STM32F030读取温湿度传感器SHT20的C程序源码经

****************************************************************************** * @file HTU20.x

* @brief HTU20 function * @cpu STM32F051

* @compiler KeiluVision V5.01 * @author Hanney * @copyright * @version V1.0.1 * @date 18-Sept-2015 * @modifydate20-Sept-2015

****************************************************************************** * @attention

*/

//STM32F051 模拟IIC //#include \//#include \//#include \//#include \//#include \

#include \#include \

#define HTU20_CLK RCC_AHBPeriph_GPIOB #define HTU20_SDA_PORT GPIOB #define HTU20_SCL_PORT GPIOB #define HTU20_SDA_PIN GPIO_Pin_11 #define HTU20_SCL_PIN GPIO_Pin_10 #define RESOLUTION_11b 0x81 //RH 11 TH 11 #define RESOLUTION_12b 0x01 //RH 8 TH 12 #define RESOLUTION_13b 0x80 //RH 10 TH 13 #define RESOLUTION_14b 0x00 //RH 12 TH 14 #define OTP_disEN 0x02 //不能启动OPT加载 #define OTP_EN 0x00 //启动OPT加载 #define RESh 16 //湿度解析度 #define RESt 16 //温度解析度

#define MeasureDelay 12 //解析延时时间单位ms typedef unsigned char BYTE; typedef unsigned int WORD; BYTE Delayms;

GPIO_InitTypeDef GPIO_InitStructure; voiddelayms(BYTE ms; /**

* @brief Start HTU GPIO port CLK * @retvalNone */

voidHTUInit(void {

RCC_AHBPeriphClockCmd(HTU20_CLK, ENABLE; }

/*================================================================

IIC address

================================================================*/ #define SHT20ADDR 0x80

/*================================================================ ACK and NACK defination

================================================================*/ #define ACK 0

#define NACK 1

/*================================================================

HTU20D Command Code

================================================================*/ /*

Command Code Comment Trigger Temperature Measurement 0xe3 Hold master Trigger Humidity Measurement 0xe5 Hold master Trigger Temperature Measuremeng 0xf3 No Hold master Trigger Humidity Measurement 0xf5 No Hold master Write user register 0xe6

Read user register 0xe7 Soft Reset 0xfe */

#define SOFT_RESET 0xfe #define READ_REGISTER 0xe7 #define WRITE_REGISTER 0xe6 #define TRIGGER_TEMP 0xf3 #define TRIGGER_HUMI 0xf5

/*================================================================

HTU20 operate interface

================================================================*/

#define HTU20_SCL

GPIO_ReadInputDataBit(HTU20_SCL_PORT,HTU20_SCL_PIN #define HTU20_SDA GPIO_ReadInputDataBit(HTU20_SDA_PORT,HTU20_SDA_PIN

/**

* @brief Set SDA pin dircate as output * @retvalNone */

void HTU20_SDA_OUT( {

GPIO_StructInit(&GPIO_InitStructure;

GPIO_InitStructure.GPIO_Pin = HTU20_SDA_PIN; GPIO_InitStructure.GPIO_Mode =GPIO_Mode_OUT; GPIO_InitStructure.GPIO_OType = GPIO_OType_OD; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_Level_2; GPIO_InitStructure.GPIO_PuPd =GPIO_PuPd_NOPULL; GPIO_Init(HTU20_SDA_PORT, &GPIO_InitStructure; } /**

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