clock issue in FreeRTOS integration with Mesh code

[Chaabane]

Hi,

I'm using nRF52840 (rev 1.0.0) and Mesh 2.0.1 and SD 15.0.0. 

I added FreeRTOS following the example "hrs FreeRTOS".

In FreeRTOS, the source clock (configTICK_SOURCE) is configured as FREERTOS_USE_SYSTICK.

When I call nrf_drv_clock_init() and then sd_softdevice_enable(...), I get error 0x1001 "NRF_ERROR_SDM_INCORRECT_INTERRUPT_CONFIGURATION".

Without the *** init function, when FreeRTOS tries to setup the RTC in

void vPortSetupTimerInterrupt( void )
{
    /* Request LF clock */
    nrf_drv_clock_lfclk_request(NULL);

    /* Configure SysTick to interrupt at the requested rate. */
    nrf_rtc_prescaler_set(portNRF_RTC_REG, portNRF_RTC_PRESCALER);
    nrf_rtc_int_enable   (portNRF_RTC_REG, RTC_INTENSET_TICK_Msk);
    nrf_rtc_task_trigger (portNRF_RTC_REG, NRF_RTC_TASK_CLEAR);
    nrf_rtc_task_trigger (portNRF_RTC_REG, NRF_RTC_TASK_START);
    nrf_rtc_event_enable(portNRF_RTC_REG, RTC_EVTEN_OVRFLW_Msk);

    NVIC_SetPriority(portNRF_RTC_IRQn, configKERNEL_INTERRUPT_PRIORITY);
    NVIC_EnableIRQ(portNRF_RTC_IRQn);
}

The call request for the clock fail cause the module ( clock) is not initialized ! " ASSERT(m_clock_cb.module_initialized);"

how can I initialize the clock and not get an error from the softdevice init function ?

[Hung Bui]

Hi, 

 

I suspect you got that error because the call nrfx_clock_enable() will enable the LFCLK interrupt and with high priority that not allowed by the softdevice. You should check NRFX_CLOCK_CONFIG_IRQ_PRIORITY in sdk_config.h, it should be at 7. 

 

Another suggestion is to call sd_softdevice_enable() (or nrf_sdh_enable_request)  before initialize FREERTOS.  

I actually don't have much experience with FreeRTOS, so not really sure if FreeRTOS need to be initialized before the softdevice or not.  

[Chaabane]

The NRFX_CLOCK_CONFIG_IRQ_PRIORITY  is set to 7.

I init the clock and the softdevice before FreeRTOS

I tried calling nrf_drv_clock_init() and then sd_softdevice_enable() but I get the same error. Is that normal ?

[Hung Bui]

Could you clarify, you haven't start any FreeRTOS code and you have the issue ? If it's the case, i would suggest to check with our default application and see why it didn't work in your case. 

[Chaabane]

I tested this on the light switch provisionner and added nrf_drv_clock_init(); before the soft device init function, so the code looks like below but still I got the same error in sd_softdevice_enable()

I still ge the same error 0x1001  in sd_softdevice_enable()

    ret_code_t err_code = nrf_drv_clock_init();
    APP_ERROR_CHECK(err_code);

    /* Mesh Init */
    nrf_clock_lf_cfg_t lfc_cfg = DEV_BOARD_LF_CLK_CFG;
    ERROR_CHECK(mesh_softdevice_init(lfc_cfg));
    mesh_init();

[Hung Bui]

Hi Malki, 

Do you use nrf_sdh module to enable softdevice and handle softdevice request ? The nrf_clock module is designed with relation with nrf_sdh module.I would suggest to enable softdevice you use the nrf_sdh module instead of using mesh_softdevice_init.c 

You can refer and test with my example here (I use nrf_sdh in that example instead of mesh_sottdevice_init.c) 

Please let me know if it works for you. 

[Chaabane]

It seems to work by calling

nrf_drv_clock_init();

run FreeRTOS scheduler

nrf_sdh_enable_request();

Thank you for your help