I have been developing an application using PCA10028 board which needs to use timer. From the SDK8.0.0 pack, I found an example "timer_pca10028". It works fine when the SD is not at present.
Then I used part of the code inside my own application to try the timer. In my case, I used the SD. Thus the #define TIMER1_ENABLED 1 is applied in the "nrf_drv_config.h". Below is my code snippet:
const nrf_drv_timer_t STREAM_PAC = NRF_DRV_TIMER_INSTANCE(1);
void timer_stream_event_handler (nrf_timer_events_t event_type)
{
uint8_t i;
uint32_t err_code;
switch(event_type)
{
case NRF_TIMER_EVENTS_COMPARE1:
AppTask(); //my staff to work here
break;
default:
//Do nothing.
break;
}
}
int main (void)
{
uint32_t time_ms = 50; //Time(in miliseconds) between consecutive compare events.
uint32_t time_ticks;
uint32_t err_code;
err_code = nrf_drv_timer_init(&STREAM_PAC, NULL, timer_stream_event_handler);
APP_ERROR_CHECK(err_code);
time_ticks = nrf_drv_timer_ms_to_ticks(&STREAM_PAC, time_ms);
nrf_drv_timer_extended_compare(&STREAM_PAC, NRF_TIMER_CC_CHANNEL1, time_ticks, NRF_TIMER_SHORTS_COMPARE1_CLEAR_MASK, true);
nrf_drv_timer_enable(&STREAM_PAC);
while (1)
{
power_manage();
}
}
This is part of my main function. In real case, it also contains app_timer used by bsp.h to control LED. But this part is the last function I called before entering the main loop. Generally, the differences compared to timer_pca10028 examples are SD at present and timer1 is enabled. But when I did this, the stream_event_handler is getting called constantly instead of after the timer interval I setup inside the main function. When I change the time_ms, the time interval did not change any.
Could anyone give some suggestions on this issue? Thanks in advance!
