作业一：Keil的安装：http://forum.eepw.com.cn/thread/277213/1#4
作业二：流水灯：http://forum.eepw.com.cn/thread/277213/1#2
作业三：0~99按键计数：http://forum.eepw.com.cn/thread/277213/1#3
作业四：单号uart控制LED流水灯转速：http://forum.eepw.com.cn/thread/277213/1#5
作业五：定时器控制led跑马灯：http://forum.eepw.com.cn/thread/277213/1#6
作业二：流水灯
/**
******************************************************************************
* @file GPIO/IOToggle/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.
*
* <h2><center>© COPYRIGHT 2011 STMicroelectronics</center></h2>
******************************************************************************
*/
/* Includes ------------------------------------------------------------------*/
#include "stm32f10x.h"
#include "stm32_eval.h"
GPIO_InitTypeDef GPIO_InitStructure;
void RCC_Configuration(void)
{
RCC_DeInit();
RCC_HSICmd(ENABLE);
while(RCC_GetFlagStatus(RCC_FLAG_HSIRDY) == RESET);
RCC_SYSCLKConfig(RCC_SYSCLKSource_HSI);
RCC_HSEConfig(RCC_HSE_OFF);
RCC_LSEConfig(RCC_LSE_OFF);
RCC_PLLConfig(RCC_PLLSource_HSI_Div2,RCC_PLLMul_9); // 72HMz
RCC_PLLCmd(ENABLE);
while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET);
RCC_ADCCLKConfig(RCC_PCLK2_Div4);
RCC_PCLK2Config(RCC_HCLK_Div1);
RCC_PCLK1Config(RCC_HCLK_Div2);
RCC_HCLKConfig(RCC_SYSCLK_Div1);
RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK);
while(RCC_GetSYSCLKSource() != 0x08);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOD|RCC_APB2Periph_AFIO, ENABLE);
GPIO_PinRemapConfig(GPIO_Remap_SWJ_JTAGDisable,ENABLE);//disable JTAG
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_Init(GPIOD, &GPIO_InitStructure);
GPIO_ResetBits(GPIOD,GPIO_Pin_2);
}
void delay_us(u32 n)
{
u8 j;
while(n--)
for(j=0;j<10;j++);
}
void delay_ms(u32 n)
{
while(n--)
delay_us(1000);
}
/**
* @brief Main program.
* @param None
* @retval None
*/
int main(void)
{
int i;
unsigned int a[8]={GPIO_Pin_0,GPIO_Pin_1,GPIO_Pin_2,GPIO_Pin_3,GPIO_Pin_4,GPIO_Pin_5,GPIO_Pin_6,GPIO_Pin_7};
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC, ENABLE);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_1| GPIO_Pin_2| GPIO_Pin_3| GPIO_Pin_4| GPIO_Pin_5| GPIO_Pin_6| GPIO_Pin_7;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_Init(GPIOC, &GPIO_InitStructure);
while(1)
{
for(i=0;i<=7;i++)
{
GPIO_SetBits(GPIOC,GPIO_Pin_0|GPIO_Pin_1|GPIO_Pin_2|GPIO_Pin_3|GPIO_Pin_4|GPIO_Pin_5|GPIO_Pin_6|GPIO_Pin_7);
delay_ms(50);
GPIO_ResetBits(GPIOC,a[i]);
delay_ms(50);
GPIO_SetBits(GPIOC,a[i]);
delay_ms(50);
}
}
}
作业三：0~99按键计数
#include "stm32f10x.h" GPIO_InitTypeDef GPIO_InitStructure; // 声明一个结构体 void RCC_Configuration(void); void GPIO_INIT(void) ; void Function(void) ; int main(void) { RCC_Configuration(); GPIO_INIT(); Function(); } void RCC_Configuration(void) //复位所有的RCC外围设备寄存器 { ErrorStatus HSEStartUpStatus; // 设置错误标志量 RCC_DeInit(); //*将外设寄存器RCC重设为初始值 RCC_HSEConfig(RCC_HSE_ON);//*打开外部高速时钟晶振HSE： HSEStartUpStatus = RCC_WaitForHSEStartUp(); //*等待外部高速时钟晶振工作： if(HSEStartUpStatus==SUCCESS) { RCC_HCLKConfig(RCC_SYSCLK_Div1);//*AHB使用系统时钟,负责外部存储器的时钟 RCC_PCLK1Config(RCC_HCLK_Div2);//*APB1 负责DA,USB,SPI,I2C,CAN，串口2345，普通TIM RCC_PCLK2Config(RCC_HCLK_Div1);//*APB2负责AD,I/O,高级TIM,串口1 RCC_PLLConfig(RCC_PLLSource_HSE_Div1,RCC_PLLMul_9);//*设置PLL输入时钟源72M