Re: working LCD driver

alain2210_at_free.fr wrote:

>Hello,
>
>I reread the mail about the lcd. Andrew has written :
>
>
>
>>Also what I see from mq1178 register dump Koen sent me, h2200 doesn't
>>use any GPIO pins from MediaQ, so mq_base->set_GPIO statements should
>>not be used in h2200_lcd.c. On other hand, I think instead of MediaQ
>>GPIO1 on Axim on h2200 the GPIO_NR_H2200_LCD_POWER_ON PXA GPIO should be
>>used instead (if LCD_POWER doesn't mean here power to the MediaQ chip).
>>I would try first in HaRET to switch on/off GPIO67 and see what happens.
>>The command for this is "SET GPLR(67) 0 or 1".
>>
>>
>
>I have tried this. Of course the SET GPLR(67) 1 does nothing when the ipaq is on,
>but the SET GPLR(67) 0 just freeze the LCD on with the backlight on and the last
>image of haret, but the touchscreen does not answer anymore. Does it mean that it is
>the power of the MediaQ ?
>
>
>
GPIO67 is connected to the PDWN#/GPIO4 signal on the MQ1178. It does
not control power to the chip or the LCD but apparently puts the MQ1178
to sleep when set to 0. When the iPAQ goes to sleep, this signal should
be asserted (0) to save power.

Jamey
Received on Thu Feb 26 2004 - 20:03:44 EST