- /****************************************************************************
- * File Name : key_led.c.c
- * Author : MCD Application Team
- * FW Version : V2.0.1
- * Date : 06/11/2012
- * Description : This file provides all the RCC firmware functions.
- *开发板 :神舟三号
- * 现象 :如程序执行前按住按键USER2 LED亮起,没按则灯不亮
- *****************************************************************************
- */
-
- #include "stm32f10x_lib.h"
- ///////////// define LED ///////////////
- #define RCC_GPIO_LED RCC_APB2Periph_GPIOF
- #define GPIO_LED GPIOF
- #define GPIO_LED_PIN GPIO_Pin_6
-
- ///////////// define KEY ///////////////
- #define RCC_GPIO_KEY RCC_APB2Periph_GPIOD
- #define GPIO_KEY GPIOD
- #define GPIO_KEY_PIN GPIO_Pin_3
-
- ///////////// define Beep ///////////////
- #define RCC_GPIO_BEEP RCC_APB2Periph_GPIOB
- #define GPIO_BEEP GPIOB
- #define GPIO_BEEP_PIN GPIO_Pin_10
-
- ///////////// config LED ///////////////
- void LED_Config(void)
- {
- GPIO_InitTypeDef GPIO_InitStructure;
- // RCC_ABP2PeriphClockCmd(RCC_GPIO_LED,ENABLE);
- GPIO_InitStructure.GPIO_Pin = GPIO_LED_PIN;
- GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
- GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
- // GPIO_SetBits(GPIO_LED,GPIO_LED_PIN); //初始化完成才能使用输出功能
- GPIO_Init(GPIO_LED, &GPIO_InitStructure);
- GPIO_SetBits(GPIO_LED,GPIO_LED_PIN);
- }
- void LED_Turn_on(void)
- {
- GPIO_ResetBits(GPIO_LED,GPIO_LED_PIN);
- }
- void LED_Turn_off(void)
- {
- GPIO_SetBits(GPIO_LED,GPIO_LED_PIN);
- }
-
-
- ///////////// config KEY ///////////////
- void KEY_Config(void)
- {
- GPIO_InitTypeDef GPIO_InitStructure;
- // RCC_ABP2PeriphClockCmd(RCC_GPIO_KEY,ENABLE);
- GPIO_InitStructure.GPIO_Pin = GPIO_KEY_PIN;
- GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;//需要配置速率
- GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
- GPIO_Init(GPIO_KEY, &GPIO_InitStructure);
- }
- int Is_KeyDown(void)
- {
- if( !GPIO_ReadInputDataBit(GPIO_KEY,GPIO_KEY_PIN) )
- {
- return 1 ;
- }
- else
- return 0 ;
- }
-
- /////// RccConfig///////
- void RccConfiguration(void)
- {
- ErrorStatus HSEStartUpStatus;
- /* RCC system reset(for debug purpose) */
- RCC_DeInit();
- /* Enable HSE */
- RCC_HSEConfig(RCC_HSE_ON); //启动外部晶体震荡器
- /* Wait till HSE is ready */
- HSEStartUpStatus = RCC_WaitForHSEStartUp(); //等待启动完成
- if(HSEStartUpStatus == SUCCESS) //如果启动成功,继续配置系统频率
- {
- /* Enable Prefetch Buffer */
- FLASH_PrefetchBufferCmd(FLASH_PrefetchBuffer_Enable);//选择flash预取址缓存模式
- /* Flash 2 wait state */
- FLASH_SetLatency(FLASH_Latency_2); //设置flash存储器延时时钟周期数
-
- /* HCLK = SYSCLK */
- RCC_HCLKConfig(RCC_SYSCLK_Div1); //设置HCLK相对SYSCLK的分频比例 AHB时钟
-
- /* PCLK2 = HCLK */
- RCC_PCLK2Config(RCC_HCLK_Div1); //设置PCLK2相对SYSCLK的分频比例 设置高速AHB时钟
- /* PCLK1 = HCLK/2 */
- RCC_PCLK1Config(RCC_HCLK_Div2);
- /* PLLCLK = 8MHz * 9 = 72 MHz */
- RCC_PLLConfig(RCC_PLLSource_HSE_Div1, RCC_PLLMul_9);
- /* Enable PLL */
- RCC_PLLCmd(ENABLE);//启动PLL
- /* Wait till PLL is ready */
- while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET)
- {
- }
- /* Select PLL as system clock source */
- RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK);
- /* Wait till PLL is used as system clock source */
- while(RCC_GetSYSCLKSource() != 0x08)
- {
- }
- }
-
- RCC_APB2PeriphClockCmd(RCC_GPIO_LED,ENABLE);
- RCC_APB2PeriphClockCmd(RCC_GPIO_KEY,ENABLE);
- RCC_APB2PeriphClockCmd(RCC_GPIO_BEEP,ENABLE);
- }
-
-
- //////// NvicConfig//////////
- void NvicConfiguration(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
- }
- void ConfigureInterfaces(void)
- {
- /* System Clocks Configuration */
- RccConfiguration(); //配置系统时钟
-
- /* NVIC configuration */
- NvicConfiguration(); //设置向量入口
- }
-
- int main(void)
- {
- ConfigureInterfaces();
- LED_Config();
- KEY_Config();
- while(1)
- {
- if(Is_KeyDown()==1)
- {
- LED_Turn_on();
- }
- else
- {
- LED_Turn_off();
- }
- }
- }
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