RE: [Bluez-devel] Corrections in hciattach code

[Marcel Holtmann <marcel@holtmann.org>]

Hi Jatin,

> Here it is...
> 
> --- hciattach_old.c	2005-12-06 13:15:22.000000000 -0800
> +++ hciattach.c	2005-12-06 13:16:15.000000000 -0800
> @@ -688,7 +688,7 @@
>  	}
>  
>  	/* Send initialization command */
> -	if (write(fd, cmd, 9) != 9) {
> +	if (write(fd, cmd, 10) != 10) {
>  		perror("Failed to write init command");
>  		return -1;
>  	}

this part is clear.

> @@ -720,15 +720,15 @@
>  		return -1;
>  	}
>  
> -	// we probably got the reply. Now we must send the "soft reset":
> +	// we probably got the reply. Now we must send the "soft reset":
> which
> +	// is standard HCI RESET.
>  	cmd[0] = HCI_COMMAND_PKT;	// it's a command packet
> -	cmd[1] = 0x0B;			// OCF 0x0B	= param access
> set	
> -	cmd[2] = 0xfc;			// OGF bx111111 = vendor
> specific
> -	cmd[3] = 0x01;			// 1 byte of data following 
> -	cmd[4] = 0x03;			// HCI Reset Subcommand
> +	cmd[1] = 0x03;				
> +	cmd[2] = 0x0c;		
> +	cmd[3] = 0x00;		
>  			
> -	// Send initialization command
> -	if (write(fd, cmd, 5) != 5) {
> +	// Send HCI RESET command
> +	if (write(fd, cmd, 4) != 4) {
>  		perror("Can't write Silicon Wave reset cmd.");
>  		return -1;
>  	}

But with this one I am not sure. Do this chip really uses HCI Reset to
reset the device and bring it up with the new baud rate. Actually my
understanding is that HCI Reset should not reset the transport layer and
this has been clarified in the Bluetooth 1.1 specification.

Regards

Marcel
 



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