i use the following code comply with datasheet,but it is not effect.the board was not reset after these code runing.who can tell me what's wrong?


/// Keywords to write to the reset registers
#define RSTC_KEY_PASSWORD (0xA5 << 24)
void SoftwareReset()
{
AT91C_BASE_RSTC->RSTC_RMR |= RSTC_KEY_PASSWORD;
AT91C_BASE_RSTC->RSTC_RCR = AT91C_RSTC_EXTRST | RSTC_KEY_PASSWORD;
}

You should probably mask RMR so the password doesn't get garbled

// Keywords to write to the reset registers
#define RSTC_KEY_PASSWORD (0xA5 << 24)
#define AT91C_RSTC_KEY (0xFF << 24) // (RSTC) Password

void SoftwareReset()
{
AT91C_BASE_RSTC->RSTC_RMR = (AT91C_BASE_RSTC->RSTC_RMR & ~AT91C_RSTC_KEY) | RSTC_KEY_PASSWORD;
AT91C_BASE_RSTC->RSTC_RCR = AT91C_RSTC_EXTRST | RSTC_KEY_PASSWORD;
}

It's also conceivable that you need to enable user resets

AT91C_BASE_RSTC->RSTC_RMR = (AT91C_BASE_RSTC->RSTC_RMR & ~AT91C_RSTC_KEY) | RSTC_KEY_PASSWORD | AT91C_URSTEN;

or perhaps be using the processor reset as apposed to the external one.

AT91C_BASE_RSTC->RSTC_RCR = AT91C_RSTC_PROCRST | RSTC_KEY_PASSWORD;

ok,i already can reset board, but i get the last reset-source is user-reset,not software reset.
i change
AT91C_BASE_RSTC->RSTC_RCR = AT91C_RSTC_EXTRST | RSTC_KEY_PASSWORD;
to
AT91C_BASE_RSTC->RSTC_RCR = AT91C_RSTC_PROCRST | RSTC_KEY_PASSWORD;

after wait 20s time,it can reset,but the reset source is also user-reset,not software reset.
do you know why?