[En-Nut-Discussion] Olimex SAM9-L9260 board

[Lars Tore Skau]

Hello again..

forgot to mention that you need to enable the peripheral clock!

try to add(before your for loop):
outr(PMC_PCER, _BV(PIOC_ID)); //enable peripheral clock

that said, if you really want to read button presses to perform actions, you
should try the pio level change interrupt, or use a timer to scan the
buttons..


- Lars Tore


On Tue, Jun 10, 2008 at 1:18 PM, af_80 <a_funk80 at yahoo.de> wrote:

>
> I doesn' works. Here is the complete code for this example:
> #include <compiler.h>
> #include <cfg/os.h>
> #include <stdio.h>
> #include <io.h>
> #include <dev/board.h>
> #include <sys/thread.h>
> #include <sys/timer.h>
> #include <sys/event.h>
> #include <dev/twif.h>
> #include <dev/irqreg.h>
>
> void Led1Off(void)
> {
>    outr(PIOA_OER, _BV(6));
>    outr(PIOA_SODR, _BV(6));
>    NutSleep(500);
> }
>
> void Led1On(void)
> {
>    outr(PIOA_OER, _BV(6));
>    outr(PIOA_CODR, _BV(6));
>    NutSleep(500);
> }
>
> int main(void)
> {
>    u_long baud = 115200;
>
>    NutRegisterDevice(&DEV_DEBUG, 0, 0);
>    freopen(DEV_DEBUG_NAME, "w", stdout);
>    _ioctl(_fileno(stdout), UART_SETSPEED, &baud);
>
>    printf("\nNut/OS Version: %s", NutVersionString());
>    printf("\nCPU running at %lu MHz", NutGetCpuClock()/1000000);
>    printf("\nProgram loaded...\n");
>
>    outr(PIOC_PER, _BV(15)); //enable pio control
>    outr(PIOC_ODR, _BV(15)); //set pin as input
>
>    for(;;)
>    {
>        if((inr(PIOC_PDSR) & _BV(15)) ? 1 : 0)
>        {
>                 Led1Off();
>        }
>        else
>        {
>                puts("\n Button pressed");
>        }
>
>       Led1On();
>       Led1Off();
>    }
> }
>
>
> The LED's are blinking all the time but the reading from pin produce no
> action.  I tried thes sample also with ext-header connector on port_pin
> pb22
> also not successful :(
>
> I don't know about this problem, maybe Ethernut requires that peripheral
> should be explicit disabled before using of gpio ?
> --
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> Nabble.com.
>
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