//=============================================================================
//????S?E?N?S?I?R?I?O?N???AG??Laubisruetistr.?50?CH-8712?Staefa?Switzerland
//=============================================================================
//?Project???:??SHT3x?Sample?Code?（V1.1）
//?File??????:??i2c_hal.c?（V1.1）
//?Author????:??RFU
//?Date??????:??6-Mai-2015
//?Controller:??STM32F100RB
//?IDE???????:??礦ision?V5.12.0.0
//?Compiler??:??Armcc
//?Brief?????:??I2C?hardware?abstraction?layer
//=============================================================================

//--?Includes?-----------------------------------------------------------------
#include?“i2c_hal.h“

//--?Defines?------------------------------------------------------------------
//?I2C?IO-Pins????????????????????????/*?--?adapt?the?defines?for?your?uC?--?*/

//?SDA?on?port?B?bit?7
#define?SDA_LOW（）??（GPIOB->BSRR?=?0x00800000）?//?set?SDA?to?low
#define?SDA_OPEN（）?（GPIOB->BSRR?=?0x00000080）?//?set?SDA?to?open-drain
#define?SDA_READ???（GPIOB->IDR??&?0x0080）?????//?read?SDA

//?SCL?on?port?B?bit?6??????????????/*?--?adapt?the?defines?for?your?uC?--?*/
#define?SCL_LOW（）??（GPIOB->BSRR?=?0x00400000）?//?set?SCL?to?low
#define?SCL_OPEN（）?（GPIOB->BSRR?=?0x00000040）?//?set?SCL?to?open-drain
#define?SCL_READ???（GPIOB->IDR??&?0x0040）?????//?read?SCL

//--?Static?function?prototypes?-----------------------------------------------
static?etError?I2c_WaitWhileClockStreching（u8t?timeout）;

//-----------------------------------------------------------------------------
void?I2c_Init（void）??????????????????????/*?--?adapt?the?init?for?your?uC?--?*/
{
??RCC->APB2ENR?|=?0x00000008;??//?I/O?port?B?clock?enabled
??
??SDA_OPEN（）;??????????????????//?I2C-bus?idle?mode?SDA?released
??SCL_OPEN（）;??????????????????//?I2C-bus?idle?mode?SCL?released
??
??//?SDA?on?port?B?bit?14
??//?SCL?on?port?B?bit?13
	GPIOB->CRL&=0X00FFFFFF;	//PB6/7?推挽輸出
	GPIOB->CRL|=0X55000000;	???
}

//-----------------------------------------------------------------------------
void?I2c_StartCondition（void）
{
??SDA_OPEN（）;
??DelayMicroSeconds（1）;
??SCL_OPEN（）;
??DelayMicroSeconds（1）;
??SDA_LOW（）;
??DelayMicroSeconds（10）;??//?hold?time?start?condition?（t_HD;STA）
??SCL_LOW（）;
??DelayMicroSeconds（10）;
}

//-----------------------------------------------------------------------------
void?I2c_StopCondition（void）
{
??SCL_LOW（）;
??DelayMicroSeconds（1）;
??SDA_LOW（）;
??DelayMicroSeconds（1）;
??SCL_OPEN（）;
??DelayMicroSeconds（10）;??//?set-up?time?stop?condition?（t_SU;STO）
??SDA_OPEN（）;
??DelayMicroSeconds（10）;
}

//-----------------------------------------------------------------------------
etError?I2c_WriteByte（u8t?txByte）
{
??etError?error?=?NO_ERROR;
??u8t?????mask;
??for（mask?=?0x80;?mask?>?0;?mask?>>=?1）//?shift?bit?for?masking?（8?times）
??{
????if（（mask?&?txByte）?==?0）?SDA_LOW（）;?//?masking?txByte?write?bit?to?SDA-Line
????else?????????????????????SDA_OPEN（）;

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----

?????文件???????2047??2017-11-23?15:41??Sensirion_Humidity_Sensors_SHT3x_Sample_Code\DebugConfig\STM32-Discovery_STM32F100RB_1.0.0.dbgconf

?????文件????????339??2019-02-20?11:47??Sensirion_Humidity_Sensors_SHT3x_Sample_Code\EventRecorderStub.scvd

?????文件?????241595??2019-02-19?15:19??Sensirion_Humidity_Sensors_SHT3x_Sample_Code\i2c_hal.crf

