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

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****/