linux 上的dnw程式

由於工作機是linux,每次要燒image都要切到windows不方便，

在網路上有找到別人寫的dnw程式，不過沒有作checksum的部份，就把他補上去了

ps.

1.系統需要先安裝libusb

2.使用時vid/pid可能需要依據裝置修改

/*

* cy add checksum

* use: gcc dnw2.c -o dnw2 -lusb -g

*/

/* dnw2 linux main file. This depends on libusb.

*

* Author: Fox

* License: GPL

*

*/

#include

#include

#include

#include

#include

#include

#define QQ2440_SECBULK_IDVENDOR 0x04e8

#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

{

int ret;

if(ret = usb_claim_interface(hdev, 0) != 0)

{

perror("Cannot claim interface");

printf("ret=%d\n", ret);

usb_close(hdev);

hdev = NULL;

}

}

return hdev;

}

}

}

printf("Target usb device not found!\n");

return NULL;

}

void usage()

{

printf("Usage: dnw2 \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 : %x bytes\n", (int)fs.st_size);

*((u_int32_t*)write_buf) = 0xC0000000; //download address

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

//cy: compute checksum

int k;

u_int16_t csum=0;

for(k=0; k<(int)fs.st_size; k++){

csum +=write_buf[8+k];

}

printf("CheckSum=%d\n",(int)csum);

write_buf[fs.st_size+ 8] = csum; //checksum;

write_buf[fs.st_size+ 9] = csum>>8; //checksum;

//printf("write_buf[%d]=%.2x\n", (int)fs.st_size + 8, write_buf[(int)fs.st_size + 8]);

//printf("write_buf[%d]=%.2x\n", (int)fs.st_size + 9, write_buf[(int)fs.st_size + 9]);

*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, 0x2, 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;

}