EEPW论坛

这些小活动你都参加了吗？快来围观一下吧！>>

电子产品世界 » 论坛首页 » 高校专区 » 漓东e学堂 » 1010 【更新】labview的安装过程

共71条 6/8 |‹ ‹ 3 4 5 6 7 8 › 跳转至页

买西瓜送熙熙

菜鸟

2014-12-04 13:55:15 打赏

51楼

case i 的值只有0到4 为啥要用for自加到6捏？

评论

菜鸟

2014-12-04 19:42:10 打赏

52楼

应该是for（i=0；i<5;i++）才对，看了一下case5个数就脑抽写<6了

评论

菜鸟

2014-12-04 19:47:32 打赏

53楼

现在写的是用电阻变化的大小来控制PWM的变化

只是白色亮度大小的变化

延时的时候会出现颜色的变化

改进ing

#include "stm32f10x.h"
#include "stm32_eval.h"
#include 
#define VREF 3.3
int temp0,temp1,temp2;

/*延时函数 微秒*/  
void delay_us(u32 n)   
{   
    u8 j;   
    while(n--)   
    for(j=0;j<10;j++);   
}   
/*延时函数 毫秒*/  
void  delay_ms(u32 n)   
{   
   while(n--)   
    delay_us(1000);   
} 

GPIO_InitTypeDef   GPIO_InitStructure;
USART_InitTypeDef USART_InitStructure;
USART_ClockInitTypeDef USART_ClockInitStructure;

void RCC_Configuration(void)
{
	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);

	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);
}

void GPIO_INIT()   
{  
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC, ENABLE);  //RCC_APB2Periph_GPIOB  开启GPIOB的时钟      ENABLE\DISABLE   打开or关闭 	
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8|GPIO_Pin_9|GPIO_Pin_10;//按键使用PC8-10 
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;         //速度：配置晶振
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;          //模式：Out_PP推挽输出,可做输出，输入 ！！！  	
GPIO_Init(GPIOC, &GPIO_InitStructure);	
} 

void ADC_CONFIG(){
	ADC_InitTypeDef ADC_InitStructure;
	#if defined (STM32F10X_LD_VL) || defined (STM32F10X_MD_VL) || defined (STM32F10X_HD_VL)
  /* ADCCLK = PCLK2/2 */
  RCC_ADCCLKConfig(RCC_PCLK2_Div2); 
#else
  /* ADCCLK = PCLK2/4 */
  RCC_ADCCLKConfig(RCC_PCLK2_Div4); 
#endif
ADC_DeInit(ADC1);
  /* Enable ADC1 and GPIOC clock */
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1 | RCC_APB2Periph_GPIOB, ENABLE);
	
	/* Configure PB0 (ADC Channel14) as analog input -------------------------*/
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;
  GPIO_Init(GPIOB, &GPIO_InitStructure);
	  
  /* ADC1 configuration ------------------------------------------------------*/
  ADC_InitStructure.ADC_Mode = ADC_Mode_Independent;
  ADC_InitStructure.ADC_ScanConvMode = ENABLE;
  ADC_InitStructure.ADC_ContinuousConvMode = ENABLE;
  ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_None;
  ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
  ADC_InitStructure.ADC_NbrOfChannel = 1;
  ADC_Init(ADC1, &ADC_InitStructure);

  /* Enable ADC1 DMA */
  ADC_DMACmd(ADC1, ENABLE);
  
  /* Enable ADC1 */
  ADC_Cmd(ADC1, ENABLE);

}

int Get_ADC(){
	 /* ADC1 regular channel configuration */ 
  ADC_RegularChannelConfig(ADC1, ADC_Channel_8, 1, ADC_SampleTime_55Cycles5);
	/* Enable ADC1 reset calibration register */   
  ADC_ResetCalibration(ADC1);
  /* Check the end of ADC1 reset calibration register */
  while(ADC_GetResetCalibrationStatus(ADC1));

  /* Start ADC1 calibration */
  ADC_StartCalibration(ADC1);
  /* Check the end of ADC1 calibration */
  while(ADC_GetCalibrationStatus(ADC1));
     
