feat: ll rtc alarm wakeup

Examples/LL/ADC/ADC_InternalTemperature/main.c

@@ -17,7 +17,7 @@ static void APP_ADCConfig(void);
 int main(void)
 {
   // Set system clock to 48MHz
-  BSP_HSI_PLL_48MConfig();
+  BSP_RCC_HSI_PLL48MConfig();
   // Initialize UART on PA2:TX PA3:RX
   BSP_USART_Config(115200);
   printf("PY32F0 Internal Temperature Sensor Demo\r\nClock: %ld\r\n", SystemCoreClock);

Examples/LL/ADC/ADC_SingleConversion_TriggerTimer_DMA/main.c

@@ -14,7 +14,7 @@ static void APP_DMAConfig(void);
 
 int main(void)
 {
-  BSP_HSI_PLL_48MConfig();
+  BSP_RCC_HSI_PLL48MConfig();
 
   BSP_USART_Config(115200);
   printf("ADC Timer Trigger DMA Demo\r\nClock: %ld\r\n", SystemCoreClock);

Examples/LL/CRC/CRC_Calculate/main.c

@@ -35,7 +35,7 @@ int main(void)
 {
   uint32_t index, crc;
   // Set system clock to 48MHz
-  BSP_HSI_PLL_48MConfig();
+  BSP_RCC_HSI_PLL48MConfig();
   // Initialize UART on PA2:TX PA3:RX
   BSP_USART_Config(115200);
   printf("PY32F0 CRC Demo\r\nClock: %ld\r\n", SystemCoreClock);

Examples/LL/Flash/SectorEraseAndWrite/main.c

@@ -24,7 +24,7 @@ static void APP_FlashWriteVerify(void);
 
 int main(void)
 {
-  BSP_HSI_PLL_48MConfig();
+  BSP_RCC_HSI_PLL48MConfig();
 
   BSP_USART_Config(115200);
   printf("Flash Read&Write Demo\r\nClock: %ld\r\n", SystemCoreClock);

