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

[RixtronixLAB]

I see this :

ANT interrupt latency.pdf

It crashed between ANT radio interrupt and GPS UART interrupt,

do you have an idea on how to debug it ? So I can give a good interrupt timing between these two devices ? thanks

[RixtronixLAB]

when I step it on UART callback, it crashed at :

volatile uint8_t line_buffer_GPS[255]; // Holding buffer with space for terminating NUL originally
uint8_t        rxBuffer[255]

memcpy((void *)line_buffer_GPS, GPS.rxBuffer, GPS.rxIndex); //originally 14 Dec 2021 Rixtronix LAB

How do you reckon what's wrong ?

[RixtronixLAB]

It crashed when ANT HRM run together, how do you reckon rectifying it ?

In which function I can make flag so libuarte can work together with ANT HRM ?

[RixtronixLAB]

if I increase the libuarte baud rate to 38400, do you think, it will rectify the issue ? thanks

[RixtronixLAB]

Hi Kenneth,

I'm not using ANT HRM at all, only GPS,

I got this :

<error> app: ERROR 0 [NRF_SUCCESS] at ..\..\..\..\..\..\..\..\components\librari

\libuarte\nrf_libuarte_async.c:230
                                           

 at: 0x00049733

How do you reckon rectifying it ?

is my process too long ? It's 600 lines GPS processing, and it's called on the main();

my callback on event :

case NRF_LIBUARTE_ASYNC_EVT_RX_DATA:
				
				   GPS_CallBack(); //originally on 1 Dec 21 Rixtronix LAB
				
				   //Rixtronix LAB 7 December 2021 
				
            break;
            
            call back function : 
GPS.LastTime=nrf_systick_val_get(); //originally
	 
	//DEBUG
	
	if(GPS.rxIndex < sizeof(GPS.rxBuffer)-2)
	{
		GPS.rxBuffer[GPS.rxIndex] = GPS.rxTmp; //originally
		 
		GPS.rxIndex++;
		memcpy((uint8_t *)line_buffer_GPS,(uint8_t *)GPS.rxBuffer, GPS.rxIndex); //experiment with uint8_t *
			
	}
   nrf_libuarte_async_rx_free(&libuarte1, (uint8_t *)&GPS.rxTmp, 1); //originally        

uint8_t        rxBuffer[255]; ----> should I increase or decrease ?

GPS baudrate = 38400, I made to 115200, straight away error...

Any clues ?

Thanks