Subversion Repositories csa

// this file implements some function to access image device

#include <usb.h>

#include <stdio.h>

#include "misc.h"

#define IMG_DEV_VID 0x0547

#define IMG_DEV_PID 0x1002

//#define IMG_DEV_VID 0x0a82 

//#define IMG_DEV_PID 0x0603

static usb_dev_handle* img_dev_handle=NULL;

int img_dev_open()

{

        struct usb_bus *bus;

        if(img_dev_handle)

                return -1;

        usb_set_debug(14);

        usb_init();

        usb_find_busses();

        usb_find_devices();

        for (bus = usb_get_busses(); bus; bus = bus->next)

        {

                struct usb_device *dev;

                for (dev = bus->devices; dev; dev = dev->next)

                {

                        if(      dev->descriptor.idVendor  == IMG_DEV_VID

                             &&  dev->descriptor.idProduct == IMG_DEV_PID )

                        {

                                        img_dev_handle = usb_open(dev);

                                        usb_set_configuration ( img_dev_handle, 1);

                                        usb_claim_interface   ( img_dev_handle, 0);

                                        usb_set_altinterface  ( img_dev_handle, 0);

                                        return 0;

                        }

                }

        }

        return -1;

}

void img_dev_close()

{

        if(img_dev_handle)

        {

                usb_close(img_dev_handle);

                img_dev_handle=NULL;

        }

}

int img_read_img(unsigned char* buf, int len)

{

        int i;

        if(!img_dev_handle)

                return -2;

        i=usb_bulk_read(img_dev_handle, 0x82, (char*)buf,  len, 200);

        if(i!=len)

                DEBUG_LINE("read data error");

        return i;

}

int img_write_data(unsigned char* buf, int len,int addr)

{

        int i;

        if(!img_dev_handle)

                return -2;

        if(addr != 0x08 && addr != 0x6 )

                return -3;

        i=usb_bulk_write(img_dev_handle, addr, (char*)buf,  len, 500);

        if(i!=len)

        {

                DEBUG_LINE("write data have some error i= %d",i);

                return -1;

        }

        return i;

}