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enable NRFX RTC adafruit/circuitpython#1046

This commit is contained in:
Nick Moore 2019-02-07 23:50:14 +11:00
parent 69cf33e6a1
commit b09d2c3c62
4 changed files with 30 additions and 4 deletions
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1
ports/nrf/Makefile
View File

@ -140,6 +140,7 @@ SRC_NRFX = $(addprefix nrfx/,\
drivers/src/nrfx_twim.c \
drivers/src/nrfx_uarte.c \
drivers/src/nrfx_gpiote.c \
drivers/src/nrfx_rtc.c \
)
ifdef EXTERNAL_FLASH_DEVICES

28
ports/nrf/common-hal/rtc/RTC.c
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@ -33,24 +33,44 @@
#include "supervisor/shared/translate.h"
#include "nrfx_rtc.h"
#include "nrf_clock.h"
static uint32_t _rtc_seconds = 0;
#define RTC_CLOCK_HZ (8)
static uint32_t rtc_offset = 0;
const nrfx_rtc_t rtc_instance = NRFX_RTC_INSTANCE(0);
const nrfx_rtc_config_t rtc_config = {
.prescaler = RTC_FREQ_TO_PRESCALER(RTC_CLOCK_HZ),
.reliable = 0,
.tick_latency = 0,
.interrupt_priority = 6
};
void rtc_handler(nrfx_rtc_int_type_t int_type) {
// do nothing
}
void rtc_init(void) {
if (!nrf_clock_lf_is_running()) {
nrf_clock_task_trigger(NRF_CLOCK_TASK_LFCLKSTART);
}
nrfx_rtc_counter_clear(&rtc_instance);
nrfx_rtc_init(&rtc_instance, &rtc_config, rtc_handler);
nrfx_rtc_enable(&rtc_instance);
}
void common_hal_rtc_get_time(timeutils_struct_time_t *tm) {
timeutils_seconds_since_2000_to_struct_time(_rtc_seconds, tm);
uint32_t t = rtc_offset + (nrfx_rtc_counter_get(&rtc_instance) / RTC_CLOCK_HZ );
timeutils_seconds_since_2000_to_struct_time(t, tm);
}
void common_hal_rtc_set_time(timeutils_struct_time_t *tm) {
_rtc_seconds = timeutils_seconds_since_2000(
rtc_offset = timeutils_seconds_since_2000(
tm->tm_year, tm->tm_mon, tm->tm_mday, tm->tm_hour, tm->tm_min, tm->tm_sec
);
nrfx_rtc_counter_clear(&rtc_instance);
}
// A positive value speeds up the clock by removing clock cycles.

3
ports/nrf/nrfx_config.h
View File

@ -70,6 +70,9 @@
#define NRFX_PWM3_ENABLED 0
#endif
#define NRFX_RTC_ENABLED 1
#define NRFX_RTC0_ENABLED 1
// TIMERS
#define NRFX_TIMER_ENABLED 1
// Don't enable TIMER0: it's used by the SoftDevice.

2
shared-bindings/rtc/RTC.c
View File

@ -36,6 +36,7 @@
#include "shared-bindings/time/__init__.h"
#include "supervisor/shared/translate.h"
/*
void MP_WEAK common_hal_rtc_get_time(timeutils_struct_time_t *tm) {
mp_raise_NotImplementedError(translate("RTC is not supported on this board"));
}
@ -51,6 +52,7 @@ int MP_WEAK common_hal_rtc_get_calibration(void) {
void MP_WEAK common_hal_rtc_set_calibration(int calibration) {
mp_raise_NotImplementedError(translate("RTC calibration is not supported on this board"));
}
*/
const rtc_rtc_obj_t rtc_rtc_obj = {{&rtc_rtc_type}};