From 32e57dac2e61e79b029593eb4d34d727bcc10678 Mon Sep 17 00:00:00 2001 From: iperry Date: Thu, 17 Dec 2009 02:37:07 +0000 Subject: Initial commit of library code, moved from leaftest repo git-svn-id: https://leaflabs.googlecode.com/svn/trunk/library@69 749a229e-a60e-11de-b98f-4500b42dc123 --- src/stm32lib/examples/WWDG/main.c | 257 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 257 insertions(+) create mode 100755 src/stm32lib/examples/WWDG/main.c (limited to 'src/stm32lib/examples/WWDG/main.c') diff --git a/src/stm32lib/examples/WWDG/main.c b/src/stm32lib/examples/WWDG/main.c new file mode 100755 index 0000000..a59b45e --- /dev/null +++ b/src/stm32lib/examples/WWDG/main.c @@ -0,0 +1,257 @@ +/******************** (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 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 WWDG reset */ + if (RCC_GetFlagStatus(RCC_FLAG_WWDGRST) != RESET) + { /* WWDGRST flag set */ + /* Set GPIO_LED pin 6 */ + GPIO_SetBits(GPIO_LED, GPIO_Pin_6); + + /* Clear reset flags */ + RCC_ClearFlag(); + } + else + { /* WWDGRST 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(); + + /* WWDG configuration */ + /* Enable WWDG clock */ + RCC_APB1PeriphClockCmd(RCC_APB1Periph_WWDG, ENABLE); + + /* WWDG clock counter = (PCLK1/4096)/8 = 244 Hz (~4 ms) */ + WWDG_SetPrescaler(WWDG_Prescaler_8); + + /* Set Window value to 65 */ + WWDG_SetWindowValue(65); + + /* Enable WWDG and set counter value to 127, WWDG timeout = ~4 ms * 64 = 262 ms */ + WWDG_Enable(127); + + /* Clear EWI flag */ + WWDG_ClearFlag(); + + /* Enable EW interrupt */ + WWDG_EnableIT(); + + 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 */ + 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 : Configures NVIC and Vector Table base location. +* 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 + + /* 2 bits for Preemption Priority and 2 bits for Sub Priority */ + NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2); + + 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); + + NVIC_InitStructure.NVIC_IRQChannel = WWDG_IRQChannel; + NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1; + NVIC_Init(&NVIC_InitStructure); +} + +/******************************************************************************* +* 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 + +/******************* (C) COPYRIGHT 2008 STMicroelectronics *****END OF FILE****/ -- cgit v1.2.3