Diff: Components/hts221/hts221_class.cpp

Revision:

4:566f2c41dc1d

Child:

11:001a21c6ac1d

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Components/hts221/hts221_class.cpp	Tue Apr 14 15:32:06 2015 +0200
@@ -0,0 +1,411 @@
+/**
+ ******************************************************************************
+ * @file    hts221.cpp
+ * @author  AST / EST
+ * @version V0.0.1
+ * @date    14-April-2015
+ * @brief   Implementation file for the HTS221 driver class
+ ******************************************************************************
+ * @attention
+ *
+ * <h2><center>&copy; COPYRIGHT(c) 2015 STMicroelectronics</center></h2>
+ *
+ * Redistribution and use in source and binary forms, with or without modification,
+ * are permitted provided that the following conditions are met:
+ *   1. Redistributions of source code must retain the above copyright notice,
+ *      this list of conditions and the following disclaimer.
+ *   2. Redistributions in binary form must reproduce the above copyright notice,
+ *      this list of conditions and the following disclaimer in the documentation
+ *      and/or other materials provided with the distribution.
+ *   3. Neither the name of STMicroelectronics nor the names of its contributors
+ *      may be used to endorse or promote products derived from this software
+ *      without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+ * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ ******************************************************************************
+*/
+
+/* betzw - based on:
+           X-CUBE-MEMS1/trunk/Drivers/BSP/Components/hts221/hts221.c: revision #270,
+           X-CUBE-MEMS1/trunk: revision #293
+*/
+
+/* Includes ------------------------------------------------------------------*/
+#include "mbed.h"
+#include "hts221_class.h"
+#include "hts221.h"
+#include "../../x_nucleo_iks01a1_targets.h"
+
+/* Methods -------------------------------------------------------------------*/
+/**
+ * @brief  HTS221 Calibration procedure
+ * @param  None
+ * @retval HUM_TEMP_OK in case of success, an error code otherwise
+ */
+HUM_TEMP_StatusTypeDef HTS221::HTS221_Calibration(void)
+{
+    /* Temperature Calibration */
+    /* Temperature in degree for calibration ( "/8" to obtain float) */
+    uint16_t T0_degC_x8_L, T0_degC_x8_H, T1_degC_x8_L, T1_degC_x8_H;
+    uint8_t H0_rh_x2, H1_rh_x2;
+    uint8_t tempReg[2] = {0,0};
+
+    if(HTS221_IO_Read(tempReg, HTS221_T0_degC_X8_ADDR, 1) != HUM_TEMP_OK)
+    {
+      return HUM_TEMP_ERROR;
+    }
+    
+    T0_degC_x8_L = (uint16_t)tempReg[0];
+
+    if(HTS221_IO_Read(tempReg, HTS221_T1_T0_MSB_X8_ADDR, 1) != HUM_TEMP_OK)
+    {
+      return HUM_TEMP_ERROR;
+    }
+    
+    T0_degC_x8_H = (uint16_t) (tempReg[0] & 0x03);
+    T0_degC = ((float)((T0_degC_x8_H<<8) | (T0_degC_x8_L)))/8;
+
+    if(HTS221_IO_Read(tempReg, HTS221_T1_degC_X8_ADDR, 1) != HUM_TEMP_OK)
