流水灯入门之 STM32F429

在实现灯闪烁之前，安装MDK500遇到了很多问题，一个问题就是注册机有问题，无法破解，不过还是搞好了，还有一个问题就是pack installer更新无法更新到STM32F29， 不过去网上下载了一个mdkcm510.exe，之后行了，不知道什么原因。我比较懒，所以直接在官方的template上直接添加了流水灯的功能。
/**
  ******************************************************************************
  *@file    Template/main.c
  *@author  MCD Application Team
  *@version V1.0.0
  *@date    20-September-2013
  *@brief   Main program body
  ******************************************************************************
  *@attention
  *
  *<h2><center>&copy; COPYRIGHT 2013STMicroelectronics</center></h2>
  *
  *Licensed under MCD-ST Liberty SW License Agreement V2, (the"License");
  *You may not use this file except in compliance with the License.
  *You may obtain a copy of the License at:
  *
  *       http://www.st.com/software_license_agreement_liberty_v2
  *
  *Unless required by applicable law or agreed to in writing, software
  *distributed under the License is distributed on an "AS IS" BASIS,
  *WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  *See the License for the specific language governing permissions and
  *limitations under the License.
  *
  ******************************************************************************
  */
/*Includes ------------------------------------------------------------------*/
#include"main.h"
/**@addtogroup Template
  *@{
  */
/*Private typedef -----------------------------------------------------------*/
/*Private define ------------------------------------------------------------*/
/*Private macro -------------------------------------------------------------*/
/*Private variables ---------------------------------------------------------*/
/*Private function prototypes -----------------------------------------------*/
/*Private functions ---------------------------------------------------------*/
/**
  *@brief   Main program
  *@param  None
  *@retval None
  */
      

voidLEDInit(void)  
{  
  GPIO_InitTypeDef  GPIO_InitStructure;  //定义一个GPIO变量
  /*Enable the GPIO_LED Clock */  
  RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOG, ENABLE);  
  GPIO_InitStructure.GPIO_Pin= GPIO_Pin_13|GPIO_Pin_14;     //因为LED3,LED4选择的事PIN13和PIN14  
  GPIO_InitStructure.GPIO_Mode= GPIO_Mode_OUT;      //设置为输出模式
  GPIO_InitStructure.GPIO_OType= GPIO_OType_PP;    // 设置推挽输出
  GPIO_InitStructure.GPIO_PuPd= GPIO_PuPd_UP;        // 上拉
  GPIO_InitStructure.GPIO_Speed= GPIO_Speed_100MHz;  //GPIO速度
  GPIO_Init(GPIOG,&GPIO_InitStructure);  //初始化GPIOG
}  
/**
  *@brief  Inserts a delay time.
  *@param  nCount: specifies the delay time length.
  *@retval None
  */
staticvoid Delay(__IO uint32_t nCount)
{
  /*Decrement nCount value */
  while(nCount ！= 0)
  {
   nCount--;
  }
}
      
intmain(void)
{
  /*！<At this stage the microcontroller clock setting is already configured,
      this is done through SystemInit() function which is calledfrom startup
      files (startup_stm32f429_439xx.s) before to branch toapplication main.
      To reconfigure the default setting of SystemInit()function, refer to
      system_stm32f4xx.c file
    */  
  /*Add your application code here */
  /*Infinite loop */
  LEDInit();
  while(1)  
  {  
  GPIO_ToggleBits(GPIOG,GPIO_Pin_13|GPIO_Pin_14);
  /*Insert a delay */
  Delay(0x3FFFFF);//这个延时一定要加，不然看不到灯闪烁的效果，我之前把这个时间搞小了，导致没有效果
  }  
}
#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
  */
voidassert_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 STMicroelectronics *****END OF FILE****/

最后看下效果

上面仅仅是闪烁，改成下面的代码就是真正的流水灯了
GPIO_WriteBit(GPIOG,GPIO_Pin_13,Bit_SET);
       GPIO_WriteBit(GPIOG,GPIO_Pin_14,Bit_RESET);
  /*Insert a delay */
  Delay(0x3FFFFF);
       Delay(0x3FFFFF);
       Delay(0x3FFFFF);
       Delay(0x3FFFFF);
       GPIO_WriteBit(GPIOG,GPIO_Pin_14,Bit_SET);
       GPIO_WriteBit(GPIOG,GPIO_Pin_13,Bit_RESET);
  Delay(0x3FFFFF);
       Delay(0x3FFFFF);
       Delay(0x3FFFFF);
       Delay(0x3FFFFF);