nRF52832 Custom board not advertising after flashing Custom Bootloader (Buttonless)

RE: nRF52832 Custom board not advertising after flashing Custom Bootloader (Buttonless)

Nagarjun — Fri, 17 Jul 2020 07:47:46 GMT

Thanks alot issue has been resolved, it was mainly because, when i downloaded SDK 15.x.x i did not pay much heed to migration document, that was the problem regarding advertisement issue. I am using older SDK everything seems fine now.

To answer your questions:

1. I was using same flash setting than I got debug suggestion to change it.
2. I just added disabled DFU enter through button press and enabled buttonless method and as well adjusted clock source as suggested above.
3. I did it succesfully flashed but no advertisement.

Regards,
Nagarjun CS

RE: nRF52832 Custom board not advertising after flashing Custom Bootloader (Buttonless)

Jared — Thu, 16 Jul 2020 09:08:30 GMT

[quote user="Nagarjun"]But, after I flash my application (built with no errors)even though flashing is succesfull the device shutsdown without advertising. I checked if memory adjustements have to be so,i attahced debugger, but I see no debug results.[/quote]

Seems that maybe you are overwriting the application due to the flash memory settings.

Could you change the FLASH settings to what is used in a SDK example, for example the dfu secure example?
You have obviously changed the Link count in the config file. What other changes have you done? A specific reason for why you changed this?
Have you tried a unmodified SDK DFU example?

RE: nRF52832 Custom board not advertising after flashing Custom Bootloader (Buttonless)

Nagarjun — Wed, 15 Jul 2020 07:21:12 GMT

Okay, starting from building from building bootloader, i built the secure_bootloader project with no errors (after adding custom_board.h and enabling buttonless features in sdk_config) and flashed the soft device and bootloader succesfully. Now, the device advertises successfully in DFU mode, there is no problem there.

But, after I flash my application (built with no errors)even though flashing is succesfull the device shutsdown without advertising. I checked if memory adjustements have to be so,i attahced debugger, but I see no debug results.

RE: nRF52832 Custom board not advertising after flashing Custom Bootloader (Buttonless)

Jared — Wed, 15 Jul 2020 07:14:18 GMT

[quote user="Nagarjun"]But, after i corrected I get no debug messages after flash.[/quote]

Did you build the project without any errors and was is flashed successfully? What do you observe on the board, is it advertising?

RE: nRF52832 Custom board not advertising after flashing Custom Bootloader (Buttonless)

Nagarjun — Tue, 14 Jul 2020 13:12:46 GMT

I realized that soon and took care of it instantly and corrected it in sdk_config. But, after i corrected I get no debug messages after flash.

RE: nRF52832 Custom board not advertising after flashing Custom Bootloader (Buttonless)

Jared — Tue, 14 Jul 2020 12:49:32 GMT

NRF_SDH_BLE_TOTAL_LINK_COUNT should be 2 as NRF_SDH_BLE_TOTAL_LINK_COUNT >= NRF_SDH_BLE_PERIPHERAL_LINK_COUNT+ NRF_SDH_BLE_CENTRAL_LINK_COUNT

RE: nRF52832 Custom board not advertising after flashing Custom Bootloader (Buttonless)

Nagarjun — Tue, 14 Jul 2020 09:29:30 GMT

Any suggestions? I have shared wha you asked.

RE: nRF52832 Custom board not advertising after flashing Custom Bootloader (Buttonless)

Nagarjun — Mon, 13 Jul 2020 07:18:05 GMT

Hi Jared,

Here is the devzone.nordicsemi.com/.../0552.sdk_5F00_config.h you asked for.

Start address:

MEMORY
{
  FLASH (rx) : ORIGIN = 0x26000, LENGTH = 0x52000
  RAM (rwx) :  ORIGIN = 0x200038D8, LENGTH = 0xC728
}

Size of softdevice is 415kb and flash is 512kb. I would like to also mention that, we changed softdevice from S132 V5.0.0 to S132 V6.1.0 to use buutonless feature in bootloader itself. I am now thinking, that it could be a problem as well. Could you let me know ?

Regards,
Nagarjun CS

RE: nRF52832 Custom board not advertising after flashing Custom Bootloader (Buttonless)

Jared — Fri, 10 Jul 2020 13:56:44 GMT

Hi,

Could you share your sdk config file and the start address and size of the Softdevice and FLASH?

regards

Jared

RE: nRF52832 Custom board not advertising after flashing Custom Bootloader (Buttonless)

Nagarjun — Wed, 08 Jul 2020 15:42:04 GMT

Hi Jared,

This is what I get in return from sd_ble_cfg_set()

Regards,
Nagarjun CS

RE: nRF52832 Custom board not advertising after flashing Custom Bootloader (Buttonless)

Jared — Wed, 08 Jul 2020 12:01:57 GMT

"RAM start location can be adjusted to" is outputted when the start address of the application is higher than it must be i.e it's not necessarily a critical error as when there is less RAM available to the application than what is needed. I see that you get an error from sd_ble_cfg_set(), what does it return?

RE: nRF52832 Custom board not advertising after flashing Custom Bootloader (Buttonless)

Nagarjun — Tue, 07 Jul 2020 10:49:36 GMT

Hi Vidar,

I re-verified my settings and changes I made in nrf_bootloader.c. Now, it advertises (but only button press method) with above changes in sdk_config.h and later i flash my application .zip package using nrf connect. And, board did not restart after button. So, when I checked I had to adjust RAM size.

