Diff: Components/LPS25H/lps25.cpp

Revision:

0:0433918efb54

Child:

1:354f61ffdcfb

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Components/LPS25H/lps25.cpp	Sat Dec 13 01:09:48 2014 +0000
@@ -0,0 +1,200 @@
+/**
+******************************************************************************
+* @file    x_cube_mems_lps25.cpp
+* @author  AST / EST
+* @version V0.0.1
+* @date    1-December-2014
+* @brief   Implementation file for component LPS25H
+******************************************************************************
+* @attention
+*
+* <h2><center>&copy; COPYRIGHT(c) 2014 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.h"
+#include "lps25h_platform.h"
+
+/* Methods -------------------------------------------------------------------*/
+
+/**
+ * @brief Read LPS25H output register, and calculate the pressure in mbar.
+ * @param float *pressure. Pressure value in mbar.
+ * @retval LPS25H_ERROR or LPS25H_OK.
+ */
+void LPS25H::GetPressure(float* pfData)
+{
+    
+    uint32_t raw_press = 0;
+    
+    if(isInitialized()==0)
+      {
+        pfData = 0;
+        return;
+      }
+    
+    ReadRawPressure(&raw_press);
+
+    /* return the built value */
+    //tempInt = raw_press / 4096;
+
+    *pfData = (float)raw_press /4096.0f;
+}
+
+/**
+ * @brief Read LPS25H output register, and calculate the raw  pressure.
+ * @param uint32_t: raw_press. Pressure raw value.
+ * @retval LPS25H_ERROR or LPS25H_OK.
+ */
+void LPS25H::ReadRawPressure(uint32_t *raw_press)
+{
+    uint8_t buffer[3], i;
+    uint32_t tempVal=0;
+    int ret;
+
+    /* Read the register content */
+    //PRESSURE_IO_Read(buffer, LPS25H_SlaveAddress, LPS25H_PRESS_POUT_XL_ADDR+0x80, 3);
+    ret = dev_i2c.i2c_read(buffer, LPS25H_ADDRESS_HIGH, LPS25H_PRESS_POUT_XL_ADDR+0x80, 3);
+
+    /* 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);
+}
+
+/**
+ * @brief  Read ID address of HTS221
+ * @param  Device ID address
+ * @retval ID name
+ */
+uint8_t LPS25H::ReadID(void)
+{
+    uint8_t tmp;
+
+    /* Read the register content */
+    int ret;    
+    //PRESSURE_IO_Read(&tmp, LPS25H_SlaveAddress, LPS25H_WHO_AM_I_ADDR, 1);
+    ret = dev_i2c.i2c_read(&tmp, LPS25H_ADDRESS_HIGH, LPS25H_WHO_AM_I_ADDR, 1);
+        
+    /* Return the ID */
+    return (uint8_t)tmp;
+}
+
+/**
+ * @brief  Set HTS221 Initialization.
+ * @param  InitStruct: it contains the configuration setting for the HTS221.
+ * @retval None
+ */
+void LPS25H::Init() {
+    int ret;    
+    uint8_t tmp1 = 0x00;
+
+    Power_ON();
+
+    //PRESSURE_IO_Read(&tmp1, LPS25H_SlaveAddress, LPS25H_CTRL_REG1_ADDR, 1);
+    ret = dev_i2c.i2c_read(&tmp1, LPS25H_ADDRESS_HIGH, LPS25H_CTRL_REG1_ADDR, 1);
+    
+    /* Output Data Rate selection */
+    tmp1 &= ~(LPS25H_ODR_MASK);
+    tmp1 |= LPS25H_ODR_1Hz;
+
+    /* Interrupt circuit selection */
+    tmp1 &= ~(LPS25H_DIFF_EN_MASK);
+    tmp1 |= LPS25H_DIFF_ENABLE;
+
+    /* Block Data Update selection */
+    tmp1 &= ~(LPS25H_BDU_MASK);
+    tmp1 |= LPS25H_BDU_CONT;
+
+    /* Serial Interface Mode selection */
+    tmp1 &= ~(LPS25H_SPI_SIM_MASK);
+    tmp1 |= LPS25H_SPI_SIM_3W;
+
+    //PRESSURE_IO_Write(&tmp1, LPS25H_SlaveAddress, LPS25H_CTRL_REG1_ADDR, 1);
+    ret = dev_i2c.i2c_write(&tmp1, LPS25H_ADDRESS_HIGH, LPS25H_CTRL_REG1_ADDR, 1);
+        
+    //PRESSURE_IO_Read(&tmp1, LPS25H_SlaveAddress, LPS25H_RES_CONF_ADDR, 1);
+    ret = dev_i2c.i2c_read(&tmp1, LPS25H_ADDRESS_HIGH, LPS25H_RES_CONF_ADDR, 1);
+
+    /* Pressure Res selection */
+    tmp1 &= ~(LPS25H_P_RES_MASK);
+    tmp1 |= LPS25H_P_RES_AVG_32;
+
+    /* Temperature Res selection */
+    tmp1 &= ~(LPS25H_T_RES_MASK);
+    tmp1 |= LPS25H_T_RES_AVG_16;
+
+    //PRESSURE_IO_Write(&tmp1, LPS25H_SlaveAddress, LPS25H_RES_CONF_ADDR, 1);
+    ret = dev_i2c.i2c_write(&tmp1, LPS25H_ADDRESS_HIGH, LPS25H_RES_CONF_ADDR, 1);
+    
+    if(ReadID() == I_AM_LPS25H)
+    {
+        Lps25hInitialized = 1;
+        //ret = HUM_TEMP_OK;
+    }
+    
+    return;
+}
+
+int LPS25H::Power_ON() {
+    uint8_t tmpreg;
+    int ret;
+
+    /* Read the register content */
+    //PRESSURE_IO_Read(&tmpreg, LPS25H_SlaveAddress, LPS25H_CTRL_REG1_ADDR, 1);
+    ret = dev_i2c.i2c_read(&tmpreg, 0xBA, 0x20, 1);
+    
+    /* Set the power down bit */
+    tmpreg |= LPS25H_MODE_ACTIVE;
+
+    /* Write register */
+    //PRESSURE_IO_Write(&tmpreg, LPS25H_SlaveAddress, LPS25H_CTRL_REG1_ADDR, 1);
+    ret = dev_i2c.i2c_write(&tmpreg, LPS25H_ADDRESS_HIGH, LPS25H_CTRL_REG1_ADDR, 1);
+    return ret;
+    
+}
+
+int LPS25H::LPS25H_Calibration() {
+  
+    int ret;
+    
+    if(Lps25hInitialized == 1)
+    {
+      return 1; //TODO: Error Codes definitions
+    }
+    
+  
+    
+    return ret;
+}