Diff: Components/lps25h/lps25h_class.cpp

Revision:

6:8d2abd695c52

Child:

24:92cc9c6e4b2b

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Components/lps25h/lps25h_class.cpp	Wed Apr 15 13:45:30 2015 +0200
@@ -0,0 +1,317 @@
+/**
+ ******************************************************************************
+ * @file    lps25h_class.cpp
+ * @author  AST / EST
+ * @version V0.0.1
+ * @date    14-April-2015
+ * @brief   Implementation file for the LPS25H 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.
+ *
+ ******************************************************************************
+*/
+
+/* Includes ------------------------------------------------------------------*/
+#include "mbed.h"
+#include "lps25h_class.h"
+#include "lps25h.h"
+#include "../../x_nucleo_iks01a1_targets.h"
+
+/* Methods -------------------------------------------------------------------*/
+/* betzw - based on:
+           X-CUBE-MEMS1/trunk/Drivers/BSP/Components/lps25h/lps25h.c: revision #184,
+           X-CUBE-MEMS1/trunk: revision #293
+*/
+/**
+ * @brief  Set LPS25H Initialization
+ * @param  LPS25H_Init the configuration setting for the LPS25H
+ * @retval PRESSURE_OK in case of success, an error code otherwise
+ */
+PRESSURE_StatusTypeDef LPS25H::LPS25H_Init(PRESSURE_InitTypeDef *LPS25H_Init)
+{  
+    uint8_t tmp1 = 0x00;
+
+    /* Configure the low level interface ---------------------------------------*/
+    if(LPS25H_IO_Init() != PRESSURE_OK)
+    {
+      return PRESSURE_ERROR;
+    }
+
+    if(LPS25H_PowerOn() != PRESSURE_OK)
+    {
+      return PRESSURE_ERROR;
+    }
+
+    if(LPS25H_IO_Read(&tmp1, LPS25H_CTRL_REG1_ADDR, 1) != PRESSURE_OK)
+    {
+      return PRESSURE_ERROR;
+    }
+
+    /* Output Data Rate selection */
+    tmp1 &= ~(LPS25H_ODR_MASK);
+    tmp1 |= LPS25H_Init->OutputDataRate;
+
+    /* Interrupt circuit selection */
+    tmp1 &= ~(LPS25H_DIFF_EN_MASK);
+    tmp1 |= LPS25H_Init->DiffEnable;
+
+    /* Block Data Update selection */
+    tmp1 &= ~(LPS25H_BDU_MASK);
+    tmp1 |= LPS25H_Init->BlockDataUpdate;
+
+    /* Serial Interface Mode selection */
+    tmp1 &= ~(LPS25H_SPI_SIM_MASK);
+    tmp1 |= LPS25H_Init->SPIMode;
+
+    if(LPS25H_IO_Write(&tmp1, LPS25H_CTRL_REG1_ADDR, 1) != PRESSURE_OK)
+    {
+      return PRESSURE_ERROR;
+    }
+
+    if(LPS25H_IO_Read(&tmp1, LPS25H_RES_CONF_ADDR, 1) != PRESSURE_OK)
+    {
+      return PRESSURE_ERROR;
+    }
+
+    /* Serial Interface Mode selection */
+    tmp1 &= ~(LPS25H_P_RES_MASK);
+    tmp1 |= LPS25H_Init->PressureResolution;
+
+    /* Serial Interface Mode selection */
+    tmp1 &= ~(LPS25H_T_RES_MASK);
+    tmp1 |= LPS25H_Init->TemperatureResolution;
+
+    if(LPS25H_IO_Write(&tmp1, LPS25H_RES_CONF_ADDR, 1) != PRESSURE_OK)
+    {
+      return PRESSURE_ERROR;
+    }
+
+    LPS25H_IO_ITConfig();
+
+    return PRESSURE_OK;
+}
+
+/**
+ * @brief  Read ID address of LPS25H
+ * @param  ht_id the pointer where the ID of the device is stored
+ * @retval PRESSURE_OK in case of success, an error code otherwise
+ */
+PRESSURE_StatusTypeDef LPS25H::LPS25H_ReadID(uint8_t *p_id)
+{
+    if(!p_id)
+    { 
+      return PRESSURE_ERROR;
+    }
+ 
+    return LPS25H_IO_Read(p_id, LPS25H_WHO_AM_I_ADDR, 1);
+}
+
+/**
+ * @brief  Reboot memory content of LPS25H
+ * @param  None
+ * @retval PRESSURE_OK in case of success, an error code otherwise
+ */
+PRESSURE_StatusTypeDef LPS25H::LPS25H_RebootCmd(void)
+{
+    uint8_t tmpreg;
+
+    /* Read CTRL_REG5 register */
+    if(LPS25H_IO_Read(&tmpreg, LPS25H_CTRL_REG2_ADDR, 1) != PRESSURE_OK)
+    {
+      return PRESSURE_ERROR;
+    }
+
+    /* Enable or Disable the reboot memory */
+    tmpreg |= LPS25H_RESET_MEMORY;
+
+    /* Write value to MEMS CTRL_REG5 regsister */
+    if(LPS25H_IO_Write(&tmpreg, LPS25H_CTRL_REG2_ADDR, 1) != PRESSURE_OK)
+    {
+      return PRESSURE_ERROR;
+    }
+    
+    return PRESSURE_OK;
+}
+
+
+/**
+ * @brief  Read LPS25H output register, and calculate the raw pressure
+ * @param  raw_press the pressure raw value