  /* Start ADC1 Software Conversion */ 
  ADC_SoftwareStartConvCmd(ADC1, ENABLE);
	
	return ADC_GetConversionValue(ADC1);
}

void PWM_Config()
{uint16_t PrescalerValue = 0;
	TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;//定义结构体
  TIM_OCInitTypeDef  TIM_OCInitStructure;

  RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);//打开TIM2，TIM2挂在AP1上
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO , ENABLE);//一、开启功能复用
	
	GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1|GPIO_Pin_2|GPIO_Pin_3;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;//所需的3个管脚，复用输出
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_Init(GPIOA, &GPIO_InitStructure);
//	GPIO_SetBits(GPIOA,GPIO_Pin_1|GPIO_Pin_2|GPIO_Pin_3);   
//  delay_ms(20);	
	TIM_Cmd(TIM2, ENABLE);

  PrescalerValue = (uint16_t) (SystemCoreClock / 24000000) - 1;//二、配置TIM2
  /* Time base configuration */
  TIM_TimeBaseStructure.TIM_Period = 0x0FFE;
  TIM_TimeBaseStructure.TIM_Prescaler = PrescalerValue;
  TIM_TimeBaseStructure.TIM_ClockDivision = 0;
  TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
  TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure);
	
  TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;//三、脉冲宽度调制模式1
  TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
	
  /* PWM1 Mode configuration: Channel2 *///四、
  TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;//选择输出比较状态	
  TIM_OCInitStructure.TIM_Pulse = 0xFFFF;//IM_Pulse-设置了待装入捕获比较寄存器的脉冲值，取值在0x0000-0xFFFF之间	                                        
  TIM_OC2Init(TIM2, &TIM_OCInitStructure);
	
	/* PWM1 Mode configuration: Channel3 */
  TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
  TIM_OCInitStructure.TIM_Pulse = 0xFFFF;//0x0000最亮，0xFFFF熄灭
  TIM_OC3Init(TIM2, &TIM_OCInitStructure);
	
	/* PWM1 Mode configuration: Channel4 */
  TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
  TIM_OCInitStructure.TIM_Pulse = 0xFFFF;
  TIM_OC4Init(TIM2, &TIM_OCInitStructure);
  TIM_ARRPreloadConfig(TIM2, ENABLE);//reload-重新装载初始值
}

//void RGB(int a)
//{
////	int VCC;
////	VCC=a;
//	//temp1-Red,temp2-Green,temp0-Blue
//			if(!GPIO_ReadInputDataBit(GPIOC,GPIO_Pin_9))   //判断按键是否被按下 
//	{   
//			delay_ms(50);            //延时去抖
//			if(!GPIO_ReadInputDataBit(GPIOC,GPIO_Pin_9))   //判断按键是否被按下 假如端口PC8为低电平
//			{ 
//					printf(" !!!!!!!!!!!!!!!!!!!!!\r\n");
//			//GPIO_ResetBits(GPIOA,GPIO_Pin_1|GPIO_Pin_2|GPIO_Pin_3);
//			TIM_SetCompare2(TIM2,a);delay_ms(100); //设置TIM2捕获比较器2寄存器的值
//			TIM_SetCompare3(TIM2,a);delay_ms(100);//TIM——通道数（定时器，数值）	 
//			TIM_SetCompare4(TIM2,a);delay_ms(100); 
//			}
//	}
//}

int main(void)
{
	float Volt=0.00;
	int ADValue = 0;

  RCC_Configuration();
  USART_int(115200);//设置波特率
	GPIO_INIT();	
	ADC_CONFIG();
	printf(" config done...\r\n");
	Get_ADC();
	delay_ms(1000);
	PWM_Config();
	delay_ms(1000);
	
	while(1)
	{
		ADValue = Get_ADC();
//		RGB(ADValue);
		Volt = VREF*ADValue/4095;//实际电压
		printf("===============================\r\n");
		printf("The ADC value is:%d\r\n",ADValue);
		printf("The Volt is:%f V\r\n",Volt);
	  delay_ms(500);
//			if(!GPIO_ReadInputDataBit(GPIOC,GPIO_Pin_9))   //判断按键是否被按下 
//	{   
//			delay_ms(50);            //延时去抖
//			if(!GPIO_ReadInputDataBit(GPIOC,GPIO_Pin_9))   //判断按键是否被按下 假如端口PC8为低电平
//			{ 
			TIM_SetCompare2(TIM2,ADValue);delay_ms(100); //设置TIM2捕获比较器2寄存器的值
			TIM_SetCompare3(TIM2,ADValue);delay_ms(100);//TIM——通道数（定时器，数值）	 
			TIM_SetCompare4(TIM2,ADValue);delay_ms(100); 
//			}
//	}
}
}

