the multilink example and the CDC ACM example in SDK15.

[jwcheon]

Hi,
I am merging the multilink example and the CDC ACM example in SDK15.

However, if you merge and run it, it will continue to fail.

Here is the source.

#define CDC_Code 1
#define Multi_Code 0
int main(void)
{
// CDC Code Start
#if CDC_Code
	ret_code_t ret;
	static const app_usbd_config_t usbd_config = {
		.ev_state_proc = usbd_user_ev_handler
	};

	ret = NRF_LOG_INIT(NULL);
	APP_ERROR_CHECK(ret);

	ret = nrf_drv_clock_init();
	APP_ERROR_CHECK(ret);

	nrf_drv_clock_lfclk_request(NULL);

	while(!nrf_drv_clock_lfclk_is_running())
	{
		/* Just waiting */
	}

	ret = app_timer_init();
	APP_ERROR_CHECK(ret);

	init_bsp();
	init_cli();

	app_usbd_serial_num_generate();

	ret = app_usbd_init(&usbd_config);
	APP_ERROR_CHECK(ret);
	NRF_LOG_INFO("USBD CDC ACM example started.");

	app_usbd_class_inst_t const * class_cdc_acm = app_usbd_cdc_acm_class_inst_get(&m_app_cdc_acm);
	ret = app_usbd_class_append(class_cdc_acm);
	APP_ERROR_CHECK(ret);

	if (USBD_POWER_DETECTION)
	{
		ret = app_usbd_power_events_enable();
		APP_ERROR_CHECK(ret);
	}
	else
	{
		NRF_LOG_INFO("No USB power detection enabled\r\nStarting USB now");

		app_usbd_enable();
		app_usbd_start();
	}
#endif
// CDC Code End
#if Multi_Code
    // Initialize.
	log_init();
    timer_init();
    leds_init();
    buttons_init();
    power_management_init();
    ble_stack_init();
    gatt_init();
    db_discovery_init();
    lbs_c_init();
    ble_conn_state_init();

    // Start execution.
    NRF_LOG_INFO("Multilink example started.");
    scan_start();
#endif
    for (;;)
    {
    #if CDC_Code
        while (app_usbd_event_queue_process())
        {
            /* Nothing to do */
        }
        
        if(m_send_flag)
        {
            static int  frame_counter;

            size_t size = sprintf(m_tx_buffer, "Hello USB CDC FA demo: %u\r\n", frame_counter);

            ret = app_usbd_cdc_acm_write(&m_app_cdc_acm, m_tx_buffer, size);
            if (ret == NRF_SUCCESS)
            {
                ++frame_counter;
            }
        }
        
        nrf_cli_process(&m_cli_uart);

        UNUSED_RETURN_VALUE(NRF_LOG_PROCESS());
        /* Sleep CPU only if there was no interrupt since last loop processing */
        __WFE();
		#endif
		#if Multi_Code
        idle_state_handle();
		#endif
    }
}

I have set the CDC and Multilink flags in this way, and each runs separately when run separately. However, if I turn on two flags, an error occurs.

When debugging with kale, the part where the error occurs

init_cli();

Here, an error is seen to occur.
What parts can I fix? Please help me.

[jwcheon]

I found the problem.
// init_bsp ();
// init_cli ();
It seems like the action is done like this.

Is it ok to use the two functions annotated?
The init_bsp () function seems to be a function that manages button events,
The init_cli () function does not know what its purpose is.

[Sigurd]

Hi,

By combining the code like this, you are initializing some of the modules more than once. Also by calling both init_bsp() and buttons_init(), you are trying to configure a second GPIOTE channel to the same pin/button again, and you will end up in the error-handler. The init_cli() function will initialize the Command Line Interface library. See this page for more information about CLI.

I would recommend that you take a look at the USBD BLE UART Example, and see how that examples has combined the BLE and USB CDC ACM part together.