RIOT-OS/RIOT
RIOT-OS/RIOT
1
0
Fork 0
mirror of https://github.com/RIOT-OS/RIOT.git synced 2024-12-29 04:50:03 +01:00
Code Releases Activity

cpu/sam0_common/rt%: issue READREQUEST to access CLOCK/COUNT regs

Browse Source 
read-synchronized register will stall immediatly when read, instead
issue READREQUEST and wait for sync to be unset.
This commit is contained in:
Francisco Molina 2020-06-17 10:45:23 +02:00
parent 1992f57765
commit bdda25c534
No known key found for this signature in database
GPG Key ID: 3E94EAC3DBDEEDA8
2 changed files with 18 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
cpu/sam0_common/periph/rtc.c
View File

@ -52,6 +52,14 @@ static void _wait_syncbusy(void)
#endif
}
static void _rtt_read_req(void)
{
#ifdef RTC_READREQ_RREQ
RTC->MODE0.READREQ.reg = RTC_READREQ_RREQ;
_wait_syncbusy();
#endif
}
static inline void _rtc_set_enabled(bool on)
{
#ifdef REG_RTC_MODE2_CTRLA
@ -145,6 +153,7 @@ int rtc_get_time(struct tm *time)
RTC_MODE2_CLOCK_Type clock;
/* Read register in one time */
_rtt_read_req();
clock.reg = RTC->MODE2.CLOCK.reg;
time->tm_year = clock.bit.YEAR + reference_year;

9
cpu/sam0_common/periph/rtt.c
View File

@ -51,6 +51,14 @@ static void _wait_syncbusy(void)
#endif
}
static void _rtt_read_req(void)
{
#ifdef RTC_READREQ_RREQ
RTC->MODE0.READREQ.reg = RTC_READREQ_RREQ;
_wait_syncbusy();
#endif
}
static inline void _rtt_reset(void)
{
#ifdef RTC_MODE0_CTRL_SWRST
@ -136,6 +144,7 @@ void rtt_clear_overflow_cb(void)
uint32_t rtt_get_counter(void)
{
_wait_syncbusy();
_rtt_read_req();
return RTC->MODE0.COUNT.reg;
}