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cpu/sam0_common: only include RTC/RTT symbols if module is used

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This allows to use the sam0 RTT together with the rtt_rtc module.
The idea is to use RTT as a monotonic counter, but still keep track
of the time with the virtual RTC module.
This commit is contained in:
Benjamin Valentin 2021-01-13 19:07:39 +01:00
parent d806aa42c6
commit 69b16dc8a2
1 changed files with 72 additions and 53 deletions
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125
cpu/sam0_common/periph/rtc_rtt.c
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@ -84,6 +84,7 @@ static void _wait_syncbusy(void)
}
}
#if defined(MODULE_PERIPH_RTC) || defined(MODULE_PERIPH_RTT)
static void _read_req(void)
{
#ifdef RTC_READREQ_RREQ
@ -91,6 +92,7 @@ static void _read_req(void)
_wait_syncbusy();
#endif
}
#endif
static void _poweron(void)
{
@ -111,6 +113,7 @@ static bool _power_is_on(void)
#endif
}
__attribute__((unused))
static void _poweroff(void)
{
#ifdef MCLK
@ -142,6 +145,7 @@ static inline void _rtt_reset(void)
}
#ifdef CPU_COMMON_SAMD21
#ifdef MODULE_PERIPH_RTC
static void _rtc_clock_setup(void)
{
/* Use 1024 Hz GCLK */
@ -150,7 +154,9 @@ static void _rtc_clock_setup(void)
| GCLK_CLKCTRL_ID_RTC;
while (GCLK->STATUS.bit.SYNCBUSY) {}
}
#endif /* MODULE_PERIPH_RTC */
#ifdef MODULE_PERIPH_RTT
static void _rtt_clock_setup(void)
{
/* Use 32 kHz GCLK */
@ -159,9 +165,11 @@ static void _rtt_clock_setup(void)
| GCLK_CLKCTRL_ID_RTC;
while (GCLK->STATUS.bit.SYNCBUSY) {}
}
#endif /* MODULE_PERIPH_RTT */
#else /* CPU_COMMON_SAMD21 - Clock Setup */
#ifdef MODULE_PERIPH_RTC
static void _rtc_clock_setup(void)
{
/* RTC source clock is external oscillator at 1kHz */
@ -182,7 +190,9 @@ static void _rtc_clock_setup(void)
#error "No clock source for RTC selected. "
#endif
}
#endif /* MODULE_PERIPH_RTC */
#if defined(MODULE_PERIPH_RTT) || RTC_NUM_OF_TAMPERS
static void _rtt_clock_setup(void)
{
/* RTC source clock is external oscillator at 32kHz */
@ -202,8 +212,10 @@ static void _rtt_clock_setup(void)
#error "No clock source for RTT selected. "
#endif
}
#endif /* MODULE_PERIPH_RTT */
#endif /* !CPU_COMMON_SAMD21 - Clock Setup */
#ifdef MODULE_PERIPH_RTC
static void _rtc_init(void)
{
#ifdef REG_RTC_MODE2_CTRLA
@ -251,7 +263,9 @@ void rtc_init(void)
NVIC_EnableIRQ(RTC_IRQn);
}
#endif /* MODULE_PERIPH_RTC */
#ifdef MODULE_PERIPH_RTT
void rtt_init(void)
{
_rtt_clock_setup();
@ -277,6 +291,7 @@ void rtt_init(void)
NVIC_EnableIRQ(RTC_IRQn);
}
#endif /* MODULE_PERIPH_RTT */
#if RTC_NUM_OF_TAMPERS
@ -406,43 +421,7 @@ uint8_t rtc_tamper_pin_mask(gpio_t pin)
}
#endif /* RTC_NUM_OF_TAMPERS */
void rtt_set_overflow_cb(rtt_cb_t cb, void *arg)
{
/* clear overflow cb to avoid race while assigning */
rtt_clear_overflow_cb();
/* set callback variables */
overflow_cb.cb = cb;
overflow_cb.arg = arg;
/* enable overflow interrupt */
RTC->MODE0.INTENSET.reg = RTC_MODE0_INTENSET_OVF;
}
void rtt_clear_overflow_cb(void)
{
/* disable overflow interrupt */
RTC->MODE0.INTENCLR.reg = RTC_MODE0_INTENCLR_OVF;
}
uint32_t rtt_get_counter(void)
{
_wait_syncbusy();
_read_req();
return RTC->MODE0.COUNT.reg;
}
void rtt_set_counter(uint32_t count)
{
RTC->MODE0.COUNT.reg = count;
_wait_syncbusy();
}
uint32_t rtt_get_alarm(void)
{
_wait_syncbusy();
return RTC->MODE0.COMP[0].reg;
}
#ifdef MODULE_PERIPH_RTC
int rtc_get_alarm(struct tm *time)
{
RTC_MODE2_ALARM_Type alarm;
@ -545,6 +524,61 @@ int rtc_set_time(struct tm *time)
return 0;
}
void rtc_clear_alarm(void)
{
/* disable alarm interrupt */
RTC->MODE2.INTENCLR.reg = RTC_MODE2_INTENCLR_ALARM0;
}
void rtc_poweron(void)
{
_poweron();
}
void rtc_poweroff(void)
{
_poweroff();
}
#endif /* MODULE_PERIPH_RTC */
#ifdef MODULE_PERIPH_RTT
void rtt_set_overflow_cb(rtt_cb_t cb, void *arg)
{
/* clear overflow cb to avoid race while assigning */
rtt_clear_overflow_cb();
/* set callback variables */
overflow_cb.cb = cb;
overflow_cb.arg = arg;
/* enable overflow interrupt */
RTC->MODE0.INTENSET.reg = RTC_MODE0_INTENSET_OVF;
}
void rtt_clear_overflow_cb(void)
{
/* disable overflow interrupt */
RTC->MODE0.INTENCLR.reg = RTC_MODE0_INTENCLR_OVF;
}
uint32_t rtt_get_counter(void)
{
_wait_syncbusy();
_read_req();
return RTC->MODE0.COUNT.reg;
}
void rtt_set_counter(uint32_t count)
{
RTC->MODE0.COUNT.reg = count;
_wait_syncbusy();
}
uint32_t rtt_get_alarm(void)
{
_wait_syncbusy();
return RTC->MODE0.COMP[0].reg;
}
void rtt_set_alarm(uint32_t alarm, rtt_cb_t cb, void *arg)
{
/* disable interrupt to avoid race */
@ -563,37 +597,22 @@ void rtt_set_alarm(uint32_t alarm, rtt_cb_t cb, void *arg)
RTC->MODE0.INTENSET.reg = RTC_MODE0_INTENSET_CMP0;
}
void rtc_clear_alarm(void)
{
/* disable alarm interrupt */
RTC->MODE2.INTENCLR.reg = RTC_MODE2_INTENCLR_ALARM0;
}
void rtt_clear_alarm(void)
{
/* disable compare interrupt */
RTC->MODE0.INTENCLR.reg = RTC_MODE0_INTENCLR_CMP0;
}
void rtc_poweron(void)
{
_poweron();
}
void rtt_poweron(void)
{
_poweron();
}
void rtc_poweroff(void)
{
_poweroff();
}
void rtt_poweroff(void)
{
_poweroff();
}
#endif /* MODULE_PERIPH_RTT */
static void _isr_rtc(void)
{