App timer problem in nRF 52832 bootloader

[Daniel]

Hello,

I am working with the latest version of nRF52 SDK 13.0.0, when I was implementing my own bootloader application, I tried to start an app timer in my code to invert BSP_BOARD_LED_0. The initialization of lfclk and app timer was successful but I didn't observer that the LED_0 inverted. I upload my project below. I guess that the clock configuration is wrong? The hardware environment is nRF52 DK.

Thanks.

bootloader_user.zip

[bjorn-spockeli]

Hi Daniel,

you have to set the APP_TIMER_CONFIG_USE_SCHEDULER in sdk_config.h to 0, i.e.

#ifndef APP_TIMER_CONFIG_USE_SCHEDULER
#define APP_TIMER_CONFIG_USE_SCHEDULER 0
#endif

If you want to use the scheduler, then you have to define

#define SCHED_MAX_EVENT_DATA_SIZE       MAX(APP_TIMER_SCHED_EVENT_DATA_SIZE, 0)                
#define SCHED_QUEUE_SIZE                20           

and initialize the scheduler in main()

APP_SCHED_INIT(SCHED_MAX_EVENT_DATA_SIZE, SCHED_QUEUE_SIZE);

and call app_sched_execute() in the infinite while loop, i.e.

while(1)
{   
    app_sched_execute();
}

Best regards

Bjørn

[Daniel]

Thanks, it works!