2012-08-10 10:27

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网上下载的开源dnw程序 ，在pc linux下用gcc编译即可。

$gcc dnw2.c -o dnw -lusb

注意事项:

中： 编译如果提示没有usb.h文件，说明你的pc linux系统没有安装usb开发包，apt-get install libusb-dev

英：if not exist usb.h, please install libusb-dev, i.e  apt-get install libusb-dev

dnw2.c的源码如下，这里需要说明：

1.  如果你的开发板连接pc后提示找不到设备，很可能是因为

QQ2440_SECBULK_IDVENDOR

QQ2440_SECBULK_IDPRODUCT

这两个宏定义跟固件内的定久不一致。 一可以修改开发板的usb download相关定义。二可以修改dnw2.c中的定义。

2.  在虚拟机下执行，发现USB写速度太慢。 我的优化办法是加大写缓存，也就是把宏BLOCK_SIZE的值调大。

速度提升非常明显

/*Linux main file. This depends on libusb.

*

* Author: Fox

* License: GPL

*

*/

#include

#include

#include

#include

#include

#include

#include

#define QQ2440_SECBULK_IDVENDOR 0x5345

#define QQ2440_SECBULK_IDPRODUCT 0x1234

#define DOWNLOAD_ADDR_DEFAULT 0x32000000

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("Usage1: dnw , Default Download Addr =0x%x\n", DOWNLOAD_ADDR_DEFAULT);

printf("Usage2: dnw \n\n");

}

int myatoi( char *str )

{

int data = 0;

int off = 0;

int len = 0;

int isnegative = 0;

int multi = 10;

int i = 0;

if( str == NULL || (len=strlen(str))==0)

{

return data;

}

if( len == 0 )

{

return 0;

}

if( str[off] == '-' )

{

isnegative = 1;

off++;

len--;

}

if( len == 0 )

{

return 0;

}

//16进制

if( len > 2 && str[off] == '0' && (str[off+1] == 'x' || str[off+1] == 'X') )

{

multi = 16;

off += 2;

}

//2进制

else  if( len > 2 && str[off] == '0' && (str[off+1] == 'b' || str[off+1] == 'B') )

{

multi = 2;

off += 2;

}

//8进制

else if( str[off] == '0' )

{

multi = 8;

off += 1;

}

//10进制

else

{

multi = 10;

}

if( multi == 16 )

{

for( i = 0; ; i++ )

{

if( str[i+off] >= '0' && str[i+off] <= '9' )

{

data = (data<<4) + (str[i+off]-'0');

}

else if( str[i+off] >= 'a' && str[i+off] <= 'z' )

{

data = (data<<4) + (str[i+off]-'a');

}

else if( str[i+off] >= 'A' && str[i+off] <= 'Z' )

{

data = (data<<4) + (str[i+off]-'A');

}

else

{

break;

}

}

}

else if( multi == 10 )

{

for( i = 0; ; i++ )

{

if( str[i+off] >= '0' && str[i+off] <= '9' )

{

data = (data*10) + (str[i+off]-'0');

}

else

{

break;

}

}

}

else if( multi == 8 )

{

for( i = 0; ; i++ )

{

if( str[i+off] >= '0' && str[i+off] <= '7' )

{

data = (data<<3) + (str[i+off]-'0');

}

else

{

break;

}

}

}

else if (multi == 2 )

{

for( i = 0; ; i++ )

{

if( str[i+off] == '0' || str[i+off] == '1' )

{

data = (data<<1) + (str[i+off]-'0');

}

else

{

break;

}

}

}

else

{

return 0;

}

if( isnegative )

{

data *= -1;

}

return data;

}

unsigned char* prepare_write_buf(unsigned int addr, char *filename, unsigned int *len)

{

unsigned char *write_buf = NULL;

struct stat fs;

unsigned int i;

unsigned short checksum = 0;

unsigned char *pChar = NULL;

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", (int)fs.st_size);

*((u_int32_t*)write_buf) = addr; //download address

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

printf("StartAddr:0x%x\n",*((u_int32_t*)write_buf));

printf("Size:0x%x\n",*((u_int32_t*)write_buf+1));

pChar = write_buf+8;

for( i = 0; i < fs.st_size; i++ )

{

checksum += *pChar++;

}

printf("CheckSum:0x%x\n",checksum);

pChar = write_buf + 8 + fs.st_size;

pChar[0]= (unsigned char)(checksum&0xff);

pChar[1]= (unsigned char)((checksum>>8)&0xff);

*len = fs.st_size + 10;

close(fd);

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[])

{

unsigned int downloadaddr = DOWNLOAD_ADDR_DEFAULT;

char *filename = NULL;

if( 2 == argc )

{

filename = argv[1];

}

else if( 3 == argc )

{

downloadaddr = myatoi(argv[1]);

filename = argv[2];

}

else

{

usage();

return -1;

}

if( downloadaddr == 0 || filename == NULL )

{

printf("Bad Param!!!\n");

//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(downloadaddr, filename, &len);

if (NULL==write_buf )

{

return 1;

}

unsigned int remain = len;

unsigned int towrite;

printf("Writing data ...\n");

while(remain)

{

#define BLOCK_SIZE 81920

towrite = remain > BLOCK_SIZE ? BLOCK_SIZE : remain;

if(towrite != usb_bulk_write(hdev, 0x02, write_buf+(len-remain), towrite, 30000))

{

perror("usb_bulk_write failed");

break;

}

remain -= towrite;

printf("\r%d%%\t %dK Bytes ", ((len-remain)*10)/(len/10), (len-remain)>>12);

fflush(stdout);

}

if( 0== remain )

{

printf("Done!\n");

}

if( NULL != write_buf )

{

free(write_buf);

}

return 0;

}