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36时钟滴答代码

yubuyanhui
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2014-12-25 23:13:25     打赏
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  1. /**
  2. ******************************************************************************
  3. * @file EXTI/EXTI_Config/main.c
  4. * @author MCD Application Team
  5. * @version V3.5.0
  6. * @date 08-April-2011
  7. * @brief Main program body
  8. ******************************************************************************
  9. * @attention
  10. *
  11. * THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS
  12. * WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE
  13. * TIME. AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY
  14. * DIRECT, INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING
  15. * FROM THE CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE
  16. * CODING INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
  17. *
  18. *
  20. ?COPYRIGHT 2011 STMicroelectronics
  22. ******************************************************************************
  23. */
  25. /* Includes ------------------------------------------------------------------*/
  26. #include "stm32f10x.h"
  27. #include "stm32_eval.h"
  28. //#include "delay.h"
  29. #include <stdio.h>
  30. volatile int flag;
  31. #define Set_B20() GPIO_SetBits(GPIOC, GPIO_Pin_12)
  32. #define Reset_B20() GPIO_ResetBits(GPIOC, GPIO_Pin_12)
  33. #define Read_B20() GPIO_ReadInputDataBit(GPIOC,GPIO_Pin_12)
  34. unsigned char Error_Flag=0;
  35. unsigned char zf=0;
  36. void SysTick_Configuration(void)
  37. {
  38. /* Setup SysTick Timer for 10 msec interrupts */
  39. if (SysTick_Config(48000)) //SysTick??
  40. {
  41. /* Capture error */
  42. while (1);
  43. }
  44. /* Configure the SysTick handler priority */
  45. NVIC_SetPriority(SysTick_IRQn, 0x0); //SysTick?????
  46. }
  49. /** @addtogroup STM32F10x_StdPeriph_Examples
  50. * @{
  51. */
  53. /** @addtogroup EXTI_Config
  54. * @{
  55. */
  57. /* Private typedef -----------------------------------------------------------*/
  58. /* Private define ------------------------------------------------------------*/
  59. /* Private macro -------------------------------------------------------------*/
  60. /* Private variables ---------------------------------------------------------*/
  61. GPIO_InitTypeDef GPIO_InitStructure;
  62. USART_InitTypeDef USART_InitStructure;
  63. USART_ClockInitTypeDef USART_ClockInitStructure;
  65. void RCC_Configuration(void)
  66. {
  67. RCC_DeInit();
  69. RCC_HSICmd(ENABLE);
  70. while(RCC_GetFlagStatus(RCC_FLAG_HSIRDY) == RESET);
  72. RCC_SYSCLKConfig(RCC_SYSCLKSource_HSI);
  74. RCC_HSEConfig(RCC_HSE_OFF);
  75. RCC_LSEConfig(RCC_LSE_OFF);
  77. //******48MHZ*******//
  79. RCC_PLLConfig(RCC_PLLSource_HSI_Div2,RCC_PLLMul_6);//6*8=24MHz
  81. //************************************//
  83. RCC_PLLCmd(ENABLE);
  84. while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET); //检查指定的RCC标志位（PLL）设置与否
  85. RCC_ADCCLKConfig(RCC_PCLK2_Div4); //设置ADC时钟频率
  86. RCC_PCLK2Config(RCC_HCLK_Div1); // APB2=HCLK/1 PCLK2=HCLK/1
  87. RCC_PCLK1Config(RCC_HCLK_Div2); /// APB1=HCLK/2 PCLK1=HCLK/2
  88. RCC_HCLKConfig(RCC_SYSCLK_Div1); // AHB使用系统时钟 HCLK=SYSCLK
  89. RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK); // 配置系统时钟
  90. while(RCC_GetSYSCLKSource() != 0x08) //检查是否将HES 6倍频后作为系统时钟
  93. // SystemInit();
  95. RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOD|RCC_APB2Periph_AFIO, ENABLE);
  96. GPIO_PinRemapConfig(GPIO_Remap_SWJ_JTAGDisable,ENABLE);//disable JTAG
  97. RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOD|RCC_APB2Periph_AFIO, ENABLE);
  98. GPIO_PinRemapConfig(GPIO_Remap_SWJ_JTAGDisable,ENABLE);//disable JTAG
  99. GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2;
  100. GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  101. GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
  102. GPIO_Init(GPIOD, &GPIO_InitStructure);
  103. GPIO_ResetBits(GPIOD,GPIO_Pin_2);
  104. RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC|RCC_APB2Periph_AFIO, ENABLE);
  105. GPIO_PinRemapConfig(GPIO_Remap_SWJ_JTAGDisable,ENABLE);//disable JTAG
  106. 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
  107. GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  108. GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
  109. GPIO_Init(GPIOC, &GPIO_InitStructure);
  110. 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);
  111. RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE); //TIM2
  112. }
