Mercurial > ~darius > hgwebdir.cgi > stm32temp
diff libs/STM32F10x_StdPeriph_Lib_V3.5.0/Project/STM32F10x_StdPeriph_Examples/PWR/STOP/main.c @ 0:c59513fd84fb
Initial commit of STM32 test code.
author | Daniel O'Connor <darius@dons.net.au> |
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date | Mon, 03 Oct 2011 21:19:15 +1030 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/libs/STM32F10x_StdPeriph_Lib_V3.5.0/Project/STM32F10x_StdPeriph_Examples/PWR/STOP/main.c Mon Oct 03 21:19:15 2011 +1030 @@ -0,0 +1,304 @@ +/** + ****************************************************************************** + * @file PWR/STOP/main.c + * @author MCD Application Team + * @version V3.5.0 + * @date 08-April-2011 + * @brief Main program body. + ****************************************************************************** + * @attention + * + * THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS + * WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE + * TIME. AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY + * DIRECT, INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING + * FROM THE CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE + * CODING INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS. + * + * <h2><center>© COPYRIGHT 2011 STMicroelectronics</center></h2> + ****************************************************************************** + */ + +/* Includes ------------------------------------------------------------------*/ +#include "stm32f10x.h" +#include "stm32_eval.h" + +/** @addtogroup STM32F10x_StdPeriph_Examples + * @{ + */ + +/** @addtogroup PWR_STOP + * @{ + */ + +/* Private typedef -----------------------------------------------------------*/ +/* Private define ------------------------------------------------------------*/ +/* Private macro -------------------------------------------------------------*/ +/* Private variables ---------------------------------------------------------*/ +extern __IO uint32_t TimingDelay; +ErrorStatus HSEStartUpStatus; + +/* Private function prototypes -----------------------------------------------*/ +void SYSCLKConfig_STOP(void); +void EXTI_Configuration(void); +void RTC_Configuration(void); +void NVIC_Configuration(void); +void SysTick_Configuration(void); +void Delay(__IO uint32_t nTime); + +/* Private functions ---------------------------------------------------------*/ + +/** + * @brief Main program. + * @param None + * @retval None + */ +int main(void) +{ + /*!< At this stage the microcontroller clock setting is already configured, + this is done through SystemInit() function which is called from startup + file (startup_stm32f10x_xx.s) before to branch to application main. + To reconfigure the default setting of SystemInit() function, refer to + system_stm32f10x.c file + */ + + /* Initialize LEDs and Key Button mounted on STM3210X-EVAL board */ + STM_EVAL_LEDInit(LED1); + STM_EVAL_LEDInit(LED2); + STM_EVAL_LEDInit(LED3); + STM_EVAL_PBInit(BUTTON_KEY, BUTTON_MODE_EXTI); + + /* Enable PWR and BKP clock */ + RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR | RCC_APB1Periph_BKP, ENABLE); + + /* Configure EXTI Line to generate an interrupt on falling edge */ + EXTI_Configuration(); + + /* Configure RTC clock source and prescaler */ + RTC_Configuration(); + + /* NVIC configuration */ + NVIC_Configuration(); + + /* Configure the SysTick to generate an interrupt each 1 millisecond */ + SysTick_Configuration(); + + /* Turn on LED1 */ + STM_EVAL_LEDOn(LED1); + + while (1) + { + /* Insert 1.5 second delay */ + Delay(1500); + + /* Wait till RTC Second event occurs */ + RTC_ClearFlag(RTC_FLAG_SEC); + while(RTC_GetFlagStatus(RTC_FLAG_SEC) == RESET); + + /* Alarm in 3 second */ + RTC_SetAlarm(RTC_GetCounter()+ 3); + /* Wait until last write operation on RTC registers has finished */ + RTC_WaitForLastTask(); + + /* Turn off LED1 */ + STM_EVAL_LEDOff(LED1); + + /* Request to enter STOP mode with regulator in low power mode*/ + PWR_EnterSTOPMode(PWR_Regulator_LowPower, PWR_STOPEntry_WFI); + + /* At this stage the system has resumed from STOP mode -------------------*/ + /* Turn on LED1 */ + STM_EVAL_LEDOn(LED1); + + /* Configures system clock after wake-up from STOP: enable HSE, PLL and select + PLL as system clock source (HSE and PLL are disabled in STOP mode) */ + SYSCLKConfig_STOP(); + } +} + +/** + * @brief