Hi,
i am trying to get stm32l476RET6 to deep sleep ( shutdown or standby mode) following mbed examples, but the processors power consumption i measure is not even close at the correct consumption in these modes.
At some point, befote WFI() function, i write PWR->CR1 power mode selection bits
, after that i read their value and the result i see is that PWR->CR1 value stays unaffected ( default 0x0200 ) , although it's bits have RW permissions.
printf("cr1 before : %lu\n",PWR->CR1);
// Select low power mode: SHUTDOWN
PWR->CR1 |= 0x4003;
or
PWR->CR1 |= PWR_CR1_LPMS_STANDBY;
printf("cr1 after : %lu\n",PWR->CR1);
Could you help me with what i am missing here?
Thank you.
