SHT30 source.rar_SHT30 i2c例程_UYFI_sht30 stm8_sht30 stm8_stm8 i2

//============================================================================= // S E N S I R I O N AG, Laubisruetistr. 50, CH-8712 Staefa, Switzerland //============================================================================= // Project : SHT3x Sample Code (V1.1) // File : sht3x.c (V1.1) // Author : RFU // Date : 6-Mai-2015 // Controller: STM32F100RB // IDE : 猩ision V5.12.0.0 // Compiler : Armcc // Brief : Sensor Layer: Implementation of functions for sensor access. //============================================================================= //-- Includes ----------------------------------------------------------------- #include "sht3x.h" #include "i2c_hal.h" //-- Defines ------------------------------------------------------------------ // Generator polynomial for CRC #define POLYNOMIAL 0x131 // P(x) = x^8 + x^5 + x^4 + 1 = 100110001 //============================================================================= // IO-Pins /* -- adapt the defines for your uC -- */ //----------------------------------------------------------------------------- // Reset on port B, bit 12 #define RESET_LOW() (GPIOB->BSRR = 0x10000000) // set Reset to low #define RESET_HIGH() (GPIOB->BSRR = 0x00001000) // set Reset to high // Alert on port B, bit 10 #define ALERT_READ (GPIOB->IDR & 0x0400) // read Alert //============================================================================= //-- Global variables --------------------------------------------------------- static u8t _i2cAddress; // I2C Address //-- Static function prototypes ----------------------------------------------- static etError SHT3X_WriteAlertLimitData(ft humidity, ft temperature); static etError SHT3X_ReadAlertLimitData(ft* humidity, ft* temperature); static etError SHT3X_StartWriteAccess(void); static etError SHT3X_StartReadAccess(void); static void SHT3X_StopAccess(void); static etError SHT3X_WriteCommand(etCommands command); static etError SHT3X_Read2BytesAndCrc(u16t* data, etI2cAck finaleAckNack, u8t timeout); static etError SHT3X_Write2BytesAndCrc(u16t data); static u8t SHT3X_CalcCrc(u8t data[], u8t nbrOfBytes); static etError SHT3X_CheckCrc(u8t data[], u8t nbrOfBytes, u8t checksum); static ft SHT3X_CalcTemperature(u16t rawValue); static ft SHT3X_CalcHumidity(u16t rawValue); static u16t SHT3X_CalcRawTemperature(ft temperature); static u16t SHT3X_CalcRawHumidity(ft humidity); //----------------------------------------------------------------------------- void SHT3X_Init(u8t i2cAddress) /* -- adapt the init for your uC -- */ { // init I/O-pins RCC->APB2ENR |= 0x00000008; // I/O port B clock enabled // Alert on port B, bit 10 GPIOB->CRH &= 0xFFFFF0FF; // set floating input for Alert-Pin GPIOB->CRH |= 0x00000400; // // Reset on port B, bit 12 GPIOB->CRH &= 0xFFF0FFFF; // set push-pull output for Reset pin GPIOB->CRH |= 0x00010000; // RESET_LOW(); I2c_Init(); // init I2C SHT3X_SetI2cAdr(i2cAddress); // release reset RESET_HIGH(); } //----------------------------------------------------------------------------- void SHT3X_SetI2cAdr(u8t i2cAddress) { _i2cAddress = i2cAddress; } //----------------------------------------------------------------------------- etError SHT3x_ReadSerialNumber(u32t* serialNumber) { etError error; // error code u16t serialNumWords[2]; error = SHT3X_StartWriteAccess(); // write "read serial number" command error |= SHT3X_WriteCommand(CMD_READ_SERIALNBR); // if no error, start read access if(error == NO_ERROR) error = SHT3X_StartReadAccess(); // if no error, read first serial number word if(error == NO_ERROR) error = SHT3X_Read2BytesAndCrc(&serialNumWords[0], ACK, 100); // if no error, read second serial number word if(error == NO_ERROR) error = SHT3X_Read2BytesAndCrc(&serialNumWords[1], NACK, 0); SHT3X_StopAccess(); // if no error, calc serial number as 32-bit integer if(error == NO_ERROR) { *serialNumber = (serialNumWords[0] << 16) | serialNumWords[1]; } return error; } //----------------------------------------------------------------------------- etError SHT3X_ReadStatus(u16t* status) { etError error; // error code error = SHT3X_StartWriteAccess(); // if no error, write "read status" command if(error == NO_ERROR) error = SHT3X_WriteCommand(CMD_READ_STATUS); // if no error, start read access if(error == NO_ERROR) error = SHT3X_StartReadAccess(); // if no error, read status if(error == NO_ERROR) error = SHT3X_Read2BytesAndCrc(status, NACK, 0); SHT3X_StopAccess(); return error; } //----------------------------------------------------------------------------- etError SHT3X_ClearAllAlertFlags(void) { etError error; // error code error = SHT3X_StartWriteAccess(); // if no error, write clear status register command if(error == NO_ERROR) error = SHT3X_WriteCommand(CMD_CLEAR_STATUS); SHT3X_StopAccess(); return error; } //----------------------------------------------------------------------------- etError SHT3X_GetTempAndHumi(ft* temperature, ft* humidity, etRepeatability repeatability, etMode mode, u8t timeout) { etError error; switch(mode) { case MODE_CLKSTRETCH: // get temperature with clock stretching mode error = SHT3X_GetTempAndHumiClkStretch(temperature, humidity, repeatability, timeout); break; case MODE_POLLING: // get temperature with polling mode error = SHT3X_GetTempAndHumiPolling(temperature, humidity, repeatability, timeout); break; default: error = PARM_ERROR; break; } return error; } //----------------------------------------------------------------------------- etError SHT3X_GetTempAndHumiClkStretch(ft* temperature, ft* humidity, etRepeatability repeatability, u8t timeout) { etError error; // error code u16t rawValueTemp; // temperature raw value from sensor u16t rawValueHumi; // humidity raw value from sensor error = SHT3X_StartWriteAccess(); // if no error ... if(error == NO_ERROR) { // start measurement in clock stretching mode // use depending on the required repeatability, the corresponding command switch(repeatability) { case REPEATAB_LOW: error = SHT3X_WriteCommand(CMD_MEAS_CLOCKSTR_L); break; case REPEATAB_MEDIUM: error = SHT3X_WriteCommand(CMD_MEAS_CLOCKSTR_M); break; case REPEATAB_HIGH: error = SHT3X_WriteCommand(CMD_MEAS_CLOCKSTR_H); break; default: error = PARM_ERROR; break; } } // if no error, start read access if(error == NO_ERROR) error = SHT3X_StartReadAccess(); // if no error, read temperature raw values if(error == NO_ERROR) error = SHT3X_Read2BytesAndCrc(&rawValueTemp, ACK, timeout); // if no error, read humidity raw values if(error == NO_ERROR) error = SHT3X_Read2BytesAndCrc(&rawValueHumi, NACK, 0); SHT3X_StopAccess(); // if no error, calculate temperature in 蚓 and humidity in %RH if(error == NO_ERROR) { *temperature = SHT3X_CalcTemperature(rawValueTemp); *humidity = SHT3X_CalcHumidity(rawValueHumi); } return error; } //----------------------------------------------------------------------------- etError SHT3X_GetTempAndHumiPolling(ft* temperature, ft* humidity, etRepeatability