Question for or1k_timer_set_mode in or1k-support.h #17
Description
hi, Dear expert:
I follow the steps in https://openrisc.io/newlib/building.html to build my own or1k toolchains.
Now I am trying to use timerrelated functions in $OR1K_ELF/or1k-elf/include/or1k-support.h.
I first start with the example at line 446 in or1k-support.h
void tick_handler(void) {
// Make schedule decision
// and set new thread
or1k_timer_reset();
// End of exception, new thread will run
}
int main() {
// Configure operating system and start threads..
// Configure timer
or1k_timer_init(50);
or1k_timer_set_handler(&tick_handler);
or1k_timer_set_mode(SPR_TTMR_SR);
or1k_timer_enable();
// Schedule first thread and die..
}
But the example failed to pass compile because the define SPR_TTMR_SR is missed.
I try to get the answer from the define of or1k_timer_set_mode.
/*!
- Set timer mode
- The timer has different modes (see architecture manual). The default is to
- automatically restart counting (SPR_TTMR_RT), others are single run
- (SPR_TTMR_SR) and continuous run (SPR_TTMR_CR).
- \param mode a valid mode (use definitions from spr-defs.h as it is important
- that those are also at the correct position in the bit field!)
*/
void or1k_timer_set_mode(uint32_t mode);
But I still not clear about the value of mode for simple run and continues run.
Please kindly help.
Thanks.