/* Includes ------------------------------------------------------------------*/ 03.#include "stm32f10x.h" 04.#include "stm32_eval.h" 05.#include 06. 07.volatile int flag; 08.#define Set_B20() GPIO_SetBits(GPIOC, GPIO_Pin_12) //上拉关闭PC12 09.#define Reset_B20() GPIO_ResetBits(GPIOC, GPIO_Pin_12) //下拉打开PC12 10.#define Read_B20() GPIO_ReadInputDataBit(GPIOC,GPIO_Pin_12) //读PC12状态 11.unsigned char Error_Flag=0; 12.unsigned char zf=0; 13.void SysTick_Configuration(void) 14.{ 15. /* Setup SysTick Timer for 10 msec interrupts */ 16. if (SysTick_Config(48000)) //SysTick配置 17. { 18. /* Capture error */ 19. while (1); 20. } 21. /* Configure the SysTick handler priority */ 22. NVIC_SetPriority(SysTick_IRQn, 0x0); //SysTick中断优先级 23.} 24. 25. 26./** @addtogroup STM32F10x_StdPeriph_Examples 27. * @{ 28. */ 29. 30./** @addtogroup EXTI_Config 31. * @{ 32. */ 33. 34./* Private typedef -----------------------------------------------------------*/ 35./* Private define ------------------------------------------------------------*/ 36./* Private macro -------------------------------------------------------------*/ 37./* Private variables ---------------------------------------------------------*/ 38.GPIO_InitTypeDef GPIO_InitStructure; //结构体的命名 39.USART_InitTypeDef USART_InitStructure; //结构体的命名 40.USART_ClockInitTypeDef USART_ClockInitStructure; //结构体的命名 41. 42.void RCC_Configuration(void) 43.{ 44. RCC_DeInit(); //将外设RCC的所有寄存器重新设为缺省值 45. 46. RCC_HSICmd(ENABLE); //使能内部高速晶振 47. while(RCC_GetFlagStatus(RCC_FLAG_HSIRDY) == RESET); //当SHI晶振就绪则重新设定 48. 49. RCC_SYSCLKConfig(RCC_SYSCLKSource_HSI); //设置系统时钟，选择SHI时钟为系统时钟 50. 51. RCC_HSEConfig(RCC_HSE_OFF); //设置外部高速晶振，HSE晶振OFF 52. RCC_LSEConfig(RCC_LSE_OFF); //设置外部低速晶振，LSE晶振OFF 53. 54. //******配置PLL时钟频率为48MHZ*******// 55. 56. RCC_PLLConfig(RCC_PLLSource_HSI_Div2,RCC_PLLMul_8); //RCC_PLLMul_x 即设置PLL时钟频率为 6*x MHz 57. 58. //************************************// 59. 60. RCC_PLLCmd(ENABLE); ////*******************使能PLL 61. while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET); //PLL就绪 62. RCC_ADCCLKConfig(RCC_PCLK2_Div4); // ADC时钟=PCLK/2 63. RCC_PCLK2Config(RCC_HCLK_Div1); // APB2时钟=HCLK 64. RCC_PCLK1Config(RCC_HCLK_Div2); /// APB1时钟=HCLK/2 65. RCC_HCLKConfig(RCC_SYSCLK_Div1); // AHB时钟=系统时钟 66. RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK); // 选择PLL为系统时钟 67. while(RCC_GetSYSCLKSource() != 0x08); //当PLL不是系统时钟 68. 69. 70.// SystemInit(); 71. 72. RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOD|RCC_APB2Periph_AFIO, ENABLE); //使能APB2外设时钟/****GPIOD时钟和功能复用IO时钟***/ 73. GPIO_PinRemapConfig(GPIO_Remap_SWJ_JTAGDisable,ENABLE);//disable JTAG SW_DP使能 74.RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOD|RCC_APB2Periph_AFIO, ENABLE); 75. GPIO_PinRemapConfig(GPIO_Remap_SWJ_JTAGDisable,ENABLE);//disable JTAG 76. GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2; // //选择设置GPIO管脚 77. GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; ////设置管脚速率 78. GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP; ////设置管脚工作状态，此为推挽输出 79. GPIO_Init(GPIOD, &GPIO_InitStructure); //初始化GPIOD 80. GPIO_ResetBits(GPIOD,GPIO_Pin_2); //上拉关闭蜂鸣器 81. RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC|RCC_APB2Periph_AFIO, ENABLE); 82. GPIO_PinRemapConfig(GPIO_Remap_SWJ_JTAGDisable,ENABLE);//disable JTAG 83. 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;//LED 84. GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; 85. GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP; 86. GPIO_Init(GPIOC, &GPIO_InitStructure); 87. 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); // GPIOC.0到GPIOC.7输出胃叩缙姜 88. RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE); //使能TIM2时钟 89.} 90. 91.void USART_int(long BaudRate) 92.