RCC_PLLCmd(ENABLE);//*打开PLL： while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY)==RESET);//*等待PLL工作： RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK);//*设置系统时钟 while(RCC_GetSYSCLKSource() != 0x08);//* 判断PLL是否是系统时钟： } GPIO_PinRemapConfig(GPIO_Remap_SWJ_JTAGDisable,ENABLE);//改变管脚的映射SWJ使能，禁用JTAG，选择用于事件输出的GPIO端口 /*蜂鸣器*/ RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOD|RCC_APB2Periph_AFIO, ENABLE); //# 使能被重新映射到GPIOD时钟和使能复用时钟功能 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2; //#管脚号 关闭蜂鸣器 GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; //#输出速度 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP; //#推挽输出 GPIO_Init(GPIOD, &GPIO_InitStructure); //#初始化 GPIO_ResetBits(GPIOD,GPIO_Pin_2); } void delay_us(u32 n) //延时函数 { u8 j; while(n--) for(j=0;j<10;j++); } void delay_ms(u32 n) //延时函数 { while(n--) delay_us(1000); } void GPIO_INIT(void) { RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC|RCC_APB2Periph_GPIOB, ENABLE); GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8|GPIO_Pin_9|GPIO_Pin_10|GPIO_Pin_11; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; //输出速度 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING; GPIO_Init(GPIOC, &GPIO_InitStructure); //初始化 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5|GPIO_Pin_1|GPIO_Pin_15|GPIO_Pin_6|GPIO_Pin_7|GPIO_Pin_8|GPIO_Pin_9|GPIO_Pin_12|GPIO_Pin_13|GPIO_Pin_14;//数码管 GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP; GPIO_Init(GPIOB, &GPIO_InitStructure); } void Number(int a) //数码管显示数字 { switch(a) { case 0 : GPIO_ResetBits(GPIOB,GPIO_Pin_7|GPIO_Pin_8|GPIO_Pin_9|GPIO_Pin_12|GPIO_Pin_13|GPIO_Pin_14);break; case 1 : GPIO_ResetBits(GPIOB,GPIO_Pin_9|GPIO_Pin_12);break; case 2 : GPIO_ResetBits(GPIOB,GPIO_Pin_5|GPIO_Pin_7|GPIO_Pin_9|GPIO_Pin_13|GPIO_Pin_14);break; case 3 : GPIO_ResetBits(GPIOB,GPIO_Pin_5|GPIO_Pin_7|GPIO_Pin_9|GPIO_Pin_12|GPIO_Pin_14);break; case 4 : GPIO_ResetBits(GPIOB,GPIO_Pin_5|GPIO_Pin_8|GPIO_Pin_9|GPIO_Pin_12);break; case 5 : GPIO_ResetBits(GPIOB,GPIO_Pin_5|GPIO_Pin_7|GPIO_Pin_8|GPIO_Pin_12|GPIO_Pin_14);break; case 6 : GPIO_ResetBits(GPIOB,GPIO_Pin_5|GPIO_Pin_7|GPIO_Pin_8|GPIO_Pin_12|GPIO_Pin_13|GPIO_Pin_14);break; case 7 : GPIO_ResetBits(GPIOB,GPIO_Pin_7|GPIO_Pin_9|GPIO_Pin_12);break; case 8 : GPIO_ResetBits(GPIOB,GPIO_Pin_5|GPIO_Pin_7|GPIO_Pin_8|GPIO_Pin_9|GPIO_Pin_12|GPIO_Pin_13|GPIO_Pin_14);break; case 9 : GPIO_ResetBits(GPIOB,GPIO_Pin_5|GPIO_Pin_7|GPIO_Pin_8|GPIO_Pin_9|GPIO_Pin_12|GPIO_Pin_14); break; } } void Function(void) { int i=0,j=0; //i被按下的次数，n延时变量 GPIO_SetBits(GPIOB,GPIO_Pin_5|GPIO_Pin_6|GPIO_Pin_7|GPIO_Pin_8|GPIO_Pin_9|GPIO_Pin_12|GPIO_Pin_13|GPIO_Pin_14); delay_ms(50); //关闭数码管 while(1) { GPIO_SetBits(GPIOB,GPIO_Pin_1); //打开个位数码管 Number(i); //用switch函数显示00 delay_ms(t); GPIO_ResetBits(GPIOB,GPIO_Pin_1); //关闭个位 GPIO_SetBits(GPIOB,GPIO_Pin_5|GPIO_Pin_6|GPIO_Pin_7|GPIO_Pin_8|GPIO_Pin_9|GPIO_Pin_12|GPIO_Pin_13|GPIO_Pin_14); GPIO_SetBits(GPIOB,GPIO_Pin_15); //打开十位 Number(j); delay_ms(t); GPIO_ResetBits(GPIOB,GPIO_Pin_15); //关掉十位数码管 GPIO_SetBits(GPIOB,GPIO_Pin_5|GPIO_Pin_6|GPIO_Pin_7|GPIO_Pin_8|GPIO_Pin_9|GPIO_Pin_12|GPIO_Pin_13|GPIO_Pin_14); if(!GPIO_ReadInputDataBit(GPIOC,GPIO_Pin_8)) //判断按键是s1否被按下 { delay_ms(50); //延时消抖 if(!GPIO_ReadInputDataBit(GPIOC,GPIO_Pin_8)) //再次判断按键是s1否被按下 { i++; //按键被按下，个位+1 if(i==10) { j++; i=0; } if(j==10) { j=0; i=0; } } }
