Ubuntu 下配置 DNW 工具

最近在研究6410开发板的内核，我的虚拟机连接minicom总是有问题，于是就装了双系统。然后烧内核要使用三星的 DNW 工具，每次都要回到 Win7 下，很是麻烦，于是在网上搜了一下，终于找到了解决方法。

 

编译前先安装 libusb.

sudo apt-get install libusb-dev

代码如下

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

#define REAl6410_VENDOR_ID        0x04e8   //这是6410情况，2410要改为其他值
#define REAl6410_PRODUCT_ID       0x1234

#define REAl6410_RAM_BASE         0xc0008000 //这里根据烧写时的内存修改

// REAL6410
#define RAM_BASE            REAl6410_RAM_BASE
#define VENDOR_ID           REAl6410_VENDOR_ID
#define PRODUCT_ID          REAl6410_PRODUCT_ID

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( VENDOR_ID==dev->descriptor.idVendor
            &&  PRODUCT_ID==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;
    }
        unsigned short sum = 0;
        int i;
        for(i=8; i<fs.st_size+8; i++)
        {
                sum += write_buf[i];
        }
    printf("Filename : %s\n", filename);
    printf("Filesize : %d bytes\n", fs.st_size);
    printf ("Sum is %x\n",sum);

    *((u_int32_t*)write_buf) = RAM_BASE;        //download address
    *((u_int32_t*)write_buf+1) = fs.st_size + 10;    //download size;
    write_buf [fs.st_size + 8] = sum & 0xff;
    write_buf [fs.st_size + 9] = sum >> 8;
    *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, 0x02, 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;
}

 

将以上代码保存为 dnw2.c 文件，执行

gcc dnw2.c -o dnw2 -lusb

进行编译，得到名为 dnw2 的二进制文件。

将这个文件拷贝到 /bin 下，板子通电，进入 uboot，选择 Download zImage 选项，minicom中显示正在等待传输，这时就可以在另外一个终端中执行

sudo dnw2 <文件路径>

来下载文件了。

 

以上方法来自网络，但是当时找了很多很多资料，这一个记不得出处了，在这里对作者说下抱歉。