时钟滴答代码
******************************************************************************
* @file EXTI/EXTI_Config/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.
*
*
© COPYRIGHT 2011 STMicroelectronics
******************************************************************************
*/
/* Includes ------------------------------------------------------------------*/
#include "stm32f10x.h"
#include "stm32_eval.h"
#include "delay.h"
#include
volatile int flag;
#define Set_B20() GPIO_SetBits(GPIOC, GPIO_Pin_12) //????PC12
#define Reset_B20() GPIO_ResetBits(GPIOC, GPIO_Pin_12) //????PC12
#define Read_B20() GPIO_ReadInputDataBit(GPIOC,GPIO_Pin_12) //?PC12??
unsigned char Error_Flag=0;
unsigned char zf=0;
void SysTick_Configuration(void)
{
/* Setup SysTick Timer for 10 msec interrupts */
if (SysTick_Config(48000)) //SysTick??
{
/* Capture error */
while (1);
}
/* Configure the SysTick handler priority */
NVIC_SetPriority(SysTick_IRQn, 0x0); //SysTick?????
}
/** @addtogroup STM32F10x_StdPeriph_Examples
* @{
*/
/** @addtogroup EXTI_Config
* @{
*/
/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
GPIO_InitTypeDef GPIO_InitStructure;
USART_InitTypeDef USART_InitStructure;
USART_ClockInitTypeDef USART_ClockInitStructure;
void RCC_Configuration(void)
{
RCC_DeInit(); //???RCC???????
RCC_HSICmd(ENABLE); //????????
while(RCC_GetFlagStatus(RCC_FLAG_HSIRDY) == RESET); //?SHI?????????
RCC_SYSCLKConfig(RCC_SYSCLKSource_HSI); //??????,??SHI???????
RCC_HSEConfig(RCC_HSE_OFF); //????????,HSE??OFF
RCC_LSEConfig(RCC_LSE_OFF); //????????,LSE??OFF
//******??PLL?????48MHZ*******//
RCC_PLLConfig(RCC_PLLSource_HSI_Div2,RCC_PLLMul_8); //RCC_PLLMul_x ???PLL????? 6*x MHz
//************************************//
RCC_PLLCmd(ENABLE); ////*******************??PLL
while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET); //PLL??
RCC_ADCCLKConfig(RCC_PCLK2_Div4); // ADC??=PCLK/2
RCC_PCLK2Config(RCC_HCLK_Div1); // APB2??=HCLK
RCC_PCLK1Config(RCC_HCLK_Div2); /// APB1??=HCLK/2
RCC_HCLKConfig(RCC_SYSCLK_Div1); // AHB??=????
RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK); // ??PLL?????
while(RCC_GetSYSCLKSource() != 0x08); //?PLL??????
// SystemInit();
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOD|RCC_APB2Periph_AFIO, ENABLE); //??APB2????/****GPIOD???????IO??***/
GPIO_PinRemapConfig(GPIO_Remap_SWJ_JTAGDisable,ENABLE);//disable JTAG SW_DP??
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??
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; ////??????
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP; ////????????,??????
GPIO_Init(GPIOD, &GPIO_InitStructure); //???GPIOD
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;//LED
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); //??TIM2??
}
void USART_int(long BaudRate)
{
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA|RCC_APB2Periph_USART1,ENABLE);//??GPIOA?USART1????
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;//??USART????? BaudRate = 9600 ?????9600
USART_InitStructure.USART_WordLength = USART_WordLength_8b;//??????????????8bit
USART_InitStructure.USART_StopBits = USART_StopBits_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;//???????
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;//?????????????SCLK??
USART_ClockInit(USART1, &USART_ClockInitStructure);
USART_Init(USART1, &USART_InitStructure);//USART1???
USART_Cmd(USART1, ENABLE);//??USART1????
USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);//??????
USART_Cmd(USART1, ENABLE);
}
void delay_18b20(u32 nus) //18b20?????????,??????
{
u16 i;
while(nus--)
for(i=12;i>0;i--);
}
void Init18B20(void) //18B20???
{
u8 aa=0;
u8 count =0;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC, ENABLE);//??PC??
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_OD;//????
GPIO_Init(GPIOC, &GPIO_InitStructure);
Set_B20() ; // GPIO_SetBits(GPIOC, GPIO_Pin_12)
delay_18b20(1);
Reset_B20();
delay_18b20(480);
Set_B20();
// delay_18b20(500);
delay_18b20(480);
count=0;
aa=Read_B20(); //????
/****???????????99?,??????*/
while(!aa && count<100)
{
aa=Read_B20();
count++; //????for()?while??
}
if(count>=99)
Error_Flag=1;
else
Error_Flag=0;
}
unsigned char Read18B20(void)//??????
{
unsigned char i=0;
unsigned char date=0;
u8 tempp;
for(i=8;i>0;i--)
{
Reset_B20(); //??PC12
date>>=1; //??????
delay_18b20(1);
Set_B20(); //??
delay_18b20(1);
tempp=Read_B20(); //????
if(tempp)
date|=0x80; // 1000 0000 ?????1 ,????,??????0?1,?8??????? 0xff = 1111 1111
delay_18b20(60);
}
return(date);
}
void Write18B20(unsigned char date)//???
{
unsigned char i=0;
for (i=8; i>0; i--)
{
Reset_B20();
delay_18b20(1);
if(date & 0x01)
{
Set_B20();
}
else
{ Reset_B20();}
delay_18b20(60);
date>>=1;
Set_B20();
delay_18b20(1);
}
delay_18b20(15);
}
float Read_T()//???
{
unsigned char TUp,TDown;
unsigned char fTemp;
u8 TT=0;
float Temp = 0;
Init18B20();
Write18B20(0xcc);
Write18B20(0x44);
Init18B20();
Write18B20(0xcc);
Write18B20(0xbe);
TDown = Read18B20();
TUp = Read18B20();
if(TUp>0x7f)
{
TDown=~TDown;
TUp=~TUp+1;
TUp/=8;
zf=1;
}
else
zf=0;
fTemp=TDown&0x0f;
TUp<<=4;
TDown>>=4;
TT=TUp|TDown;
Temp=TT+(float)fTemp/16;
return(Temp);
}
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 */
char ID[8];
int i;
RCC_Configuration();
USART_int(115200);
SysTick_Configuration();
printf(" config done...\r\n");
delay_ms(1000);
Init18B20(); //???
Write18B20(0x33); //?????????
delay_18b20(20);
for(i=0;i<8;i++) //?????for?? ????printf("event 1 oc......\r\n")??,??????
{
ID[i] = Read18B20();//????
}
while(1)
{
if(flag == 300)
{
printf("At the moment of ID is:") ;
for(i=0;i<8;i++) //????????,?????
{
printf("%u",ID[i]);//????
}
printf("\r\n") ;
}
if(flag == 500)
{
printf("The Temperature is:%f\r\n",Read_T());//???????
printf("===================================================\r\n");
}
}
}
#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
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