+    {
+      return HUM_TEMP_ERROR;
+    }
+    
+    T1_degC_x8_L = (uint16_t)tempReg[0];
+
+    if(HTS221_IO_Read(tempReg, HTS221_T1_T0_MSB_X8_ADDR, 1) != HUM_TEMP_OK)
+    {
+      return HUM_TEMP_ERROR;
+    }
+    
+    T1_degC_x8_H = (uint16_t) (tempReg[0] & 0x0C);
+    T1_degC_x8_H = T1_degC_x8_H >> 2;
+    T1_degC = ((float)((T1_degC_x8_H<<8) | (T1_degC_x8_L)))/8;
+
+    if(HTS221_IO_Read(tempReg, (HTS221_T0_OUT_L_ADDR | HTS221_I2C_MULTIPLEBYTE_CMD), 2) != HUM_TEMP_OK)
+    {
+      return HUM_TEMP_ERROR;
+    }
+    
+    T0_out = ((((int16_t)tempReg[1]) << 8)+(int16_t)tempReg[0]);
+
+    if(HTS221_IO_Read(tempReg, (HTS221_T1_OUT_L_ADDR | HTS221_I2C_MULTIPLEBYTE_CMD), 2) != HUM_TEMP_OK)
+    {
+      return HUM_TEMP_ERROR;
+    }
+    
+    T1_out = ((((int16_t)tempReg[1]) << 8)+(int16_t)tempReg[0]);
+
+    /* Humidity Calibration */
+    /* Humidity in degree for calibration ( "/2" to obtain float) */
+
+    if(HTS221_IO_Read(&H0_rh_x2, HTS221_H0_RH_X2_ADDR, 1) != HUM_TEMP_OK)
+    {
+      return HUM_TEMP_ERROR;
+    }
+
+    if(HTS221_IO_Read(&H1_rh_x2, HTS221_H1_RH_X2_ADDR, 1) != HUM_TEMP_OK)
+    {
+      return HUM_TEMP_ERROR;
+    }
+
+    if(HTS221_IO_Read(&tempReg[0], (HTS221_H0_T0_OUT_L_ADDR | HTS221_I2C_MULTIPLEBYTE_CMD), 2) != HUM_TEMP_OK)
+    {
+      return HUM_TEMP_ERROR;
+    }
+    
+    H0_T0_out = ((((int16_t)tempReg[1]) << 8)+(int16_t)tempReg[0]);
+
+    if(HTS221_IO_Read(&tempReg[0], (HTS221_H1_T0_OUT_L_ADDR  | HTS221_I2C_MULTIPLEBYTE_CMD), 2) != HUM_TEMP_OK)
+    {
+      return HUM_TEMP_ERROR;
+    }
+    
+    H1_T0_out = ((((int16_t)tempReg[1]) << 8)+(int16_t)tempReg[0]);
+
+    H0_rh = ((float)H0_rh_x2)/2;
+    H1_rh = ((float)H1_rh_x2)/2;
+    
+    return HUM_TEMP_OK;
+}
+
+
+/**
+ * @brief  Set HTS221 Initialization
+ * @param  HTS221_Init the configuration setting for the HTS221
+ * @retval HUM_TEMP_OK in case of success, an error code otherwise
+ */
+HUM_TEMP_StatusTypeDef HTS221::HTS221_Init(HUM_TEMP_InitTypeDef *HTS221_Init)
+{  
+    uint8_t tmp = 0x00;
+
+    /* Configure the low level interface ---------------------------------------*/
+    if(HTS221_IO_Init() != HUM_TEMP_OK)
+    {
+      return HUM_TEMP_ERROR;
+    }
+
+    if(HTS221_Power_On() != HUM_TEMP_OK)
+    {
+      return HUM_TEMP_ERROR;
+    }
+
+    if(HTS221_Calibration() != HUM_TEMP_OK)
+    {
+      return HUM_TEMP_ERROR;
+    }
+
+    if(HTS221_IO_Read(&tmp, HTS221_CTRL_REG1_ADDR, 1) != HUM_TEMP_OK)
+    {
+      return HUM_TEMP_ERROR;
+    }
+
+    /* Output Data Rate selection */
+    tmp &= ~(HTS221_ODR_MASK);
+    tmp |= HTS221_Init->OutputDataRate;
+
+    if(HTS221_IO_Write(&tmp, HTS221_CTRL_REG1_ADDR, 1) != HUM_TEMP_OK)
+    {
+      return HUM_TEMP_ERROR;
+    }
+    
+    HTS221_IO_ITConfig();
+    
+    return HUM_TEMP_OK;
+}
+
+/**
+ * @brief  Read ID address of HTS221
+ * @param  ht_id the pointer where the ID of the device is stored
