S3C6410使用---12Linux下的dnw

以前在tq2440上有linux下的dnw,不用装驱动一个ELF文件就可以执行下载.
把以前的代码拿过来修改了一下,发现还是不错的,呵呵,这下烧的时候不用插拔SD卡了! (附件中有编译好的dnw)
dusb.c

/* dnw2 linux main file. This depends on libusb.
 *
 * Author: Fox <[e-mail]>
 * License: GPL
 * dusb.c
 */

#include <stdio.h>
#include <usb.h>
#include <errno.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#if 1
#define QQ2440_SECBULK_IDVENDOR        0x04e8
#define QQ2440_SECBULK_IDPRODUCT    0x1234
#else
#define QQ2440_SECBULK_IDVENDOR        0x1234
#define QQ2440_SECBULK_IDPRODUCT    0x04e8
#endif
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%xt,ipProduct:0x%xn",
                    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 nn");
}

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 : %sn", filename);
    printf("Filesize : 0x%x bytesn", (int)fs.st_size);

    *((u_int32_t*) write_buf) = 0x30000000;              //download address:这个值写啥无所谓
    *((u_int32_t*) write_buf + 1) = fs.st_size + 10;     //download size;

    //USB format : addr(4)+size(4)+data(n)+cs(2)
     // 主要是添加了下面这部分内容: 生成checksum值,并写到write_buf中
    //如果重新编译的u-boot去掉了 #ifdef USB_CHECKSUM_EN,那么下面这个可以不加
    int i;
    unsigned short checkSum = 0;

    unsigned char* cs_start = write_buf+8;
    unsigned char* cs_end = write_buf+8+fs.st_size;
    while(cs_start < cs_end) {
        checkSum += *cs_start++;
    }
    printf("checkSum=0x%xn", checkSum);

    *(unsigned short*)(write_buf+fs.st_size+8) = checkSum;

    *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;
        //端点与TQ2440不一样是个二
        //if (towrite != usb_bulk_write(hdev, 0x03, write_buf + (len - remain), towrite, 3000)) {
        if (towrite != usb_bulk_write(hdev, 0x02, write_buf + (len - remain), towrite, 3000)) {
            perror("usb_bulk_write failed");
            break;
        }
        remain -= towrite;
        printf("r%dt %d bytes     ", (len-remain)*100/len, len-remain);
        fflush(stdout);
    }
    if (0 == remain)
        printf("Done!n");
    return 0;
}

Makefile:

dusb:dusb.c
    gcc -g -o $@ $< -lusb
clean:
    rm -rf ./*.o dusb

如果提示找不到头文件,
fatal error: usb.h: No such file or directory
这可能是libusb库没有安装

sudo apt-get install libusb-dev

附件是编译好的dnw与源码
dusb_ok6410.rar