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/**
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******************************************************************************
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* @file stm32f4_discovery_lis302dl.c
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* @author MCD Application Team
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* @version V1.0.0
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* @date 19-September-2011
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* @brief This file provides a set of functions needed to manage the LIS302DL
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* MEMS accelerometer available on STM32F4-Discovery Kit.
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******************************************************************************
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* @attention
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*
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* THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS
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* WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE
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* TIME. AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY
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* DIRECT, INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING
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* FROM THE CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE
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* CODING INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
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*
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* <h2><center>© COPYRIGHT 2011 STMicroelectronics</center></h2>
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******************************************************************************
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*/
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/* Includes ------------------------------------------------------------------*/
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#include "stm32f4_discovery_lis302dl.h"
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//ADDED BY ME!!!!!!!!!!!!!!!!!!!!
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#include "stm32f4xx_conf.h"
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/** @addtogroup Utilities
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* @{
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*/
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/** @addtogroup STM32F4_DISCOVERY
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* @{
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*/
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/** @addtogroup STM32F4_DISCOVERY_LIS302DL
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* @{
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*/
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/** @defgroup STM32F4_DISCOVERY_LIS302DL_Private_TypesDefinitions
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* @{
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*/
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/**
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* @}
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*/
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/** @defgroup STM32F4_DISCOVERY_LIS302DL_Private_Defines
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* @{
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*/
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__IO uint32_t LIS302DLTimeout = LIS302DL_FLAG_TIMEOUT;
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/* Read/Write command */
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#define READWRITE_CMD ((uint8_t)0x80)
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/* Multiple byte read/write command */
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#define MULTIPLEBYTE_CMD ((uint8_t)0x40)
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/* Dummy Byte Send by the SPI Master device in order to generate the Clock to the Slave device */
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#define DUMMY_BYTE ((uint8_t)0x00)
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/**
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* @}
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*/
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/** @defgroup STM32F4_DISCOVERY_LIS302DL_Private_Macros
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* @{
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*/
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/**
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* @}
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*/
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/** @defgroup STM32F4_DISCOVERY_LIS302DL_Private_Variables
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* @{
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*/
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/**
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* @}
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*/
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/** @defgroup STM32F4_DISCOVERY_LIS302DL_Private_FunctionPrototypes
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* @{
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*/
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static uint8_t LIS302DL_SendByte(uint8_t byte);
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static void LIS302DL_LowLevel_Init(void);
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/**
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* @}
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*/
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/** @defgroup STM32F4_DISCOVERY_LIS302DL_Private_Functions
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* @{
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*/
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/**
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* @brief Set LIS302DL Initialization.
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* @param LIS302DL_Config_Struct: pointer to a LIS302DL_Config_TypeDef structure
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* that contains the configuration setting for the LIS302DL.
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* @retval None
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*/
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void LIS302DL_Init(LIS302DL_InitTypeDef *LIS302DL_InitStruct)
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{
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uint8_t ctrl = 0x00;
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/* Configure the low level interface ---------------------------------------*/
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LIS302DL_LowLevel_Init();
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/* Configure MEMS: data rate, power mode, full scale, self test and axes */
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ctrl = (uint8_t) (LIS302DL_InitStruct->Output_DataRate | LIS302DL_InitStruct->Power_Mode | \
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LIS302DL_InitStruct->Full_Scale | LIS302DL_InitStruct->Self_Test | \
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LIS302DL_InitStruct->Axes_Enable);
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/* Write value to MEMS CTRL_REG1 regsister */
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LIS302DL_Write(&ctrl, LIS302DL_CTRL_REG1_ADDR, 1);
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}
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/**
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* @brief Set LIS302DL Internal High Pass Filter configuration.
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* @param LIS302DL_Filter_ConfigTypeDef: pointer to a LIS302DL_FilterConfig_TypeDef
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* structure that contains the configuration setting for the LIS302DL Filter.
