Hi,
with an AT91SAM7L, I use PIOA, PIOB and PIOC.
I can configure and set/clear pins of PIOC and I have action on electrical lines.
I also configure and set/clear pins of PIOA and PIOB but I have no action on electrical lines !!
my code :
int main(void)
{
const Pin pins[] = {
{1 << 8, AT91C_BASE_PIOA, AT91C_ID_PIOA, PIO_OUTPUT_0, PIO_DEFAULT},
{1 << 0, AT91C_BASE_PIOC, AT91C_ID_PIOC, PIO_OUTPUT_0, PIO_DEFAULT}
};
// Configure pins
PIO_Configure( pins, PIO_LISTSIZE(pins) );
// pins ouput
AT91C_BASE_PIOA->PIO_OWER = AT91C_PIO_PA8;
AT91C_BASE_PIOC->PIO_OWER = AT91C_PIO_PC0;
// PIN_DBGU_ENcfg à 0
AT91C_BASE_PIOA->PIO_ODSR ^= AT91C_PIO_PA8; // nothing
AT91C_BASE_PIOC->PIO_ODSR ^= AT91C_PIO_PC0; // ok
...
Have I forgotten something ?
Please have an idea ;)

>>Have I forgotten something ? Please have an idea ;)

The peripheral clocks, or the pin power supplies?

I tried to begin with
PMC_EnablePeripheral( AT91C_ID_PIOA );
PMC_EnablePeripheral( AT91C_ID_PIOC );
without success.
What do you mean with "pin power supplies" ? there is no controler to modify pin power ?

Assume I know nothing about your board or how you have it wired, beyond what you have described in your post.

VDDIO1 Powers PIOC
VDDIO2 Powers PIOA and PIOB

I don't use LCD, so Charge Pump and LCD Regulator are not used. My hardware correspond to figure 5-5 of AT91SAM7L128 datasheet
VDDIO1 and VDDIO2 are tied together to 3.0 V
VDDOUT and VDDCORE are tied together
VDDLCD to 3.0 V, VDDINLCD to GND
TST is tied to GND
ERASE to GND and can be pull up to 3.0 V by strap
FWUP to GND
CLKIN to GND
JTAGSEL to GND
NRST to JTAG-RESET
TDI, TDO to JTAG

Hi,

You need to set LCDMODE to 2 (SUPC_MR) in your case in order to use PIOA and PIOB.

Regards,
bdenis

I already try this at the beginning of main() before PIO_Configure :
AT91C_BASE_SUPC->SUPC_MR = ((0xa5 << 24) & AT91C_SUPC_MKEY) | AT91C_SUPC_LCDMODE_EXTERNAL;
but the program no longer runs !!!

This might be less invasive

AT91C_BASE_SUPC->SUPC_MR = (AT91C_BASE_SUPC->SUPC_MR & ~(AT91C_SUPC_MKEY | AT91C_SUPC_LCDMODE)) | (0xA5 << 24) | AT91C_SUPC_LCDMODE_EXTERNAL;

or

SUPC_EnableSlcd(AT91C_SUPC_LCDMODE_EXTERNAL);

ok, everything works fine now :)
thank you CptTitanic