作业四：单号uart控制LED流水灯转速
#include "stm32f10x.h"
#include "stdio.h"
GPIO_InitTypeDef GPIO_InitStructure; // 声明结构体
NVIC_InitTypeDef NVIC_InitStructure;
USART_InitTypeDef USART_InitStructure;
USART_ClockInitTypeDef USART_ClockInitStructure;
#define buff_size 16;
char rx_buff[],rx_buff_count=0;
void RCC_Configuration(void) ;
void GPIO_INIT(void) ;
void USART_int(long BaudRate);
void USART_SendStr(char *str);
void delay_ms(u32 n) ;
void delay_us(u32 n);
/****主函数 ****/
int main()
{
RCC_Configuration();
GPIO_INIT();
USART_int(9600);
GPIO_ResetBits(GPIOC,0xffff);//led全亮，提示程序开始
delay_ms(200);
GPIO_SetBits(GPIOC,0xffff);//led全灭
USART_SendStr("USART Led Speed\r\n");//
USART_SendStr("\n>");//
while(1);
}
/**** 配置RCC ****/
void RCC_Configuration(void)
{
ErrorStatus HSEStartUpStatus; // 设置错误标志量
RCC_DeInit(); //*将外设寄存器RCC重设为初始值
RCC_HSEConfig(RCC_HSE_ON);//*打开外部高速时钟晶振HSE：
HSEStartUpStatus = RCC_WaitForHSEStartUp(); //*等待外部高速时钟晶振工作：
if(HSEStartUpStatus==SUCCESS)
{
RCC_HCLKConfig(RCC_SYSCLK_Div1);//*AHB使用系统时钟,负责外部存储器的时钟
RCC_PCLK1Config(RCC_HCLK_Div2);//*APB1 负责DA,USB,SPI,I2C,CAN，串口2345，普通TIM
RCC_PCLK2Config(RCC_HCLK_Div1);//*APB2负责AD,I/O,高级TIM,串口1
RCC_PLLConfig(RCC_PLLSource_HSE_Div1,RCC_PLLMul_9);//*设置PLL输入时钟源72M
RCC_PLLCmd(ENABLE);//*打开PLL：
while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY)==RESET);//*等待PLL工作：
RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK);//*设置系统时钟
while(RCC_GetSYSCLKSource() != 0x08);//* 判断PLL是否是系统时钟：
}
GPIO_PinRemapConfig(GPIO_Remap_SWJ_JTAGDisable,ENABLE);
/*蜂鸣器*/
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOD|RCC_APB2Periph_AFIO, ENABLE);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_Init(GPIOD, &GPIO_InitStructure);
GPIO_ResetBits(GPIOD,GPIO_Pin_2);
}
/****延时 ****/
void delay_us(u32 n)
{
u8 j;
while(n--)
for(j=0;j<10;j++);
}
void delay_ms(u32 n)
{
while(n--)
delay_us(1000);
}
/**** 初始化GPIO ****/
void GPIO_INIT(void)
{
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC, ENABLE);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0|GPIO_Pin_1|GPIO_Pin_2|GPIO_Pin_3|GPIO_Pin_4|GPIO_Pin_5|GPIO_Pin_6|GPIO_Pin_7;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_Init(GPIOC, &GPIO_InitStructure);
}
/**** USART传输的波特率 ****/
void USART_int(long BaudRate)
{
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA|RCC_APB2Periph_USART1,ENABLE);//使能PA和 usart1
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_10MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; //复用推挽输出 PA9作为US1的TX端，打开复用，负责发送数据
GPIO_Init(GPIOA, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10; //RX位于PA10
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING; //浮空输入，PA10作为US1的RX端，负责接收数据
//RX初始化PA10
USART_InitStructure.USART_BaudRate = BaudRate;//波特率
USART_InitStructure.USART_WordLength = USART_WordLength_8b;//USART_WordLength 在一个帧中传输8位数据（字节）
USART_InitStructure.USART_StopBits = USART_StopBits_1;//停止位为一个字节
USART_InitStructure.USART_Parity = USART_Parity_No;//无奇偶校验
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;//无流控制