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* @retval None
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*/
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void LIS302DL_FilterConfig(LIS302DL_FilterConfigTypeDef *LIS302DL_FilterConfigStruct)
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{
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uint8_t ctrl = 0x00;
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/* Read CTRL_REG2 register */
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LIS302DL_Read(&ctrl, LIS302DL_CTRL_REG2_ADDR, 1);
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/* Clear high pass filter cut-off level, interrupt and data selection bits*/
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ctrl &= (uint8_t)~(LIS302DL_FILTEREDDATASELECTION_OUTPUTREGISTER | \
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LIS302DL_HIGHPASSFILTER_LEVEL_3 | \
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LIS302DL_HIGHPASSFILTERINTERRUPT_1_2);
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/* Configure MEMS high pass filter cut-off level, interrupt and data selection bits */
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ctrl |= (uint8_t)(LIS302DL_FilterConfigStruct->HighPassFilter_Data_Selection | \
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LIS302DL_FilterConfigStruct->HighPassFilter_CutOff_Frequency | \
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LIS302DL_FilterConfigStruct->HighPassFilter_Interrupt);
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/* Write value to MEMS CTRL_REG2 register */
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LIS302DL_Write(&ctrl, LIS302DL_CTRL_REG2_ADDR, 1);
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}
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/**
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* @brief Set LIS302DL Interrupt configuration
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* @param LIS302DL_InterruptConfig_TypeDef: pointer to a LIS302DL_InterruptConfig_TypeDef
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* structure that contains the configuration setting for the LIS302DL Interrupt.
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* @retval None
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*/
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void LIS302DL_InterruptConfig(LIS302DL_InterruptConfigTypeDef *LIS302DL_IntConfigStruct)
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{
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uint8_t ctrl = 0x00;
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/* Read CLICK_CFG register */
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LIS302DL_Read(&ctrl, LIS302DL_CLICK_CFG_REG_ADDR, 1);
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/* Configure latch Interrupt request, click interrupts and double click interrupts */
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ctrl = (uint8_t)(LIS302DL_IntConfigStruct->Latch_Request| \
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LIS302DL_IntConfigStruct->SingleClick_Axes | \
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LIS302DL_IntConfigStruct->DoubleClick_Axes);
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/* Write value to MEMS CLICK_CFG register */
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LIS302DL_Write(&ctrl, LIS302DL_CLICK_CFG_REG_ADDR, 1);
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}
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/**
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* @brief Change the lowpower mode for LIS302DL
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* @param LowPowerMode: new state for the lowpower mode.
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* This parameter can be one of the following values:
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* @arg LIS302DL_LOWPOWERMODE_POWERDOWN: Power down mode
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* @arg LIS302DL_LOWPOWERMODE_ACTIVE: Active mode
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* @retval None
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*/
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void LIS302DL_LowpowerCmd(uint8_t LowPowerMode)
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{
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uint8_t tmpreg;
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/* Read CTRL_REG1 register */
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LIS302DL_Read(&tmpreg, LIS302DL_CTRL_REG1_ADDR, 1);
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/* Set new low power mode configuration */
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tmpreg &= (uint8_t)~LIS302DL_LOWPOWERMODE_ACTIVE;
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tmpreg |= LowPowerMode;
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/* Write value to MEMS CTRL_REG1 regsister */
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LIS302DL_Write(&tmpreg, LIS302DL_CTRL_REG1_ADDR, 1);
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}
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/**
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* @brief Data Rate command
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* @param DataRateValue: Data rate value
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* This parameter can be one of the following values:
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* @arg LIS302DL_DATARATE_100: 100 Hz output data rate
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* @arg LIS302DL_DATARATE_400: 400 Hz output data rate
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* @retval None
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*/
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void LIS302DL_DataRateCmd(uint8_t DataRateValue)
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{
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uint8_t tmpreg;
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/* Read CTRL_REG1 register */
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LIS302DL_Read(&tmpreg, LIS302DL_CTRL_REG1_ADDR, 1);
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/* Set new Data rate configuration */
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tmpreg &= (uint8_t)~LIS302DL_DATARATE_400;
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tmpreg |= DataRateValue;
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/* Write value to MEMS CTRL_REG1 regsister */
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LIS302DL_Write(&tmpreg, LIS302DL_CTRL_REG1_ADDR, 1);
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}
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/**
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* @brief Change the Full Scale of LIS302DL
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* @param FS_value: new full scale value.
