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view libs/STM32F10x_StdPeriph_Lib_V3.5.0/Project/STM32F10x_StdPeriph_Examples/PWR/STANDBY/main.c @ 55:b21db2b47a27
Enable DMA mode by initing DMA channel and enabling IRQ handler.
author | Daniel O'Connor <darius@dons.net.au> |
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date | Sun, 07 Apr 2013 22:34:05 +0930 |
parents | c59513fd84fb |
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/** ****************************************************************************** * @file PWR/STANDBY/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_STANDBY * @{ */ /* Private typedef -----------------------------------------------------------*/ /* Private define ------------------------------------------------------------*/ /* Private macro -------------------------------------------------------------*/ /* Private variables ---------------------------------------------------------*/ /* Private function prototypes -----------------------------------------------*/ void RTC_Configuration(void); void SysTick_Configuration(void); /* 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_PBInit(BUTTON_KEY, BUTTON_MODE_EXTI); /* Turn on LED1 */ STM_EVAL_LEDOn(LED1); /* Enable PWR and BKP clock */ RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR | RCC_APB1Periph_BKP, ENABLE); /* Enable WKUP pin */ PWR_WakeUpPinCmd(ENABLE); /* Allow access to BKP Domain */ PWR_BackupAccessCmd(ENABLE); /* Configure RTC clock source and prescaler */ RTC_Configuration(); /* Configure the SysTick to generate an interrupt each 250 ms */ SysTick_Configuration(); while (1) { } } /** * @brief Configures RTC clock source and prescaler. * @param None * @retval None */ void RTC_Configuration(void) { /* Check if the StandBy flag is set */ if(PWR_GetFlagStatus(PWR_FLAG_SB) != RESET) {/* System resumed from STANDBY mode */ /* Turn on LED2 */ STM_EVAL_LEDOn(LED2); /* Clear StandBy flag */ PWR_ClearFlag(PWR_FLAG_SB); /* Wait for RTC APB registers synchronisation */ RTC_WaitForSynchro(); /* No need to configure the RTC as the RTC configuration(clock source, enable, prescaler,...) is kept after wake-up from STANDBY */ } else {/* StandBy flag is not set */ /* RTC clock source configuration ----------------------------------------*/ /* Reset Backup Domain */ BKP_DeInit(); /* Enable 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(); } } /** * @brief Configures the SysTick to generate an interrupt each 250 ms. * @param None * @retval None */ void SysTick_Configuration(void) { /* SysTick interrupt each 250 ms with SysTick Clock equal to (HCLK/8) */ if (SysTick_Config((SystemCoreClock/8) / 4)) { /* Capture error */ while (1); } /* Select AHB clock(HCLK) divided by 8 as SysTick clock source */ SysTick_CLKSourceConfig(SysTick_CLKSource_HCLK_Div8); /* Set SysTick Preemption Priority to 1 */ NVIC_SetPriority(SysTick_IRQn, 0x04); } #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****/