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;//收发模式
USART_ClockInitStructure.USART_Clock = USART_Clock_Disable;//时钟低电平活动，开启发送接受数据功能（usart 使能）
USART_ClockInitStructure.USART_CPOL = USART_CPOL_Low; //SCLK输出时钟低电平
USART_ClockInitStructure.USART_CPHA = USART_CPHA_2Edge;//时钟第二个边沿开始数据捕获
USART_ClockInitStructure.USART_LastBit = USART_LastBit_Disable;//最后一位数据不从SCLK发出
USART_ClockInit(USART1, &USART_ClockInitStructure);//初始化USART1时钟
USART_Init(USART1, &USART_InitStructure);//初始化USART1
USART_Cmd(USART1, ENABLE);//USART1使能
USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);//使能接收中断，在接受移位寄存器中有数据时产生
USART_Cmd(USART1, ENABLE);
//配置NVIC ，设置优先级分组，使用NVIC_Init对NVIC进行初始化
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_0);//选择中断分组4(先占优先级四位，从优先级0)
NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn; //选择中断通道
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;//抢占优先级1-15
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;//响应优先级1-15
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;//使能中断
NVIC_Init(&NVIC_InitStructure); //初始化中断
}
/**** usart发送数据 ****/
void USART_SendStr(char *str) //USART发送数据
{
while((*str)!='\0')
{
USART_SendData(USART1,*str++); //通过外设 USARTx 发送单个数据
while(USART_GetFlagStatus(USART1, USART_FLAG_TXE) == RESET); //检查指定的 USART 标志位设置与否
}
}
/**** 取字符串中的数字 ****/
unsigned int translate(char* pstr)
{
int s = 0;
while(*pstr != '\0') //如果没扫到字符串的最后不停止
{
if(*pstr >= '0' && *pstr <= '9') //如果字符串中存在0-9的数字
{
s = s * 10 + *pstr - '0';
}
pstr++;
}
return s;
}
/**** 点亮led****/
void LED(char *S,char LEN) //(字符串，字符串长度)
{
int m,i;
int a[8]={GPIO_Pin_0,GPIO_Pin_1,GPIO_Pin_2,GPIO_Pin_3,GPIO_Pin_4,GPIO_Pin_5,GPIO_Pin_6,GPIO_Pin_7};
m=translate(S);
GPIO_SetBits(GPIOC,GPIO_Pin_0|GPIO_Pin_1|GPIO_Pin_2|GPIO_Pin_3|GPIO_Pin_4|GPIO_Pin_5|GPIO_Pin_6|GPIO_Pin_7);
delay_ms(100);
for(i=0;i<8;i++)
{
GPIO_ResetBits(GPIOC,a[i]); // 点亮LED
delay_ms(m);
GPIO_SetBits(GPIOC,a[i]); //熄灭LED
delay_ms(m);
}
}
void input_ASK()
{
char j;
LED(rx_buff,rx_buff_count);
rx_buff_count=0;
for (j=0;j<rx_buff_count;j++)
{
rx_buff[j]='\0';
}//判断读入信息是否结束，如果结束则准备下一次读入
USART_SendStr("\n>");
}
/****接收中断****/
void USART1_IRQHandler(void)
{
while(USART_GetFlagStatus(USART1, USART_FLAG_RXNE) == RESET) { } //判断接收中断是否打开
if(USART_ReceiveData(USART1)==0x0d)
{
input_ASK();
}
else
{
USART_SendData(USART1,USART_ReceiveData(USART1)); //将数据传回给电脑
rx_buff[rx_buff_count]= USART_ReceiveData(USART1);
rx_buff_count++;
}
USART_ClearFlag(USART1, USART_FLAG_RXNE); //清除中断接受完成标志位
}
作业五：定时器控制LED跑马灯
#include "stm32f10x.h"
#include "stm32_eval.h"
#include <stdio.h>
/** @addtogroup STM32F10x_StdPeriph_Examples
* @{
*/
/** @addtogroup EXTI_Config
* @{
*/
/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
EXTI_InitTypeDef EXTI_InitStructure;
GPIO_InitTypeDef GPIO_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;
USART_InitTypeDef USART_InitStructure;
USART_ClockInitTypeDef USART_ClockInitStructure;
/* Private function prototypes -----------------------------------------------*/
void EXTIkeyS3_Config(void);
void EXTIkeyS4_Config(void);
void RCC_Configuration(void)
{
RCC_DeInit();
RCC_HSICmd(ENABLE);
while(RCC_GetFlagStatus(RCC_FLAG_HSIRDY) == RESET);
RCC_SYSCLKConfig(RCC_SYSCLKSource_HSI);