I adjusted these in .ld file and now settings looks like this.

MEMORY
{
  FLASH (rx) : ORIGIN = 0x26000, LENGTH = 0x52000
  RAM (rwx) :  ORIGIN = 0x200038D8, LENGTH = 0xC728
}

And still I get error,

<debug> nrf_sdh_ble: RAM starts at 0x200038D8 
<error> app: Fatal error

I am using Softdevice 132 6.1.0. Could you help me out what am I doing wrong?

Regards,
Nagarjun CS

RE: nRF52832 Custom board not advertising after flashing Custom Bootloader (Buttonless)

Nagarjun — Fri, 03 Jul 2020 14:40:13 GMT

Hi Vidar,

Thanks for the reply.

[quote userid="4240" url="~/f/nordic-q-a/63312/nrf52832-custom-board-not-advertising-after-flashing-custom-bootloader-buttonless/258300"]Do you have the optional 32KHz crystal mounted on your custom board?[/quote]

No, we do not have this.

In custom_board.h, I had set like this

#define NRF_CLOCK_LFCLKSRC      {.source       = NRF_CLOCK_LF_SRC_RC,      \
                                 .rc_ctiv      = 16,                          \
                                 .rc_temp_ctiv = 2,                          \
                                 .accuracy     = NRF_CLOCK_LF_ACCURACY_20_PPM}

But, I made the changes like you mentioned. But, flashing is successful but device doesn't turn on after flashing softdevice and bootloader.

[quote userid="4240" url="~/f/nordic-q-a/63312/nrf52832-custom-board-not-advertising-after-flashing-custom-bootloader-buttonless/258300"]That's an oversight from us, which we have fixed in SDK 17.0.0. It should have been possible to compile the bootloader without defining any buttons.[/quote]

Okay.

If I define buttons and choose to enter bootloader mode through pressing buttons, than i can see LED on after I flash the softdevice and while flashing bottloader and doesn't advertise as well above settings. But, when I choose buttonless, I can't even see LED on.

Could you please guide me further?

Regards,
Nagarjun CS

RE: nRF52832 Custom board not advertising after flashing Custom Bootloader (Buttonless)

Vidar Berg — Fri, 03 Jul 2020 12:00:45 GMT

Hi,

Do you have the optional 32KHz crystal mounted on your custom board? If not, please make sure you have selected the internal RC oscillator as the low-frequency clock source in sdk_config (default is xtal):

// </h> 
//==========================================================

// <h> Clock - SoftDevice clock configuration

//==========================================================
// <o> NRF_SDH_CLOCK_LF_SRC  - SoftDevice clock source.
 
// <0=> NRF_CLOCK_LF_SRC_RC 
// <1=> NRF_CLOCK_LF_SRC_XTAL 
// <2=> NRF_CLOCK_LF_SRC_SYNTH 

#ifndef NRF_SDH_CLOCK_LF_SRC
#define NRF_SDH_CLOCK_LF_SRC 0
#endif

// <o> NRF_SDH_CLOCK_LF_RC_CTIV - SoftDevice calibration timer interval. 
#ifndef NRF_SDH_CLOCK_LF_RC_CTIV
#define NRF_SDH_CLOCK_LF_RC_CTIV 8
#endif

// <o> NRF_SDH_CLOCK_LF_RC_TEMP_CTIV - SoftDevice calibration timer interval under constant temperature. 
// <i> How often (in number of calibration intervals) the RC oscillator shall be calibrated
// <i>  if the temperature has not changed.

#ifndef NRF_SDH_CLOCK_LF_RC_TEMP_CTIV
#define NRF_SDH_CLOCK_LF_RC_TEMP_CTIV 2
#endif

// <o> NRF_SDH_CLOCK_LF_ACCURACY  - External clock accuracy used in the LL to compute timing.
 
// <0=> NRF_CLOCK_LF_ACCURACY_250_PPM 
// <1=> NRF_CLOCK_LF_ACCURACY_500_PPM 
// <2=> NRF_CLOCK_LF_ACCURACY_150_PPM 
// <3=> NRF_CLOCK_LF_ACCURACY_100_PPM 
// <4=> NRF_CLOCK_LF_ACCURACY_75_PPM 
// <5=> NRF_CLOCK_LF_ACCURACY_50_PPM 
// <6=> NRF_CLOCK_LF_ACCURACY_30_PPM 
// <7=> NRF_CLOCK_LF_ACCURACY_20_PPM 
// <8=> NRF_CLOCK_LF_ACCURACY_10_PPM 
// <9=> NRF_CLOCK_LF_ACCURACY_5_PPM 
// <10=> NRF_CLOCK_LF_ACCURACY_2_PPM 
// <11=> NRF_CLOCK_LF_ACCURACY_1_PPM 

#ifndef NRF_SDH_CLOCK_LF_ACCURACY
#define NRF_SDH_CLOCK_LF_ACCURACY 1
#endif

Otherwise, the Softdevice will enter an infinite loop waiting for the non-existent crystal to start up.

[quote user=""]Also, I want to know even though I have disabled NRF_BL_DFU_ENTER_METHOD_BUTTON, why do I have to define NRF_BL_DFU_ENTER_METHOD_BUTTON_PIN (I get error if I don't define) ?[/quote]

That's an oversight from us, which we have fixed in SDK 17.0.0. It should have been possible to compile the bootloader without defining any buttons.

Regards,

Vidar