULL;
    }
    if(-1==fstat(fd,&fs))
    {
        perror("Cannot get file size");
        goto error;
    }
    write_buf = (unsignedchar*)malloc(fs.st_size+10);
    if(NULL==write_buf)
    {
        perror("malloc failed");
        goto error;
    }

    if(fs.st_size!= read(fd, write_buf+8, fs.st_size))
    {
        perror("Reading file failed");
        goto error;
    }

    printf("Filename : %s\n", filename);
    printf("Filesize : %d bytes\n", fs.st_size);

    *((u_int32_t*)write_buf)= 0x30000000; //download address

    *((u_int32_t*)write_buf+1)= fs.st_size + 10; //download size;


    *len = fs.st_size+ 10;
    return write_buf;

error:
    if(fd!=-1)close(fd);
    if(NULL!=write_buf)free(write_buf);
    fs.st_size = 0;
    return NULL;
   
}

int main(int argc,char *argv[])
{
    if(2!=argc)
    {
        usage();
        return 1;
    }

    struct usb_dev_handle *hdev = open_port();
    if(!hdev)
    {
        return 1;
    }

    unsigned int len= 0;
    unsigned char* write_buf= prepare_write_buf(argv[1],&len);
    if(NULL==write_buf)return 1;

    unsigned int remain= len;
    unsigned int towrite;
    printf("Writing data ...\n");
    while(remain)
    {
        towrite = remain>512? 512 : remain;
        if(towrite!= usb_bulk_write(hdev, 0x03, write_buf+(len-remain), towrite, 3000))
        {
            perror("usb_bulk_write failed");
            break;
        }
        remain-=towrite;
        printf("\r%d%\t %d bytes ",(len-remain)*100/len, len-remain);
        fflush(stdout);
    }
    if(0==remain)printf("Done!\n");
    return 0;
}

3. 编译

gcc dnw2.c-o dnw2 -lusb

4. 移动dnw2可执行文件到 /usr/bin下

sudo mv./dnw2 /usr/bin

5. 使用
当开发板和PC机用usb连接线(B型，一头是方口，一头是标准usb口)后，使用命令

sudo dnw2 your_file

6. 参考资料
http://hi.baidu.com/z_live/blog/item/449713c609f021d0d0006057.html