[Libusb-devel] usb_bulk_read() failed

[Carlos J M. <car...@in...>]

Hi All,

I am new about programming for USB. I am trying to  start a communication with a Sony Ericsson mobile
phone.

I have got success return from usb_bulk_write() , but not from  usb_bulk_read().

Could anyone help me ?  Any information is important.



I am sending my output from usbview and a piece of code.



usbview output: =========================================

Sony Ericsson V800-Vodafone 802SE
Manufacturer: Sony Ericsson
Serial Number: 004601015057343_0
Speed: 12Mb/s (full)
USB Version:  2.00
Device Class: 02(comm.)
Device Subclass: 00
Device Protocol: 00
Maximum Default Endpoint Size: 64
Number of Configurations: 1
Vendor Id: 0fce
Product Id: d008
Revision Number:  0.00

	Interface Number: 2
		Name: (none)
		Alternate Number: 0
		Class: 0a(data ) 
		Sub Class: 0
		Protocol: 0
		Number of Endpoints: 2

			Endpoint Address: 02
			Direction: out
			Attribute: 2
			Type: Bulk
			Max Packet Size: 64
			Interval: 0ms

			Endpoint Address: 82
			Direction: in
			Attribute: 2
			Type: Bulk
			Max Packet Size: 64
			Interval: 0ms

my code : ==============================================================================


#define   END_POINT_IN   0x02
#define   END_POINT_OUT  0x82

/* this is a Obex setpath message */
unsigned char buffer[] = {
0x80, 0x00, 0x1a, 0x10, 0x00, 0x02, 0x00, 0x46, 0x00,0x13, 0xf9, 0xec, 0x7b, 0xc4, 
0x95 , 0x3c, 0x11, 0xd2, 0x98, 0x4e, 0x52, 0x54, 0x00, 0xdc, 0x9e, 0x09
};

unsigned char rec[128];



       if ( (usbHandle = usb_open( dev ) ) )
        {
           int ret;
           
	   ret = usb_set_configuration(  usbHandle, 1  );
	   
	   ret = usb_claim_interface( usbHandle, 2  ); 
          if ( ret < 0 )
          {
           printf("\n\nusb_claim_interface ERROR:\n\n\n");
           return;
          }
	   	   	   
	   ret = usb_bulk_write(usbHandle, END_POINT_OUT, "\r\r\rATZ\r" , 7, 5000 );	   
	   sleep(1);
	   ret = usb_bulk_read(usbHandle,  END_POINT_IN, rec, 3, 5000);
	   
	   ret = usb_bulk_write(usbHandle, END_POINT_OUT, "AT+CBC\r" , 7, 5000 );	    
	   sleep(1);
	   ret = usb_bulk_read(usbHandle,  END_POINT_IN, rec, 3, 5000);
	   	      
	   ret = usb_bulk_write(usbHandle, END_POINT_OUT, buffer, 26, 5000);
	   
	   ret = usb_bulk_read(usbHandle,  END_POINT_IN, rec, 3, 5000);
	   
	    



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 car...@in...
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