RCC_HSEConfig(RCC_HSE_OFF);
RCC_LSEConfig(RCC_LSE_OFF);
RCC_PLLConfig(RCC_PLLSource_HSI_Div2,RCC_PLLMul_9); // 72HMz
RCC_PLLCmd(ENABLE);
while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET);
RCC_ADCCLKConfig(RCC_PCLK2_Div4);
RCC_PCLK2Config(RCC_HCLK_Div1);
RCC_PCLK1Config(RCC_HCLK_Div2);
RCC_HCLKConfig(RCC_SYSCLK_Div1);
RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK);
while(RCC_GetSYSCLKSource() != 0x08);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOD|RCC_APB2Periph_AFIO, ENABLE);
GPIO_PinRemapConfig(GPIO_Remap_SWJ_JTAGDisable,ENABLE);//disable JTAG
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOD|RCC_APB2Periph_AFIO, ENABLE);
GPIO_PinRemapConfig(GPIO_Remap_SWJ_JTAGDisable,ENABLE);//disable JTAG
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_Init(GPIOD, &GPIO_InitStructure);
GPIO_ResetBits(GPIOD,GPIO_Pin_2);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC|RCC_APB2Periph_AFIO, ENABLE);
GPIO_PinRemapConfig(GPIO_Remap_SWJ_JTAGDisable,ENABLE);//disable JTAG
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0|GPIO_Pin_1|GPIO_Pin_2|GPIO_Pin_3|GPIO_Pin_4|GPIO_Pin_5|GPIO_Pin_6|GPIO_Pin_7;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_Init(GPIOC, &GPIO_InitStructure);
GPIO_ResetBits(GPIOC,GPIO_Pin_0|GPIO_Pin_1|GPIO_Pin_2|GPIO_Pin_3|GPIO_Pin_4|GPIO_Pin_5|GPIO_Pin_6|GPIO_Pin_7);
}
void USART_int(long BaudRate)
{
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA|RCC_APB2Periph_USART1,ENABLE);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_10MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_Init(GPIOA, &GPIO_InitStructure);
/* PA10 USART1_Rx */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_Init(GPIOA, &GPIO_InitStructure);
/* USARTx configured as follow:
- BaudRate = 115200 baud
- Word Length = 8 Bits
- One Stop Bit
- No parity
- Hardware flow control disabled (RTS and CTS signals)
- Receive and transmit enabled
*/
USART_InitStructure.USART_BaudRate = BaudRate;//??????
USART_InitStructure.USART_WordLength = USART_WordLength_8b;//???????8bit
USART_InitStructure.USART_StopBits = USART_StopBits_1;//????1
USART_InitStructure.USART_Parity = USART_Parity_No;//????
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;//??????none
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;//??????????
USART_ClockInitStructure.USART_Clock = USART_Clock_Disable;
USART_ClockInitStructure.USART_CPOL = USART_CPOL_Low;
USART_ClockInitStructure.USART_CPHA = USART_CPHA_2Edge;
USART_ClockInitStructure.USART_LastBit = USART_LastBit_Disable;
USART_ClockInit(USART1, &USART_ClockInitStructure);
USART_Init(USART1, &USART_InitStructure);
USART_Cmd(USART1, ENABLE);
USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);
USART_Cmd(USART1, ENABLE);
/* Configure four bit for preemption priority */
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_4);
/* Enable the USART1 Interrupt */
NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn; //
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 15;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
}
/* Private functions ---------------------------------------------------------*/
/**
* @brief Main program.
