expression must have struct or union type

[BLue]

 uint32_t      err_code;
ble_advdata_t advdata;  // Struct containing advertising parameters

ble_advdata_manuf_data_t        manuf_data; // Variable to hold manufacturer specific data
uint8_t data[]                      = "SomeData!"; // Our data to adverise
manuf_data.company_identifier       = 0x0059; // Nordics company ID
manuf_data.data.p_data              = data;  *****here is that probelm that uint8_t data[] is not strucure or union type*****

manuf_data.data.size                = sizeof(data);

// Build advertising data struct to pass into @ref ble_advertising_init.
memset(&advdata, 0, sizeof(advdata));

advdata.Nilesh               = BLE_ADVDATA_SHORT_NAME;
advdata.short_name_len          = 6;
advdata.flags                   = BLE_GAP_ADV_FLAGS_LE_ONLY_GENERAL_DISC_MODE;
advdata.p_manuf_specific_data   = &manuf_data;

ble_adv_modes_config_t options = {0};
options.ble_adv_fast_enabled  = true;
options.ble_adv_fast_interval = APP_ADV_INTERVAL;
options.ble_adv_fast_timeout  = APP_ADV_TIMEOUT_IN_SECONDS;

err_code = ble_advertising_init(&advdata, NULL, &options, on_adv_evt, NULL);
APP_ERROR_CHECK(err_code);

[butch]

data is type: array of uint8_t. In "...= data", the type of the right hand side is: pointer to uint8_t. Whereas the type of the left hand side of the assignment is not of type: pointer. You need memcpy() to copy an array?

[FormerMember]

From what I can see, the following is correct manuf_data.data.p_data = data;, because an array is a pointer to the first element. However, if it is not working, you can check if it changes anything if data is assigned as a static variable, so that the variable not will be dead when exiting the function_: static uint8_t data[] = "SomeData!";

[butch]

Yes, I was wrong. The type of .p_data is: uint8_t * . So the left and right sides of the assignment ARE the same type. That is baffling. Maybe you could post the exact error message? Maybe you labeled the wrong line that has an error. Try: uint8_t * data = "SomeData", although that should not make a difference?