Reset button doesn't work on some nRF52840 DK PCA10056 1.0.0 boards

RE: Reset button doesn't work on some nRF52840 DK PCA10056 1.0.0 boards

AndreasF — Wed, 03 Oct 2018 13:32:13 GMT

Hi.

You pin reset number is not 18 somehow, as it should be, but 21.

Can you open the project you have programmed the boards you have a problem with and search for:

NRF_UICR->PSELRESET[0] and NRF_UICR->PSELRESET[1]

They should be set to 18, not 21.

Like this:

    #if defined (CONFIG_GPIO_AS_PINRESET)
        if (((NRF_UICR->PSELRESET[0] & UICR_PSELRESET_CONNECT_Msk) != (UICR_PSELRESET_CONNECT_Connected << UICR_PSELRESET_CONNECT_Pos)) ||
            ((NRF_UICR->PSELRESET[1] & UICR_PSELRESET_CONNECT_Msk) != (UICR_PSELRESET_CONNECT_Connected << UICR_PSELRESET_CONNECT_Pos))){
            NRF_NVMC->CONFIG = NVMC_CONFIG_WEN_Wen << NVMC_CONFIG_WEN_Pos;
            while (NRF_NVMC->READY == NVMC_READY_READY_Busy){}
            NRF_UICR->PSELRESET[0] = 18;
            while (NRF_NVMC->READY == NVMC_READY_READY_Busy){}
            NRF_UICR->PSELRESET[1] = 18;
            while (NRF_NVMC->READY == NVMC_READY_READY_Busy){}
            NRF_NVMC->CONFIG = NVMC_CONFIG_WEN_Ren << NVMC_CONFIG_WEN_Pos;
            while (NRF_NVMC->READY == NVMC_READY_READY_Busy){}
            NVIC_SystemReset();
        }
    #endif

You can find them in the system_nrf52840.c file.

Hopefully this works.

- Andreas

RE: Reset button doesn't work on some nRF52840 DK PCA10056 1.0.0 boards

mtfurlan_t — Wed, 03 Oct 2018 12:57:57 GMT

0x10001200: 00000015 00000015

RE: Reset button doesn't work on some nRF52840 DK PCA10056 1.0.0 boards

AndreasF — Wed, 03 Oct 2018 07:02:16 GMT

Hi.

Could you try this command on both board that does not work:

nrfjprog --memrd 0x10001200 --w 32 --n 8

Please post the output, it should be:

0x10001200: 00000012 00000012                     |........|

- Andreas

RE: Reset button doesn't work on some nRF52840 DK PCA10056 1.0.0 boards

mtfurlan_t — Tue, 02 Oct 2018 13:30:52 GMT

That works fine.

The two boards that are having this issue are

PCA10056 1.0.0 2018.17 683415786

PCA10056 1.0.0 2018.17 683742869

One of the boards that works is

PCA10056 1.0.0 2018.20 683557756

Also working are the boards I tried under version 1.0.0

RE: Reset button doesn't work on some nRF52840 DK PCA10056 1.0.0 boards

AndreasF — Tue, 02 Oct 2018 06:34:27 GMT

Hi.

Could you try to hold down the RESET button, and switch the board off and on, and release the RESET button.

Is LED 5 blinking slowly? If it is then the RESET button is connected to the debugger as it should be.

- Andreas

RE: Reset button doesn't work on some nRF52840 DK PCA10056 1.0.0 boards

mtfurlan_t — Mon, 01 Oct 2018 13:26:08 GMT

I have it defined in CFLAGS and ASMFLAGS

CFLAGS += -DCONFIG_GPIO_AS_PINRESET

ASMFLAGS += -DCONFIG_GPIO_AS_PINRESET

RE: Reset button doesn't work on some nRF52840 DK PCA10056 1.0.0 boards

AndreasF — Mon, 01 Oct 2018 10:48:54 GMT

Hi.

Can you check that you have CONFIG_GPIO_AS_PINRESET defined in your preprosessor settings?

Open Project Options --> Select Common --> Preprocessor --> Preprosessor Definitions --> CONFIG_GPIO_AS_PINRESET should be in that list

- Andreas

RE: Reset button doesn't work on some nRF52840 DK PCA10056 1.0.0 boards

mtfurlan_t — Thu, 27 Sep 2018 12:49:14 GMT

I don't actually have the function nrf_drv_usbd_errata_type_52840_fp1.

I'm actually on nRF5_SDK_15.2.0_9412b96 not 15.0.0.

RE: Reset button doesn't work on some nRF52840 DK PCA10056 1.0.0 boards

AndreasF — Thu, 27 Sep 2018 09:04:36 GMT

Hi.

Then there shouldn't be anything wrong with the hardware. Can you try to modify what I wrote in my last reply?

- Andreas

RE: Reset button doesn't work on some nRF52840 DK PCA10056 1.0.0 boards

mtfurlan_t — Wed, 26 Sep 2018 15:48:52 GMT

I do see a 30ms drop to ground on pin 18.

RE: Reset button doesn't work on some nRF52840 DK PCA10056 1.0.0 boards

AndreasF — Wed, 19 Sep 2018 07:28:03 GMT

Hi.

1. Are the kits connected with USB? Make sure your kit is connected with USB. Could you measure using a oscilloscope that there is a pulse from P0.18 when you press reset? I had a 30ms pulse.

2. If there is no pulse, could you try modifying the following:

The function found in line 94 in nrf_drv_usbd_errata.h in location nRF5_SDK_15.0.0_a53641a\components\drivers_nrf\usbd

static inline bool nrf_drv_usbd_errata_type_52840_fp1(void)
{
    return ( nrf_drv_usbd_errata_type_52840() &&
               ( ((*(uint32_t *)0xF0000FE8) & 0xF0) == 0x10 ) &&
               ( ((*(uint32_t *)0xF0000FEC) & 0xF0) == 0x00 ) );
}

Try changing it to:

static inline bool nrf_drv_usbd_errata_type_52840_fp1(void)
{
    return ( nrf_drv_usbd_errata_type_52840() &&
               ( ((*(uint32_t *)0xF0000FE8) & 0xF0) == 0x20 ) && // note: modified from 0x10 to 0x20!
               ( ((*(uint32_t *)0xF0000FEC) & 0xF0) == 0x00 ) );
}

There could be that this small bug in the SDK is causing your issue.

- Andreas

RE: Reset button doesn't work on some nRF52840 DK PCA10056 1.0.0 boards

mtfurlan_t — Tue, 18 Sep 2018 13:02:04 GMT

So on a board where the reset button does work, SB42 and P0.18 are around 3V unrelated to if I am pressing the reset button or not.

When the board is off, I can see connectivity between P0.18 and SB42, but not to any of the pads of the reset button.

I don't see a difference on boards that don't have a working reset button.

RE: Reset button doesn't work on some nRF52840 DK PCA10056 1.0.0 boards

AndreasF — Mon, 17 Sep 2018 09:08:04 GMT

Hi.

Could you first measure if you have a signal on P0.18 when you click on RESET?

And then measure SB42 when you click on RESET?

You find SB42 close to DEBUG IN

- Andreas