Examples/LL/RTC/Alarm_Wakeup/main.c

@@ -0,0 +1,156 @@
+/**
+ * Demo of wakeup by RTC alarm
+*/
+#include "main.h"
+#include "py32f0xx_bsp_clock.h"
+#include "py32f0xx_bsp_printf.h"
+
+// 0x7FFF = 32,768 - 1
+#define RTC_ASYNCH_PREDIV          ((uint32_t)0x7FFF)
+
+static void APP_GPIO_Config(void);
+static void APP_RTC_Init(void);
+static void APP_RTC_AlarmConfig(void);
+static void APP_RTC_InterruptConfig(void);
+static void APP_EnterStopMode(void);
+
+int main(void)
+{
+  // Set HSI 8MHz as system clock source
+  BSP_RCC_HSI_8MConfig();
+  // Initialize UART on PA2:TX PA3:RX
+  BSP_USART_Config(115200);
+  printf("PY32F0 RTC Wakeup Demo\r\nClock: %ld\r\n", SystemCoreClock);
+
+  APP_GPIO_Config();
+
+  APP_RTC_Init();
+  APP_RTC_InterruptConfig();
+
+  while (1)
+  {
+    LL_RTC_WaitForSynchro(RTC);
+    // Update alarm clock
+    APP_RTC_AlarmConfig();
+
+    printf("Entering stop mode... ");
+    APP_EnterStopMode();
+    printf("wakeup\r\n");
+  }
+}
+
+static void APP_GPIO_Config(void)
+{
+  LL_IOP_GRP1_EnableClock(LL_IOP_GRP1_PERIPH_GPIOB);
+  LL_GPIO_SetPinMode(GPIOB, LL_GPIO_PIN_5, LL_GPIO_MODE_OUTPUT);
+}
+
+static void APP_RTC_Init(void)
+{
+  LL_RTC_InitTypeDef rtc_initstruct;
+  LL_RTC_TimeTypeDef  rtc_time_initstruct;
+
+  LL_APB1_GRP1_EnableClock(LL_APB1_GRP1_PERIPH_PWR);
+
+  LL_PWR_EnableBkUpAccess();
+
+  /* 
+   * Enable LSI and set it as RTC clock source
+  */
+  LL_RCC_LSI_Enable();
+  while (LL_RCC_LSI_IsReady() != 1);
+  if (LL_RCC_GetRTCClockSource() != LL_RCC_RTC_CLKSOURCE_LSI)
+  {
+    LL_RCC_ForceBackupDomainReset();
+    LL_RCC_ReleaseBackupDomainReset();
+    LL_RCC_SetRTCClockSource(LL_RCC_RTC_CLKSOURCE_LSI);
+  }
+
+  // Enable RTC clock and alarm
+  LL_APB1_GRP1_EnableClock(LL_APB1_GRP1_PERIPH_RTC);
+  LL_RCC_EnableRTC();
+
+  if (LL_RTC_DeInit(RTC) != SUCCESS)
+  {
+    printf("error\r\n");
+  }
+  rtc_initstruct.AsynchPrescaler = RTC_ASYNCH_PREDIV;
+  rtc_initstruct.OutPutSource = LL_RTC_CALIB_OUTPUT_NONE;
+  if (LL_RTC_Init(RTC, &rtc_initstruct) != SUCCESS)
+  {
+    printf("error\r\n");
+  }
+
+  // Time = 11:59:35
+  rtc_time_initstruct.Hours      =11;
+  rtc_time_initstruct.Minutes    =59;
+  rtc_time_initstruct.Seconds    =35;
+  if (LL_RTC_TIME_Init(RTC, LL_RTC_FORMAT_BIN, &rtc_time_initstruct) != SUCCESS)
+  {
+    printf("error\r\n");
+  }
+}
+
+static void APP_RTC_AlarmConfig(void)
+{
+  uint32_t ts;
+  LL_RTC_AlarmTypeDef rtc_alarm_initstruct;
+
+  ts = LL_RTC_TIME_Get(RTC) + 2;
+  rtc_alarm_initstruct.AlarmTime.Hours      = ts/3600;
+  rtc_alarm_initstruct.AlarmTime.Minutes    = (ts % 3600) / 60;
+  rtc_alarm_initstruct.AlarmTime.Seconds    = (ts % 3600) % 60;
+  if (LL_RTC_ALARM_Init(RTC, LL_RTC_FORMAT_BIN, &rtc_alarm_initstruct) != SUCCESS)   
+  {
+    printf("error\r\n");
+  }
+
+  if (LL_RTC_ExitInitMode(RTC) != SUCCESS)   
+  {
+    printf("error\r\n");
+  }
+}
+
+static void APP_RTC_InterruptConfig(void)
+{
+  LL_RTC_DisableWriteProtection(RTC);
+  // Clear alarm interrupt flag
+  LL_RTC_ClearFlag_ALR(RTC);
+  // Enable Alarm interrupt
+  LL_RTC_EnableIT_ALR(RTC);
+  LL_RTC_EnableWriteProtection(RTC);
+
+  NVIC_SetPriority(RTC_IRQn, 0x00);
+  NVIC_EnableIRQ(RTC_IRQn);
+
+  LL_EXTI_EnableIT(LL_EXTI_LINE_19);
+}
+
+static void APP_EnterStopMode(void)
+{
+  LL_APB1_GRP1_EnableClock(LL_APB1_GRP1_PERIPH_PWR);
+  LL_LPM_EnableDeepSleep();
+  __WFI();
+}
+
+void RTC_IRQHandler(void)
+{
+  if (LL_RTC_IsActiveFlag_ALR(RTC))
+  {
+    LL_GPIO_TogglePin(GPIOB,LL_GPIO_PIN_5);
+    LL_RTC_ClearFlag_ALR(RTC);
+  }
+}
+
+
+void APP_ErrorHandler(void)
+{
+  while (1);
+}
+
+#ifdef  USE_FULL_ASSERT
+void assert_failed(uint8_t *file, uint32_t line)
+{
+  while (1);
+}
+#endif /* USE_FULL_ASSERT */

Examples/LL/RTC/Alarm_Wakeup/main.h

@@ -0,0 +1,27 @@
+#ifndef __MAIN_H
+#define __MAIN_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include "py32f0xx_ll_rtc.h"
+#include "py32f0xx_ll_bus.h"
+#include "py32f0xx_ll_cortex.h"
+#include "py32f0xx_ll_dma.h"
+#include "py32f0xx_ll_exti.h"
+#include "py32f0xx_ll_gpio.h"
+#include "py32f0xx_ll_pwr.h"
+#include "py32f0xx_ll_rcc.h"
+#include "py32f0xx_ll_system.h"
+#include "py32f0xx_ll_tim.h"
+#include "py32f0xx_ll_utils.h"
+
+
+void APP_ErrorHandler(void);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __MAIN_H */

