ST / Mbed 2 deprecated FreeFall_IKS01A2

Example of free fall detection for LSM6DSL in X-NUCLEO-IKS01A2

Dependencies:   X_NUCLEO_IKS01A2 mbed

Fork of FreeFall_IKS01A2 by ST Expansion SW Team

Free Fall Detection Demo Application based on sensor expansion board X-NUCLEO-IKS01A2

Main function is to show how to detect the free fall event using the sensor expansion board and send a notification using UART to a connected PC or Desktop and display it on terminal applications like TeraTerm.
After connection has been established:
- the user can try to leave falling the board and then view the notification using an hyper terminal. When the free fall is detected, the LED is switched on for a while.
- the user button can be used to enable/disable the free fall detection feature.

X_NUCLEO_IKS01A2/X_NUCLEO_COMMON/DevI2C/DevI2C.h@0:6a670fda63c2, 2016-08-12 (annotated)

Committer:
cparata
Date:
Fri Aug 12 13:39:06 2016 +0000
Revision:
0:6a670fda63c2
First release of Free Fall for LSM6DSL in IKS01A2

Who changed what in which revision?

UserRevisionLine numberNew contents of line
cparata 0:6a670fda63c2 1 /**
cparata 0:6a670fda63c2 2 ******************************************************************************
cparata 0:6a670fda63c2 3 * @file DevI2C.h
cparata 0:6a670fda63c2 4 * @author AST / EST
cparata 0:6a670fda63c2 5 * @version V0.0.1
cparata 0:6a670fda63c2 6 * @date 21-January-2015
cparata 0:6a670fda63c2 7 * @brief Header file for a special I2C class DevI2C which provides some
cparata 0:6a670fda63c2 8 * helper function for on-board communication
cparata 0:6a670fda63c2 9 ******************************************************************************
cparata 0:6a670fda63c2 10 * @attention
cparata 0:6a670fda63c2 11 *
cparata 0:6a670fda63c2 12 * <h2><center>&copy; COPYRIGHT(c) 2014 STMicroelectronics</center></h2>
cparata 0:6a670fda63c2 13 *
cparata 0:6a670fda63c2 14 * Redistribution and use in source and binary forms, with or without modification,
cparata 0:6a670fda63c2 15 * are permitted provided that the following conditions are met:
cparata 0:6a670fda63c2 16 * 1. Redistributions of source code must retain the above copyright notice,
cparata 0:6a670fda63c2 17 * this list of conditions and the following disclaimer.
cparata 0:6a670fda63c2 18 * 2. Redistributions in binary form must reproduce the above copyright notice,
cparata 0:6a670fda63c2 19 * this list of conditions and the following disclaimer in the documentation
cparata 0:6a670fda63c2 20 * and/or other materials provided with the distribution.
cparata 0:6a670fda63c2 21 * 3. Neither the name of STMicroelectronics nor the names of its contributors
cparata 0:6a670fda63c2 22 * may be used to endorse or promote products derived from this software
cparata 0:6a670fda63c2 23 * without specific prior written permission.
cparata 0:6a670fda63c2 24 *
cparata 0:6a670fda63c2 25 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
cparata 0:6a670fda63c2 26 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
cparata 0:6a670fda63c2 27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
cparata 0:6a670fda63c2 28 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
cparata 0:6a670fda63c2 29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
cparata 0:6a670fda63c2 30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
cparata 0:6a670fda63c2 31 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
cparata 0:6a670fda63c2 32 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
cparata 0:6a670fda63c2 33 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
cparata 0:6a670fda63c2 34 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
cparata 0:6a670fda63c2 35 *
cparata 0:6a670fda63c2 36 ******************************************************************************
