BLE number of pakets NRF52832

RE: BLE number of pakets NRF52832

marsss — Mon, 25 Nov 2019 09:14:50 GMT

Ok, thanks a lot. this works! 🙂

RE: BLE number of pakets NRF52832

Sigurd — Wed, 20 Nov 2019 13:21:08 GMT

How much RAM the SoftDevice needs depends on how you configure the SoftDevice. Configuring e.g. more characteristics and services, the SoftDevice will require more RAM. The exact number is returned by the function sd_ble_enable(), and if it needs to be adjusted, it’s printed in the nrf_sdh_ble_enable() function in nrf_sdh_ble.c

Snippet:

ret_code_t nrf_sdh_ble_enable(uint32_t * const p_app_ram_start)
{
    // Start of RAM, obtained from linker symbol.
    uint32_t const app_ram_start_link = *p_app_ram_start;

    ret_code_t ret_code = sd_ble_enable(p_app_ram_start);
    if (*p_app_ram_start > app_ram_start_link)
    {
        NRF_LOG_WARNING("Insufficient RAM allocated for the SoftDevice.");

        NRF_LOG_WARNING("Change the RAM start location from 0x%x to 0x%x.",
                        app_ram_start_link, *p_app_ram_start);
        NRF_LOG_WARNING("Maximum RAM size for application is 0x%x.",
                        ram_end_address_get() - (*p_app_ram_start));
    }
    else
    {
        NRF_LOG_DEBUG("RAM starts at 0x%x", app_ram_start_link);
        if (*p_app_ram_start != app_ram_start_link)
        {
            NRF_LOG_DEBUG("RAM start location can be adjusted to 0x%x.", *p_app_ram_start);

            NRF_LOG_DEBUG("RAM size for application can be adjusted to 0x%x.",
                          ram_end_address_get() - (*p_app_ram_start));
        }
    }

    if (ret_code == NRF_SUCCESS)
    {
        m_stack_is_enabled = true;
    }
    else
    {
        NRF_LOG_ERROR("sd_ble_enable() returned %s.", nrf_strerror_get(ret_code));
    }

    return ret_code;
}

RE: BLE number of pakets NRF52832

marsss — Wed, 20 Nov 2019 09:10:36 GMT

Yes, thank you 🙂

Do you know, how big I can big I can do the RAM size? - Or does it depends on the Code size?

RE: BLE number of pakets NRF52832

Sigurd — Tue, 19 Nov 2019 13:22:20 GMT

You need to adjust the allocated RAM to the SoftDevice. In Segger Embedded Studio you can adjust it here:

RE: BLE number of pakets NRF52832

marsss — Tue, 19 Nov 2019 10:44:36 GMT

I tried to Change the NRF_SDH_BLE_GAP_EVENT_LENGTH like you said. But then I get the error 4 which says not enough memory?

RE: BLE number of pakets NRF52832

marsss — Tue, 19 Nov 2019 10:43:19 GMT

Hi,

RE: BLE number of pakets NRF52832

marsss — Mon, 18 Nov 2019 15:50:11 GMT

That could be. No, I don't get an other error code in the debug mode.

I'll try with your tip and give feedback 🙂

Thanks a lot

RE: BLE number of pakets NRF52832

Sigurd — Mon, 18 Nov 2019 15:16:14 GMT

Hi,

The internal SoftDevice buffer is probably full. Do you get any error-codes printed in debug configuration ?

Try increasing NRF_SDH_BLE_GAP_EVENT_LENGTH in sdk_config.h to e.g. 300