Configures system clock after wake-up from STOP: enable HSE, PLL + * and select PLL as system clock source. + * @param None + * @retval None + */ +void SYSCLKConfig_STOP(void) +{ + /* Enable HSE */ + RCC_HSEConfig(RCC_HSE_ON); + + /* Wait till HSE is ready */ + HSEStartUpStatus = RCC_WaitForHSEStartUp(); + + if(HSEStartUpStatus == SUCCESS) + { + +#ifdef STM32F10X_CL + /* Enable PLL2 */ + RCC_PLL2Cmd(ENABLE); + + /* Wait till PLL2 is ready */ + while(RCC_GetFlagStatus(RCC_FLAG_PLL2RDY) == RESET) + { + } + +#endif + + /* Enable PLL */ + RCC_PLLCmd(ENABLE); + + /* Wait till PLL is ready */ + while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET) + { + } + + /* Select PLL as system clock source */ + RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK); + + /* Wait till PLL is used as system clock source */ + while(RCC_GetSYSCLKSource() != 0x08) + { + } + } +} + +/** + * @brief Configures EXTI Lines. + * @param None + * @retval None + */ +void EXTI_Configuration(void) +{ + EXTI_InitTypeDef EXTI_InitStructure; + + /* Configure EXTI Line17(RTC Alarm) to generate an interrupt on rising edge */ + EXTI_ClearITPendingBit(EXTI_Line17); + EXTI_InitStructure.EXTI_Line = EXTI_Line17; + EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt; + EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising; + EXTI_InitStructure.EXTI_LineCmd = ENABLE; + EXTI_Init(&EXTI_InitStructure); +} + +/** + * @brief Configures RTC clock source and prescaler. + * @param None + * @retval None + */ +void RTC_Configuration(void) +{ + /* RTC clock source configuration ------------------------------------------*/ + /* Allow access to BKP Domain */ + PWR_BackupAccessCmd(ENABLE); + + /* Reset Backup Domain */ + BKP_DeInit(); + + /* Enable the LSE OSC */ + RCC_LSEConfig(RCC_LSE_ON); + /* Wait till LSE is ready */ + while(RCC_GetFlagStatus(RCC_FLAG_LSERDY) == RESET) + { + } + + /* Select the RTC Clock Source */ + RCC_RTCCLKConfig(RCC_RTCCLKSource_LSE); + + /* Enable the RTC Clock */ + RCC_RTCCLKCmd(ENABLE); + + /* RTC configuration -------------------------------------------------------*/ + /* Wait for RTC APB registers synchronisation */ + RTC_WaitForSynchro(); + + /* Set the RTC time base to 1s */ + RTC_SetPrescaler(32767); + /* Wait until last write operation on RTC registers has finished */ + RTC_WaitForLastTask(); + + /* Enable the RTC Alarm interrupt */ + RTC_ITConfig(RTC_IT_ALR, ENABLE); + /* Wait until last write operation on RTC registers has finished */ + RTC_WaitForLastTask(); +} + +/** + * @brief Configures NVIC and Vector Table base location. + * @param None + * @retval None + */ +void NVIC_Configuration(void) +{ + NVIC_InitTypeDef NVIC_InitStructure; + + /* 2 bits for Preemption Priority and 2 bits for Sub Priority */ + NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2); + + NVIC_InitStructure.NVIC_IRQChannel = RTCAlarm_IRQn; + NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0; + NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0; + NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; + NVIC_Init(&NVIC_InitStructure); +} + +/** + * @brief Configures the SysTick to generate an interrupt each 1 millisecond. + * @param None + * @retval None + */ +void SysTick_Configuration(void) +{ + /* Setup SysTick Timer for 1 msec interrupts */ + if (SysTick_Config(SystemCoreClock / 1000)) + { + /* Capture error */ + while (1); + } + /* Set SysTick Priority to 3 */ + NVIC_SetPriority(SysTick_IRQn, 0x0C); +} + +/** + * @brief Inserts a delay time. + * @param nTime: specifies the delay time length, in milliseconds. + * @retval None + */ +void Delay(__IO uint32_t nTime) +{ + TimingDelay = nTime; + + while(TimingDelay != 0); + +} + +#ifdef USE_FULL_ASSERT + +/** + * @brief Reports the name of the source file and the source line number + * where the assert_param error has occurred. + * @param file: pointer to the source file name + * @param line: assert_param error line source number + * @retval None + */ +void assert_failed(uint8_t* file, uint32_t line) +{ + /* User can add his own implementation to report the file name and line number, + ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */ + + /* Infinite loop */ + while (1) + { + } +} + +#endif + +/** + * @} + */ + +/** + * @} + */ + +/******************* (C) COPYRIGHT 2011 STMicroelectronics *****END OF FILE****/