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]

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

[Lurn_Z]

Edvin said:

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

yes, I used UART.

Edvin said:

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

Does your custom board have an external LFXTAL?

I only have my custom board with a 32MHz Crystal.

BR

Lurn

[Lurn_Z]

Sorry, I also have a 32.768khz clk.

[Edvin]

I just realized you are the same person that I just answered to in the other ticket

I found it can not start, but when I use the RTT to connect my device, It worked

Could it be that when you connect the RTT, you also connect the UART pins? A floating UART pin (RX in particular), can cause the application to fail. Looking at the ble_app_uart example for reference, in the uart event handler in main.c, you can see that it has the event APP_UART_COMMUNICATION_ERROR, which will trigger an APP_ERROR_CHECK(err), which will reset the application.

For debugging purposes, see if you have something similar in your application, or try to disable the UART to see if the issue still occurs.

Best regards,

Edvin

[Lurn_Z]

yes, it's me

I connect the UART pins, should I set the nrf_gpio_cfg_input(p_config->pselrxd, NRF_GPIO_PIN_NOPULL) to rf_gpio_cfg_input(p_config->pselrxd, NRF_GPIO_PIN_PULLUP) ?

BR,

Lurn

[Edvin]

Ok. Were you able to see the RTT log, then? You did in your other ticket, at least. If not, can you please set a breakpoint in main() in main.c and see if this is reached?

BR,

Edvin

[Lurn_Z]

yes, I can see it, and the breakpoint can be reached.

Thank you very much.

[Edvin]

If you have a floating UART RX or CTS pin that is not connected to anything, and especially without pullup, then the application may crash before the log module is initialized. See if it reaches the main-loop in your project. If not, does it stop the same place every time, or does it vary? And if you disable the UART, does it still stop?

BR,
Edvin

[Lurn_Z]

OK, when I  delete this code nrf_drv_clock_lfclk_request(NULL);  My device started working normally.

And when set the RX pin pullup, I no longer get gibberish data.

So,I think it works fine weather enable the UART or not.

but when I program MBR and application, the FreeRTOS didn't start scheduler.

1. I only program application (address start 0x00), everthing looks ok, I can receive the data I send and rtt will show logs.

2. I program MBR and application (address start 0x1000), logs looks ok before the code running to vTaskStartScheduler(), and then there was nothing, I can't receive anything, even if I keep sending data.

BR,

Lurn