* @param None
* @retval None
*/
int main(void)
{RCC_Configuration();
/* Configure PA.00 in interrupt mode */
EXTIkeyS3_Config();
/* Configure PB.09 or PG.08 in interrupt mode */
EXTIkeyS4_Config();
USART_int(115200);
printf("Config done,waiting for interrupt......\r\n");
while (1)
{
}
}
/**
* @brief Configure PA.00 in interrupt mode
* @param None
* @retval None
*/
void EXTIkeyS3_Config(void)
{
/* Enable GPIOA clock */
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC, ENABLE);
/* Configure PA.00 pin as input floating */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_Init(GPIOA, &GPIO_InitStructure);
/* Enable AFIO clock */
RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO, ENABLE);
/* Connect EXTI0 Line to PA.00 pin */
GPIO_EXTILineConfig(GPIO_PortSourceGPIOC, GPIO_PinSource10);
/* Configure EXTI0 line */
EXTI_InitStructure.EXTI_Line = EXTI_Line10;
EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;
EXTI_InitStructure.EXTI_LineCmd = ENABLE;
EXTI_Init(&EXTI_InitStructure);
/* Enable and set EXTI0 Interrupt to the lowest priority */
NVIC_InitStructure.NVIC_IRQChannel = EXTI15_10_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x0F;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x0F;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
}
/**
* @brief Configure PB.09 or PG.08 in interrupt mode
* @param None
* @retval None
*/
void EXTIkeyS4_Config(void)
{
/* Enable GPIOB clock */
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC, ENABLE);
/* Configure PB.09 pin as input floating */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_Init(GPIOC, &GPIO_InitStructure);
/* Enable AFIO clock */
RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO, ENABLE);
/* Connect EXTI9 Line to PB.09 pin */
GPIO_EXTILineConfig(GPIO_PortSourceGPIOC, GPIO_PinSource11);
/* Configure EXTI9 line */
EXTI_InitStructure.EXTI_Line = EXTI_Line11;
EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;
EXTI_InitStructure.EXTI_LineCmd = ENABLE;
EXTI_Init(&EXTI_InitStructure);
/* Enable and set EXTI9_5 Interrupt to the lowest priority */
NVIC_InitStructure.NVIC_IRQChannel = EXTI15_10_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x0F;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x0F;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
}
/******************************************************************************/
/* STM32F10x Peripherals Interrupt Handlers */
/******************************************************************************/
/**
* @brief This function handles External lines 9 to 5 interrupt request.
* @param None
* @retval None
*/
void EXTI15_10_IRQHandler(void)
{
if(EXTI_GetITStatus(EXTI_Line10) != RESET)
{
/* Toggle LED2 */
GPIO_SetBits(GPIOC,GPIO_Pin_4|GPIO_Pin_5|GPIO_Pin_6|GPIO_Pin_7);
printf("S4 interrupt ......\r\n");
/* Clear the EXTI line 9 pending bit */
EXTI_ClearITPendingBit(EXTI_Line10);
}
if(EXTI_GetITStatus(EXTI_Line11) != RESET)
{
/* Toggle LED1 */
GPIO_SetBits(GPIOC,GPIO_Pin_0|GPIO_Pin_1|GPIO_Pin_2|GPIO_Pin_3);
printf("S3 interrupt ......\r\n");
/* Clear the EXTI line 0 pending bit */
EXTI_ClearITPendingBit(EXTI_Line11);
}
}
#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
/**
* @}
*/
/**
* @}
*/
#ifdef __GNUC__
/* With GCC/RAISONANCE, small printf (option LD Linker->Libraries->Small printf
set to 'Yes') calls __io_putchar() */
#define PUTCHAR_PROTOTYPE int __io_putchar(int ch)
#else
#define PUTCHAR_PROTOTYPE int fputc(int ch, FILE *f)
#endif /* __GNUC__ */
/**
* @brief Retargets the C library printf function to the USART.
* @param None
* @retval None
*/
PUTCHAR_PROTOTYPE
{
/* Place your implementation of fputc here */