#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

评论

买西瓜送熙熙

菜鸟

2014-12-04 19:52:21 打赏

54楼

不~ 应该4就够了哦~ for( i=0;i<4;i++) 这样就能加到4了

之前你遇到的那个警告会不会跟这个有关？

评论

菜鸟

2014-12-04 19:56:09 打赏

55楼

case：0-4

for（i<5）不就是0-4么

如果是 for（i<4）不就是0-3么

评论

买西瓜送熙熙

菜鸟

2014-12-04 20:06:19 打赏

56楼

哦，对的！你说的没错，我糊涂了

评论

高工

2014-12-08 20:55:24 打赏

57楼

不错哟

不过相关参数的取值，还是建议仔细看看数据手册和函数库

评论

菜鸟

2014-12-24 09:44:32 打赏

58楼

IIC记上电次数~

#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;  
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;//??????  
  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);  
}  
  
void IIc2_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;  
        I2C_InitStructure.I2C_OwnAddress1 = 0xA0;  
        I2C_InitStructure.I2C_Ack = I2C_Ack_Enable;  
        I2C_InitStructure.I2C_AcknowledgedAddress = I2C_AcknowledgedAddress_7bit;  
        I2C_InitStructure.I2C_ClockSpeed = 400000;         
        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));  
        I2C_GenerateSTART(I2C2,ENABLE);  
        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_SendData(I2C2, write_address);  
        while(!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_BYTE_TRANSMITTED));  
        I2C_SendData(I2C2, byte);  
        while(!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_BYTE_TRANSMITTED));  
        I2C_GenerateSTOP(I2C2, ENABLE);  
        do  
        {                  
           /* Send START condition */  
           I2C_GenerateSTART(I2C2, ENABLE);  
          /* Read I2C2 SR1 register */  
            /* Send EEPROM address for write */  
            I2C_Send7bitAddress(I2C2, 0xA0, I2C_Direction_Transmitter);  
        }while(!(I2C_ReadRegister(I2C2, I2C_Register_SR1) & 0x0002));  
  
        /* Clear AF flag */  
        I2C_ClearFlag(I2C2, I2C_FLAG_AF);  
        /* STOP condition */      
        I2C_GenerateSTOP(I2C2, ENABLE);    
}  
  
unsigned char I2C2_ReadByte(unsigned char  id, unsigned char read_address)  
{    
     unsigned char temp;           
     while(I2C_GetFlagStatus(I2C2, I2C_FLAG_BUSY)){}  
     I2C_GenerateSTART(I2C2, ENABLE);  
     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);  
     while(!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_RECEIVER_MODE_SELECTED));  
    I2C_AcknowledgeConfig(I2C2, DISABLE);  
    I2C_GenerateSTOP(I2C2, ENABLE);  
    while(!(I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_BYTE_RECEIVED)));  
    temp = I2C_ReceiveData(I2C2);  
    I2C_AcknowledgeConfig(I2C2, ENABLE);  
     return temp;  
}  
  
int main(void)  
{  
  RCC_Configuration();  
  EXTIkeyS1_Config();  
  USART_int(115200);  
  IIc2_Init();  
    printf(" config done...\r\n");  
    i = I2C2_ReadByte(0xA0,0);//向0x00读取数据  
    printf("从地址0x00读出数据 :%d\r\n",i);  
    i++;  
    I2C2_WriteByte(0xA0,0,i);//向0x00写入数据  
    printf("向地址0x00写入数据 :%d\r\n",i);  
    while(1)  
    {  
     delay_ms(2000);  
     printf(" 上电次数为%d\r\n",i);  
    }  
}  
void EXTIkeyS1_Config(void)//S1 PC8  
{  
  /* Enable GPIOA clock */  
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC, ENABLE);  
  /* Configure PA.00 pin as input floating */  
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8;//PC8 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(" 上电次数为%d\r\n",i);  
    /* Clear the  EXTI line 8 pending bit */  
    EXTI_ClearITPendingBit(EXTI_Line8);  
  }  
}  
  
