Date: Fri, 26 Oct 2007 10:55:49 -0500 (CDT) From: Mark Tinguely <tinguely@casselton.net> To: achill@matrix.gatewaynet.com, tinguely@casselton.net Cc: freebsd-multimedia@freebsd.org Subject: Re: bktr and GPIO Message-ID: <200710261555.l9QFtnW6097987@casselton.net> In-Reply-To: <200710261827.25933.achill@matrix.gatewaynet.com>
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> In relation to bits assignments on LMLBT4M and LMLBT44 cards:
>
> /* to allow access to GPIO bits for sensors input and
> alarms output
>
> GPIObit | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
> assignment | TI | O3|INx| O2| O1|IN4|IN3|IN2|IN1| | |
>
> IN - sensor inputs, INx - sensor inputs and TI XORed together
> O1,O2,O3 - alarm outputs (relays)
>
> GPIO bits should be enabled for outpus as follows:
>
> OUT ENABLE 1 1 0 . 1 1 0 0 . 0 0 0 0 =3D 0x6C0
>
> */
In your user program after compiling/booting kernel with BKTR_GPIO_ACCESS,
all you should need to do is:
#define BKTR_ZONEMINDER_ALARM1 0x040
#define BKTR_ZONEMINDER_ALARM2 0x080
#define BKTR_ZONEMINDER_ALARM3 0x200
int value;
if (ioctl(tuner, BT848_GPIO_GET_EN, &value) < 0)
error();
value |= BKTR_ZONEMINDER_ALARM1; /* or other alarm */
if (ioctl(tuner, BT848_GPIO_SET_EN, &value) < 0)
error();
error()
{
perform some error routine and exit
}
--Mark Tinguely
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