mirror of
https://github.com/enjoy-digital/litex.git
synced 2025-01-04 09:52:26 -05:00
3f43a49382
changes: -software/bios: remove dataflow -cores/identifier: replace with user-defined string -interconnect/CSRBankArray: support read-only mappings -targets: Added Numato Mimas V2 target -Our libunwind changes were merged upstream. -wishbone: update TODO -replace Counter in Converters -Fix CSRBankArray -flterm: properly exit on ^C.
33 lines
541 B
C
33 lines
541 B
C
#include <generated/csr.h>
|
|
#include <time.h>
|
|
|
|
void time_init(void)
|
|
{
|
|
int t;
|
|
|
|
timer0_en_write(0);
|
|
t = 2*SYSTEM_CLOCK_FREQUENCY;
|
|
timer0_reload_write(t);
|
|
timer0_load_write(t);
|
|
timer0_en_write(1);
|
|
}
|
|
|
|
int elapsed(int *last_event, int period)
|
|
{
|
|
int t, dt;
|
|
|
|
timer0_update_value_write(1);
|
|
t = timer0_reload_read() - timer0_value_read();
|
|
if(period < 0) {
|
|
*last_event = t;
|
|
return 1;
|
|
}
|
|
dt = t - *last_event;
|
|
if(dt < 0)
|
|
dt += timer0_reload_read();
|
|
if((dt > period) || (dt < 0)) {
|
|
*last_event = t;
|
|
return 1;
|
|
} else
|
|
return 0;
|
|
}
|