+ * @retval PRESSURE_OK in case of success, an error code otherwise
+ */
+PRESSURE_StatusTypeDef LPS25H::LPS25H_I2C_ReadRawPressure(uint32_t *raw_press)
+{
+    uint8_t buffer[3], i;
+    uint32_t tempVal=0;
+
+    /* Read the register content */
+
+    if(LPS25H_IO_Read(buffer, (LPS25H_PRESS_POUT_XL_ADDR | LPS25H_I2C_MULTIPLEBYTE_CMD), 3) != PRESSURE_OK)
+    {
+      return PRESSURE_ERROR;
+    }
+
+    /* Build the raw data */
+    for (i = 0 ; i < 3 ; i++)
+        tempVal |= (((uint32_t) buffer[i]) << (8 * i));
+
+    /* convert the 2's complement 24 bit to 2's complement 32 bit */
+    if (tempVal & 0x00800000)
+        tempVal |= 0xFF000000;
+
+    /* return the built value */
+    *raw_press = ((uint32_t) tempVal);
+    
+    return PRESSURE_OK;
+}
+
+/**
+ * @brief  Read LPS25H output register, and calculate the pressure in mbar
+ * @param  pfData the pressure value in mbar
+ * @retval PRESSURE_OK in case of success, an error code otherwise
+ */
+PRESSURE_StatusTypeDef LPS25H::LPS25H_GetPressure(float* pfData)
+{
+    uint32_t raw_press = 0;
+
+    if(LPS25H_I2C_ReadRawPressure(&raw_press) != PRESSURE_OK)
+    {
+      return PRESSURE_ERROR;
+    }
+
+    *pfData = (float)raw_press /4096.0f;
+    
+    return PRESSURE_OK;
+}
+
+/**
+ * @brief  Read LPS25H output register, and calculate the raw temperature
+ * @param  raw_data the temperature raw value
+ * @retval PRESSURE_OK in case of success, an error code otherwise
+ */
+PRESSURE_StatusTypeDef LPS25H::LPS25H_I2C_ReadRawTemperature(int16_t *raw_data)
+{
+    uint8_t buffer[2];
+    uint16_t tempVal=0;
+
+    /* Read the register content */
+    if(LPS25H_IO_Read(buffer, (LPS25H_TEMP_OUT_L_ADDR | LPS25H_I2C_MULTIPLEBYTE_CMD), 2) != PRESSURE_OK)
+    {
+      return PRESSURE_ERROR;
+    }
+
+    /* Build the raw value */
+    tempVal = (((uint16_t)buffer[1]) << 8)+(uint16_t)buffer[0];
+
+    /* Return it */
+    *raw_data = ((int16_t)tempVal);
+    
+    return PRESSURE_OK;
+}
+
+/**
+ * @brief  Read LPS25H output register, and calculate the temperature
+ * @param  pfData the temperature value
+ * @retval PRESSURE_OK in case of success, an error code otherwise
+ */
+PRESSURE_StatusTypeDef LPS25H::LPS25H_GetTemperature(float *pfData)
+{
+    int16_t raw_data;
+
+    if(LPS25H_I2C_ReadRawTemperature(&raw_data) != PRESSURE_OK)
+    {
+      return PRESSURE_ERROR;
+    }
+
+    *pfData = (float)((((float)raw_data/480.0f) + 42.5f));
+    
+    return PRESSURE_OK;
+}
+/**
+ * @brief  Exit the shutdown mode for LPS25H
+ * @param  None
+ * @retval PRESSURE_OK in case of success, an error code otherwise
+ */
+PRESSURE_StatusTypeDef LPS25H::LPS25H_PowerOn(void)
+{
+    uint8_t tmpreg;
+
+    /* Read the register content */
+    if(LPS25H_IO_Read(&tmpreg, LPS25H_CTRL_REG1_ADDR, 1) != PRESSURE_OK)
+    {
+      return PRESSURE_ERROR;
+    }
+
+    /* Set the power down bit */
+    tmpreg |= LPS25H_MODE_ACTIVE;
+
+    /* Write register */
+    if(LPS25H_IO_Write(&tmpreg, LPS25H_CTRL_REG1_ADDR, 1) != PRESSURE_OK)
+    {
+      return PRESSURE_ERROR;
+    }
+    
+    return PRESSURE_OK;
+}
+
+
+/**
+ * @brief  Enter the shutdown mode for LPS25H
+ * @param  None
+ * @retval PRESSURE_OK in case of success, an error code otherwise
+ */
+PRESSURE_StatusTypeDef LPS25H::LPS25H_PowerOff(void)
+{
+    uint8_t tmpreg;
+
+    /* Read the register content */
+    if(LPS25H_IO_Read(&tmpreg, LPS25H_CTRL_REG1_ADDR, 1) != PRESSURE_OK)
+    {
+      return PRESSURE_ERROR;
+    }
+
+    /* Reset the power down bit */
+    tmpreg &= ~(LPS25H_MODE_ACTIVE);
+
+    /* Write register */
+    if(LPS25H_IO_Write(&tmpreg, LPS25H_CTRL_REG1_ADDR, 1) != PRESSURE_OK)
+    {
+      return PRESSURE_ERROR;
+    }
+    
+    return PRESSURE_OK;
+}
+
+/**
+ * @brief  Set the slave address according to SA0 bit
+ * @param  SA0_Bit_Status LPS25H_SA0_LOW or LPS25H_SA0_HIGH
+ * @retval None
+ */
+void LPS25H::LPS25H_SlaveAddrRemap(uint8_t SA0_Bit_Status)
+{
+    LPS25H_SlaveAddress = (SA0_Bit_Status==LPS25H_SA0_LOW?LPS25H_ADDRESS_LOW:LPS25H_ADDRESS_HIGH);
+}