QQ2440开发板在Ubuntu下下载内核

在位的好友的指导下，我的Ubuntu终于能通过USB下载东西了！在这里说一下步骤，方便自己也希望对大家有好处！

一、下载usb驱动： apt-get  install libusb-dev

二、编译DNW2，gcc -o dnw2 -lusb

呵呵，DNW2就会在当前目录下生成！

文件下载：

./dnw2 file

code:

#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 = (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;
}

本代码从网上下载，别恶意!