SOFT DEVICE : INVALID MEMORY ACCESS - START CLOCK AND SOFT DEVICE not working together.

RE: SOFT DEVICE : INVALID MEMORY ACCESS - START CLOCK AND SOFT DEVICE not working together.

TEJASWINI J — Wed, 31 Oct 2018 04:11:08 GMT

nrf_drv_timer_config_t timer_cfg = NRF_DRV_TIMER_DEFAULT_CONFIG;
        err_code = nrf_drv_timer_init( &m_timer2, &timer_cfg, sample_counter_event_handler );
        APP_ERROR_CHECK( err_code );

        nrf_drv_timer_clear( &m_timer2 );
        nrf_drv_timer_extended_compare( &m_timer2, NRF_TIMER_CC_CHANNEL0, XXX, NRF_TIMER_SHORT_COMPARE0_CLEAR_MASK, true );
     //XXX is the data count we want to ready from the Channel Register.
        // Configuring the PPI used for automating the data streaming
        err_code = nrf_drv_ppi_channel_alloc( &m_ppi_channel );
        APP_ERROR_CHECK( err_code );

        // Set up PPI Chn0 for triggering of SPIM start when DR pin event occurs (set up for falling edge event)
        err_code = nrf_drv_ppi_channel_assign( m_ppi_channel,
                                               nrf_drv_gpiote_in_event_addr_get( AFE_DR_PIN ),
                                               nrf_spim_task_address_get( nrfbusHandle->busIdentifier.u.spim.p_reg, NRF_SPIM_TASK_START ) );
        APP_ERROR_CHECK( err_code );

        // Fork PPI to also trigger count on timer2 to keep track of number of samples.
        err_code = nrf_drv_ppi_channel_fork_assign( m_ppi_channel,
                                                    nrf_drv_timer_task_address_get( &m_timer2, NRF_TIMER_TASK_COUNT ) );
        APP_ERROR_CHECK( err_code );

nrf_drv_timer_clear( &m_timer2 );
    nrf_drv_timer_enable( &m_timer2 );
    err_code = nrf_drv_ppi_channel_enable( m_ppi_channel );
    APP_ERROR_CHECK(err_code);

This is the code. The last second line is causing a Problem.

My code is not executed Further.

I tried disabling the Soft device also, but the code was still hung.

RE: SOFT DEVICE : INVALID MEMORY ACCESS - START CLOCK AND SOFT DEVICE not working together.

Jørgen Holmefjord — Tue, 30 Oct 2018 09:28:02 GMT

Please post your code showing how you configure/enable timer. You can also upload your entire project for us to help you debug the issue.

RE: SOFT DEVICE : INVALID MEMORY ACCESS - START CLOCK AND SOFT DEVICE not working together.

TEJASWINI J — Tue, 30 Oct 2018 09:12:00 GMT

Hi Jorgen!

No its not in a Loop... I am trying to initialize a PPI.

First I init the Timer and perform a NRF Extended Compare.

Then I am enabling the Timer. My code is hung at this point.

I tried to debug , but this can take place only when i Issue a BLE Command. I am not finding a uniform behavior to share with you.

Could please help in telling me where to look at.

🙂 Tejaswini 🙂

RE: SOFT DEVICE : INVALID MEMORY ACCESS - START CLOCK AND SOFT DEVICE not working together.

Jørgen Holmefjord — Tue, 30 Oct 2018 08:34:48 GMT

What do you mean by the following?

[quote user="TEJASWINI J"]"nrf_drv_timer_extended_compare" is causing my code to hang.[/quote]

Is the application stuck in some loop? Have you tried debugging to check for error codes?

RE: SOFT DEVICE : INVALID MEMORY ACCESS - START CLOCK AND SOFT DEVICE not working together.

TEJASWINI J — Tue, 30 Oct 2018 05:32:04 GMT

Hi Jorgen!

Thank You for your timely reply. 🙂

I am using Timer - 2 as a Counter.

"nrf_drv_timer_extended_compare" is causing my code to hang. Can you please help me in understanding.

:) Tejaswini :)

RE: SOFT DEVICE : INVALID MEMORY ACCESS - START CLOCK AND SOFT DEVICE not working together.

Jørgen Holmefjord — Tue, 23 Oct 2018 08:47:10 GMT

Hi,

The softdevice will block or restrict access to some Hardware peripherals when it is enabled, including the CLOCK peripheral. Trying to access the peripheral registers directly will result in invalid address access.

The restricted peripherals can be accessed through the softdevice API, specifically you can use sd_clock_hfclk_request and sd_clock_hfclk_release to start and stop the HF clock.

Best regards,
Jørgen