--- /dev/null
+/**
+ ******************************************************************************
+ * @file IO_Toggle/main.c
+ * @author MCD Application Team
+ * @version V1.0.0
+ * @date 19-September-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 "stm32f4_discovery.h"
+#include "stm32f4xx_conf.h"
+
+/** @addtogroup STM32F4_Discovery_Peripheral_Examples
+ * @{
+ */
+
+/** @addtogroup IO_Toggle
+ * @{
+ */
+
+/* Private typedef -----------------------------------------------------------*/
+GPIO_InitTypeDef GPIO_InitStructure;
+
+/* Private define ------------------------------------------------------------*/
+/* Private macro -------------------------------------------------------------*/
+/* Private variables ---------------------------------------------------------*/
+/* Private function prototypes -----------------------------------------------*/
+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_stm32f4xx.s) before to branch to application main.
+ To reconfigure the default setting of SystemInit() function, refer to
+ system_stm32f4xx.c file
+ */
+
+ /* GPIOD Periph clock enable */
+ RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOD, ENABLE);
+
+ /* Configure PD12, PD13, PD14 and PD15 in output pushpull mode */
+ GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12 | GPIO_Pin_13| GPIO_Pin_14| GPIO_Pin_15;
+ GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;
+ GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
+ GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;
+ GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
+ GPIO_Init(GPIOD, &GPIO_InitStructure);
+
+ while (1)
+ {
+ /* PD12 to be toggled */
+ GPIO_SetBits(GPIOD, GPIO_Pin_12);
+
+ /* Insert delay */
+ Delay(0x3FFFFF);
+
+ /* PD13 to be toggled */
+ GPIO_SetBits(GPIOD, GPIO_Pin_13);
+
+ /* Insert delay */
+ Delay(0x3FFFFF);
+
+ /* PD14 to be toggled */
+ GPIO_SetBits(GPIOD, GPIO_Pin_14);
+
+ /* Insert delay */
+ Delay(0x3FFFFF);
+
+ /* PD15 to be toggled */
+ GPIO_SetBits(GPIOD, GPIO_Pin_15);
+
+ /* Insert delay */
+ Delay(0x7FFFFF);
+
+ GPIO_ResetBits(GPIOD, GPIO_Pin_12|GPIO_Pin_13|GPIO_Pin_14|GPIO_Pin_15);
+
+ /* Insert delay */
+ Delay(0xFFFFFF);
+ }
+}
+
+/**
+ * @brief Delay Function.
+ * @param nCount:specifies the Delay time length.
+ * @retval None
+ */
+void Delay(__IO uint32_t nCount)
+{
+ while(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****/