Dear Jens Scharsig,
In message 4AE946E7.4050404@bus-elektronik.de you wrote:
If I understand you correctly now? The train goes in the opposite direction.
in the AT91RM9200.h
a port is defined as
typedef struct _AT91S_PIO { ... AT91_REG PIO_OER; /* Output Enable Register */ ... } AT91S_PIO, *AT91PS_PIO;
This is close. Of course we should drop the AT91_REG and use standard types instead, and "PIO_OER" is not a logal variable name either because it's all-capitals. So this entry should rather look like this:
... u32 pio_oer; ...
and
#define AT91C_BASE_PIOC ((AT91PS_PIO) 0xFFFFF800)
This is definitely deprecated.
So the access should be
AT91PS_PIO pioa = AT91C_BASE_PIOA; ... writel(AT91C_PA23_TXD2, &pioa->PIO_OER);
Yes, except for the incorrect variable name.
or
writel(AT91C_PA23_TXD2, &AT91C_BASE_PIOA->PIO_OER);
No.
I'm right?
Mostly :-)
Thanks!
Best regards,
Wolfgang Denk