ANT HRM interrupt and sdcard ?

[RixtronixLAB]

Dear Members,

I want to log my ANT+ HRM into SDcard,
I tried with flag, but it never goes to main loop,

I'm using nRF52840
Code ANT HRM interrupt :

void ant_hrm_page_0_decode(uint8_t const        * p_page_buffer,
                           ant_hrm_page0_data_t * p_page_data)

//set flag for SDCARD writing 1 December 2021 Rixtronix LAB  
   SDCARD_Flag=1; 

on the main loop :

//wait for SDCARD_FLAG=1
       if (SDCARD_Flag==1)
       {
          printf("\rWRITE SDCARD.. \r\n"); 
          SDCA

I'm using softdevice S340, how can I send a flag in softdevice, than the flag will be processed in main loop ?

Thanks

[Jørgen Holmefjord]

Hi,

How is the flag defined?

Have you verified if ant_hrm_page_0_decode() is called and the flag being set (for instance through debugging/breakpoints)?

Is your application stuck in some interrupt, preventing it from going back to the main-loop?

Best regards,
Jørgen

[RixtronixLAB]

Hi Jorgen, thanks for the reply,

Here's what I've done for debugging ANT, 340 softdevice and nRF52840 :

1.I put breakpoint at SDCARD_Flag=1 at  void page0_data_log function, ant_hrm_page0.c
2.Run to cursor after SDCARD_flag=1;
3.it goes to NRF_BREAKPOINT_COND: , Line 100 app_error_weak.c
4.then it runs to line 104
 NRF_LOG_WARNING("System reset");
    NVIC_SystemReset();
    

it never returns to main() loop..
    How can I rectify this ? How can I halt interrupt for a while from ANT sensor, write to SDcard then turn the interrupt back on ?

Thanks

[RixtronixLAB]

Can it be like this ?

SDK 17.1.0: is the "Need to close the ANT channel to make it safe to write to flash" warning still valid?

https://devzone.nordicsemi.com/f/nordic-q-a/81707/sdk-17-1-0-is-the-need-to-close-the-ant-channel-to-make-it-safe-to-write-to-flash-warning-still-valid/339086#339086

[Jørgen Holmefjord]

If you put a breakpoint and single-step the code, the softdevice will likely assert once you continue execution.

If you want to put breakpoints, you can look into J-Link Monitor mode debugging.

Looks like the note regarding ANT and flash writes is still valid, yes.