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deepsleep: use libopencm3 functions instead of register access

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This commit is contained in:
Thomas Kolb 2021-06-12 01:10:41 +02:00
parent 98d0c08ec3
commit 189ea810d9
2 changed files with 12 additions and 15 deletions
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24
src/deepsleep.c
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@ -6,6 +6,7 @@
#include "clock.h"
#include "deepsleep.h"
#include "libopencm3/stm32/f0/rcc.h"
void init_rtc(void)
{
@ -30,7 +31,7 @@ void init_rtc(void)
/* ?! Stdperiph examples don't turn this on until _afterwards_ which
* simply doesn't work. It must be on at least to be able to
* configure it */
RCC_BDCR |= RCC_BDCR_RTCEN;
rcc_enable_rtc_clock();
pwr_enable_backup_domain_write_protect();
@ -43,13 +44,12 @@ void init_rtc(void)
static void unlock_rtc_access(void)
{
pwr_disable_backup_domain_write_protect();
RTC_WPR = 0xCA;
RTC_WPR = 0x53;
rtc_unlock();
}
static void lock_rtc_access(void)
{
RTC_WPR = 0xFF;
rtc_lock();
pwr_enable_backup_domain_write_protect();
}
@ -61,12 +61,8 @@ void deepsleep(uint32_t duration_secs)
unlock_rtc_access();
// enter initialization mode
RTC_ISR |= RTC_ISR_INIT;
// wait until initialization mode has been entered
while((RTC_ISR & RTC_ISR_INITF) != RTC_ISR_INITF) {
// do nothing
}
rtc_set_init_flag();
rtc_wait_for_init_ready();
RTC_TR = 0; // 00:00:00
RTC_DR = // friday, 01.01.16
@ -116,20 +112,20 @@ void deepsleep(uint32_t duration_secs)
RTC_CR |= RTC_CR_ALRAE | RTC_CR_ALRAIE;
// leave initialization mode
RTC_ISR &= ~RTC_ISR_INIT;
rtc_clear_init_flag();
// lock registers again (using invalid key)
lock_rtc_access();
// enter deep sleep mode
SCB_SCR |= SCB_SCR_SLEEPDEEP;
PWR_CR |= PWR_CR_LPDS; // voltage regulator low-power mode
pwr_voltage_regulator_low_power_in_stop();
pwr_set_stop_mode();
__WFI();
SCB_SCR &= ~SCB_SCR_SLEEPDEEP; // no deepsleep except in this function
rcc_periph_clock_disable(RCC_PWR); // no longer needed
rcc_osc_off(RCC_LSI);
//rcc_periph_clock_disable(RCC_PWR); // no longer needed
//rcc_osc_off(RCC_LSI);
init_clock(); // ensure that all clocks are running again
}

3
src/main.c
View file

@ -223,8 +223,9 @@ int main(void)
} else {
// charge control already idle
if((timebase_ms - charge_control_idle_since) > DEEPSLEEP_DELAY) {
rs485_enqueue("PWR:DEEPSLEEP");
rs485_enqueue("PWR:DEEPSLEEP:ENTRY\n");
deepsleep(DEEPSLEEP_DURATION);
rs485_enqueue("PWR:DEEPSLEEP:EXIT\n");
charge_control_was_idle = false;
}
}