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Recover nRF52840 dongle after UICR erase

Hello,

I am trying to 'recover nRF52840 dongle after accidental UICR erase' as described here
I did modify my dongle as described here

Unfortunately I do not know how to set the REGOUT0 as described.
I don't know what I am looking for...

Probably a header file which contains the REGOUT0 value (?)

Could you please help me out?

Thanks,

Matthew

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0 haakonsh over 5 years ago

// Configure UICR_REGOUT0 register

NRF_NVMC->CONFIG = NVMC_CONFIG_WEN_Wen;
while (NRF_NVMC->READY == NVMC_READY_READY_Busy){} // Wait for on-going NVMC operation to complete.

NRF_UICR->REGOUT0 = (NRF_UICR->REGOUT0 & ~((uint32_t)UICR_REGOUT0_VOUT_Msk)) |
(UICR_REGOUT0_VOUT_3V3<< UICR_REGOUT0_VOUT_Pos);

NRF_NVMC->CONFIG = NVMC_CONFIG_WEN_Ren;
while (NRF_NVMC->READY == NVMC_READY_READY_Busy){} 

// System reset is needed to update UICR registers.
NVIC_SystemReset();

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0 haakonsh over 5 years ago

// Configure UICR_REGOUT0 register

NRF_NVMC->CONFIG = NVMC_CONFIG_WEN_Wen;
while (NRF_NVMC->READY == NVMC_READY_READY_Busy){} // Wait for on-going NVMC operation to complete.

NRF_UICR->REGOUT0 = (NRF_UICR->REGOUT0 & ~((uint32_t)UICR_REGOUT0_VOUT_Msk)) |
(UICR_REGOUT0_VOUT_3V3<< UICR_REGOUT0_VOUT_Pos);

NRF_NVMC->CONFIG = NVMC_CONFIG_WEN_Ren;
while (NRF_NVMC->READY == NVMC_READY_READY_Busy){} 

// System reset is needed to update UICR registers.
NVIC_SystemReset();

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0 sonus89 over 5 years ago in reply to haakonsh

This is not an answer to my question as I mentioned that I have already found this.

Where do I find the file which contains the code you sent me?
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0 haakonsh over 5 years ago in reply to sonus89

I think it's nrf52840_bitfields.h you're after, located in SDK15.3\modules\nrfx\mdk.
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0 sonus89 over 5 years ago in reply to haakonsh

Thank you!
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0 sonus89 over 5 years ago in reply to haakonsh

Unfortunately it did not work :- (
I need a more detailed explanation.
I know that there is a header file called 'nrf52840_bitfields.h'.
Should I simply add the piece of code to this and rebuild my project with SEGGER ?
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0 haakonsh over 5 years ago in reply to sonus89

You need to call the following piece of code at the beginning of main:

// Configure UICR_REGOUT0 register

NRF_NVMC->CONFIG = NVMC_CONFIG_WEN_Wen;
while (NRF_NVMC->READY == NVMC_READY_READY_Busy){} // Wait for on-going NVMC operation to complete.

NRF_UICR->REGOUT0 = (NRF_UICR->REGOUT0 & ~((uint32_t)UICR_REGOUT0_VOUT_Msk)) |
(UICR_REGOUT0_VOUT_3V3<< UICR_REGOUT0_VOUT_Pos);

NRF_NVMC->CONFIG = NVMC_CONFIG_WEN_Ren;
while (NRF_NVMC->READY == NVMC_READY_READY_Busy){} 

// System reset is needed to update UICR registers.
NVIC_SystemReset();

If nrf52840_bitfields.h is not already included when building main.c then you need to include it.