嵌入式系统及原理作业
第一次作业软件安装：http://forum.eepw.com.cn/thread/277763/1#2
第二次作业流水灯：http://forum.eepw.com.cn/thread/277763/1#4
第三次作业数码管显示0-99：http://forum.eepw.com.cn/thread/277763/1#5
第四次作业串口输入0-99：http://forum.eepw.com.cn/thread/277763/1#7
第五次作业定时器控制流水灯：http://forum.eepw.com.cn/thread/277763/1#8
第六次作业记录开机次数（IIC上电计数）：http://forum.eepw.com.cn/thread/277763/1#9
触摸DS18B02使灯的颜色发生变化 ：http://forum.eepw.com.cn/thread/277763/1#10
首先，双击mdk472_a.exe
接着就会出现以下的界面
选择Next,之后选择可以安装目录了 ~
接着。。。
再然后就是漫长的安装过程 ~ ~
等啊等啊 ~~
Next Next 之后去掉以下的两个钩钩，就可以finsh啦
最后就是要和谐啦，打开安装好的软件，按照以下路径打开License
将里面的CID复制到和谐文件的对应位置，并在Target里选择ARM
多点几次Generate，将里面的内容复制到License Management里New License ID Code（LIC）里，然后点击Add LIC，就可以啦 ~
依次点亮 D1-D8：
#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);
}
/*初始化GPIO*/
void GPIO_INIT()
{
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC, ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, 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; //管脚最高输出速率为50M
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_Init(GPIOC, &GPIO_InitStructure);
GPIO_Init(GPIOA, &GPIO_InitStructure);
}
/*微秒延时函数*/
void delay_us(u32 n)
{
u8 j;
while(n--)
for(j=0;j<10;j++);
}
/*毫秒延时函数*/
void delay_ms(u32 n)
{
while(n--)
delay_us(1000);
}
/**
* @brief Main program.
* @param None
* @retval None
*/
int main(void)
{
RCC_Configuration();
GPIO_INIT();
while(1){
GPIO_ResetBits(GPIOC,GPIO_Pin_0);
delay_ms(100);
GPIO_SetBits(GPIOC,GPIO_Pin_0);
GPIO_ResetBits(GPIOC,GPIO_Pin_1);
delay_ms(100);
GPIO_SetBits(GPIOC,GPIO_Pin_1);
GPIO_ResetBits(GPIOC,GPIO_Pin_2);
delay_ms(100);
GPIO_SetBits(GPIOC,GPIO_Pin_2);
GPIO_ResetBits(GPIOC,GPIO_Pin_3);
delay_ms(100);
GPIO_SetBits(GPIOC,GPIO_Pin_3);
GPIO_ResetBits(GPIOC,GPIO_Pin_4);
delay_ms(100);
GPIO_SetBits(GPIOC,GPIO_Pin_4);
GPIO_ResetBits(GPIOC,GPIO_Pin_5);
delay_ms(100);
GPIO_SetBits(GPIOC,GPIO_Pin_5);
GPIO_ResetBits(GPIOC,GPIO_Pin_6);
delay_ms(100);
GPIO_SetBits(GPIOC,GPIO_Pin_6);
GPIO_ResetBits(GPIOC,GPIO_Pin_7);
delay_ms(100);
GPIO_SetBits(GPIOC,GPIO_Pin_7);
}
}
数码管显示0-99：
#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;//管脚最高输出速率为50M
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_Init(GPIOD, &GPIO_InitStructure);
GPIO_ResetBits(GPIOD,GPIO_Pin_2);
}
/*初始化GPIO*/
void GPIO_INIT()
{
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC, ENABLE);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8|GPIO_Pin_9|GPIO_Pin_10;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOC, &GPIO_InitStructure);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1|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_Pin_15;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_Init(GPIOB, &GPIO_InitStructure);
}
/*微秒延时函数*/
void delay_us(u32 n)
{
u8 j;
while(n--)
for(j=0;j<10;j++);
}
/*毫秒延时函数*/
void delay_ms(u32 n)
{
while(n--)
delay_us(1000);
}
//定义一个数组来显示0-9
int table[10]={GPIO_Pin_7|GPIO_Pin_9|GPIO_Pin_12|GPIO_Pin_14|GPIO_Pin_13|GPIO_Pin_8
,GPIO_Pin_9|GPIO_Pin_12 ,GPIO_Pin_7|GPIO_Pin_9|GPIO_Pin_14|GPIO_Pin_13|GPIO_Pin_5,
GPIO_Pin_7|GPIO_Pin_9|GPIO_Pin_12|GPIO_Pin_14|GPIO_Pin_5,GPIO_Pin_9|GPIO_Pin_12|