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* This parameter can be one of the following values:
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* @arg LIS302DL_FULLSCALE_2_3: +-2.3g
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* @arg LIS302DL_FULLSCALE_9_2: +-9.2g
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* @retval None
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*/
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void LIS302DL_FullScaleCmd(uint8_t FS_value)
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{
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uint8_t tmpreg;
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/* Read CTRL_REG1 register */
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LIS302DL_Read(&tmpreg, LIS302DL_CTRL_REG1_ADDR, 1);
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/* Set new full scale configuration */
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tmpreg &= (uint8_t)~LIS302DL_FULLSCALE_9_2;
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tmpreg |= FS_value;
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/* Write value to MEMS CTRL_REG1 regsister */
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LIS302DL_Write(&tmpreg, LIS302DL_CTRL_REG1_ADDR, 1);
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}
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/**
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* @brief Reboot memory content of LIS302DL
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* @param None
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* @retval None
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*/
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void LIS302DL_RebootCmd(void)
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{
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uint8_t tmpreg;
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/* Read CTRL_REG2 register */
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LIS302DL_Read(&tmpreg, LIS302DL_CTRL_REG2_ADDR, 1);
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/* Enable or Disable the reboot memory */
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tmpreg |= LIS302DL_BOOT_REBOOTMEMORY;
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/* Write value to MEMS CTRL_REG2 regsister */
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LIS302DL_Write(&tmpreg, LIS302DL_CTRL_REG2_ADDR, 1);
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}
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/**
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* @brief Writes one byte to the LIS302DL.
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* @param pBuffer : pointer to the buffer containing the data to be written to the LIS302DL.
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* @param WriteAddr : LIS302DL's internal address to write to.
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* @param NumByteToWrite: Number of bytes to write.
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* @retval None
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*/
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void LIS302DL_Write(uint8_t* pBuffer, uint8_t WriteAddr, uint16_t NumByteToWrite)
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{
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/* Configure the MS bit:
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- When 0, the address will remain unchanged in multiple read/write commands.
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- When 1, the address will be auto incremented in multiple read/write commands.
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*/
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if(NumByteToWrite > 0x01)
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{
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WriteAddr |= (uint8_t)MULTIPLEBYTE_CMD;
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}
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/* Set chip select Low at the start of the transmission */
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LIS302DL_CS_LOW();
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/* Send the Address of the indexed register */
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LIS302DL_SendByte(WriteAddr);
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/* Send the data that will be written into the device (MSB First) */
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while(NumByteToWrite >= 0x01)
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{
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LIS302DL_SendByte(*pBuffer);
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NumByteToWrite--;
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pBuffer++;
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}
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/* Set chip select High at the end of the transmission */
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LIS302DL_CS_HIGH();
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}
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/**
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* @brief Reads a block of data from the LIS302DL.
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* @param pBuffer : pointer to the buffer that receives the data read from the LIS302DL.
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* @param ReadAddr : LIS302DL's internal address to read from.
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* @param NumByteToRead : number of bytes to read from the LIS302DL.
