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Diffstat (limited to 'src/stm32lib/examples/IWDG/main.c')
| -rwxr-xr-x | src/stm32lib/examples/IWDG/main.c | 281 |
1 files changed, 281 insertions, 0 deletions
diff --git a/src/stm32lib/examples/IWDG/main.c b/src/stm32lib/examples/IWDG/main.c new file mode 100755 index 0000000..d2bc6c8 --- /dev/null +++ b/src/stm32lib/examples/IWDG/main.c @@ -0,0 +1,281 @@ +/******************** (C) COPYRIGHT 2008 STMicroelectronics ********************
+* File Name : main.c
+* Author : MCD Application Team
+* Version : V2.0.1
+* Date : 06/13/2008
+* Description : Main program body.
+********************************************************************************
+* 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.
+*******************************************************************************/
+
+/* Includes ------------------------------------------------------------------*/
+#include "stm32f10x_lib.h"
+#include "platform_config.h"
+
+/* Private typedef -----------------------------------------------------------*/
+/* Private define ------------------------------------------------------------*/
+/* Private macro -------------------------------------------------------------*/
+/* Private variables ---------------------------------------------------------*/
+ErrorStatus HSEStartUpStatus;
+
+/* Private function prototypes -----------------------------------------------*/
+void RCC_Configuration(void);
+void NVIC_Configuration(void);
+void GPIO_Configuration(void);
+void EXTI_Configuration(void);
+void SysTick_Configuration(void);
+void Delay(vu32 nCount);
+
+/* Private functions ---------------------------------------------------------*/
+/*******************************************************************************
+* Function Name : main
+* Description : Main program.
+* Input : None
+* Output : None
+* Return : None
+*******************************************************************************/
+int main(void)
+{
+#ifdef DEBUG
+ debug();
+#endif
+
+ /* System Clocks Configuration */
+ RCC_Configuration();
+
+ /* GPIO configuration */
+ GPIO_Configuration();
+
+ /* Check if the system has resumed from IWDG reset */
+ if (RCC_GetFlagStatus(RCC_FLAG_IWDGRST) != RESET)
+ {/* IWDGRST flag set */
+ /* Set GPIO_LED pin 6 */
+ GPIO_SetBits(GPIO_LED, GPIO_Pin_6);
+
+ /* Clear reset flags */
+ RCC_ClearFlag();
+ }
+ else
+ {/* IWDGRST flag is not set */
+ /* Reset GPIO_LED pin 6 */
+ GPIO_ResetBits(GPIO_LED, GPIO_Pin_6);
+ }
+
+ /* Configure Key Button EXTI Line to generate an interrupt on falling edge */
+ EXTI_Configuration();
+
+ /* NVIC configuration */
+ NVIC_Configuration();
+
+ /* Configure SysTick to generate an interrupt each 250ms */
+ SysTick_Configuration();
+
+ /* IWDG timeout equal to 280 ms (the timeout may varies due to LSI frequency
+ dispersion) */
+ /* Enable write access to IWDG_PR and IWDG_RLR registers */
+ IWDG_WriteAccessCmd(IWDG_WriteAccess_Enable);
+
+ /* IWDG counter clock: 40KHz(LSI) / 32 = 1.25 KHz */
+ IWDG_SetPrescaler(IWDG_Prescaler_32);
+
+ /* Set counter reload value to 349 */
+ IWDG_SetReload(349);
+
+ /* Reload IWDG counter */
+ IWDG_ReloadCounter();
+
+ /* Enable IWDG (the LSI oscillator will be enabled by hardware) */
+ IWDG_Enable();
+
+ while (1)
+ {}
+}
+
+/*******************************************************************************
+* Function Name : RCC_Configuration
+* Description : Configures the different system clocks.
+* Input : None
+* Output : None
+* Return : None
+*******************************************************************************/
+void RCC_Configuration(void)
+{
+ /* RCC system reset(for debug purpose) */
+ RCC_DeInit();
+
+ /* Enable HSE */
+ RCC_HSEConfig(RCC_HSE_ON);
+
+ /* Wait till HSE is ready */
+ HSEStartUpStatus = RCC_WaitForHSEStartUp();
+
+ if (HSEStartUpStatus == SUCCESS)
+ {
+ /* Enable Prefetch Buffer */
+ FLASH_PrefetchBufferCmd(FLASH_PrefetchBuffer_Enable);
+
+ /* Flash 0 wait state */
+ FLASH_SetLatency(FLASH_Latency_0);
+
+ /* HCLK = SYSCLK */
+ RCC_HCLKConfig(RCC_SYSCLK_Div1);
+
+ /* PCLK2 = HCLK */
+ RCC_PCLK2Config(RCC_HCLK_Div1);
+
+ /* PCLK1 = HCLK */
+ RCC_PCLK1Config(RCC_HCLK_Div1);
+
+ /* Select HSE as system clock source */
+ RCC_SYSCLKConfig(RCC_SYSCLKSource_HSE);
+
+ /* Wait till HSE is used as system clock source */
+ while (RCC_GetSYSCLKSource() != 0x04)
+ {}
+ }
+
+ /* Enable Key Button GPIO Port, GPIO_LED and AFIO clock */
+ RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIO_KEY_BUTTON | RCC_APB2Periph_GPIO_LED
+ | RCC_APB2Periph_AFIO, ENABLE);
+}
+
+/*******************************************************************************
+* Function Name : GPIO_Configuration
+* Description : Configures the different GPIO ports.