Examples/LL/RTC/Alarm_Wakeup/py32f0xx_it.c

@@ -0,0 +1,42 @@
+#include "main.h"
+#include "py32f0xx_it.h"
+
+extern void APP_TransferCompleteCallback(void);
+
+/**
+  * @brief This function handles Non maskable interrupt.
+  */
+void NMI_Handler(void)
+{
+}
+
+/**
+  * @brief This function handles Hard fault interrupt.
+  */
+void HardFault_Handler(void)
+{
+  while (1)
+  {
+  }
+}
+
+/**
+  * @brief This function handles System service call via SWI instruction.
+  */
+void SVC_Handler(void)
+{
+}
+
+/**
+  * @brief This function handles Pendable request for system service.
+  */
+void PendSV_Handler(void)
+{
+}
+
+/**
+  * @brief This function handles System tick timer.
+  */
+void SysTick_Handler(void)
+{
+}

Examples/LL/RTC/Alarm_Wakeup/py32f0xx_it.h

@@ -0,0 +1,18 @@
+#ifndef __PY32F0XX_IT_H
+#define __PY32F0XX_IT_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+void NMI_Handler(void);
+void HardFault_Handler(void);
+void SVC_Handler(void);
+void PendSV_Handler(void);
+void SysTick_Handler(void);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __PY32F0XX_IT_H */

Examples/LL/RTC/LSI_Alarm/main.c

@@ -14,7 +14,7 @@ static void APP_RTC_InterruptConfig(void);
 int main(void)
 {
   // Set system clock to 48MHz
-  BSP_HSI_PLL_48MConfig();
+  BSP_RCC_HSI_PLL48MConfig();
   // Initialize UART on PA2:TX PA3:RX
   BSP_USART_Config(115200);
   printf("PY32F0 RTC Demo\r\nClock: %ld\r\n", SystemCoreClock);

Libraries/BSP_LL/Inc/py32f0xx_bsp_clock.h

@@ -24,10 +24,11 @@ extern "C" {
 #include "py32f0xx_ll_gpio.h"
 #include "py32f0xx_ll_usart.h"
 
-void BSP_HSI_PLL_48MConfig(void);
+void BSP_RCC_HSI_PLL48MConfig(void);
-void BSP_HSI_24MConfig(void);
+void BSP_RCC_HSI_24MConfig(void);
-void BSP_HSE_PLL_Config(void);
+void BSP_RCC_HSI_8MConfig(void);
-void BSP_HSE_Config(void);
+void BSP_RCC_HSE_PLLConfig(void);
+void BSP_RCC_HSE_Config(void);
 
 #ifdef __cplusplus
 }

Libraries/BSP_LL/Src/py32f0xx_bsp_clock.c

@@ -1,6 +1,6 @@
 #include "py32f0xx_bsp_clock.h"
 
-void BSP_HSI_PLL_48MConfig(void)
+void BSP_RCC_HSI_PLL48MConfig(void)
 {
   LL_UTILS_ClkInitTypeDef UTILS_ClkInitStruct;
 
@@ -17,7 +17,7 @@ void BSP_HSI_PLL_48MConfig(void)
   LL_Init1msTick(48000000);
 }
 
-void BSP_HSI_24MConfig(void)
+void BSP_RCC_HSI_24MConfig(void)
 {
   LL_RCC_HSI_Enable();
   LL_RCC_HSI_SetCalibFreq(LL_RCC_HSICALIBRATION_24MHz);
@@ -37,7 +37,22 @@ void BSP_HSI_24MConfig(void)
   LL_Init1msTick(24000000);
 }
 
-void BSP_HSE_PLL_Config(void)
+void BSP_RCC_HSI_8MConfig(void)
+{
+  LL_RCC_HSI_Enable();
+  while(LL_RCC_HSI_IsReady() != 1);
+
+  LL_RCC_SetAHBPrescaler(LL_RCC_SYSCLK_DIV_1);
+
+  LL_RCC_SetSysClkSource(LL_RCC_SYS_CLKSOURCE_HSISYS);
+  while(LL_RCC_GetSysClkSource() != LL_RCC_SYS_CLKSOURCE_STATUS_HSISYS);
+
+  LL_RCC_SetAPB1Prescaler(LL_RCC_APB1_DIV_1);
+  LL_SetSystemCoreClock(8000000);
+  LL_Init1msTick(8000000);
+}
+
+void BSP_RCC_HSE_PLLConfig(void)
 {
   LL_UTILS_ClkInitTypeDef UTILS_ClkInitStruct;
 
@@ -52,7 +67,7 @@ void BSP_HSE_PLL_Config(void)
   LL_Init1msTick(HSE_VALUE * 2);
 }
 
-void BSP_HSE_Config(void)
+void BSP_RCC_HSE_Config(void)
 {
   LL_RCC_HSE_Enable();
   LL_RCC_HSE_SetFreqRegion(LL_RCC_HSE_16_32MHz);