Populating this struct

Question

Hi,
I defined an address in OTP as my Bluetooth name to display to the user.
I used your hw_otpc_read ( ) to read the OTP data into my RAM variable.

I am not sure how to populate this struct :

struct app_device_info device_info = {
{ USER_DEVICE_NAME_LEN, USER_DEVICE_NAME},
0x0000 };

I will keep the Length as a constant, but USER_DEVICE_NAME confuses me.

This supplies : device_info.dev_name.name

I don’t want to make many changes and then I break the Bluetooth Module.
I see a memcpy ( ) where I could make a change.

What would you suggest?
Thanks Gert

JH_Renesas · Answer

Hi Gert,

There are two place for the device name usage:

1, the device name in the device info structure you can replace the name(from OTP) here in the memory copy :

void app_init(void)
{
    // Reset the environment
    for (int i = 0; i < APP_EASY_MAX_ACTIVE_CONNECTION; i++) { 
        app_env[i] = (struct app_env_tag) {0};
    }
    
    // Initialize device info
    device_info.dev_name.length = (USER_DEVICE_NAME_LEN <= GAP_MAX_NAME_SIZE) ? USER_DEVICE_NAME_LEN : GAP_MAX_NAME_SIZE;
    memcpy(device_info.dev_name.name, USER_DEVICE_NAME, device_info.dev_name.length);
    device_info.appearance = 0x0000;

    // Create APP task
    ke_task_create(TASK_APP, &TASK_DESC_APP);

    // Initialize Task state
    ke_state_set(TASK_APP, APP_DISABLED);
}

2, As I show you with the example prox_report, it has ADV response data contains the device name. So you need change the name here as well:

        // Place the Device Name in the Advertising Data or in the Scan Response Data
        if (USER_DEVICE_NAME_LEN > 0)
        {
            // Get remaining space in the Advertising Data ( plus 2 bytes are used for the length and flag bytes of the Device Name and 3 bytes for the AD type flags)
            uint16_t total_adv_space = 3 + adv_cmd->info.host.adv_data_len + 2 + USER_DEVICE_NAME_LEN;
            // Get remaining space in the Scan Response Data ( plus 2 bytes are used for the length and flag bytes of the Device Name)
            uint16_t total_scan_space = adv_cmd->info.host.scan_rsp_data_len + 2 + USER_DEVICE_NAME_LEN;

            if (total_adv_space <= ADV_DATA_LEN)
            {
                append_device_name(&cmd->info.host.adv_data_len,
                                   USER_DEVICE_NAME_LEN,
                                   &(cmd->info.host.adv_data[cmd->info.host.adv_data_len]),
                                   USER_DEVICE_NAME);
            }
            else if (total_scan_space <= SCAN_RSP_DATA_LEN)
            {
                append_device_name(&cmd->info.host.scan_rsp_data_len,
                                   USER_DEVICE_NAME_LEN,
                                   &(cmd->info.host.scan_rsp_data[cmd->info.host.scan_rsp_data_len]),
                                   USER_DEVICE_NAME);
            }
         }

BR,

JH_Renesas