+* Input : None
+* Output : None
+* Return : None
+*******************************************************************************/
+void GPIO_Configuration(void)
+{
+ GPIO_InitTypeDef GPIO_InitStructure;
+
+ /* Configure GPIO_LED pin 6 and pin 7 as Output push-pull */
+ GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6 | GPIO_Pin_7;
+ GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
+ GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
+ GPIO_Init(GPIO_LED, &GPIO_InitStructure);
+
+ /* Configure Key Button GPIO Pin as input floating (Key Button EXTI Line) */
+ GPIO_InitStructure.GPIO_Pin = GPIO_PIN_KEY_BUTTON;
+ GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
+ GPIO_Init(GPIO_KEY_BUTTON, &GPIO_InitStructure);
+}
+
+/*******************************************************************************
+* Function Name : EXTI_Configuration
+* Description : Configures EXTI Line9.
+* Input : None
+* Output : None
+* Return : None
+*******************************************************************************/
+void EXTI_Configuration(void)
+{
+ EXTI_InitTypeDef EXTI_InitStructure;
+
+ /* Connect Key Button EXTI Line to Key Button GPIO Pin */
+ GPIO_EXTILineConfig(GPIO_PORT_SOURCE_KEY_BUTTON, GPIO_PIN_SOURCE_KEY_BUTTON);
+
+ /* Configure Key Button EXTI Line to generate an interrupt on falling edge */
+ EXTI_ClearITPendingBit(EXTI_LINE_KEY_BUTTON);
+ EXTI_InitStructure.EXTI_Line = EXTI_LINE_KEY_BUTTON;
+ EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
+ EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;
+ EXTI_InitStructure.EXTI_LineCmd = ENABLE;
+ EXTI_Init(&EXTI_InitStructure);
+}
+
+/*******************************************************************************
+* Function Name : NVIC_Configuration
+* Description : Configure the nested vectored interrupt controller.
+* Input : None
+* Output : None
+* Return : None
+*******************************************************************************/
+void NVIC_Configuration(void)
+{
+ NVIC_InitTypeDef NVIC_InitStructure;
+
+#ifdef VECT_TAB_RAM
+ /* Set the Vector Table base location at 0x20000000 */
+ NVIC_SetVectorTable(NVIC_VectTab_RAM, 0x0);
+#else /* VECT_TAB_FLASH */
+ /* Set the Vector Table base location at 0x08000000 */
+ NVIC_SetVectorTable(NVIC_VectTab_FLASH, 0x0);
+#endif
+
+ /* Configure one bit for preemption priority */
+ NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1);
+
+ /* Enable the EXTI9_5 Interrupt */
+ NVIC_InitStructure.NVIC_IRQChannel = EXTI9_5_IRQChannel;
+ NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
+ NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
+ NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
+ NVIC_Init(&NVIC_InitStructure);
+
+ /* Set SysTick interrupt vector Preemption Priority to 1 */
+ NVIC_SystemHandlerPriorityConfig(SystemHandler_SysTick, 1, 0);
+}
+
+/*******************************************************************************
+* Function Name : Delay
+* Description : Inserts a delay time.
+* Input : nCount: specifies the delay time length.
+* Output : None
+* Return : None
+*******************************************************************************/
+void Delay(vu32 nCount)
+{
+ for (; nCount != 0; nCount--);
+}
+
+#ifdef DEBUG
+/*******************************************************************************
+* Function Name : assert_failed
+* Description : Reports the name of the source file and the source line number
+* where the assert_param error has occurred.
+* Input : - file: pointer to the source file name
+* - line: assert_param error line source number
+* Output : None
+* Return : None
+*******************************************************************************/
+void assert_failed(u8* file, u32 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
+
+/*******************************************************************************
+* Function Name : SysTick_Configuration
+* Description : Configures SysTick to generate an interrupt each 250ms.
+* Input : None
+* Output : None
+* Return : None
+*******************************************************************************/
+void SysTick_Configuration(void)
+{
+ /* Select HCLK/8 as SysTick clock source */
+ SysTick_CLKSourceConfig(SysTick_CLKSource_HCLK_Div8);
+
+ /* SysTick interrupt each 250ms with counter clock equal to 1MHz */
+ SysTick_SetReload(250000);
+
+ /* Enable the SysTick Counter */
+ SysTick_CounterCmd(SysTick_Counter_Enable);
+
+ /* Enable the SysTick Interrupt */
+ SysTick_ITConfig(ENABLE);
+}
+
+/******************* (C) COPYRIGHT 2008 STMicroelectronics *****END OF FILE****/
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