GPIO_Pin_8|GPIO_Pin_5,GPIO_Pin_7|GPIO_Pin_12|GPIO_Pin_14|GPIO_Pin_8|GPIO_Pin_5,
GPIO_Pin_7|GPIO_Pin_12|GPIO_Pin_14|GPIO_Pin_13|GPIO_Pin_8|GPIO_Pin_5,GPIO_Pin_7|
GPIO_Pin_9|GPIO_Pin_12,
GPIO_Pin_5|GPIO_Pin_7|GPIO_Pin_8|GPIO_Pin_9|GPIO_Pin_12|GPIO_Pin_13|
GPIO_Pin_14,GPIO_Pin_5|GPIO_Pin_7|GPIO_Pin_8|GPIO_Pin_9|GPIO_Pin_12|GPIO_Pin_14
};
void shumaguan(char temp)
{
char gewei=0,shiwei=0;
shiwei=temp/10;
gewei=temp%10;
if(temp<10)
{
GPIO_SetBits(GPIOB,GPIO_Pin_1);
GPIO_ResetBits(GPIOB,table[gewei]);
delay_ms(5);
GPIO_ResetBits(GPIOB,GPIO_Pin_1);
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(temp>=10)
{
GPIO_SetBits(GPIOB,GPIO_Pin_15);
GPIO_ResetBits(GPIOB,table[shiwei]);
delay_ms(1);
GPIO_ResetBits(GPIOB,GPIO_Pin_15);
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_1);
GPIO_ResetBits(GPIOB,table[gewei]);
delay_ms(1);
GPIO_ResetBits(GPIOB,GPIO_Pin_1);
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(temp>30)
{
GPIO_SetBits(GPIOB,GPIO_Pin_15);
GPIO_ResetBits(GPIOB,table[shiwei]);
delay_ms(100);
GPIO_ResetBits(GPIOB,GPIO_Pin_15);
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_1);
GPIO_ResetBits(GPIOB,table[gewei]);
delay_ms(150);
GPIO_ResetBits(GPIOB,GPIO_Pin_1);
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);
}
}
int main(void)
{
char a = 0, b = 0,count=0; //定义3个计数器
RCC_Configuration();
GPIO_INIT();
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); //关闭数码管
while(1){
if(!GPIO_ReadInputDataBit (GPIOC,GPIO_Pin_10)) //判断按键是否按下
{
delay_ms(100);
if(!GPIO_ReadInputDataBit(GPIOC,GPIO_Pin_10))
{
count++;
}
}
if(count%2==1){
if(!GPIO_ReadInputDataBit
(GPIOC,GPIO_Pin_8))
{ delay_ms(80);
if(!GPIO_ReadInputDataBit
(GPIOC,GPIO_Pin_8))
{a++;}
}
if(a>100)
{a=0;}
shumaguan(a);
}
if(count%2==0){
if(!GPIO_ReadInputDataBit(GPIOC,GPIO_Pin_9))
{delay_ms(80);
if(!GPIO_ReadInputDataBit(GPIOC,GPIO_Pin_9)){b++;}}
if(b>100){b=0;}
shumaguan(b);}
}
}
第四次作业：串口输入0-99
每次做作业都好吃力，参阅了很多同学的代码
#include "stm32f10x.h"
#include "stm32_eval.h"
#include "stdio.h"
#include "math.h"
#define buff_size 16;
char rx_buff[], rx_buff_count=0;
GPIO_InitTypeDef GPIO_InitStructure;
USART_InitTypeDef USART_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;
USART_ClockInitTypeDef USART_ClockInitStructure;
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);//关闭蜂鸣器
}
void GPIO_INIT()
{
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);//使能PC时钟
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1|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_Pin_15;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;//推挽输出
GPIO_Init(GPIOB, &GPIO_InitStructure);//初始化PB
GPIO_SetBits(GPIOB, GPIO_Pin_1|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_Pin_15);
}
void USART_int(long BaudRate)
{ USART_InitTypeDef USART_InitStructure;
USART_ClockInitTypeDef USART_ClockInitStructure;
NVIC_InitTypeDef NVIC_InitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA|RCC_APB2Periph_USART1,ENABLE);//使能PA
USART1
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;//TX 位于PA9
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_10MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; //推挽输出
