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Diffstat (limited to 'ports/stm32/rtc.c')
-rw-r--r--ports/stm32/rtc.c55
1 files changed, 48 insertions, 7 deletions
diff --git a/ports/stm32/rtc.c b/ports/stm32/rtc.c
index 8dadc4a88d..b90d17149b 100644
--- a/ports/stm32/rtc.c
+++ b/ports/stm32/rtc.c
@@ -100,6 +100,10 @@ static bool rtc_need_init_finalise = false;
#define RCC_BDCR_LSEBYP RCC_CSR_LSEBYP
#endif
+#if defined(STM32N6)
+#define RCC_DBP_TIMEOUT_VALUE (5)
+#endif
+
void rtc_init_start(bool force_init) {
// Enable the RTC APB bus clock, to communicate with the RTC.
#if defined(STM32H5)
@@ -129,6 +133,32 @@ void rtc_init_start(bool force_init) {
if (!force_init) {
bool rtc_running = false;
+ #if defined(STM32N6)
+ if (LL_RCC_IsEnabledRTC()
+ && LL_RCC_GetRTCClockSource() == LL_RCC_RTC_CLKSOURCE_LSE
+ && LL_RCC_LSE_IsReady()) {
+ // LSE is enabled & ready --> no need to (re-)init RTC
+ rtc_running = true;
+ // remove Backup Domain write protection
+ HAL_PWR_EnableBkUpAccess();
+ // Clear source Reset Flag
+ __HAL_RCC_CLEAR_RESET_FLAGS();
+ // provide some status information
+ rtc_info |= 0x40000;
+ } else if (LL_RCC_IsEnabledRTC()
+ && LL_RCC_GetRTCClockSource() == LL_RCC_RTC_CLKSOURCE_LSI) {
+ // LSI configured as the RTC clock source --> no need to (re-)init RTC
+ rtc_running = true;
+ // remove Backup Domain write protection
+ HAL_PWR_EnableBkUpAccess();
+ // Clear source Reset Flag
+ __HAL_RCC_CLEAR_RESET_FLAGS();
+ // Turn the LSI on (it may need this even if the RTC is running)
+ LL_RCC_LSI_Enable();
+ // provide some status information
+ rtc_info |= 0x80000;
+ }
+ #else
uint32_t bdcr = RCC->BDCR;
if ((bdcr & (RCC_BDCR_RTCEN | RCC_BDCR_RTCSEL | RCC_BDCR_LSEON | RCC_BDCR_LSERDY))
== (RCC_BDCR_RTCEN | RCC_BDCR_RTCSEL_0 | RCC_BDCR_LSEON | RCC_BDCR_LSERDY)) {
@@ -157,6 +187,7 @@ void rtc_init_start(bool force_init) {
// provide some status information
rtc_info |= 0x80000;
}
+ #endif
if (rtc_running) {
// Provide information about the registers that indicated the RTC is running.
@@ -296,7 +327,7 @@ static HAL_StatusTypeDef PYB_RCC_OscConfig(RCC_OscInitTypeDef *RCC_OscInitStruct
return HAL_TIMEOUT;
}
}
- #elif defined(STM32H5)
+ #elif defined(STM32H5) || defined(STM32N6)
// Wait for Backup domain Write protection disable
while (!LL_PWR_IsEnabledBkUpAccess()) {
if (HAL_GetTick() - tickstart > RCC_DBP_TIMEOUT_VALUE) {
@@ -381,7 +412,7 @@ static HAL_StatusTypeDef PYB_RTC_Init(RTC_HandleTypeDef *hrtc) {
#elif defined(STM32F7)
hrtc->Instance->OR &= (uint32_t) ~RTC_OR_ALARMTYPE;
hrtc->Instance->OR |= (uint32_t)(hrtc->Init.OutPutType);
- #elif defined(STM32G0) || defined(STM32G4) || defined(STM32H5) || defined(STM32WL)
+ #elif defined(STM32G0) || defined(STM32G4) || defined(STM32H5) || defined(STM32N6) || defined(STM32WL)
hrtc->Instance->CR &= (uint32_t) ~RTC_CR_TAMPALRM_TYPE_Msk;
