Close ANT HRM channel and save to SDcard ?

[RixtronixLAB]

Dear Members,

How can I stop ANT HRM channel temporarily, and save the heart rate value on to SDcard ?

My code at static void page0_data_log(ant_hrm_page0_data_t const * p_page_data),

err_code = sd_ant_channel_close(HRM_CHANNEL_NUM);
APP_ERROR_CHECK(err_code);
        
        log_hrm(p_page_data->computed_heart_rate); //log HRM value 8Dec21 Rixtronix LAB
        //open the channel
        err_code=sd_ant_channel_open(HRM_CHANNEL_NUM);
        APP_ERROR_CHECK(err_code);

Please revise me ?

Thanks

[Kenneth]

After issuing the sd_ant_channel_close() you need to wait for the event that indicate the channel is closed (this may take some time, since it depends for instance on the channel period).

Kenneth

[RixtronixLAB]

the event that indicate the channel is closed ,which event ? thanks...

code :

 
		err_code = sd_ant_channel_close(HRM_CHANNEL_NUM);
     APP_ERROR_CHECK(err_code);
		
		 if (err_code==NRF_SUCCESS )
			 {
				 
		      err_code = sd_ant_channel_unassign(HRM_CHANNEL_NUM); 
				 NRF_LOG_INFO("WRITE HRM TO SDcard Page 0...\r\n");
		
				 
			 }

Please correct me the sequence and where should I put that sequence of closing the channel, write to SDcard and reopen again ?

Thanks

[Kenneth]

You should receive an EVENT_CHANNEL_CLOSED event in your event handler. The easiest way to find the name of the event handler may be to search the project for NRF_SDH_ANT_OBSERVER(). It may look something like this (example taken from ant_hrm_tx):

You may also add your own NRF_SDH_ANT_OBSERVER() if you like.

Kenneth

[RixtronixLAB]

Hi Kenneth,

I've found that function at ant_state_indicator.c

on this case :

  case EVENT_CHANNEL_CLOSED:
                    NRF_LOG_INFO("EVENT_CHANNEL_CLOSED...\r\n");
                    nrf_pwr_mgmt_shutdown(NRF_PWR_MGMT_SHUTDOWN_GOTO_SYSOFF); //default

I never that get "case",

and I have put at E:\nRF5_SDK_17.0.2_d674dde\components\ant\ant_profiles\ant_hrm\pages\ant_hrm_page_0.c

function :

static void page0_data_log(ant_hrm_page0_data_t const * p_page_data)

err_code = sd_ant_channel_close(HRM_CHANNEL_NUM);

The interrupt from HRM keeps coming and system reset

How can I close it and reopen ?

Thanks

[Kenneth]

You write system reset, the only way the chip will reset is if power is removed, pin reset is pressed or NVIC_SystemReset() is called. I believe the case here is that NVIC_SystemReset() is called, and likely from the app_error_fault_handler(), you should build with DEBUG to find the exact cause.

Kenneth

[RixtronixLAB]

Ok, I will try build and use DEBUG, anyway,

I never got these breakpoints  :

When it's connected on ANT HRM, it keeps running never stop on that breakpoint ?

Any ideas ?

Thanks

[RixtronixLAB]

Hi Kenneth,

When I put DEBUG,

I got this :

                                                                             

nfo> app: Err_code libuarte_init libuarte1 0
                                 

rror> app: SOFTDEVICE: ASSERTION FAILED

What's the cause of "SOFTDEVICE: ASSERTION FAILED" ?

How can we trace it ?

Thanks