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Linux下DNW源码及安装

Linux下DNW源码及安装

1.首先要安装libusb-dev这个库,执行“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:
    CODE:
    /*
    * dnw.c 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(void)
    {
    printf(“Usage: dnw <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dnw.c,编译“gcc dnw2.c -o dnw -lusb”,编译完得到的dnw就是usb下载的PC端了。下载时用“dnw <filename>”下载文件到板上。也可生成的链接文件“sudo ln -s ./dnw /usr/sbin/dnw”,这样在编译完要下载文件就可以直接下载了。
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