[En-Nut-Discussion] GPIO19 on Ethernut 3.0

[Ralf Spettel]

Hi Harald.
Yes, us too. We do our first steps with ARM and NUT3.0.
The first one was to activate our heartbeat LED. With:

#define CPLDBASEADDRESS 0x21000000L
#define LED_gr_ON       *((volatile u08 *)CPLDBASEADDRESS+0x18)=0x00
#define LED_gr_OFF      *((volatile u08 *)CPLDBASEADDRESS+0x18)=0x04

the onboard LED works fine..

and with the macro

#define LED1(p)
{\
outr(PIO_PER, _BV(16));\
outr(PIO_OER, _BV(16));\
if(p)\
         {\
                 outr(PIO_SODR, _BV(16));\
         }\
else\
         {\
                 outr(PIO_CODR, _BV(16));\
         }\
}

GPIO16 (18, 19)  should do the same...

We test it also with GPIO16 and GPIO18, with the same result...

The part of the heartbeat thread:

         // heartbeat led
         if (LEDstatus==1)
         {
                 LED_gr_ON;
                 LED1(1);
                 LEDstatus=0;
         }
         else
         {
                 LED_gr_OFF;
                 LED1(0);
                 LEDstatus=1;
         }
         NUTSleep(250);


With Oszi we get the following picture, the blue line ist the onbord LED 
and the yellow is GPIO16...

J5 are not chanced... placed like:

JP5 Jumper JP5 routes the JTAG signals
to the AT91R40008, if pins 1 and 2 and pins
5 and 6 are shortened.

Ralf


>Hard to believe...
>
>P19 is unused by default, but may be used to scan TDO
>of the CPLD via jumper JP5. Is JP5 set to default, as
>shown on page 5 of
>http://www.ethernut.de/pdf/ethwm30d.pdf
>
>Harald