/* e.g. write a character to the USART */
USART_SendData(EVAL_COM1, (uint8_t) ch);
/* Loop until the end of transmission */
while (USART_GetFlagStatus(EVAL_COM1, USART_FLAG_TC) == RESET)
{}
return ch;
}
#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
触摸DS18B20，改变RGB
#include "stdio.h"
#include "stm32f10x.h"
int fputc(int ch,FILE *f);
/********************RCC配置*********************/
void RCC_Configuration(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
ErrorStatus HSEStartUpStatus; // 设置错误标志量
RCC_DeInit(); //*将外设寄存器RCC重设为初始值
RCC_HSEConfig(RCC_HSE_ON);//*打开外部高速时钟晶振HSE：
HSEStartUpStatus = RCC_WaitForHSEStartUp(); //*等待外部高速时钟晶振工作：
if(HSEStartUpStatus==SUCCESS)
{
RCC_HCLKConfig(RCC_SYSCLK_Div1);//*AHB使用系统时钟,负责外部存储器的时钟
RCC_PCLK1Config(RCC_HCLK_Div2);//*APB1 负责DA,USB,SPI,I2C,CAN，串口2345，普通TIM
RCC_PCLK2Config(RCC_HCLK_Div1);//*APB2负责AD,I/O,高级TIM,串口1
RCC_PLLConfig(RCC_PLLSource_HSE_Div1,RCC_PLLMul_9);//*设置PLL输入时钟源8x9=72M
RCC_PLLCmd(ENABLE);//*打开PLL：
while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY)==RESET);//*等待PLL工作：
RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK);//*设置系统时钟
while(RCC_GetSYSCLKSource() != 0x08);//* 判断PLL是否是系统时钟：
}
GPIO_PinRemapConfig(GPIO_Remap_SWJ_JTAGDisable,ENABLE);//改变管脚的映射SWJ使能，禁用JTAG，选择用于事件输出的GPIO端口
/**蜂鸣器*/
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOD|RCC_APB2Periph_AFIO, ENABLE); //# 使能被重新映射到GPIOD时钟和使能复用时钟功能
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC, ENABLE);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2; //#管脚号 关闭蜂鸣器
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; //#输出速度
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP; //#输入输出模式（推挽输出）
GPIO_Init(GPIOD, &GPIO_InitStructure); //#初始化
GPIO_ResetBits(GPIOD,GPIO_Pin_2);
}
void delay_us(u32 n) //延时函数
{
u8 j;
while(n--)
for(j=0;j<10;j++);
}
void delay_ms(u32 n) //延时函数
{
while(n--)
delay_us(1000);
}
/*****************************GPIO初始********************************/
void GPIO_Inits(void)
{ /*结构体初始化及开启外设时钟*/
GPIO_InitTypeDef GPIO_InitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC, ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOD, ENABLE);
/*GPIOA--RGB初始化*/
GPIO_InitStructure.GPIO_Mode=GPIO_Mode_Out_PP;
GPIO_InitStructure.GPIO_Pin=GPIO_Pin_1|GPIO_Pin_2|GPIO_Pin_3;
GPIO_InitStructure.GPIO_Speed=GPIO_Speed_50MHz;
GPIO_Init(GPIOA,&GPIO_InitStructure);
GPIO_SetBits(GPIOA,GPIO_Pin_1|GPIO_Pin_2|GPIO_Pin_3)
}
/**************************DS18B20**********************/
uint8_t DS18B20_Init(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC, ENABLE);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_OD;GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOC, &GPIO_InitStructure);
Set_B20();
DS18B20_Rst();
return DS18B20_Presence ();
}
static void DS18B20_Mode_IPU(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC, ENABLE);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
GPIO_Init(GPIOC, &GPIO_InitStructure);
}
static void DS18B20_Mode_Out_PP(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC, ENABLE);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOC, &GPIO_InitStructure);
}
static void DS18B20_Rst(void)
{
/* 主机设置为输出 */
DS18B20_Mode_Out_PP();
Reset_B20() ;
/* 主机至少产生480us的低电平复位信号 */
delay_us(700);
/* 主机在产生复位信号后，需将总线拉高 */
Set_B20() ;
/*从机接收到主机的复位信号后，会在15~60us后给主机发一个存在脉冲*/
delay_us(15);
}
static uint8_t DS18B20_Presence(void)
{
uint8_t pulse_time = 0;
/* 主机设置为上拉输入 */
DS18B20_Mode_IPU();
/* 等待存在脉冲的到来，存在脉冲为一个60~240us的低电平信号
* 如果存在脉冲没有来则做超时处理，从机接收到主机的复位信号后，会在15~60us后给主机发一个存在脉冲
*/
while( Read_B20() && pulse_time<100 )
{
pulse_time++;
delay_us(1);
}
/* 经过100us后，存在脉冲都还没有到来*/
if( pulse_time >=100 )
return 1;
else
pulse_time = 0;
