/** * @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 */ static PRESSURE_StatusTypeDef LPS25H_I2C_ReadRawPressure(int32_t *raw_press) { uint8_t buffer[3], i; uint32_t tempVal = 0; /* Read the register content */ if(LPS25H_IO_Read(buffer, LPS25H_SlaveAddress, (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 = ((int32_t) tempVal); 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 */ static PRESSURE_StatusTypeDef LPS25H_ReadID(uint8_t *p_id) { if(!p_id) { return PRESSURE_ERROR; } return LPS25H_IO_Read(p_id, LPS25H_SlaveAddress, LPS25H_WHO_AM_I_ADDR, 1); }
/** * @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 */ static PRESSURE_StatusTypeDef 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_SlaveAddress, (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 Enter the shutdown mode for LPS25H * @retval PRESSURE_OK in case of success, an error code otherwise */ static PRESSURE_StatusTypeDef LPS25H_PowerOff(void) { uint8_t tmpreg; /* Read the register content */ if(LPS25H_IO_Read(&tmpreg, LPS25H_SlaveAddress, 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_SlaveAddress, LPS25H_CTRL_REG1_ADDR, 1) != PRESSURE_OK) { return PRESSURE_ERROR; } return PRESSURE_OK; }
/** * @brief Reboot memory content of LPS25H * @retval PRESSURE_OK in case of success, an error code otherwise */ static PRESSURE_StatusTypeDef LPS25H_RebootCmd(void) { uint8_t tmpreg; /* Read CTRL_REG5 register */ if(LPS25H_IO_Read(&tmpreg, LPS25H_SlaveAddress, 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_SlaveAddress, LPS25H_CTRL_REG2_ADDR, 1) != PRESSURE_OK) { return PRESSURE_ERROR; } return PRESSURE_OK; }
/** * @brief Exit the shutdown mode for LPS25H * @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 Set LPS25H Initialization * @param LPS25H_Init the configuration setting for the LPS25H * @retval PRESSURE_OK in case of success, an error code otherwise */ static PRESSURE_StatusTypeDef 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_SlaveAddress, 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_SlaveAddress, LPS25H_CTRL_REG1_ADDR, 1) != PRESSURE_OK) { return PRESSURE_ERROR; } if(LPS25H_IO_Read(&tmp1, LPS25H_SlaveAddress, 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_SlaveAddress, LPS25H_RES_CONF_ADDR, 1) != PRESSURE_OK) { return PRESSURE_ERROR; } LPS25H_IO_ITConfig(); return PRESSURE_OK; }