#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

评论

菜鸟

2014-12-24 09:44:47 打赏

59楼

isp

#include "stm32f10x.h"
#include "stm32_eval.h"
#include <stdio.h>
#include "spi_flash.h"
//#define VREF 3.3

/*延时函数 微秒*/  
void delay_us(u32 n)   
{   
    u8 j;   
    while(n--)   
    for(j=0;j<10;j++);   
}   
/*延时函数 毫秒*/  

void  delay_ms(u32 n)   
{   
   while(n--)   
    delay_us(1000);   
} 

#define TxBufferSize1   (countof(TxBuffer1) - 1)
#define RxBufferSize1   (countof(TxBuffer1) - 1)
#define countof(a)      (sizeof(a) / sizeof(*(a)))
#define  BufferSize (countof(Tx_Buffer)-1)
typedef enum { FAILED = 0, PASSED = !FAILED} TestStatus;
#define  FLASH_WriteAddress     0x00000
#define  FLASH_ReadAddress      FLASH_WriteAddress
#define  FLASH_SectorToErase    FLASH_WriteAddress
#define  sFLASH_ID              0xEF3015     //W25X16的地址，不可以改的

#define buff_size  16;     
char rx_buff[],rx_buff_count=0;

uint8_t Tx_Buffer[] = "欢迎使用STM32掌上实验室\r\n                www.zsxy.gxnu.edu.cn";
uint8_t Rx_Buffer[BufferSize];

__IO uint32_t DeviceID = 0;
__IO uint32_t FlashID = 0;
__IO TestStatus TransferStatus1 = FAILED;

void Delay(__IO uint32_t nCount);
TestStatus Buffercmp(uint8_t* pBuffer1, uint8_t* pBuffer2, uint16_t BufferLength);

GPIO_InitTypeDef   GPIO_InitStructure;
USART_InitTypeDef USART_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
  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);

		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);
}

TestStatus Buffercmp(uint8_t* pBuffer1, uint8_t* pBuffer2, uint16_t BufferLength)//比较两个是否相等
{
  while(BufferLength--)
  {
    if(*pBuffer1 != *pBuffer2)
    {
      return FAILED;//如若有不相等，则返回FAILED
    }
    pBuffer1++;
    pBuffer2++;
  }
  return PASSED;//如若全部相等，则返回PASSED
}

void Delay(__IO uint32_t nCount)
{
  for(; nCount != 0; nCount--);
}


void SPI_TEST()//这节课学习的部分
{
	printf("\r\n这是一个2M SPI总线flash(W25X16)测试 \r\n");
	                         /*第一步：在对芯片操作前先要对端口及SPI外设进行相应的初始化*/
	SPI_FLASH_Init();  //SPI初始化,在spi_flash.c头文件中定义
	
	/* Get SPI Flash Device ID */
	DeviceID = SPI_FLASH_ReadDeviceID();//第二步：读取器件地址1，此函数在spi_flash.c头文件中定义
	Delay( 200 );
	
	/* Get SPI Flash ID */
	FlashID = SPI_FLASH_ReadID();//第三步：读取器件地址2，此函数在spi_flash.c头文件中定义
	printf("\r\n FlashID is 0x%X,  Manufacturer Device ID is 0x%X\r\n", FlashID, DeviceID);
	
	/* Check the SPI Flash ID */ 
	/* #define  sFLASH_ID  0xEF3015 W25X16的固定ID地址 */
	                                  //第四步：检测ID地址是否相同
	if (FlashID == sFLASH_ID)//如果ID地址相同
	{
		printf("\r\n 检测到华邦flash W25X16 !\r\n");
		/* Erase SPI FLASH Sector to write on */
		SPI_FLASH_SectorErase(FLASH_SectorToErase);	 	 
		
		/*写缓存并发送*/
		SPI_FLASH_BufferWrite(Tx_Buffer, FLASH_WriteAddress, BufferSize);
		printf("\r\n写入的数据是:%s \r\t", Tx_Buffer);
		
