[ts-7000] Re: Ts- 7260 LCD Power

["slkiri88" <>]

Here is the code that I am using... It works for turning the LCD 
power off but I am not able to turn it back on unless i reboot.. any 
help on this will help.. 

thanks

Here is the code that I have


#define PADR    0

volatile unsigned int *pheader;


power = (unsigned int *)mmap(0, getpagesize(), 
      PROT_READ|PROT_WRITE, MAP_SHARED, fd, POWERBASE);

pheader = &power[PADR];


void lcdPowerOff(void) { 
    unsigned char temp = *pheader;
    unsigned char temp2;
    printf("Value before power off %d",temp);
    temp2 = *pheader & 0xfb;
    *pheader = temp2;
    printf("Value after powering off %d",temp2); 

}

void lcdPowerOn(void) {
    unsigned char temp = *pheader;
    printf("Value before power on %d",temp);
    *pheader = 0x0f;
    unsigned char temp2 = *pheader;
    printf("Value after powering on %d",temp2); 
}












--- In  "kendwyer" <> wrote:
>
> Hi,
> 
> If you are not using peek8 etc and are using C code to access the
> power management register make sure you use 8bit read and write 
accesses. 
> 
> For example:
> 
> ....
> .......
> 
> unsigned char *dat, *start;
> unsigned char *PSREGc;
> 
> int fd1 = open("/dev/mem", O_RDWR);
> start = mmap(0, getpagesize(), PROT_READ|PROT_WRITE, MAP_SHARED,fd1,
> 0x12000000);
> dat = start; // read the register at addr
> printf("Power Saving Register read data = 0x%x\n",*dat);
> 
> PSREGc = start;
>  
> *PSREGc = 0x09 ; // write to Power Saving Register, turn off USB and
> LCD 5V supply
> dat = start; // read the Power Saving Register
> printf("Power Saving Register read data = 0x%x\n",*dat);
> 
> *PSREGc = 0x0f ; // write to Power Saving Register, turn on USB and
> LCD 5V supply
> dat = start; // read the Power Saving Register
> printf("Power Saving Register read data = 0x%x\n",*dat);
> 
> close(fd1);
> 
> ....
> .....
> 
> 
> Ken
> 
> 
> --- In  Eddie Dawydiuk <eddie@> wrote:
> >
> > Hello,
> > 
> > > My problem I am trying to use the power management option on 
the LCD's
> > > I tried following the data sheet. The problem I am encountering 
is
> that
> > > the LCD powers of, but it doesn't power on when its set to do 
so. when
> > > you change bit 2 of the register to 0 all other bits change to 
zero as
> > > well.
> > 
> > I'm unable to reproduce this, could you post some code 
demonstrating
> > this?
> > 
> > e.g.
> > 
> >   $ peek8 0x12000000
> >   0x7
> >   $ poke8 0x12000000 0x3
> >   $ peek8 0x12000000
> >   0x3
> >   $ poke8 0x12000000 0x7
> >   $ peek8 0x12000000
> >   0x7
> >   $
> > 
> > //Eddie
> >
>




 
Yahoo! Groups Links

<*> To visit your group on the web, go to:
    http://groups.yahoo.com/group/ts-7000/

<*> Your email settings:
    Individual Email | Traditional

<*> To change settings online go to:
    http://groups.yahoo.com/group/ts-7000/join
    (Yahoo! ID required)

<*> To change settings via email:
     
    

<*> To unsubscribe from this group, send an email to:
    

<*> Your use of Yahoo! Groups is subject to:
    http://docs.yahoo.com/info/terms/