STM32F030读取温湿度传感器SHT20的C程序源码经实测实用过.docx(20210122140746)

1、/* file* brief* cpu* compiler* author* copyright* version* date* modifydateHTU20.xHTU20 function STM32F051Keil uVision V5.01HanneyV1.0.118-Sept-201520-Sept-2015 * attention*/ /STM32F051 模拟 IIC /#include boardAPI.h /#include stm32f0xx.h /#include HTU20.h /#include uart.h /#include delay.h #include st

2、m32f0xx.h #include stm32lib.h #define HTU20_CLK RCC_AHBPeriph_GPIOB#defineHTU20_SDA_PORT GPIOB#defineHTU20_SCL_PORT GPIOB#defineHTU20_SDA_PIN GPIO_Pin_11#defineHTU20_SCL_PIN GPIO_Pin_10#defineRESOLUTION_11b0x81/RH11 TH11#defineRESOLUTION_12b0x01/RH8 TH12#defineRESOLUTION_13b0x80/RH10 TH13#defineRESO

3、LUTION_14b0x00/RH12 TH14#defineOTP_disEN0x02/不能启动OPT加载#defineOTP_EN0x00/启动OPT加载#defineRESh16/ 湿度解析度#defineRESt16/ 温度解析度#defineMeasureDelay 12/ 解析延时时间 单位 msBYTE;WORD;typedefunsigned chartypedefunsigned intBYTEDelayms;GPIO_InitTypeDef GPIO_InitStructure;void delayms(BYTE ms);/* brief Start HTU GPIO po

4、rt CLK* retval None*/void HTUInit(void)RCC_AHBPeriphClockCmd(HTU20_CLK, ENABLE);/*=IIC address#define SHT20ADDR0x80=*/*=ACKandNACK defination=*/#define ACK0#define NACK1 /*=HTU20D Command Code=*/*CodeComment Hold master Hold master No Hold master No Hold masterCommandTrigger Temperature Measurement

5、0xe3Trigger Humidity Measurement 0xe5Trigger Temperature Measuremeng 0xf3Trigger Humidity Measurement0xf5Write user register0xe6Read user register0xe7Soft Reset 0xfe */#define SOFT_RESET 0xfe#define READ_REGISTER 0xe7#define WRITE_REGISTER 0xe6#define TRIGGER_TEMP 0xf3#define TRIGGER_HUMI 0xf5 /*=HT

6、U20 operate interface=*/#define HTU20_SCLGPIO_ReadInputDataBit(HTU20_SCL_PORT,HTU20_SCL_PIN)#define HTU20_SDAGPIO_ReadInputDataBit(HTU20_SDA_PORT,HTU20_SDA_PIN)* brief Set SDA pin dircate as output* retval None*/void HTU20_SDA_OUT()GPIO_StructInit(&GPIO_InitStructure);GPIO_InitStructure.GPIO_Pin = H

7、TU20_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);* brief Set SDA pin dircate as intput* retval

8、 None*/void HTU20_SDA_IN()GPIO_StructInit(&GPIO_InitStructure);GPIO_InitStructure.GPIO_Pin = HTU20_SDA_PIN;GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN;GPIO_InitStructure.GPIO_Speed = GPIO_Speed_Level_2;GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;GPIO_Init(HTU20_SDA_PORT, &GPIO_InitStructure);/*

9、briefSet SDA pin as high* retval None */void HTU20_SDA_1()GPIO_SetBits(HTU20_SDA_PORT,HTU20_SDA_PIN);* brief Set SDA pin as low* retval None*/void HTU20_SDA_0()GPIO_ResetBits(HTU20_SDA_PORT,HTU20_SDA_PIN); * brief Set SCL pin dircate as output* retval None*/void HTU20_SCL_OUT()GPIO_StructInit(&GPIO_

10、InitStructure);GPIO_InitStructure.GPIO_Pin = HTU20_SCL_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_SCL_PORT, &GPIO_InitStructure)

11、;* brief Set SCL pin as high* retval None*/void HTU20_SCL_1()GPIO_SetBits(HTU20_SCL_PORT,HTU20_SCL_PIN); * brief Set SCL pin as low* retval None*/void HTU20_SCL_0()GPIO_ResetBits(HTU20_SCL_PORT,HTU20_SCL_PIN);/*=Simulation I2C Function=*/* brief A short delay for iic synchronization* param t us* ret

12、val None*/ void I2CDelay (BYTE t) while(t -) _nop();_nop(); _nop(); _nop(); _nop();_nop();_nop(); _nop(); _nop(); _nop();_nop();_nop(); _nop(); _nop(); _nop();_nop();_nop(); _nop(); _nop(); _nop();_nop();_nop(); _nop(); _nop(); _nop();_nop();_nop(); _nop(); _nop(); _nop();_nop();_nop(); _nop(); _nop

13、(); _nop();* brief I2C init* retval None*/ void I2CInit(void)HTUInit();HTU20_SDA_OUT();HTU20_SCL_OUT();HTU20_SDA_1();I2CDelay(1);HTU20_SCL_1();I2CDelay(1);/* briefIIC start signal* comment SCL、SDA同为高，SDA跳变成低之后， SCL跳变成低* retval None*/void I2CStart(void)HTU20_SDA_OUT();HTU20_SDA_1();HTU20_SCL_1();I2CDelay(5);/ 大于 4.7usHTU20_SDA_0();I2CDelay(5);/ 大于 4usHTU20_SCL_0();I2CDelay(5);/* brief IIC Stop SignalSDA跳变成高* commet SCL、SDA同为低，SCL跳变成高之后,* retval None*/void I2CStop(void)HTU20_SDA_OUT();HTU20_SDA_0();HTU20_SCL_0();I2CDelay(5);HTU20_SCL_1();I2CD