GPIO_Init(GPIOA, &GPIO_InitStructure);// TX初始化 PA9
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;// RX位于PA10
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;//悬空输入
GPIO_Init(GPIOA, &GPIO_InitStructure);//RX初始化 PA10
/* 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;//传输速率
USART_InitStructure.USART_WordLength = USART_WordLength_8b;//字长8比特
USART_InitStructure.USART_StopBits = USART_StopBits_1;//停止位1
USART_InitStructure.USART_Parity = USART_Parity_No;//
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;//流控位
为none
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;// 接受和发送
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);//初始化USART1时钟
USART_Init(USART1, &USART_InitStructure);//初始化USART1时钟
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; //选择USART1中断通道
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 15;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);//初始化中断
}
/*微秒延时函数*/
void delay_us(u32 n)
{
u8 j;
while(n--)
for(j=0;j<10;j++);
}
/*毫秒延时函数*/
void delay_ms(u32 n)
{
while(n--)
delay_us(1000);
}
void USART_SendStr(char *str) //发送字符串函数
{
while((*str)!='\0') //发送完直至最后
{USART_SendData(USART1,*str++);
while(USART_GetFlagStatus(USART1, USART_FLAG_TXE) == RESET);
}
unsigned int translate(char* pstr) //字符串
{
int s = 0;
while(*pstr != '\0') //一直扫描到字符串
{
if(*pstr >= '0' && *pstr <= '9') //字符串中有数字0-9
{
s = s * 10 + *pstr - '0';
}
pstr++;
}
return s;
}
void Num(int i)
{
switch(i)//点亮对应输入的数字
{
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 func(char *S,char LEN)
{
int m;
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);
while(1)
{
m=my_atoi(S);
GPIO_SetBits(GPIOB,GPIO_Pin_1); //打开个位数码管
Num(z%10); //点亮各位数
delay_ms(5); //延时
GPIO_ResetBits(GPIOB,GPIO_Pin_1);//关闭个位数码管
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);
GPIO_SetBits(GPIOB,GPIO_Pin_15);//打开十位数码管
Num(z/10);
delay_ms(5);
GPIO_ResetBits(GPIOB,GPIO_Pin_15);//关闭十位
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);
}
}
void input_ASK()
{
char j;
func(rx_buff,rx_buff_count);
rx_buff_count=0;
for (j=0;j<rx_buff_count;j++)
{rx_buff[j]='\0';}
// USART_SendStr("\n>");
}
int main()
{
RCC_Configuration();
GPIO_INIT();
USART_int(9600);
// USART_SendStr("Please input like: data=\r\n");
//USART_SendStr("\n>");
while(1){
}
}
void USART1_IRQHandler(void) //声明接收中断函数
{
while(USART_GetFlagStatus(USART1, USART_FLAG_RXNE) == RESET) //等待接收完毕
{
}
if(USART_ReceiveData(USART1)==0x0d) //如果接收到回车，结束输入
{input_ASK();} //执行input_ASK()
else
{
USART_SendData(USART1,USART_ReceiveData(USART1)); //将数据回送至超级终端
rx_buff[rx_buff_count]= USART_ReceiveData(USART1);
rx_buff_count++;
}
USART_ClearFlag(USART1, USART_FLAG_RXNE); //发送数据
}
}
第五次作业：定时器控制流水灯
#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;
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
TIM_OCInitTypeDef TIM_OCInitStructure;
int count=0;
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);
*/
SystemInit();
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_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);