+ * @retval HUM_TEMP_OK in case of success, an error code otherwise
+ */
+HUM_TEMP_StatusTypeDef HTS221::HTS221_ReadID(uint8_t *ht_id)
+{
+    if(!ht_id)
+    { 
+      return HUM_TEMP_ERROR; 
+    }
+ 
+    return HTS221_IO_Read(ht_id, HTS221_WHO_AM_I_ADDR, 1);
+}
+
+/**
+ * @brief  Reboot memory content of HTS221
+ * @param  None
+ * @retval HUM_TEMP_OK in case of success, an error code otherwise
+ */
+HUM_TEMP_StatusTypeDef HTS221::HTS221_RebootCmd(void)
+{
+    uint8_t tmpreg;
+
+    /* Read CTRL_REG2 register */
+    if(HTS221_IO_Read(&tmpreg, HTS221_CTRL_REG2_ADDR, 1) != HUM_TEMP_OK)
+    {
+      return HUM_TEMP_ERROR;
+    }
+
+    /* Enable or Disable the reboot memory */
+    tmpreg |= HTS221_BOOT_REBOOTMEMORY;
+
+    /* Write value to MEMS CTRL_REG2 regsister */
+    if(HTS221_IO_Write(&tmpreg, HTS221_CTRL_REG2_ADDR, 1) != HUM_TEMP_OK)
+    {
+      return HUM_TEMP_ERROR;
+    }
+    
+    return HUM_TEMP_OK;
+}
+
+
+/**
+ * @brief  Read HTS221 output register, and calculate the humidity
+ * @param  pfData the pointer to data output
+ * @retval HUM_TEMP_OK in case of success, an error code otherwise
+ */
+HUM_TEMP_StatusTypeDef HTS221::HTS221_GetHumidity(float* pfData)
+{
+    int16_t H_T_out, humidity_t;
+    uint8_t tempReg[2] = {0,0};
+    uint8_t tmp = 0x00;
+    float H_rh;
+    
+    if(HTS221_IO_Read(&tmp, HTS221_CTRL_REG1_ADDR, 1) != HUM_TEMP_OK)
+    {
+      return HUM_TEMP_ERROR;
+    }
+
+    /* Output Data Rate selection */
+    tmp &= (HTS221_ODR_MASK);
+    
+    if(tmp == 0x00)
+    {
+      if(HTS221_IO_Read(&tmp, HTS221_CTRL_REG2_ADDR, 1) != HUM_TEMP_OK)
+      {
+        return HUM_TEMP_ERROR;
+      }
+
+      /* Serial Interface Mode selection */
+      tmp &= ~(HTS221_ONE_SHOT_MASK);
+      tmp |= HTS221_ONE_SHOT_START;
+
+      if(HTS221_IO_Write(&tmp, HTS221_CTRL_REG2_ADDR, 1) != HUM_TEMP_OK)
+      {
+        return HUM_TEMP_ERROR;
+      }
+    
+      do{
+      
+        if(HTS221_IO_Read(&tmp, HTS221_STATUS_REG_ADDR, 1) != HUM_TEMP_OK)
+        {
+          return HUM_TEMP_ERROR;
+        }
+         
+      }while(!(tmp&&0x02));
+    }
+    
+    
+    if(HTS221_IO_Read(&tempReg[0], (HTS221_HUMIDITY_OUT_L_ADDR | HTS221_I2C_MULTIPLEBYTE_CMD), 2) != HUM_TEMP_OK)
+    {
+      return HUM_TEMP_ERROR;
+    }
+    
+    H_T_out = ((((int16_t)tempReg[1]) << 8)+(int16_t)tempReg[0]);
+
+    H_rh = ( float )(((( H_T_out - H0_T0_out ) * ( H1_rh - H0_rh )) / ( H1_T0_out - H0_T0_out )) + H0_rh );
+
+    // Truncate to specific number of decimal digits
+    humidity_t = (uint16_t)(H_rh * pow(10,HUM_DECIMAL_DIGITS));
+    *pfData = ((float)humidity_t)/pow(10,HUM_DECIMAL_DIGITS);
+    
+    // Prevent data going below 0% and above 100% due to linear interpolation
+    if ( *pfData <   0.0f ) *pfData =   0.0f;
+    if ( *pfData > 100.0f ) *pfData = 100.0f;
+    
+    return HUM_TEMP_OK;
+}
+
+/**
