/**
******************************************************************************
* @file NVIC/IRQ_Priority/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.
*
*
© COPYRIGHT 2011 STMicroelectronics
******************************************************************************
*/
/* Includes ------------------------------------------------------------------*/
#include "stm32f10x.h"
#include "stm32_eval.h"
/** @addtogroup STM32F10x_StdPeriph_Examples
* @{
*/
/** @addtogroup IRQ_Priority
* @{
*/
/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
__IO uint8_t PreemptionOccured = 0;
__IO uint8_t PreemptionPriorityValue = 0;
/* Private function prototypes -----------------------------------------------*/
void NVIC_Config(void);
void Delay(__IO uint32_t nCount);
/* 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
*/
/* NVIC configuration ------------------------------------------------------*/
NVIC_Config();
/* Initialize LED1..LED4, Key and Sel Joystick Buttons mounted on STM3210X-EVAL
board */
STM_EVAL_LEDInit(LED1);
STM_EVAL_LEDInit(LED2);
STM_EVAL_LEDInit(LED3);
STM_EVAL_LEDInit(LED4);
STM_EVAL_PBInit(BUTTON_KEY, BUTTON_MODE_EXTI);
STM_EVAL_PBInit(BUTTON_WAKEUP, BUTTON_MODE_EXTI);
/* Configure the SysTick Handler Priority: Preemption priority and subpriority */
NVIC_SetPriority(SysTick_IRQn, NVIC_EncodePriority(NVIC_GetPriorityGrouping(), !PreemptionPriorityValue, 0));
while (1)
{
if(PreemptionOccured != 0)
{
/* Toggel The lED1 */
STM_EVAL_LEDToggle(LED1);
/* Insert delay Time */
Delay(0x5FFFF);
STM_EVAL_LEDToggle(LED2);
Delay(0x5FFFF);
STM_EVAL_LEDToggle(LED3);
Delay(0x5FFFF);
STM_EVAL_LEDToggle(LED4);
Delay(0x5FFFF);
}
}
}
/**
* @brief Configures the NVIC interrupts.
* @param None
* @retval None
*/
void NVIC_Config(void)
{
NVIC_InitTypeDef NVIC_InitStructure;
/* Configure the preemption priority and subpriority:
- 1 bits for pre-emption priority: possible value are 0 or 1
- 3 bits for subpriority: possible value are 0..7
- Lower values gives higher priority
*/
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1);
/* Enable the WAKEUP_BUTTON_EXTI_IRQn Interrupt */
NVIC_InitStructure.NVIC_IRQChannel = WAKEUP_BUTTON_EXTI_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = PreemptionPriorityValue;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
/* Enable the KEY_BUTTON_EXTI_IRQn Interrupt */
NVIC_InitStructure.NVIC_IRQChannel = KEY_BUTTON_EXTI_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
}
/**
* @brief Inserts a delay time.
* @param nCount: specifies the delay time length.
* @retval None
*/
void Delay(__IO uint32_t nCount)
{
for(; nCount != 0; nCount--);
}
#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****/