		/* 读出刚才写入的数据*/
		SPI_FLASH_BufferRead(Rx_Buffer, FLASH_ReadAddress, BufferSize);
		printf("\r\n读出的数据是:%s \r\n", Rx_Buffer);
		
		                                /* 第五步：比较写入的数据与读出的数据是否相等*/
		TransferStatus1 = Buffercmp(Tx_Buffer, Rx_Buffer, BufferSize);//前面写的用于比较的函数
		
		if( PASSED == TransferStatus1 )//如若读写一致，则测试成功
		{    
			printf("\r\n 2M SPI总线flash(W25X16)测试成功!\n\r");
		}
		else////如若读写不一致，则测试不成功
		{        
			printf("\r\n 2M SPI总线flash(W25X16)测试失败!\n\r");
		}
	}
	
	else//如果ID地址不相同
	{    
		printf("\r\n 未检测到 W25X16 ID!\n\r");
	}
	
	SPI_Flash_PowerDown();  //进入掉电模式
	printf("\r\n=================================================\n\r");
}

int main(void)
{
  RCC_Configuration();
  USART_int(115200);
	
	printf(" config done...\r\n");
	delay_ms(1000);
	while(1)
	{
    	SPI_TEST();
		  delay_ms(2000);
	}
}

#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

评论

菜鸟

2014-12-24 09:55:28 打赏

60楼

昨天写完之后出来的ID号都是乱码郁闷半天

时序图什么的看不大懂

请教了各方大神

结果今早@买西瓜送熙熙告诉我是输出格式有问题

尽管是unsigned char ID1[8];定义的数组

打印时用%c或%s都会出现乱码

最后还是%u正常

这个程序实现作业要求：

用配置时钟滴答48MHz;

300us显示一次18b20 ID，500us显示一次温度

#include "stm32f10x.h"
#include "stm32_eval.h"
#include <stdio.h>
volatile int flag;
                                                      //板子已将PC12脚接到18B20
#define Set_B20()	 GPIO_SetBits(GPIOC, GPIO_Pin_12)    //关上PC12
#define Reset_B20()	 GPIO_ResetBits(GPIOC, GPIO_Pin_12)   //打开PC12
#define Read_B20()	 GPIO_ReadInputDataBit(GPIOC,GPIO_Pin_12)   //读PC12
unsigned char Error_Flag=0;
unsigned char zf=0;  

/*延时函数 微秒*/  
void delay_us(u32 n)   
{   
    u8 j;   
    while(n--)   
    for(j=0;j<10;j++);   
}   
/*延时函数 毫秒*/  
void  delay_ms(u32 n)   
{   
   while(n--)   
    delay_us(1000);   
}

void SysTick_Configuration(void)
{
	/*==========此次作业的部分===========*/
  if (SysTick_Config(48000))                //SysTick配置。48000/48ms=1ms
	/*===================================*/
  { 
    while (1);
  }  
  NVIC_SetPriority(SysTick_IRQn, 0x0);                       //SysTick中断优先级
}

GPIO_InitTypeDef   GPIO_InitStructure;
USART_InitTypeDef USART_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);
	/*==========此次作业的部分===========*/
  RCC_PLLConfig(RCC_PLLSource_HSI_Div2,RCC_PLLMul_6);     //  PLLMul_X就是X的倍数，即8*6=48HMz
	/*===================================*/
  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);

		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);
}

void delay_18b20(u32 nus)  //18B20时序要求严格精确，为18B20写的延时函数
{
	u16 i;                               //这个函数写的貌似是1us
	while(nus--)             //nus每减一次，i减12次
		for(i=12;i>0;i--);
}

void Init18B20(void)
{
   u8 aa=0;
   u8 count =0;
	 RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC, ENABLE);  //打开PC时钟
   GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12;         //选中管脚12
   GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_OD;   //开漏输出
   GPIO_Init(GPIOC, &GPIO_InitStructure);
   Set_B20() ;         //拉高
   delay_18b20(1);
	
	 //一、复位：至少480us的低电平信号，当18b20接收到此信号后会回发芯片一个存在脉冲
   Reset_B20();        //拉低
   delay_18b20(480);
	
