NRF522832 FreeRTOS can't start.

[Lurn_Z]

Hi everyone:

I developed an application based on freertos, but when I download it, I found it can not start, but when I use the RTT to connect my device, It worked.

The commend is

nrfutil settings generate --family NRF52 --application app.hex --application-version 0 --bootloader-version 0 --bl-settings-version 2 settings.hex
nrfjprog --eraseall -f NRF52
nrfjprog --program mbr_nrf52_2.4.1_mbr.hex --verify -f NRF52
nrfjprog --program nrf52832_xxaa_mbr.hex --verify -f NRF52
nrfjprog --program app.hex --verify -f NRF52
nrfjprog --program settings.hex --verify -f NRF52
nrfjprog --reset -f NRF52

SDK is 17.1.0.

Best regards,

Lurn.

[Edvin]

Hello,

I don't know what you have programmed using these commands. Did you program two MBRs? 

What HW are you running on? Is it a DK or a custom board?

Best regards,

Edvin

[Lurn_Z]

Sorry, the command is following, and I also try use keil to download.

nrfjprog --eraseall -f NRF52
nrfjprog --program mbr_nrf52_2.4.1_mbr.hex --verify -f NRF52
nrfjprog --program app.hex --verify -f NRF52
nrfjprog --reset -f NRF52

After building, I downloaded flash_ Mbr first, and then download the application.

The HW is custom board.

BR

Lurn

[Lurn_Z]

Ok, I found the problem, but I don't know why.

Before the tasks create, I init the clock, when I  use the code, my device won't start.

{
    ...
    
    nrf_drv_clock_lfclk_request(NULL);
    
    while(!nrf_clock_lf_is_running()){;}
    
    ...
}

I used the code because the example flash_fstorage include it, but when I delete it, my device turned on, and logs doesn't seem to have any effect.

So, Why does this affect device startup?

BR

Lurn

[Lurn_Z]

In my esb program I used this

static void clock_start(void)
{
    NRF_CLOCK->EVENTS_HFCLKSTARTED = 0;
    NRF_CLOCK->TASKS_HFCLKSTART = 1;
    while(NRF_CLOCK->EVENTS_HFCLKSTARTED == 0);
}

maybe this is the location of conflict.

But why can I use RTT  connect to startup?

BR

Lurn

[Edvin]

Is your application (either log or application itself) using UART?

Can you try it on a DK? Does the same happen there?

Does your custom board have an external LFXTAL?

Best regards,

Edvin