How to stop/disable/uninit CLI instance and USB CDC/ACM instance gracefully?

[OceanS]

Hi, 

environment as below, 

(1) upon SDK (nRF5_SDK_15.3.0_59ac345)

(2) Nordic Open_Bootloader (example project: Open_bootloader_usb_mbr_pca10056_debug) 

(3) Nordic 52840 DK (PCA10056)

I am trying to do (1) close CLI instance gracefully  (2) close USB CDC/ACM instance gracefully, however I get error as below, 

app: ERROR 3735928559 [Unknown error code] at C:\nRFSrcRoot\nRF5_SDK_15.3.0_59ac345\modules\nrfx\drivers\src\nrfx_usbd.c:1708 PC at: 0x0003D4E7

My source code like below (order also as below). Could you please let me how I could get it done properly? Thanks 

void mygraceful_close(){

       nrf_cli_stop(&m_cli_cdc_acm);

       nrf_cli_uninit(&m_cli_cdc_acm);

       app_usbd_stop();

       app_usbd_uninit();
       app_usbd_disable();

}

Regards

J.S.

[Amanda Hsieh]

Hi, 

 

app: ERROR 3735928559 [Unknown error code] at C:\nRFSrcRoot\nRF5_SDK_15.3.0_59ac345\modules\nrfx\drivers\src\nrfx_usbd.c:1708 PC at: 0x0003D4E7

 nrfx_usbd.c:1708 is inside nrfx_usbd_init(). 

Please set up the Debugging environment as shown in this Youtube tutorial.

So it looks like you have an issue enabling USBD. Please refer to the sdk_config.h in the USB Device Example.

-Amanda H.

[OceanS]

Hi, Thanks for your response. 

You may have missed some of my details.  I am ok to init USBD. 

nrfx_usbd.c:1708 is inside nrfx_usbd_uninit(). 

void nrfx_usbd_uninit(void)
{
NRFX_ASSERT(m_drv_state == NRFX_DRV_STATE_INITIALIZED);

m_event_handler = NULL;
m_drv_state = NRFX_DRV_STATE_UNINITIALIZED;
return;
}

if possible, could you please give me any suggestion in how to 

 (1) close CLI instance gracefully  (2) close USB CDC/ACM instance gracefully

Thanks. 

Regards

J.S.

[Amanda Hsieh]

Hi, 

I think you should call app_usbd_disable(); before app_usbd_uninit();

-Amanda H.

[OceanS]

Hi Amanda, 

(1) Re how to close USB CDC/ACM instance gracefully, Actually seemingly the code below isn't enough if you have chance to run code in practical example

app_usbd_stop();  // this would trigger an Assert, 

app_usbd_uninit();
app_usbd_disable();

Anyway, just comment out the Assert and let it go. 

(2) Re how to close CLI gracefully, also the code below isn't enough if you build a quit command for CLI as, 

nrf_cli_stop(&m_cli_cdc_acm);

nrf_cli_uninit(&m_cli_cdc_acm);

Via a Putty or Picocom to prove, you would find the instance isn't stopped and disconnected.  

Could you please help me clarify how to close CLI gracefully?  

Thanks.

Regards

J.S.

[jing]

how about 

nrf_cli_stop(&m_cli_cdc_acm);

app_usbd_stop();

while (nrfx_usbd_is_enabled()) ;

jing