把gpio全部開成quasi high.
/* Unlock protected registers */
while(SYS->REGLCTL != 1)
{
SYS->REGLCTL = 0x59;
SYS->REGLCTL = 0x16;
SYS->REGLCTL = 0x88;
}
// Enable sleep deep mode
SCB->SCR = SCB_SCR_SLEEPDEEP_Msk;
// Enable power down mode
CLK->PWRCTL |= (CLK_PWRCTL_PDEN_Msk);
// Power down
__WFI();
while(1);
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楼主
