Multiple BLE_CUS_DEF() calls error

RE: Multiple BLE_CUS_DEF() calls error

Edvin — Thu, 28 Nov 2024 08:29:30 GMT

/* near top of your main.c file */
#define BLE_CUSTOM_SERVICE_ARRAY_DEF(_name, _cnt)                 \
static ble_nus_c_t _name[_cnt];                          \
NRF_SDH_BLE_OBSERVERS(_name ## _obs,                     \
                      BLE_NUS_C_BLE_OBSERVER_PRIO,       \
                      ble_evt_handler, &_name, _cnt)
                      
                      
BLE_CUSTOM_SERVICE_ARRAY_DEF(m_ble_observers, MAX_CONNECTIONS)

Try adding this close to the top of your main.c. This will generate context pointers to each of your instances. You need to place it in main.c, since this is where your ble_evt_handler is defined. You may need to declare the ble_evt_handler before your call to BLE_CUSTOM_SERVICE_ARRAY_DEF() like this:

static void ble_evt_handler(ble_evt_t const * p_ble_evt, void * p_context);

Best regards,

Edvin

RE: Multiple BLE_CUS_DEF() calls error

arnold park.jr — Thu, 28 Nov 2024 07:56:17 GMT

Thx for your fast reply.

I defined like below.

static void * const obs_context[] = {NULL, NULL, NULL, NULL, NULL, NULL }

NRF_SDH_BLE_OBSERVERS(m_ble_observers, 3, ble_evt_handler, obs_context, 6); //This define is in ble_stack_init() function.

But an error corrupt, 'expression must have a constant value'. I cant understand which parameter should be in NRF_SDH_BLE_OBSERVERS().

RE: Multiple BLE_CUS_DEF() calls error

Edvin — Thu, 28 Nov 2024 07:45:30 GMT

Hello,

I suggest you study the SDK\examples\ble_central\ble_app_uart_c example, and look at how it uses defines:

/** @brief Macro for defining multiple ble_nus_c instances.
 *
 * @param   _name   Name of the array of instances.
 * @param   _cnt    Number of instances to define.
 * @hideinitializer
 */
#define BLE_NUS_C_ARRAY_DEF(_name, _cnt)                 \
static ble_nus_c_t _name[_cnt];                          \
NRF_SDH_BLE_OBSERVERS(_name ## _obs,                     \
                      BLE_NUS_C_BLE_OBSERVER_PRIO,       \
                      ble_nus_c_on_ble_evt, &_name, _cnt)

in ble_nus_c.h. You can do something similar in your application. Create a macro called BLE_CUSTOM_SERVICE_ARRAY_DEF(_name, _cnt), and use it from your main.c. The only thing you need to change is the name of the macro (BLE_CUSTOM_SERVICE_ARRAY_DEF(), and make sure to keep the _cnt argument up to date from where it is being called in main.c. (you can set it equal to NRF_SDH_BLE_PERIPHERAL_LINK_COUNT or NRF_SDH_BLE_CENTRAL_LINK_COUNT, perhaps).

You also need to replace ble_nus_c_on_ble_evt with the name of the callback function that you want to use for this observer, and to replace the BLE_NUS_C_BLE_OBSERVER_PRIO with whatever priority you want to use. Either create a new definition in sdk_config.h, or just use one of the ones that are available in the sdk_config.h file. Search for "OBSERVER_PRIO", and use one of them. As you can see, they are typically set to 2, so you can use this.

Best regards,

Edvin

RE: Multiple BLE_CUS_DEF() calls error

arnold park.jr — Thu, 28 Nov 2024 01:58:32 GMT

Hi.. i facing this issue too. If I defined NRF_SDH_BLE_OBSERVER'S'(), not NRF_SDH_BLE_OBSERVER(), error corrupt called 'expression must have pointer-to-object type'.
I dont know how to use it

Plz tell share me how to fixed it.

RE: Multiple BLE_CUS_DEF() calls error

Abiots — Wed, 13 Sep 2023 04:14:16 GMT

Hi, I too am facing similar issues, may I know how you fixed it?

RE: Multiple BLE_CUS_DEF() calls error

thoric_fish — Fri, 13 Sep 2019 03:45:52 GMT

Hi an update: I got it working after using NRF_SDH_BLE_OBSERVERS().

RE: Multiple BLE_CUS_DEF() calls error

thoric_fish — Wed, 11 Sep 2019 16:55:06 GMT

SDK v15.

err_code = ble_cus_init(&m_cus, &cus_init);
        APP_ERROR_CHECK(err_code);

returns NRF_SUCESS and the rest of the code in main() for initializing the services and advertising works. The advertising starts normally and I can scan & connect to the DK. But immediately after the connection is made the connection disconnects and I cannot reconnect. If I remove BLE_CUS_DEF(m_cus2); from main.c there is no longer this issue.

RE: Multiple BLE_CUS_DEF() calls error

Edvin — Wed, 11 Sep 2019 08:40:56 GMT

Hello,

What SDK version are you using?

Have you checked whether one of your function calls returns an err_code != NRF_SUCCESS?