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* @retval None
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*/
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void LIS302DL_Read(uint8_t* pBuffer, uint8_t ReadAddr, uint16_t NumByteToRead)
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{
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if(NumByteToRead > 0x01)
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{
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ReadAddr |= (uint8_t)(READWRITE_CMD | MULTIPLEBYTE_CMD);
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}
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else
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{
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ReadAddr |= (uint8_t)READWRITE_CMD;
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}
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/* Set chip select Low at the start of the transmission */
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LIS302DL_CS_LOW();
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/* Send the Address of the indexed register */
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LIS302DL_SendByte(ReadAddr);
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/* Receive the data that will be read from the device (MSB First) */
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while(NumByteToRead > 0x00)
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{
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/* Send dummy byte (0x00) to generate the SPI clock to LIS302DL (Slave device) */
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*pBuffer = LIS302DL_SendByte(DUMMY_BYTE);
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NumByteToRead--;
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pBuffer++;
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}
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/* Set chip select High at the end of the transmission */
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LIS302DL_CS_HIGH();
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}
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/**
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* @brief Read LIS302DL output register, and calculate the acceleration
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* ACC[mg]=SENSITIVITY* (out_h*256+out_l)/16 (12 bit rappresentation)
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* @param s16 buffer to store data
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* @retval None
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*/
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void LIS302DL_ReadACC(int32_t* out)
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{
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uint8_t buffer[6];
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uint8_t crtl, i = 0x00;
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LIS302DL_Read(&crtl, LIS302DL_CTRL_REG1_ADDR, 1);
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LIS302DL_Read(buffer, LIS302DL_OUT_X_ADDR, 6);
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switch(crtl & 0x20)
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{
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/* FS bit = 0 ==> Sensitivity typical value = 18milligals/digit*/
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case 0x00:
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for(i=0; i<0x03; i++)
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{
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*out =(int32_t)(LIS302DL_SENSITIVITY_2_3G * (int8_t)buffer[2*i]);
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out++;
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}
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break;
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/* FS bit = 1 ==> Sensitivity typical value = 72milligals/digit*/
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case 0x20:
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for(i=0; i<0x03; i++)
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{
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*out =(int32_t)(LIS302DL_SENSITIVITY_9_2G * (int8_t)buffer[2*i]);
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out++;
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}
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break;
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default:
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break;
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}
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}
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/**
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* @brief Initializes the low level interface used to drive the LIS302DL
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* @param None
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* @retval None
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*/
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static void LIS302DL_LowLevel_Init(void)
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{
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GPIO_InitTypeDef GPIO_InitStructure;
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SPI_InitTypeDef SPI_InitStructure;
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/* Enable the SPI periph */
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RCC_APB2PeriphClockCmd(LIS302DL_SPI_CLK, ENABLE);
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/* Enable SCK, MOSI and MISO GPIO clocks */
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RCC_AHB1PeriphClockCmd(LIS302DL_SPI_SCK_GPIO_CLK | LIS302DL_SPI_MISO_GPIO_CLK | LIS302DL_SPI_MOSI_GPIO_CLK, ENABLE);
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/* Enable CS GPIO clock */
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RCC_AHB1PeriphClockCmd(LIS302DL_SPI_CS_GPIO_CLK, ENABLE);
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/* Enable INT1 GPIO clock */
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RCC_AHB1PeriphClockCmd(LIS302DL_SPI_INT1_GPIO_CLK, ENABLE);
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/* Enable INT2 GPIO clock */
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RCC_AHB1PeriphClockCmd(LIS302DL_SPI_INT2_GPIO_CLK, ENABLE);
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GPIO_PinAFConfig(LIS302DL_SPI_SCK_GPIO_PORT, LIS302DL_SPI_SCK_SOURCE, LIS302DL_SPI_SCK_AF);
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GPIO_PinAFConfig(LIS302DL_SPI_MISO_GPIO_PORT, LIS302DL_SPI_MISO_SOURCE, LIS302DL_SPI_MISO_AF);
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GPIO_PinAFConfig(LIS302DL_SPI_MOSI_GPIO_PORT, LIS302DL_SPI_MOSI_SOURCE, LIS302DL_SPI_MOSI_AF);
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GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
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GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
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GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_DOWN;
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GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
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/* SPI SCK pin configuration */
