I have changed my function so
void lcd_put_byte(unsigned int value, char clk, int reg)
{
unsigned int val2;
val2 = value<<8;
gpiosetbits(PORTG, val2 & 0xff00);
gpioclearbits(PORTG, (~val2) & 0xff00);
gpioclearbits(PORTG, PG1);
gpiosetbits(PORTG, PG3);
gpioclearbits(PORTG, PG3);
if (clk==1)
{
gpiosetbits(PORTG, PG3);
gpioclearbits(PORTG, PG3);
}
gpiosetbits(PORTG, PG1);
}
When I call the function I do such a thing
adr=(r-1)*240+(c-1);
byte=((adr >> 16) & 0x00000001);
banco=(banco << 1) & 0x03;
byte=byte | banco;
gpioclearbits(PORTG, PG16);
gpioclearbits(PORTG, PG17);
gpioclearbits(PORTG, PG18);
lcd_put_byte(byte,0,REG0);
With the old system everything was working slowly, but now the
dispatch of the data to the dislpay does not work
> > PG8-PG15
> >
> > --- In [email protected], John Crispin <john@> wrote:
> >>
> >> hi
> >>
> >> gpiosetbits(PORTG, (value << 8) & 0xffffff00);
> >> gpioclearbits(PORTG, (~value << 8) & 0xffffff00);
> >>
> >>
> >> although the & 0xffffff00 bit is not really needed, it is just for
> > sanity
> >>
> >> john
> >>
> >> > if (value&0x01)
> >> > gpiosetbits(PORTG, PG8);
> >> > else
> >> > gpioclearbits(PORTG, PG8);
> >> > if (value&0x02)
> >> > gpiosetbits(PORTG, PG9);
> >> > else
> >> > gpioclearbits(PORTG, PG9);
> >> > if (value&0x04)
> >> > gpiosetbits(PORTG, PG10);
> >> > else
> >> > gpioclearbits(PORTG, PG10);
> >> > if (value&0x08)
> >> > gpiosetbits(PORTG, PG11);
> >> > else
> >> > gpioclearbits(PORTG, PG11);
> >> > if (value&0x10)
> >> > gpiosetbits(PORTG, PG12);
> >> > else
> >> > gpioclearbits(PORTG, PG12);
> >> > if (value&0x20)
> >> > gpiosetbits(PORTG, PG13);
> >> > else
> >> > gpioclearbits(PORTG, PG13);
> >> > if (value&0x40)
> >> > gpiosetbits(PORTG, PG14);
> >> > else
> >> > gpioclearbits(PORTG, PG14);
> >> > if (value&0x80)
> >> > gpiosetbits(PORTG, PG15);
> >> > else
> >> > gpioclearbits(PORTG, PG15);
> >> > // cs e clk
> >> > gpioclearbits(PORTG, PG1);
> >> > gpiosetbits(PORTG, PG3);
> >> > gpioclearbits(PORTG, PG3);
> >> > if (clk==1)
> >> > {
> >> > gpiosetbits(PORTG, PG3);
> >> > gpioclearbits(PORTG, PG3);
> >> > }
> >> > gpiosetbits(PORTG, PG1);
> >> >
> >> > }
> >> > the problem and the slowness with which the byte is sent
because the
> >> > byte is sent bit per bit.
> >> > Does a way exist to send a whole byte?
> >> > I excuse but I do not speak English very well
> >> >
> >> >
> >>
> >
> >
> >
>