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);
}
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;//传输速率
USART_InitStructure.USART_WordLength = USART_WordLength_8b;//字长8比特
USART_InitStructure.USART_StopBits = USART_StopBits_1;//停止位1
USART_InitStructure.USART_Parity = USART_Parity_No;
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;//接受和发送
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);//初始化USART1时钟
USART_Init(USART1, &USART_InitStructure);
USART_Cmd(USART1, ENABLE);
USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);
USART_Cmd(USART1, ENABLE);
}
void NVIC_Configuration(void)
{
NVIC_InitTypeDef NVIC_InitStructure;
NVIC_InitStructure.NVIC_IRQChannel = TIM2_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
}
/* 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
*/
/* System Clocks Configuration */
RCC_Configuration();
NVIC_Configuration();
TIM_TimeBaseStructure.TIM_Period = 36000;
TIM_TimeBaseStructure.TIM_Prescaler = 100;
TIM_TimeBaseStructure.TIM_ClockDivision = 0;
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;//计数方式
TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure);//初始化TIM2
TIM_ITConfig(TIM2,TIM_IT_Update,ENABLE );
TIM_Cmd(TIM2, ENABLE);//使能
while(1){}
}
void TIM2_IRQHandler(void)
{
if (TIM_GetITStatus(TIM2, TIM_IT_Update) != RESET)
{
TIM_ClearITPendingBit(TIM2, TIM_IT_Update );
count++;
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);
if(count==1) GPIO_ResetBits(GPIOC,GPIO_Pin_0);
if(count==2) GPIO_ResetBits(GPIOC,GPIO_Pin_1);
if(count==3) GPIO_ResetBits(GPIOC,GPIO_Pin_2);
if(count==4) GPIO_ResetBits(GPIOC,GPIO_Pin_3);
if(count==5) GPIO_ResetBits(GPIOC,GPIO_Pin_4);
if(count==6) GPIO_ResetBits(GPIOC,GPIO_Pin_5);
if(count==7) GPIO_ResetBits(GPIOC,GPIO_Pin_6);
if(count==8) GPIO_ResetBits(GPIOC,GPIO_Pin_7);
if(count==9) count=0;
}
}
第六次作业：记录开机次数（IIC上电计数）
#include "stm32f10x.h"
#include "stm32_eval.h"
#include "STM32_I2C.h"
#include <stdio.h>
GPIO_InitTypeDef GPIO_InitStructure;
USART_InitTypeDef USART_InitStructure;
USART_ClockInitTypeDef USART_ClockInitStructure;
EXTI_InitTypeDef EXTI_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;
unsigned char i=0;
void EXTIkeyS1_Config(void);
/*delay_us*/
void delay_us(u32 n)
{
u8 j;
while(n--)
for(j=0;j<10;j++);
}
/*delay_ms*/
void delay_ms(u32 n)
{
while(n--)
delay_us(1000);
}
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)
//SystemInit();
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_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);
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);
}
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_50MHz;
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;//传输速率
USART_InitStructure.USART_WordLength = USART_WordLength_8b;//字长8bit
USART_InitStructure.USART_StopBits = USART_StopBits_1;//停止位1
USART_InitStructure.USART_Parity = USART_Parity_No;
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;//接受和发送
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);
}
void Iic1_Init(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
