ubuntu下使用dnw遇到的问题

以前在家用ubuntu9.10一直用的好好的，现在换成10.04，可dnw安以前得方法安转好后却不好使了！就是下载的时候提示failed！用dmesg显示：secbulk:usb_bulk_msg failed!莫名其妙的整了一上午终于找到下面这篇文章，按这个步骤重新安装了一遍dnw后终于好使了！！

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经历了多方周折，终于看到程序下载到了目标板上下面是具体步骤：

),首先要安装libusb-dev这个库。我是在Ubuntu
下做的。

那么就：sudo apt-get install libusb-dev

装完之后就编译一个下载工具，网上有个牛人提供了一个。代码如下：

/* dnw2 linux main file. This depends on libusb.

*

* Author: Fox <hulifox008@163.com>

* 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)

{

printf("idVendor:0x%x/t,ipProduct:0x%x/n",dev->descriptor.idVendor,dev->descriptor.idProduct);

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 = (unsigned char*)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;

}

2),把它保存为文件如：dnw2.c

接着编译: gcc dnw2.c -o dnw2 -lusb

3） 移动dnw2可执行文件到 /usr/bin下

sudo mv . / dnw2 / usr/ bin

4）

sudo dnw2 path/your_filename

干脆再生成的链接文件sudo ln -s ./dnw2 /usr/dnw2

这样在我们每编译完要下载的文件就可以直接下载了。