?????文件????????650??2019-02-19?15:19??Sensirion_Humidity_Sensors_SHT3x_Sample_Code\i2c_hal.d

?????文件?????259232??2019-02-19?15:19??Sensirion_Humidity_Sensors_SHT3x_Sample_Code\i2c_hal.o

?????文件?????245349??2019-02-20?11:51??Sensirion_Humidity_Sensors_SHT3x_Sample_Code\JlinkLog.txt

?????文件????????755??2019-02-19?17:10??Sensirion_Humidity_Sensors_SHT3x_Sample_Code\JlinkSettings.ini

?????文件?????245993??2019-02-20?11:46??Sensirion_Humidity_Sensors_SHT3x_Sample_Code\main.crf

?????文件????????640??2019-02-20?11:46??Sensirion_Humidity_Sensors_SHT3x_Sample_Code\main.d

?????文件?????261212??2019-02-20?11:46??Sensirion_Humidity_Sensors_SHT3x_Sample_Code\main.o

?????文件????????241??2015-05-07?22:24??Sensirion_Humidity_Sensors_SHT3x_Sample_Code\Readme.txt

?????文件????????363??2019-02-19?15:07??Sensirion_Humidity_Sensors_SHT3x_Sample_Code\RTE\_STM32-Discovery\RTE_Components.h

?????文件?????252776??2019-02-19?17:12??Sensirion_Humidity_Sensors_SHT3x_Sample_Code\sht3x.crf

?????文件????????653??2019-02-19?17:12??Sensirion_Humidity_Sensors_SHT3x_Sample_Code\sht3x.d

?????文件?????276188??2019-02-19?17:12??Sensirion_Humidity_Sensors_SHT3x_Sample_Code\sht3x.o

?????文件??????44048??2019-02-20?11:46??Sensirion_Humidity_Sensors_SHT3x_Sample_Code\SHT3x_SampleCode.axf

?????文件???????1761??2019-02-20?11:47??Sensirion_Humidity_Sensors_SHT3x_Sample_Code\SHT3x_SampleCode.build_log.htm

?????文件??????68264??2019-02-20?11:46??Sensirion_Humidity_Sensors_SHT3x_Sample_Code\SHT3x_SampleCode.htm

?????文件????????334??2019-02-20?11:46??Sensirion_Humidity_Sensors_SHT3x_Sample_Code\SHT3x_SampleCode.lnp

?????文件??????69450??2019-02-20?11:46??Sensirion_Humidity_Sensors_SHT3x_Sample_Code\SHT3x_SampleCode.map

?????文件????????479??2019-02-19?15:07??Sensirion_Humidity_Sensors_SHT3x_Sample_Code\SHT3x_SampleCode.sct

????.......????169185??2019-02-19?18:03??Sensirion_Humidity_Sensors_SHT3x_Sample_Code\SHT3x_SampleCode.uvguix.victor

?????文件???????9776??2015-05-07?22:24??Sensirion_Humidity_Sensors_SHT3x_Sample_Code\SHT3x_SampleCode.uvopt

????.......??????9362??2019-02-19?18:03??Sensirion_Humidity_Sensors_SHT3x_Sample_Code\SHT3x_SampleCode.uvoptx

?????文件??????16124??2015-05-07?22:24??Sensirion_Humidity_Sensors_SHT3x_Sample_Code\SHT3x_SampleCode.uvproj.saved_uv4

????.......?????15250??2019-02-19?17:12??Sensirion_Humidity_Sensors_SHT3x_Sample_Code\SHT3x_SampleCode.uvprojx

?????文件???????4526??2019-02-20?11:47??Sensirion_Humidity_Sensors_SHT3x_Sample_Code\SHT3x_SampleCode_STM32-Discovery.dep

?????文件??????13466??2015-05-07?22:24??Sensirion_Humidity_Sensors_SHT3x_Sample_Code\SHT3x_Samplecode_Structure.pdf

?????文件???????5661??2019-02-19?15:19??Sensirion_Humidity_Sensors_SHT3x_Sample_Code\Source\i2c_hal.c

?????文件???????2922??2015-05-07?22:24??Sensirion_Humidity_Sensors_SHT3x_Sample_Code\Source\i2c_hal.h

............此處省略21個文件信息