I2C_InitTypeDef I2C_InitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);
RCC_APB1PeriphClockCmd(RCC_APB1Periph_I2C2, ENABLE);
//PB6-I2C2_SCL PB7-I2C2_SDA PB10-I2C2_SCL PB11-I2C2_SDA
/* Configure IO connected to IIC*********************/
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10 | GPIO_Pin_11;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_OD;
GPIO_Init(GPIOB, &GPIO_InitStructure);
I2C_InitStructure.I2C_Mode = I2C_Mode_I2C;
I2C_InitStructure.I2C_DutyCycle = I2C_DutyCycle_2;//Tlov/Thigh=2
I2C_InitStructure.I2C_OwnAddress1 = 0xA0;//作为从机时的地址
I2C_InitStructure.I2C_Ack = I2C_Ack_Enable;//使能I2C的应答
I2C_InitStructure.I2C_AcknowledgedAddress = I2C_AcknowledgedAddress_7bit;//应答7位的地址
I2C_InitStructure.I2C_ClockSpeed = 400000;//I2C速率为400KHz（快速模式）
I2C_Cmd(I2C2, ENABLE);
I2C_Init(I2C2, &I2C_InitStructure);
I2C_AcknowledgeConfig(I2C2, ENABLE);
}
void I2C2_WriteByte(unsigned char id,unsigned char write_address,unsigned char byte)
{
while(I2C_GetFlagStatus(I2C2, I2C_FLAG_BUSY));//等待I2C
I2C_GenerateSTART(I2C2,ENABLE);//产生起始信号
while(!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_MODE_SELECT));//确定主机模式是否成功（检测EV5）EV5
I2C_Send7bitAddress(I2C2,id,I2C_Direction_Transmitter);//发送器件地址（写）
while(!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED));//检测主机传输模式是否成功（检测EV6）EV6
I2C_SendData(I2C2, write_address);//通过外设I2C发送地址
while(!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_BYTE_TRANSMITTED));//检测主机发送的字节是否成功（检测EV8）EV8
I2C_SendData(I2C2, byte);//通过外设T2C发送数据
while(!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_BYTE_TRANSMITTED));//检测主机发送的字节是否成功（检测EV8）
I2C_GenerateSTOP(I2C2, ENABLE);//产生I2C2传输STOP条件
do
{
/* Send START condition */
I2C_GenerateSTART(I2C2, ENABLE); //产生I2C2传输的START条件
/* Read I2C2 SR1 register */
/* Send EEPROM address for write */
I2C_Send7bitAddress(I2C2, 0xA0, I2C_Direction_Transmitter);
}while(!(I2C_ReadRegister(I2C2, I2C_Register_SR1) & 0x0002)); //地址发送结束
/* Clear AF flag */
I2C_ClearFlag(I2C2, I2C_FLAG_AF);//清除I2Cx的应答错误标志位
/* STOP condition */
I2C_GenerateSTOP(I2C2, ENABLE);//产生I2C2传输START条件
}
unsigned char I2C2_ReadByte(unsigned char id, unsigned char read_address)
{
unsigned char temp;
while(I2C_GetFlagStatus(I2C2, I2C_FLAG_BUSY))//等待I2C空闲
{}
I2C_GenerateSTART(I2C2, ENABLE);//写模式
while(!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_MODE_SELECT));
I2C_Send7bitAddress(I2C2, id, I2C_Direction_Transmitter);
while(!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_TRANSMITTER_MODE_SELECTED));
I2C_Cmd(I2C2, ENABLE);
I2C_SendData(I2C2, read_address);
while(!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_BYTE_TRANSMITTED));
I2C_GenerateSTART(I2C2, ENABLE);
while(!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_MODE_SELECT));
I2C_Send7bitAddress(I2C2, id, I2C_Direction_Receiver);//读模式
while(!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_RECEIVER_MODE_SELECTED));//等待读取事件，在读取数据
I2C_AcknowledgeConfig(I2C2, DISABLE); //关闭应答和停止条件产生
I2C_GenerateSTOP(I2C2, ENABLE);
while(!(I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_BYTE_RECEIVED)));
temp = I2C_ReceiveData(I2C2);
