Subject: Re: [PATCH] Fix function keys sequence on USB

From: Nikunj A Dadhania <[email-masked]>
Date: Tue, 02 Jun 2015 15:17:53 +0530

Dinar valeev <[email-masked]> writes:

> From: Dinar Valeev <[email-masked]>
>
> Original issue is home and end keys are not functional in grub2.
> Later I've found other inconsistencies in f1-f12 keys.
>
> "Correct sequence" was crabbed by pressing key on cat running in
> xterm.
>
> Tested with Home, End, F2, Del and F10 keys in grub2
>
> Signed-off-by: Dinar Valeev <[email-masked]>
> ---
>  lib/libusb/usb-hid.c | 40 +++++++++++++++++-----------------------
>  1 file changed, 17 insertions(+), 23 deletions(-)
>
> diff --git a/lib/libusb/usb-hid.c b/lib/libusb/usb-hid.c
> index f0cab8a..ccd5ba9 100644
> --- a/lib/libusb/usb-hid.c
> +++ b/lib/libusb/usb-hid.c
> @@ -190,33 +190,29 @@ static void check_key_code(uint8_t *buf)
>  				case 0x3a:	                        /* F1 */
>  					write_key(0x1b);
>  					write_key(0x5b);
> -					write_key(0x31);
> -					write_key(0x31);
> -					write_key(0x7e);
> +					write_key(0x4f);
> +					write_key(0x50);
>  					break;
>  
>  				case 0x3b:		                /* F2 */
>  					write_key(0x1b);
>  					write_key(0x5b);
> -					write_key(0x31);
> -					write_key(0x32);
> -					write_key(0x7e);
> +					write_key(0x4f);
> +					write_key(0x51);
>  					break;

Tested fine.

>  
>  				case 0x3c:
>  					write_key(0x1b);               /* F3 */
>  					write_key(0x5b);
> -					write_key(0x31);
> -					write_key(0x33);
> -					write_key(0x7e);
> +					write_key(0x4f);
> +					write_key(0x52);
>  					break;
>  
>  				case 0x3d:
>  					write_key(0x1b);		/* F4 */
>  					write_key(0x5b);
> -					write_key(0x31);
> -					write_key(0x34);
> -					write_key(0x7e);
> +					write_key(0x4f);
> +					write_key(0x53);
>  					break;
>  
>  				case 0x3e:
> @@ -254,7 +250,7 @@ static void check_key_code(uint8_t *buf)
>  				case 0x42:
>  					write_key(0x1b);		/* F9 */
>  					write_key(0x5b);
> -					write_key(0x31);
> +					write_key(0x32);
>  					write_key(0x30);
>  					write_key(0x7e);
>  					break;
> @@ -262,7 +258,7 @@ static void check_key_code(uint8_t *buf)
>  				case 0x43:
>  					write_key(0x1b);	       /* F10 */
>  					write_key(0x5b);
> -					write_key(0x31);
> +					write_key(0x32);
>  					write_key(0x31);
>  					write_key(0x7e);
>  					break;

Does F10 work for you? doesn't work for me ?

> @@ -270,7 +266,7 @@ static void check_key_code(uint8_t *buf)
>  				case 0x44:
>  					write_key(0x1b);	       /* F11 */
>  					write_key(0x5b);
> -					write_key(0x31);
> +					write_key(0x32);
>  					write_key(0x33);
>  					write_key(0x7e);
>  					break;
> @@ -278,7 +274,7 @@ static void check_key_code(uint8_t *buf)
>  				case 0x45:
>  					write_key(0x1b);	       /* F12 */
>  					write_key(0x5b);
> -					write_key(0x31);
> +					write_key(0x32);
>  					write_key(0x34);
>  					write_key(0x7e);
>  					break;
> @@ -290,36 +286,34 @@ static void check_key_code(uint8_t *buf)
>  				case 0x49:
>  					write_key(0x1b);	       /* INS */
>  					write_key(0x5b);
> -					write_key(0x31);
> +					write_key(0x32);
>  					write_key(0x7e);
>  					break;
>  
>  				case 0x4a:
>  					write_key(0x1b);	      /* HOME */
>  					write_key(0x5b);
> -					write_key(0x32);
> -					write_key(0x7e);
> +					write_key(0x48);

Looking at accept.fs - handle-ESC-5b ...

: handle-ESC-5b
   key
   dup 31 = IF \ HOME
      key drop ( drops closing 7e ) handle-^A
   ELSE
      dup 33 = IF \ DEL
         key drop handle-^D
      ELSE
         dup 34 = IF \ END
            key drop handle-^E
         ELSE
            dup 1f and handle-CSI
         THEN
      THEN
   THEN drop
;

... following change is sufficient:
-					write_key(0x32);
+					write_key(0x31);

>  					break;
>  
>  				case 0x4b:
>  					write_key(0x1b);	      /* PgUp */
>  					write_key(0x5b);
> -					write_key(0x33);
> +					write_key(0x35);
>  					write_key(0x7e);
>  					break;
>  
>  				case 0x4c:
>  					write_key(0x1b);	       /* DEL */
>  					write_key(0x5b);
> -					write_key(0x34);
> +					write_key(0x33);

Right.

>  					write_key(0x7e);
>  					break;
>  
>  				case 0x4d:
>  					write_key(0x1b);	       /* END */
>  					write_key(0x5b);
> -					write_key(0x35);
> -					write_key(0x7e);
> +					write_key(0x46);

I tried using: 0x34, but somehow it does not work.

Regards
Nikunj