	 //二、存在脉冲：将数据单总线拉高，接收存在脉冲，通信双方达成基本协议，双方开始数据通信
   Set_B20();     //拉高
   delay_18b20(480);

	count=0;
	aa=Read_B20();   //aa为读得的温度、
	
/*=====我觉得下面这几句用来统计18B20出现错误的次数，次数到99次的时候报错======*/
    while(!aa && count<100)	 //如果温度值和count数都大于100时
   {
   	aa=Read_B20();           //再次读温度值
	  count++;                 //发生错误了，数值+1
   }
	 
   if(count>=99)             //如果发生错误的次数大于99次，那么报错，标志位为1
   		Error_Flag=1;
	 else
		  Error_Flag=0;          //报错次数未达到99次，正常工作  
}
                             //读一个字节
unsigned char Read18B20(void)//读18b20里的数据，由于是单数据总线，需要一位一位地读
{  
unsigned char i=0;
unsigned char date=0;
u8 tempp;
   for(i=8;i>0;i--)//循环8次
   {

   Reset_B20();   //拉低读数
   date>>=1;      //右移一位
   delay_18b20(1);
   Set_B20();      //拉高
   delay_18b20(1);
   tempp=Read_B20();  // tempp为读得的温度
   if(tempp)
   		date|=0x80;    
	    delay_18b20(60);
	}
	return(date);
}

void Write18B20(unsigned char date)   //写一个字节
{
	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); 	 // 跳过读取序列号
	Write18B20(0x44); 	//
	Init18B20();
	Write18B20(0xcc); 	//
	Write18B20(0xbe); 	//	
	TDown = Read18B20();   	//低8位
	TUp = Read18B20();   	//高8位	
	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)
{
	int i;
	unsigned char ID1[8];     //定义一个用于18b20id读取和存放的数组
  RCC_Configuration();
  USART_int(115200);
	SysTick_Configuration();
	
/*==========此次作业的部分===========*/
  Init18B20 ();        //初始化DS18B20
	Write18B20(0x33);     //写入“读取序列号”命令 
  delay_18b20 (15);	
	  for(i=0;i<8;i++)
  {
		ID1[i]=Read18B20();   //读取18b20发回的64位地址
  }
/*===================================*/
	
	printf(" config done...\r\n");
	delay_ms(1000);
	
	while(1)
	{
	/*==========此次作业的部分===========*/
		if(flag == 300){         //300us读一次id
			  printf("The id is:");
				for(i=0;i<8;i++)        
	      {		
	     		printf("%u",ID1[i]);	
					if(i==7){printf("\r\n");	}
        } 
      }
	/*===================================*/
			
		if(flag == 500){         //500us读一次温度
			printf("The Temperature is:%f\r\n",Read_T());
      }
	}
}

#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);

  /* Loop until the end of transmission */
  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

评论

共71条 6/8 |‹ ‹ 3 4 5 6 7 8 › 跳转至页

回复

有奖活动
2024中国国际社会公共安全产品博览会\|中国安博会
5月直播——【探索边缘智能的未来——直播盛宴即将开启！】
请大声喊出：我要开发板！
【有奖活动】EEPW网站征稿正在进行时，欢迎踊跃投稿啦
【有奖活动】智能可穿戴设备AR/VR如何引领科技新潮流！

打赏帖
【换取手持数字示波器】+51单片机使用ADS1115实现ADC转换被打赏45分
【换取手持数字示波器】使用MCXN947 I3C接口读取P3T1755DP传感器数据被打赏47分
【换取手持数字示波器】+FPGAVerilog状态机不同写法知识分享被打赏37分
【换取手持数字示波器】+FPGAVerilog态机的基本概念知识分享被打赏35分
【换取手持数字示波器】+FPGA基本语法语句if…else与case语句分析分享被打赏30分
【换取手持数字示波器】+FPGA基本语法语句Verilog代码优化之for语句分享被打赏37分
【换取手持数字示波器】关于STM32F030ADC采集的巨坑，请注意避让！！！被打赏45分
【换取手持数字示波器】使用树莓派PICO驱动BMI160被打赏45分
【换取手持数字示波器】+测试四通道16位ADC转换器ADS1115被打赏45分
【换取手持数字示波器】使用neopixel库点亮WS2812B被打赏50分

热门分类
STM32	MCU
通讯及无线技术	物联网技术
电子DIY	板卡试用
基础知识	软件与操作系统
我爱生活	小e食堂