+ * @brief  Read HTS221 output register, and calculate the temperature
+ * @param  pfData the pointer to data output
+ * @retval HUM_TEMP_OK in case of success, an error code otherwise
+ */
+HUM_TEMP_StatusTypeDef HTS221::HTS221_GetTemperature(float* pfData)
+{
+    int16_t T_out, temperature_t;
+    uint8_t tempReg[2] = {0,0};
+    uint8_t tmp = 0x00;
+    float T_degC;
+    
+    if(HTS221_IO_Read(&tmp, HTS221_CTRL_REG1_ADDR, 1) != HUM_TEMP_OK)
+    {
+      return HUM_TEMP_ERROR;
+    }
+
+    /* Output Data Rate selection */
+    tmp &= (HTS221_ODR_MASK);
+    
+    if(tmp == 0x00)
+    {
+      if(HTS221_IO_Read(&tmp, HTS221_CTRL_REG2_ADDR, 1) != HUM_TEMP_OK)
+      {
+        return HUM_TEMP_ERROR;
+      }
+
+      /* Serial Interface Mode selection */
+      tmp &= ~(HTS221_ONE_SHOT_MASK);
+      tmp |= HTS221_ONE_SHOT_START;
+
+      if(HTS221_IO_Write(&tmp, HTS221_CTRL_REG2_ADDR, 1) != HUM_TEMP_OK)
+      {
+        return HUM_TEMP_ERROR;
+      }
+    
+      do{
+      
+        if(HTS221_IO_Read(&tmp, HTS221_STATUS_REG_ADDR, 1) != HUM_TEMP_OK)
+        {
+          return HUM_TEMP_ERROR;
+        }
+       
+      }while(!(tmp&&0x01));
+    }
+
+    if(HTS221_IO_Read(&tempReg[0], (HTS221_TEMP_OUT_L_ADDR | HTS221_I2C_MULTIPLEBYTE_CMD), 2) != HUM_TEMP_OK)
+    {
+      return HUM_TEMP_ERROR;
+    }
+    
+    T_out = ((((int16_t)tempReg[1]) << 8)+(int16_t)tempReg[0]);
+
+    T_degC = ((float)(T_out - T0_out))/(T1_out - T0_out) * (T1_degC - T0_degC) + T0_degC;
+
+    temperature_t = (int16_t)(T_degC * pow(10,TEMP_DECIMAL_DIGITS));
+
+    *pfData = ((float)temperature_t)/pow(10,TEMP_DECIMAL_DIGITS);
+    
+    return HUM_TEMP_OK;
+}
+
+
+/**
+ * @brief  Exit the shutdown mode for HTS221
+ * @param  None
+ * @retval HUM_TEMP_OK in case of success, an error code otherwise
+ */
+HUM_TEMP_StatusTypeDef HTS221::HTS221_Power_On(void)
+{
+    uint8_t tmpReg;
+
+    /* Read the register content */
+    if(HTS221_IO_Read(&tmpReg, HTS221_CTRL_REG1_ADDR, 1) != HUM_TEMP_OK)
+    {
+      return HUM_TEMP_ERROR;
+    }
+
+    /* Set the power down bit */
+    tmpReg |= HTS221_MODE_ACTIVE;
+
+    /* Write register */
+    if(HTS221_IO_Write(&tmpReg, HTS221_CTRL_REG1_ADDR, 1) != HUM_TEMP_OK)
+    {
+      return HUM_TEMP_ERROR;
+    }
+    
+    return HUM_TEMP_OK;
+}
+
+/**
+ * @brief  Enter the shutdown mode for HTS221
+ * @param  None
+ * @retval HUM_TEMP_OK in case of success, an error code otherwise
+ */
+HUM_TEMP_StatusTypeDef HTS221::HTS221_Power_OFF(void)
+{
+    uint8_t tmpReg;
+
+    /* Read the register content */
+    if(HTS221_IO_Read(&tmpReg, HTS221_CTRL_REG1_ADDR, 1) != HUM_TEMP_OK)
+    {
+      return HUM_TEMP_ERROR;
+    }
+
+    /* Reset the power down bit */
+    tmpReg &= ~(HTS221_MODE_ACTIVE);
+
+    /* Write register */
+    if(HTS221_IO_Write(&tmpReg, HTS221_CTRL_REG1_ADDR, 1) != HUM_TEMP_OK)
+    {
+      return HUM_TEMP_ERROR;
+    }
+    
+    return HUM_TEMP_OK;
+}