  114. void USART_int(long BaudRate)
  115. {
  116. RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA|RCC_APB2Periph_USART1,ENABLE);
  117. GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;
  118. GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  119. GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
  120. GPIO_Init(GPIOA, &GPIO_InitStructure);
  121. /* PA10 USART1_Rx */
  122. GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
  123. GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
  124. GPIO_Init(GPIOA, &GPIO_InitStructure);
  125. /* USARTx configured as follow:
  126. - BaudRate = 115200 baud
  127. - Word Length = 8 Bits
  128. - One Stop Bit
  129. - No parity
  130. - Hardware flow control disabled (RTS and CTS signals)
  131. - Receive and transmit enabled
  132. */
  133. USART_InitStructure.USART_BaudRate = BaudRate;
  134. USART_InitStructure.USART_WordLength = USART_WordLength_8b;
  135. USART_InitStructure.USART_StopBits = USART_StopBits_1;
  136. USART_InitStructure.USART_Parity = USART_Parity_No;
  137. USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
  138. USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
  139. USART_ClockInitStructure.USART_Clock = USART_Clock_Disable;
  140. USART_ClockInitStructure.USART_CPOL = USART_CPOL_Low;
  141. USART_ClockInitStructure.USART_CPHA = USART_CPHA_2Edge;
  142. USART_ClockInitStructure.USART_LastBit = USART_LastBit_Disable;
  143. USART_ClockInit(USART1, &USART_ClockInitStructure);
  144. USART_Init(USART1, &USART_InitStructure);
  145. USART_Cmd(USART1, ENABLE);
  146. USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);
  147. USART_Cmd(USART1, ENABLE);
  148. }
  150. void delay_18b20(u32 nus) //18b20延时
  151. {
  152. u16 i;
  153. while(nus--)
  154. for(i=12;i>0;i--);
  155. }
  156. void delay_us(u32 n) //延时
  157. {
  158. u8 j;
  159. while(n--)
  160. for(j=0;j<10;j++);
  161. }
  163. void delay_ms(u32 n)
  164. {
  165. while(n--)
  166. delay_us(1000);
  167. }
  171. void Init18B20(void) //18B20
  172. {
  173. u8 aa=0;
  174. u8 count =0;
  175. RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC, ENABLE);//使能GPIOC时钟
  176. GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12;
  177. GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_OD;//开漏输出
  178. GPIO_Init(GPIOC, &GPIO_InitStructure);
  179. Set_B20() ; // GPIO_SetBits(GPIOC, GPIO_Pin_12)
  180. delay_18b20(1);
  181. Reset_B20(); // GPIO_ResetBits(GPIOC, GPIO_Pin_12)
  183. delay_18b20(480);
  184. Set_B20();
  185. // delay_18b20(500);
  186. delay_18b20(480);
  188. count=0;
  189. aa=Read_B20(); //读取温度
  190. while(!aa && count<100) //温度不宜超过99°C
  191. {
  192. aa=Read_B20();
  193. count++;
  194. }
  195. if(count>=99)
  196. Error_Flag=1;
  197. else
  198. Error_Flag=0;
  200. }
  202. unsigned char Read18B20(void)//读数据
  203. {
  204. unsigned char i=0;
  205. unsigned char date=0;
  206. u8 tempp;
  207. for(i=8;i>0;i--)
  208. {
  210. Reset_B20(); // GPIO_ResetBits(GPIOC, GPIO_Pin_12)
  211. date>>=1; //右移一位
  212. delay_18b20(1);
  213. Set_B20(); //置1
  214. delay_18b20(1);
  215. tempp=Read_B20(); //读取温度
  217. if(tempp)
  218. 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
  219. delay_18b20(60);
  220. }
  221. return(date);
  222. }
  223. void Write18B20(unsigned char date)//写数据
  224. {
  225. unsigned char i=0;
  227. for (i=8; i>0; i--)
  228. {
  229. Reset_B20(); //置0
  230. delay_18b20(1);
  231. if(date & 0x01)
  232. {
  233. Set_B20();
  234. }
  235. else
  236. { Reset_B20();}
  237. delay_18b20(60);
  238. date>>=1; //数据右移一位
  239. Set_B20();
  240. delay_18b20(1);
  242. }
  243. delay_18b20(15);
  244. }
  246. float Read_T()//读温度
  247. {
  248. unsigned char TUp,TDown;
  249. unsigned char fTemp;
  250. u8 TT=0;
  252. float Temp = 0;
  253. Init18B20(); //18B20的初始化
  254. Write18B20(0xcc);//写指令：跳过ROM,仅一个DS18B20
  255. Write18B20(0x44);//启动温度转换
  256. Init18B20();
  257. Write18B20(0xcc);//写指令：跳过ROM,仅一个DS18B20
  258. Write18B20(0xbe);//读暂存寄存器
  259. TDown = Read18B20();//低字节
  260. TUp = Read18B20();//高字节
  262. if(TUp>0x7f)
  263. {
  264. TDown=~TDown;
  265. TUp=~TUp+1;
  266. TUp/=8;
  267. zf=1;
  268. }
  269. else
  270. zf=0;
  272. fTemp=TDown&0x0f;
  273. TUp<<=4;
  274. TDown>>=4;
  275. TT=TUp|TDown;
  276. Temp=TT+(float)fTemp/16;
  277. return(Temp);
  278. }
  280. int main(void)
  281. {
  283. /*!< At this stage the microcontroller clock setting is already configured,
  284. this is done through SystemInit() function which is called from startup
  285. file (startup_stm32f10x_xx.s) before to branch to application main.
