[libhid-discuss] Still can't interrupt_read() properly

[amruth]

Hi
Maria
The issue may be that interrupt is not getting clear The USB state is not getting cleared. Please try using usb_clear_halt and it should work.  

Thanks
Amruth p.v


--- On Fri, 9/5/08, Marian Aldenhövel <marian.aldenhoevel at mba-software.de> wrote:

> From: Marian Aldenhövel <marian.aldenhoevel at mba-software.de>
> Subject: Re: [libhid-discuss] Still can't interrupt_read() properly
> To: "libhid-discuss List" <libhid-discuss at lists.alioth.debian.org>
> Date: Friday, September 5, 2008, 8:18 AM
> Hi,
> 
> I have reproduced the problem in a simple testcase based on
> libhid_test.c to 
> make sure that it was not something unrelated in the rest
> of my read program.
> 
> The attached simple program sends the same command three
> times. The device 
> acts on it three times, but the results do not come back
> the second and third 
> time. The second and third attempts fail with different
> results.
> 
> Ciao, MM
> -- 
> Marian Aldenhövel, Rosenhain 23, 53123 Bonn
> http://www.marian-aldenhoevel.de
> "I ran some quick calculations on it. He's about
> 80% on the right
>   track.  That leaves him only 20% dead when he
> crashes." Bob C
> #include <hid.h>
> #include <stdio.h>
> #include <string.h>
> #include <unistd.h> /* for getopt() */
> 
> int main()
> {
>   HIDInterface* hid;
>   int iface_num = 0;
>   hid_return ret;
> 
>   unsigned short vendor_id  = 0x0590;
>   unsigned short product_id = 0x0034;
> 
>   HIDInterfaceMatcher matcher = { vendor_id, product_id,
> NULL, NULL, 0 };
> 
>   /* see include/debug.h for possible values */
>   hid_set_debug(HID_DEBUG_ALL);
>   hid_set_debug_stream(stderr);
> 
>   /* passed directly to libusb */
>   hid_set_usb_debug(1);
> 
>   ret = hid_init();
>   if (ret != HID_RET_SUCCESS) {
>     fprintf(stderr, "hid_init failed with return code
> %d\n", ret);
>     return 1;
>   }
> 
>   hid = hid_new_HIDInterface();
>   if (hid == 0) {
>     fprintf(stderr, "hid_new_HIDInterface() failed,
> out of memory?\n");
>     return 1;
>   }
> 
>   ret = hid_force_open(hid, iface_num, &matcher, 3);
>   if (ret != HID_RET_SUCCESS) {
>     fprintf(stderr, "hid_force_open failed with return
> code %d\n", ret);
>     return 1;
>   }
> 
>   ret = hid_write_identification(stdout, hid);
>   if (ret != HID_RET_SUCCESS) {
>     fprintf(stderr, "hid_write_identification failed
> with return code %d\n", ret);
>     return 1;
>   }
> 
>   ret = hid_dump_tree(stdout, hid);
>   if (ret != HID_RET_SUCCESS) {
>     fprintf(stderr, "hid_dump_tree failed with return
> code %d\n", ret);
>     return 1;
>   }
> 
>   int sendloop;
>   for (sendloop = 0 ; sendloop < 3 ; sendloop++) {
>   	unsigned char const SEND_PACKET_LEN = 11;
>   	char const PACKET[11] = { 0x02, 0x00, 0x03, 0x43, 0x30,
> 0x30, 0x00, 0x00, 0x00, 0x00, 0x00 };
> 
>   	const int PATHLEN=3;
>   	const int PATH_IN[3] = { 0xff000001, 0xff000021,
> 0xff000121 };
> 
>   	ret = hid_set_output_report(hid, PATH_IN, PATHLEN,
> PACKET, SEND_PACKET_LEN);
>   	if (ret != HID_RET_SUCCESS) {
>   		fprintf(stderr, "hid_set_output_report failed with
> return code %d\n", ret);
>   	}
> 
>   	const int size = 11;
>   	char buffer[11];
>   	ret = hid_interrupt_read(hid,0x81,buffer,size,1000);
>   	if (ret != HID_RET_SUCCESS) {
> 		  fprintf(stderr, "hid_get_input_report failed with
> return code %d\n", ret);
>   	}
> 
> 	fprintf(stderr, "reply is
> [%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d]\n",
> 	       
> buffer[0],buffer[1],buffer[2],buffer[3],buffer[4],buffer[5],
> 	       
> buffer[6],buffer[7],buffer[8],buffer[9],buffer[10]);
> 
>   }
> 
>   ret = hid_close(hid);
>   if (ret != HID_RET_SUCCESS) {
>     fprintf(stderr, "hid_close failed with return code
> %d\n", ret);
>     return 1;
>   }
> 
>   hid_delete_HIDInterface(&hid);
> 
>   ret = hid_cleanup();
>   if (ret != HID_RET_SUCCESS) {
>     fprintf(stderr, "hid_cleanup failed with return
> code %d\n", ret);
>     return 1;
>   }
> 
>   return 0;
> }
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