The RAM usage for s132 with different bandwidth links

RE: The RAM usage for s132 with different bandwidth links

leibin — Thu, 04 Jan 2018 07:43:47 GMT

Yep, this solved my problem. Thanks!

RE: The RAM usage for s132 with different bandwidth links

Petter Myhre — Wed, 03 Jan 2018 13:55:23 GMT

Well, I see that it is not exactly what I'm doing. With your approach p_conn_bw_counts will point to NULL, and the SoftDevice will set standard bandwidths, your specific bandwidth settings will not have any effect. With my approach it will point to the address of &ble_conn_bw_counts. Have you tested?

RE: The RAM usage for s132 with different bandwidth links

leibin — Wed, 03 Jan 2018 02:20:02 GMT

ble_enable_params_t ble_enable_params;

err_code = softdevice_enable_get_default_config(8, 0, &ble_enable_params);

ble_enable_params.common_enable_params.p_conn_bw_counts->rx_counts.high_count = 8;
ble_enable_params.common_enable_params.p_conn_bw_counts->rx_counts.mid_count  = 0;
ble_enable_params.common_enable_params.p_conn_bw_counts->rx_counts.low_count  = 0;
ble_enable_params.common_enable_params.p_conn_bw_counts->tx_counts.high_count = 8;
ble_enable_params.common_enable_params.p_conn_bw_counts->tx_counts.mid_count  = 0;
ble_enable_params.common_enable_params.p_conn_bw_counts->tx_counts.low_count  = 0;

CHECK_RAM_START_ADDR(8,0);

err_code = softdevice_enable(&ble_enable_params);

RE: The RAM usage for s132 with different bandwidth links

leibin — Wed, 03 Jan 2018 02:19:53 GMT

Hi Petter, I think that's exactly what I do in my code as below. And it works fine. The only thing as I mentioned above confusing me is that after I changing the bandwidth counter in ble_conn_bw_counts and keeping ble_enable_params.gap_enable_params.central_conn_count as the same value 8 the value of app_ram_base is not changed. But if I change the value of ble_enable_params.gap_enable_params.central_conn_count the value of app_ram_base is also changed accordingly. Looks like app_ram_base just depends on central_conn_count and has nothing to do with bandwidth counter. This is not the same as s132 spec mentions.

RE: The RAM usage for s132 with different bandwidth links

Petter Myhre — Tue, 02 Jan 2018 14:26:52 GMT

I think you need to do something like this:

ble_enable_params.gap_enable_params.central_conn_count = 8;

ble_conn_bw_counts_t ble_conn_bw_counts;
memset(&ble_conn_bw_counts, 0x00, sizeof(ble_conn_bw_counts_t));

ble_conn_bw_counts.rx_counts.high_count = 8;
ble_conn_bw_counts.rx_counts.mid_count = 0;
ble_conn_bw_counts.rx_counts.low_count = 0;
ble_conn_bw_counts.tx_counts.high_count = 8;
ble_conn_bw_counts.tx_counts.mid_count = 0;
ble_conn_bw_counts.tx_counts.low_count = 0;

ble_enable_params.common_enable_params.p_conn_bw_counts = &ble_conn_bw_counts;

// Enable BLE stack.
err_code = softdevice_enable(&ble_enable_params);
APP_ERROR_CHECK(err_code);

Let me know how it goes.