sd API for GPREGRET2

[jing]

How to access GPREGRET2 with sd API call?

thanks

jing

[Vidar Berg]

This is an unfortunate miss from our side, the s132 lacks API for setting the GPREGRET2 register. However, it is possible to workaround this by disabling the MWU when you want to access it:

 #define TEST_UNPROTECT_POWER \

NRF_MWU->PREGION[0].SUBS &= ~(MWU_PREGION_SUBS_SR0_Include << MWU_PREGION_SUBS_SR0_Pos)

#define TEST_REPROTECT_POWER \

 NRF_MWU->PREGION[0].SUBS |= (MWU_PREGION_SUBS_SR0_Include << MWU_PREGION_SUBS_SR0_Pos) 

This has already been reported internally.

[Chris]

This is still locking up the NRF52 ......

    // TEST_UNPROTECT_POWER
NRF_MWU->PREGION[0].SUBS &= ~(MWU_PREGION_SUBS_SR0_Include << MWU_PREGION_SUBS_SR0_Pos);

// Update it
NRF_POWER->GPREGRET2 = (value_to_write & 0xFF);

// TEST_REPROTECT_POWER
NRF_MWU->PREGION[0].SUBS |= (MWU_PREGION_SUBS_SR0_Include << MWU_PREGION_SUBS_SR0_Pos);

If I comment out the Updating it line of code, no problem.