/* 存在脉冲到来，且存在的时间不能超过240us */
while( !Read_B20() && pulse_time<240 )
{
pulse_time++;
delay_us(1);
}
if( pulse_time >=240 )
return 1;
else
return 0;
}
static uint8_t DS18B20_ReadBit(void)
{
uint8_t dat;
/* 读0和读1的时间至少要大于60us */
DS18B20_Mode_Out_PP();
/* 读时间的起始：必须由主机产生 >1us <15us 的低电平信号 */
Reset_B20();
delay_us(10);
/* 设置成输入，释放总线，由外部上拉电阻将总线拉高 */
DS18B20_Mode_IPU();
//Delay_us(2);
if( Read_B20() == SET )
dat = 1;
else
dat = 0;
/* 这个延时参数请参考时序图 */
delay_us(45);
return dat;
}
static uint8_t DS18B20_ReadByte(void)
{
uint8_t i, j, dat = 0;
for(i=0; i<8; i++)
{
j = DS18B20_ReadBit();
dat = (dat) | (j<<i);
}
return dat;
}
static void DS18B20_WriteByte(uint8_t dat)
{
uint8_t i, testb;
DS18B20_Mode_Out_PP();
for( i=0; i<8; i++ )
{
testb = dat&0x01;
dat = dat>>1;
/* 写0和写1的时间至少要大于60us */
if (testb)
{
Reset_B20();
/* 1us < 这个延时 < 15us */
delay_us(8);
Set_B20();
delay_us(58);
}
else
{
Reset_B20();
/* 60us < Tx 0 < 120us */
delay_us(70);
Set_B20();
/* 1us < Trec(恢复时间) < 无穷大*/
delay_us(2);
}
}
}
static void DS18B20_SkipRom ( void )
{
DS18B20_Rst();
DS18B20_Presence();
DS18B20_WriteByte(0XCC); /* 跳过 ROM */
}
static void DS18B20_MatchRom ( void )
{
DS18B20_Rst();
DS18B20_Presence();
DS18B20_WriteByte(0X55); /* 匹配 ROM */
}
float DS18B20_GetTemp_SkipRom ( void )
{
uint8_t tpmsb, tplsb;
short s_tem;
float f_tem;
DS18B20_SkipRom ();
DS18B20_WriteByte(0X44); /* 开始转换 */
DS18B20_SkipRom ();
DS18B20_WriteByte(0XBE); /* 读温度值 */
tplsb = DS18B20_ReadByte();
tpmsb = DS18B20_ReadByte();
s_tem = tpmsb<<8;
s_tem = s_tem | tplsb;
if( s_tem < 0 ) /* 负温度 */
f_tem = (~s_tem+1) * 0.0625;
else
f_tem = s_tem * 0.0625;
return f_tem;
}
void DS18B20_ReadId ( uint8_t * ds18b20_id )
{
uint8_t uc;
DS18B20_WriteByte(0x33); //读取序列号
for ( uc = 0; uc < 8; uc ++ )
ds18b20_id [ uc ] = DS18B20_ReadByte();
}
float DS18B20_GetTemp_MatchRom ( uint8_t * ds18b20_id )
{
uint8_t tpmsb, tplsb, i;
short s_tem;
float f_tem;
DS18B20_MatchRom (); //匹配ROM
for(i=0;i<8;i++)
DS18B20_WriteByte ( ds18b20_id [ i ] );
DS18B20_WriteByte(0X44); /* 开始转换 */
DS18B20_MatchRom (); //匹配ROM
for(i=0;i<8;i++)
DS18B20_WriteByte ( ds18b20_id [ i ] );
DS18B20_WriteByte(0XBE); /* 读温度值 */
tplsb = DS18B20_ReadByte();
tpmsb = DS18B20_ReadByte();
s_tem = tpmsb<<8;
s_tem = s_tem | tplsb;
if( s_tem < 0 ) /* 负温度 */
f_tem = (~s_tem+1) * 0.0625;
else
f_tem = s_tem * 0.0625;
return f_tem;
}
int main()
{
uint8_t uc, ucDs18b20Id [ 8 ];
RCC_Configuration();
GPIO_Inits();
USART_int(9600);
while( DS18B20_Init() )
printf("\r\n no ds18b20 exit \r\n");
printf("\r\n Yes ds18b20 \r\n");
DS18B20_ReadId ( ucDs18b20Id ); // 读取 DS18B20 的序列号
printf("\r\nDS18B20的序列号是： 0x");
for ( uc = 0; uc < 8; uc ++ ) // 打印 DS18B20 的序列号
printf ( "%.2x", ucDs18b20Id [ uc ] );
for(;;)
{
static unsigned int i=0;
float a,b;
if(i==10)
{
printf ( "\r\n第10秒：温度： %.1f\r\n", DS18B20_GetTemp_MatchRom ( ucDs18b20Id ) ); // 打印通过 DS18B20 序列号获取的温度值
a=DS18B20_GetTemp_MatchRom ( ucDs18b20Id );
delay_ms(1000); /* 1s 读取一次温度值 */
i++;
}
else{}
if(i<10)
{
printf ( "\r\n温度： %.1f\r\n", DS18B20_GetTemp_MatchRom ( ucDs18b20Id ) ); // 打印通过 DS18B20 序列号获取的温度值
delay_ms(1000); /* 1s 读取一次温度值 */
i++;
}
if(i>10)
{
printf ( "\r\n10秒后：温度： %.1f\r\n", DS18B20_GetTemp_MatchRom ( ucDs18b20Id ) ); // 打印通过 DS18B20 序列号获取的温度值
b=DS18B20_GetTemp_MatchRom ( ucDs18b20Id );
delay_ms(1000); /* 1s 读取一次温度值 */
i++;
if((b-a)>0.9)
{GPIO_ResetBits(GPIOA,GPIO_Pin_1|GPIO_Pin_2|GPIO_Pin_3);
}
else{}
if((b-a)<0.9)
{
GPIO_SetBits(GPIOA,GPIO_Pin_1|GPIO_Pin_2|GPIO_Pin_3);
}
else{}
}
else{}
}
}
int fputc(int ch,FILE *f)
{
USART_SendData(USART1, (uint8_t) ch);
while (USART_GetFlagStatus(USART1, USART_FLAG_TC) == RESET)
{}
return ch;
}
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