sht10代码.docx

1、sht10代码xukai871105 xukai871105 当前离线 积分1101 2楼 楼主| 发表于 2011-11-17 17:02:52 | 只看该作者 /* Includes -*/#include stm32f10x.h#include usart1.h#include stdio.h/* Private typedef -*/* Private define -*/#define SDA_H() GPIO_SetBits(GPIOB,GPIO_Pin_0)#define SDA_L() GPIO_ResetBits(GPIOB,GPIO_Pin_0)#define SCK_H(

2、) GPIO_SetBits(GPIOB,GPIO_Pin_1)#define SCK_L() GPIO_ResetBits(GPIOB,GPIO_Pin_1)/读SDA数据#define SDA_R() GPIO_ReadInputDataBit(GPIOB,GPIO_Pin_0)/* Private macro -*/#define noACK 0 /无应答#define ACK 1 /应答#define STATUS_REG_W 0x06 /000 0011 0#define STATUS_REG_R 0x07 /000 0011 1#define MEASURE_TEMP 0x03 /

3、000 0001 1#define MEASURE_HUMI 0x05 /000 0010 1#define RESET 0x1e /000 1111 0/* Private variables -*/enum TEMP,HUMI;uint8_t Test_Timetick = 0;uint16_t Test_Counter = 0;/* Private function prototypes -*/void RCC_Config(void);void USART1_Config(void);void SHT10_Config(void);void SHT10_SDAIn(void);void

4、 SHT10_SDAOut(void);void SHT10_Delay(void);uint8_t SHT10_WriteByte(uint8_t value);uint8_t SHT10_ReadByte(uint8_t Ack);void SHT10_Start(void);void SHT10_ConReset(void);uint8_t SHT10_Measure(uint16_t* pValue, uint8_t* pCheckSum, uint8_t mode);void SHT10_Cal(uint16_t Temp,uint16_t Hum, float* pTempValu

5、e,float* pHumValue);/* Private functions -*/* * brief 主程序 * param 无 * retval 无 */int main(void) /温度结果 16bit uint16_t TempValue; /湿度结果 16bit uint16_t HumValue; /温度转换结果 float TempResult; /湿度转换结果 float HumResult; /校验值 uint8_t CheckValue = 0x00; /错误 uint8_t error = 0x00; /初始化RCC RCC_Config(); USART1_Con

6、fig(); SHT10_Config(); printf(Startn); while(1) if(Test_Timetick) Test_Timetick = 0; Test_Counter +; /延时2000ms if(Test_Counter 2000) Test_Counter = 0; printf(启动转换!n); /SHT10 连接 SHT10_ConReset(); /获得温度和湿度数据，16位格式 error += SHT10_Measure(&TempValue,&CheckValue,TEMP); error += SHT10_Measure(&HumValue,&C

7、heckValue,HUMI); /温度湿度计算，浮点数形式 SHT10_Cal(TempValue ,HumValue,&TempResult,&HumResult); /通过串口输出，温度和湿度数据 printf(温度 %2.1fC 湿度 %2.1f%n,TempResult,HumResult); /* * brief 初始化Systick定时器 * param None * retval None */void RCC_Config(void) /Systick时钟每1ms触发一次 if (SysTick_Config(SystemCoreClock / 1000) / while (

8、1); /* * brief 初始化SHT10 IO口 * param None * retval None */void SHT10_Config(void) GPIO_InitTypeDef GPIO_InitStructure; /使能GPIOA时钟 RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB ,ENABLE); /PB0 SDA 推挽输出 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_InitSt

9、ructure.GPIO_Mode = GPIO_Mode_Out_PP; GPIO_Init(GPIOB, &GPIO_InitStructure); /PB1 SCK 推挽输出 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP; GPIO_Init(GPIOB, &GPIO_InitStructure);/* * brief 配置为输入状态 * param Non

10、e * retval None */void SHT10_SDAIn(void) GPIO_InitTypeDef GPIO_InitStructure; /PB0 SDA 浮动输入，外部有上拉电阻 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING; GPIO_Init(GPIOB, &GPIO_InitStructure); /* * brief 配置为输

11、出状态 * param None * retval None */void SHT10_SDAOut(void) GPIO_InitTypeDef GPIO_InitStructure; /PB0 SDA 推挽输出 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP; GPIO_Init(GPIOB, &GPIO_InitStructure);/* * brief 配置

12、为输出状态 * param 写数据 * retval 应答 */uint8_t SHT10_WriteByte(uint8_t value) uint8_t i,error=0; /SDA输出 SHT10_SDAOut(); for( i = 0x80 ; i0 ; i/=2) if ( i & value) SDA_H(); else SDA_L(); SHT10_Delay(); SCK_H(); SHT10_Delay(); SCK_L(); SHT10_Delay(); /SDA输入 SHT10_SDAIn(); SCK_H(); error = SDA_R(); /读应答位 SCK_

13、L(); return error; /* * brief 读数据 * param 应答 * retval 返回数据 */uint8_t SHT10_ReadByte(uint8_t Ack) uint8_t i,val=0; /输入状态 SHT10_SDAIn(); for (i=0x80;i0;i/=2) SHT10_Delay(); SCK_H(); SHT10_Delay(); if (SDA_R() val=(val | i); /读数据 SCK_L(); /输出状态 SHT10_SDAOut(); if(Ack) SDA_L(); /应答为低电平 else SDA_H(); SHT10_Delay(); SCK_H(); SHT10_Delay(); SCK_L(); SHT10_Delay();