{ 93. RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA|RCC_APB2Periph_USART1,ENABLE);//使能GPIOA、USART1外设时钟 94. GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9; 95. GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; //GPIO的输出速率为50MHz 96. GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; 97. GPIO_Init(GPIOA, &GPIO_InitStructure); 98. /* PA10 USART1_Rx */ 99. GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10; 100. GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING; //使能外设GPIOC端口时钟 101. GPIO_Init(GPIOA, &GPIO_InitStructure); 102. /* USARTx configured as follow: 103. - BaudRate = 115200 baud 104. - Word Length = 8 Bits 105. - One Stop Bit 106. - No parity 107. - Hardware flow control disabled (RTS and CTS signals) 108. - Receive and transmit enabled 109. */ 110. USART_InitStructure.USART_BaudRate = BaudRate;//设置USART传输波特率 BaudRate = 9600 可以直接写9600 111. USART_InitStructure.USART_WordLength = USART_WordLength_8b;//一帧传输或者接收的数据位数为8bit 112. USART_InitStructure.USART_StopBits = USART_StopBits_1;//在帧结尾传输一个停止位 113. USART_InitStructure.USART_Parity = USART_Parity_No;//奇偶模式失能 114. USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;//硬件流控制失能 115. USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;//使能接收发模式 116. USART_ClockInitStructure.USART_Clock = USART_Clock_Disable; //时钟低电平活动 117. USART_ClockInitStructure.USART_CPOL = USART_CPOL_Low; //引脚时钟输出低电平时钟 118. USART_ClockInitStructure.USART_CPHA = USART_CPHA_2Edge; //第二个时钟边沿开始捕获数据 119. USART_ClockInitStructure.USART_LastBit = USART_LastBit_Disable;//最后一位数据的时钟脉冲不从SCLK输出 120. USART_ClockInit(USART1, &USART_ClockInitStructure); //引用结构体的成员 121. USART_Init(USART1, &USART_InitStructure);//USART1初始化 122. USART_Cmd(USART1, ENABLE);//使能USART1时钟外设 123. USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);//使能接受中断 124. USART_Cmd(USART1, ENABLE); //使能 USART 125.} 126. 127.void delay_18b20(u32 nus) //18b20按照严格的时序工作，这是特定的一个延时函数（自定义） 128.{ 129. u16 i; 130. while(nus--) 131. for(i=12;i>0;i--); 132.} 133. 134. 135. 136.void Init18B20(void) //18B20初始化 137.{ 138. u8 aa=0; 139. u8 count =0; 140. RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC, ENABLE);//使能PC时钟 141. GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12; //配置端口GPIOC.12 142. GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_OD;//开漏输出 143. GPIO_Init(GPIOC, &GPIO_InitStructure); //引用结构体的变量 144. Set_B20() ; // GPIO_SetBits(GPIOC, GPIO_Pin_12) 145. delay_18b20(1); 146. Reset_B20(); //重置18B20 147. 148. 149. delay_18b20(480); 150. Set_B20(); 151.// delay_18b20(500); 152. delay_18b20(480); 153. 154. count=0; 155. aa=Read_B20(); //温度读取 156. /****个人认为限制温度不超过99度，作为一个保护*/ 157. while(!aa && count<100) //判断aa的非和计数器count的值是否都小于100 158. { 159. aa=Read_B20(); // 160. count++; //count自加1 161. } 162. if(count>=99) 163. Error_Flag=1; //错误返回值1 164. else 165. Error_Flag=0; //错误返回值0 166. 167.} 168. 169.unsigned char Read18B20(void)//按位读取数据 170.{ 171.unsigned char i=0; 172.unsigned char date=0; 173.u8 tempp; 174. for(i=8;i>0;i--) 175. { 176. 177. Reset_B20(); //打开PC12 178. date>>=1; //标志右移一位 179. delay_18b20(1); 180. Set_B20(); //关闭 181. delay_18b20(1); 182. tempp=Read_B20(); //读取温度 183. 184. if(tempp) //判断tempp是否为1 185. date|=0x80; // 1000 0000 将最高位填1 ，然后右移，每次最高位由0变1，使8位全部传递完毕 0xff = 1111 1111 186. delay_18b20(60); //延时 187. } 188. return(date); //返回值是无符号的字符型的类型 date 189.} 190.void Write18B20(unsigned char date)//向18b20写数据 191.{ 192. unsigned char i=0; 193. 194. for (i=8; i>0; i--) 195. { 196. Reset_B20(); 197. delay_18b20(1); 198. if(date & 0x01) 199. { 200. Set_B20(); 201. } 202. else 203. { Reset_B20();} 204. delay_18b20(60); 205. date>>=1; 206. Set_B20(); 207. delay_18b20(1); 208. 209. } 210. delay_18b20(15); 211.} 212. 213. float Read_T()//读温度 214.