  286. To reconfigure the default setting of SystemInit() function, refer to
  287. system_stm32f10x.c file
  288. */
  290. /* System Clocks Configuration */
  291. char ID[8];
  292. int i;
  293. RCC_Configuration();
  294. USART_int(115200);
  295. SysTick_Configuration();
  296. printf(" config done...\r\n");
  297. delay_ms(1000);
  299. Init18B20();
  300. Write18B20(0x33);
  301. delay_18b20(20);
  302. for(i=0;i<8;i++)
  303. {
  304. ID[i] = Read18B20();
  305. }
  307. while(1)
  308. {
  309. if(flag == 300)
  310. {
  311. printf("At the moment of ID is:");// 每300ms输出ID
  312. for(i=0;i<8;i++)
  313. {
  314. printf("%x",ID[i]);
  315. }
  316. printf("\r\n") ;
  317. }
  318. if(flag == 500)
  319. {
  320. printf("The Temperature is:%f\r\n",Read_T());//每500ms输出温度
  321. printf("===================================================\r\n");
  322. }
  323. }
  324. }
  328. #ifdef USE_FULL_ASSERT
  330. /**
  331. * @brief Reports the name of the source file and the source line number
  332. * where the assert_param error has occurred.
  333. * @param file: pointer to the source file name
  334. * @param line: assert_param error line source number
  335. * @retval None
  336. */
  337. void assert_failed(uint8_t* file, uint32_t line)
  338. {
  339. /* User can add his own implementation to report the file name and line number,
  340. ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
  342. /* Infinite loop */
  343. while (1)
  344. {
  345. }
  346. }
  348. #endif
  350. /**
  351. * @}
  352. */
  354. /**
  355. * @}
  356. */
  358. #ifdef __GNUC__
  359. /* With GCC/RAISONANCE, small printf (option LD Linker->Libraries->Small printf
  360. set to 'Yes') calls __io_putchar() */
  361. #define PUTCHAR_PROTOTYPE int __io_putchar(int ch)
  362. #else
  363. #define PUTCHAR_PROTOTYPE int fputc(int ch, FILE *f)
  364. #endif /* __GNUC__ */
  368. /**
  369. * @brief Retargets the C library printf function to the USART.
  370. * @param None
  371. * @retval None
  372. */
  373. PUTCHAR_PROTOTYPE
  374. {
  375. /* Place your implementation of fputc here */
  376. /* e.g. write a character to the USART */
  377. USART_SendData(EVAL_COM1, (uint8_t) ch);
  379. /* Loop until the end of transmission */
  380. while (USART_GetFlagStatus(EVAL_COM1, USART_FLAG_TC) == RESET)
  381. {}
  383. return ch;
  384. }
  386. #ifdef USE_FULL_ASSERT
  388. /**
  389. * @brief Reports the name of the source file and the source line number
  390. * where the assert_param error has occurred.
  391. * @param file: pointer to the source file name
  392. * @param line: assert_param error line source number
  393. * @retval None
  394. */
  395. void assert_failed(uint8_t* file, uint32_t line)
  396. {
  397. /* User can add his own implementation to report the file name and line number,
  398. ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
  400. /* Infinite loop */
  401. while (1)
  402. {
  403. }
  404. }
  406. #endif

 

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