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GPIO_InitStructure.GPIO_Pin = LIS302DL_SPI_SCK_PIN;
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GPIO_Init(LIS302DL_SPI_SCK_GPIO_PORT, &GPIO_InitStructure);
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/* SPI MOSI pin configuration */
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GPIO_InitStructure.GPIO_Pin = LIS302DL_SPI_MOSI_PIN;
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GPIO_Init(LIS302DL_SPI_MOSI_GPIO_PORT, &GPIO_InitStructure);
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/* SPI MISO pin configuration */
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GPIO_InitStructure.GPIO_Pin = LIS302DL_SPI_MISO_PIN;
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GPIO_Init(LIS302DL_SPI_MISO_GPIO_PORT, &GPIO_InitStructure);
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/* SPI configuration -------------------------------------------------------*/
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SPI_I2S_DeInit(LIS302DL_SPI);
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SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex;
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SPI_InitStructure.SPI_DataSize = SPI_DataSize_8b;
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SPI_InitStructure.SPI_CPOL = SPI_CPOL_Low;
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SPI_InitStructure.SPI_CPHA = SPI_CPHA_1Edge;
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SPI_InitStructure.SPI_NSS = SPI_NSS_Soft;
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SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_4;
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SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;
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SPI_InitStructure.SPI_CRCPolynomial = 7;
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SPI_InitStructure.SPI_Mode = SPI_Mode_Master;
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SPI_Init(LIS302DL_SPI, &SPI_InitStructure);
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/* Enable SPI1 */
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SPI_Cmd(LIS302DL_SPI, ENABLE);
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/* Configure GPIO PIN for Lis Chip select */
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GPIO_InitStructure.GPIO_Pin = LIS302DL_SPI_CS_PIN;
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GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;
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GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
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GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
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GPIO_Init(LIS302DL_SPI_CS_GPIO_PORT, &GPIO_InitStructure);
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/* Deselect : Chip Select high */
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GPIO_SetBits(LIS302DL_SPI_CS_GPIO_PORT, LIS302DL_SPI_CS_PIN);
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/* Configure GPIO PINs to detect Interrupts */
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GPIO_InitStructure.GPIO_Pin = LIS302DL_SPI_INT1_PIN;
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GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN;
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GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
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GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
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GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
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GPIO_Init(LIS302DL_SPI_INT1_GPIO_PORT, &GPIO_InitStructure);
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GPIO_InitStructure.GPIO_Pin = LIS302DL_SPI_INT2_PIN;
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GPIO_Init(LIS302DL_SPI_INT2_GPIO_PORT, &GPIO_InitStructure);
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}
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/**
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* @brief Sends a Byte through the SPI interface and return the Byte received
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* from the SPI bus.
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* @param Byte : Byte send.
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* @retval The received byte value
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*/
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static uint8_t LIS302DL_SendByte(uint8_t byte)
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{
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/* Loop while DR register in not emplty */
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LIS302DLTimeout = LIS302DL_FLAG_TIMEOUT;
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while (SPI_I2S_GetFlagStatus(LIS302DL_SPI, SPI_I2S_FLAG_TXE) == RESET)
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{
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if((LIS302DLTimeout--) == 0) return LIS302DL_TIMEOUT_UserCallback();
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}
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/* Send a Byte through the SPI peripheral */
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SPI_I2S_SendData(LIS302DL_SPI, byte);
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|
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/* Wait to receive a Byte */
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LIS302DLTimeout = LIS302DL_FLAG_TIMEOUT;
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|
|
while (SPI_I2S_GetFlagStatus(LIS302DL_SPI, SPI_I2S_FLAG_RXNE) == RESET)
|
|
|
{
|
|
|
if((LIS302DLTimeout--) == 0) return LIS302DL_TIMEOUT_UserCallback();
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|
|
}
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|
|
|
|
/* Return the Byte read from the SPI bus */
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|
|
return (uint8_t)SPI_I2S_ReceiveData(LIS302DL_SPI);
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}
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|
|
#ifdef USE_DEFAULT_TIMEOUT_CALLBACK
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|
/**
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|
|
* @brief Basic management of the timeout situation.
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|
|
* @param None.
|
|
|
* @retval None.
|
|
|
*/
|
|
|
uint32_t LIS302DL_TIMEOUT_UserCallback(void)
|
|
|
{
|
|
|
/* Block communication and all processes */
|
|
|
while (1)
|
|
|
{
|
|
|
}
|
|
|
}
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|
#endif /* USE_DEFAULT_TIMEOUT_CALLBACK */
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|
|
/**
|
|
|
* @}
|
|
|
*/
|
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|
|
/**
|
|
|
* @}
|
|
|
*/
|
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|
|
|
/**
|
|
|
* @}
|
|
|
*/
|
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/**
|
|
|
* @}
|
|
|
*/
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/******************* (C) COPYRIGHT 2011 STMicroelectronics *****END OF FILE****/
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