{ 215. unsigned char TUp,TDown; 216. unsigned char fTemp; 217. u8 TT=0; 218. 219. float Temp = 0; 220. Init18B20(); 221. Write18B20(0xcc); 222. Write18B20(0x44); 223. Init18B20(); 224. Write18B20(0xcc); 225. Write18B20(0xbe); 226. TDown = Read18B20(); 227. TUp = Read18B20(); 228. 229. if(TUp>0x7f) 230. { 231. TDown=~TDown; 232. TUp=~TUp+1; 233. TUp/=8; 234. zf=1; 235. } 236. else 237. zf=0; 238. 239. fTemp=TDown&0x0f; 240. TUp<<=4; 241. TDown>>=4; 242. TT=TUp|TDown; 243. Temp=TT+(float)fTemp/16; 244. return(Temp); 245.} 246. 247.int main(void) 248.{ 249. 250. /*!< At this stage the microcontroller clock setting is already configured, 251. this is done through SystemInit() function which is called from startup 252. file (startup_stm32f10x_xx.s) before to branch to application main. 253. To reconfigure the default setting of SystemInit() function, refer to 254. system_stm32f10x.c file 255. */ 256. 257. /* System Clocks Configuration */ 258. char AddressID[10]; //定义一个字符型数组，长度为10 259. int i; 260. RCC_Configuration(); //配置RCC时钟 261. USART_int(115200); //波特率的设置 262. SysTick_Configuration(); //系统滴答时钟的调用 263. printf(" config done...\r\n"); //打印输出 264. //delay_ms(1000); 265. 266. Init18B20(); //初始化18b20； 267. Write18B20(0x34); //写入读取地址的命令 268. delay_18b20(20); //延时 269. 270. while(1) 271. { 272. if(flag == 300) //判断flag是否等于300 273. { 274. printf(" the AddressID is:") ; 275. for(i=0;i<10;i++) //字符不能直接输出，要按位输出 276. { 277. AddressID[i] = Read18B20();//读取地址 278. printf("%u", AddressID[i]);//输出地址 279. } 280. printf("\r\n") ; //换行 281. } 282. if(flag == 500) //判断flag是否等于500 283. { 284. printf("The Temperature is:%f\r\n",Read_T());//读取温度并输出 285. 286. printf("===================================================\r\n"); 287. } 288. } 289.} 290. 291. 292. 293.#ifdef USE_FULL_ASSERT 294. 295./** 296. * @brief Reports the name of the source file and the source line number 297. * where the assert_param error has occurred. 298. * @param file: pointer to the source file name 299. * @param line: assert_param error line source number 300. * @retval None 301. */ 302.void assert_failed(uint8_t* file, uint32_t line) 303.{ 304. /* User can add his own implementation to report the file name and line number, 305. ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */ 306. 307. /* Infinite loop */ 308. while (1) 309. { 310. } 311.} 312. 313.#endif 314. 315./** 316. * @} 317. */ 318. 319./** 320. * @} 321. */ 322. 323.#ifdef __GNUC__ 324. /* With GCC/RAISONANCE, small printf (option LD Linker->Libraries->Small printf 325. set to 'Yes') calls __io_putchar() */ 326. #define PUTCHAR_PROTOTYPE int __io_putchar(int ch) 327.#else 328. #define PUTCHAR_PROTOTYPE int fputc(int ch, FILE *f) 329.#endif /* __GNUC__ */ 330. 331. 332. 333./** 334. * @brief Retargets the C library printf function to the USART. 335. * @param None 336. * @retval None 337. */ 338.PUTCHAR_PROTOTYPE 339.{ 340. /* Place your implementation of fputc here */ 341. /* e.g. write a character to the USART */ 342. USART_SendData(EVAL_COM1, (uint8_t) ch); 343. 344. /* Loop until the end of transmission */ 345. while (USART_GetFlagStatus(EVAL_COM1, USART_FLAG_TC) == RESET) 346. {} 347. 348. return ch; 349.} 350. 351.#ifdef USE_FULL_ASSERT 352. 353./** 354. * @brief Reports the name of the source file and the source line number 355. * where the assert_param error has occurred. 356. * @param file: pointer to the source file name 357. * @param line: assert_param error line source number 358. * @retval None 359. */ 360.void assert_failed(uint8_t* file, uint32_t line) 361.{ 362. /* User can add his own implementation to report the file name and line number, 363. ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */ 364. 365. /* Infinite loop */ 366. while (1) 367. { 368. } 369.} 370. 371.#endif
