ZigBee设备无线通讯&串口功能开发

//============================================================================= // S E N S I R I O N //============================================================================= // Project : SHT3x Sample Code (V1.1) // File : sht3x.c (V1.1) // Brief : Sensor Layer: Implementation of functions for sensor access. //============================================================================= //-- Includes ----------------------------------------------------------------- #include <stdio.h> #include "sht3x.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 -- */ //----------------------------------------------------------------------------- #ifndef I2C_ONLY // 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 #else // Reset #define RESET_LOW() ; // set Reset to low #define RESET_HIGH() ; // set Reset to high // Alert #define ALERT_READ (0x00) // read Alert #endif //============================================================================= //-- Global variables --------------------------------------------------------- static uint8 _i2cAddress; // I2C Address //-- Static function prototypes ----------------------------------------------- static etError SHT3X_WriteAlertLimitData(float humidity, float temperature); static etError SHT3X_ReadAlertLimitData(float* humidity, float* 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(uint16* data, etI2cAck finaleAckNack, uint8 timeout); static etError SHT3X_Write2BytesAndCrc(uint16 data); static uint8 SHT3X_CalcCrc(uint8 data[], uint8 nbrOfBytes); static etError SHT3X_CheckCrc(uint8 data[], uint8 nbrOfBytes, uint8 checksum); static float SHT3X_CalcTemperature(uint16 rawValue); static float SHT3X_CalcHumidity(uint16 rawValue); static uint16 SHT3X_CalcRawTemperature(float temperature); static uint16 SHT3X_CalcRawHumidity(float humidity); //----------------------------------------------------------------------------- etError SHT3X_Init(uint8 i2cAddress) /* -- adapt the init for your uC -- */ { etError error = NO_ERROR; // error code #if 0 //原版 // init I/O-pins 初始化MCU控制复位Reset、警报Alert引脚功能 ;// Alert引脚 ;// Reset引脚 RESET_LOW(); I2c_Init(); //Init I2C SHT3X_SetI2cAdr(i2cAddress); //Release reset RESET_HIGH(); return error; #else uint32 serialNumber;// serial number //Init I2C I2c_Init(); SHT3X_SetI2cAdr(i2cAddress); //Reset SHT3X_SoftReset(); // wait 50ms after power on DelayMicroSeconds(50000); error = SHT3x_ReadSerialNumber(&serialNumber); /* (void)serialNumber;//消除编译器警告 */ //printf("SHT3X Serial Number = %lu\r\n", serialNumber); return error; #endif } //----------------------------------------------------------------------------- void SHT3X_SetI2cAdr(uint8 i2cAddress) { _i2cAddress = i2cAddress; } //----------------------------------------------------------------------------- etError SHT3x_ReadSerialNumber(uint32* serialNumber) { etError error; // error code uint16 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 = ((uint32)serialNumWords[0] << 16) | (uint32)serialNumWords[1]; } return error; } //----------------------------------------------------------------------------- etError SHT3X_ReadStatus(uint16* 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(float* temperature, float* humidity, etRepeatability repeatability, etMode mode, uint8 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(float* temperature, float* humidity, etRepeatability repeatability, uint8 timeout) { etError error; // error code uint16 rawValueTemp; // temperature raw value from sensor uint16 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