I2C_AcknowledgeConfig(I2C2, ENABLE);
return temp;
}
void EXTIkeyS1_Config(void)//S1
{
/* Enable GPIOA clock */
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC, ENABLE);
/* Configure PA.00 pin as input floating */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8;//S1
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_Init(GPIOC, &GPIO_InitStructure);
/* Enable AFIO clock */
RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO, ENABLE);
GPIO_EXTILineConfig(GPIO_PortSourceGPIOC, GPIO_PinSource8);
EXTI_InitStructure.EXTI_Line = EXTI_Line8;
EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;
EXTI_InitStructure.EXTI_LineCmd = ENABLE;
EXTI_Init(&EXTI_InitStructure);
NVIC_InitStructure.NVIC_IRQChannel = EXTI9_5_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x0F;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x0F;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
}
void EXTI9_5_IRQHandler(void)
{
if(EXTI_GetITStatus(EXTI_Line8) != RESET)
{
i=0;
I2C2_WriteByte(0xA0,0,0);
printf(" 按键清%d\r\n",i);
/* Clear the EXTI line 8 pending bit */
EXTI_ClearITPendingBit(EXTI_Line8);
}
}
int main(void)
{
RCC_Configuration();
EXTIkeyS1_Config();
USART_int(115200);
Iic1_Init();
printf(" config done...\r\n");
i = I2C2_ReadByte(0xA0,0);//
printf("write data to address:%d\r\n",i);
i++;
I2C2_WriteByte(0xA0,0,i);//
printf("Reading data from address:%d\r\n",i);
while(1)
{
delay_ms(2000);
printf(" 上电计数:%d\r\n",i);
}
}
#ifdef USE_FULL_ASSERT
void assert_failed(uint8_t* file, uint32_t line)
{
while (1)
{
}
}
#endif
#ifdef __GNUC__
#define PUTCHAR_PROTOTYPE int __io_putchar(int ch)
#else
#define PUTCHAR_PROTOTYPE int fputc(int ch, FILE *f)
#endif /* __GNUC__ */
PUTCHAR_PROTOTYPE
{
USART_SendData(EVAL_COM1, (uint8_t) ch);
while (USART_GetFlagStatus(EVAL_COM1, USART_FLAG_TC) == RESET)
{}
return ch;
}
#ifdef USE_FULL_ASSERT
void assert_failed(uint8_t* file, uint32_t line)
{
while (1)
{
}
}
#endif
触摸DS18B02使灯的颜色发生变化
#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;
RCC_DeInit();
RCC_HSEConfig(RCC_HSE_ON);
HSEStartUpStatus = RCC_WaitForHSEStartUp();
if(HSEStartUpStatus==SUCCESS)
{
RCC_HCLKConfig(RCC_SYSCLK_Div1);
RCC_PCLK1Config(RCC_HCLK_Div2);
RCC_PCLK2Config(RCC_HCLK_Div1);
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);
}
GPIO_PinRemapConfig(GPIO_Remap_SWJ_JTAGDisable,ENABLE);
/*****蜂鸣器*****/
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOD|RCC_APB2Periph_AFIO, ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC, ENABLE);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2; //管脚号
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
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() ;
delay_us(700);
Set_B20() ;
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();
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();
Reset_B20();
delay_us(10);
DS18B20_Mode_IPU();
//Delay_us(2);
if( Read_B20() == SET )
dat = 1;
else
dat = 0;
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();
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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