hrtc->Instance->CR |= (uint32_t)(hrtc->Init.OutPutType);
#else
@@ -413,7 +444,14 @@ static void PYB_RTC_MspInit_Kick(RTC_HandleTypeDef *hrtc, bool rtc_use_lse, bool
RCC_OscInitTypeDef RCC_OscInitStruct;
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_LSI | RCC_OSCILLATORTYPE_LSE;
+ #if defined(STM32N6)
+ RCC_OscInitStruct.PLL1.PLLState = RCC_PLL_NONE;
+ RCC_OscInitStruct.PLL2.PLLState = RCC_PLL_NONE;
+ RCC_OscInitStruct.PLL3.PLLState = RCC_PLL_NONE;
+ RCC_OscInitStruct.PLL4.PLLState = RCC_PLL_NONE;
+ #else
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE;
+ #endif
#if MICROPY_HW_RTC_USE_BYPASS
if (rtc_use_byp) {
RCC_OscInitStruct.LSEState = RCC_LSE_BYPASS;
@@ -651,6 +689,8 @@ MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(pyb_rtc_datetime_obj, 1, 2, pyb_rtc_datetime
#define RTC_WKUP_IRQn RTC_IRQn
#elif defined(STM32G0)
#define RTC_WKUP_IRQn RTC_TAMP_IRQn
+#elif defined(STM32N6)
+#define RTC_WKUP_IRQn RTC_S_IRQn
#endif
// wakeup(None)
@@ -759,8 +799,9 @@ mp_obj_t pyb_rtc_wakeup(size_t n_args, const mp_obj_t *args) {
#if defined(STM32G0) || defined(STM32G4) || defined(STM32L4) || defined(STM32WB) || defined(STM32WL)
EXTI->IMR1 |= 1 << EXTI_RTC_WAKEUP;
EXTI->RTSR1 |= 1 << EXTI_RTC_WAKEUP;
- #elif defined(STM32H5)
+ #elif defined(STM32H5) || defined(STM32N6)
EXTI->IMR1 |= 1 << EXTI_RTC_WAKEUP;
+ EXTI->RTSR1 |= 1 << EXTI_RTC_WAKEUP;
#elif defined(STM32H7)
EXTI_D1->IMR1 |= 1 << EXTI_RTC_WAKEUP;
EXTI->RTSR1 |= 1 << EXTI_RTC_WAKEUP;
@@ -772,8 +813,8 @@ mp_obj_t pyb_rtc_wakeup(size_t n_args, const mp_obj_t *args) {
// clear interrupt flags
#if defined(STM32G0) || defined(STM32G4) || defined(STM32WL)
RTC->ICSR &= ~RTC_ICSR_WUTWF;
- #elif defined(STM32H5)
- RTC->SCR = RTC_SCR_CWUTF;
+ #elif defined(STM32H5) || defined(STM32N6)
+ LL_RTC_ClearFlag_WUT(RTC);
#elif defined(STM32H7A3xx) || defined(STM32H7A3xxQ) || defined(STM32H7B3xx) || defined(STM32H7B3xxQ)
RTC->SR &= ~RTC_SR_WUTF;
#else
@@ -783,7 +824,7 @@ mp_obj_t pyb_rtc_wakeup(size_t n_args, const mp_obj_t *args) {
EXTI->PR1 = 1 << EXTI_RTC_WAKEUP;
#elif defined(STM32H7)
EXTI_D1->PR1 = 1 << EXTI_RTC_WAKEUP;
- #elif defined(STM32G0) || defined(STM32H5)
+ #elif defined(STM32G0) || defined(STM32H5) || defined(STM32N6)
// Do nothing
#else
EXTI->PR = 1 << EXTI_RTC_WAKEUP;
@@ -799,7 +840,7 @@ mp_obj_t pyb_rtc_wakeup(size_t n_args, const mp_obj_t *args) {
RTC->WPR = 0xff;
// disable external interrupts on line EXTI_RTC_WAKEUP
- #if defined(STM32G0) || defined(STM32G4) || defined(STM32H5) || defined(STM32L4) || defined(STM32WB) || defined(STM32WL)
+ #if defined(STM32G0) || defined(STM32G4) || defined(STM32H5) || defined(STM32L4) || defined(STM32N6) || defined(STM32WB) || defined(STM32WL)
EXTI->IMR1 &= ~(1 << EXTI_RTC_WAKEUP);
#elif defined(STM32H7)
EXTI_D1->IMR1 |= 1 << EXTI_RTC_WAKEUP;
generated by cgit v1.2.3 (git 2.39.1) at 2025-07-10 11:29:47 +0000