cparata 0:6a670fda63c2 37 */
cparata 0:6a670fda63c2 38
cparata 0:6a670fda63c2 39 /* Define to prevent from recursive inclusion --------------------------------*/
cparata 0:6a670fda63c2 40 #ifndef __DEV_I2C_H
cparata 0:6a670fda63c2 41 #define __DEV_I2C_H
cparata 0:6a670fda63c2 42
cparata 0:6a670fda63c2 43 /* Includes ------------------------------------------------------------------*/
cparata 0:6a670fda63c2 44 #include "mbed.h"
cparata 0:6a670fda63c2 45
cparata 0:6a670fda63c2 46 /* Classes -------------------------------------------------------------------*/
cparata 0:6a670fda63c2 47 /** Helper class DevI2C providing functions for multi-register I2C communication
cparata 0:6a670fda63c2 48 * common for a series of I2C devices
cparata 0:6a670fda63c2 49 */
cparata 0:6a670fda63c2 50 class DevI2C : public I2C
cparata 0:6a670fda63c2 51 {
cparata 0:6a670fda63c2 52 public:
cparata 0:6a670fda63c2 53 /** Create a DevI2C Master interface, connected to the specified pins
cparata 0:6a670fda63c2 54 *
cparata 0:6a670fda63c2 55 * @param sda I2C data line pin
cparata 0:6a670fda63c2 56 * @param scl I2C clock line pin
cparata 0:6a670fda63c2 57 */
cparata 0:6a670fda63c2 58 DevI2C(PinName sda, PinName scl) : I2C(sda, scl) {}
cparata 0:6a670fda63c2 59
cparata 0:6a670fda63c2 60 /**
cparata 0:6a670fda63c2 61 * @brief Writes a buffer towards the I2C peripheral device.
cparata 0:6a670fda63c2 62 * @param pBuffer pointer to the byte-array data to send
cparata 0:6a670fda63c2 63 * @param DeviceAddr specifies the peripheral device slave address.
cparata 0:6a670fda63c2 64 * @param RegisterAddr specifies the internal address register
cparata 0:6a670fda63c2 65 * where to start writing to (must be correctly masked).
cparata 0:6a670fda63c2 66 * @param NumByteToWrite number of bytes to be written.
cparata 0:6a670fda63c2 67 * @retval 0 if ok,
cparata 0:6a670fda63c2 68 * @retval -1 if an I2C error has occured, or
cparata 0:6a670fda63c2 69 * @retval -2 on temporary buffer overflow (i.e. NumByteToWrite was too high)
cparata 0:6a670fda63c2 70 * @note On some devices if NumByteToWrite is greater
cparata 0:6a670fda63c2 71 * than one, the RegisterAddr must be masked correctly!
cparata 0:6a670fda63c2 72 */
cparata 0:6a670fda63c2 73 int i2c_write(uint8_t* pBuffer, uint8_t DeviceAddr, uint8_t RegisterAddr,
cparata 0:6a670fda63c2 74 uint16_t NumByteToWrite)
cparata 0:6a670fda63c2 75 {
cparata 0:6a670fda63c2 76 int ret;
cparata 0:6a670fda63c2 77 uint8_t tmp[TEMP_BUF_SIZE];
cparata 0:6a670fda63c2 78
cparata 0:6a670fda63c2 79 if(NumByteToWrite >= TEMP_BUF_SIZE) return -2;
cparata 0:6a670fda63c2 80
cparata 0:6a670fda63c2 81 /* First, send device address. Then, send data and STOP condition */
cparata 0:6a670fda63c2 82 tmp[0] = RegisterAddr;
cparata 0:6a670fda63c2 83 memcpy(tmp+1, pBuffer, NumByteToWrite);
cparata 0:6a670fda63c2 84
cparata 0:6a670fda63c2 85 ret = write(DeviceAddr, (const char*)tmp, NumByteToWrite+1, false);
cparata 0:6a670fda63c2 86
cparata 0:6a670fda63c2 87 if(ret) return -1;
cparata 0:6a670fda63c2 88 return 0;
cparata 0:6a670fda63c2 89 }
cparata 0:6a670fda63c2 90
cparata 0:6a670fda63c2 91 /**
cparata 0:6a670fda63c2 92 * @brief Reads a buffer from the I2C peripheral device.
cparata 0:6a670fda63c2 93 * @param pBuffer pointer to the byte-array to read data in to
cparata 0:6a670fda63c2 94 * @param DaviceAddr specifies the peripheral device slave address.
cparata 0:6a670fda63c2 95 * @param RegisterAddr specifies the internal address register
cparata 0:6a670fda63c2 96 * where to start reading from (must be correctly masked).
cparata 0:6a670fda63c2 97 * @param NumByteToRead number of bytes to be read.
cparata 0:6a670fda63c2 98 * @retval 0 if ok,
cparata 0:6a670fda63c2 99 * @retval -1 if an I2C error has occured
cparata 0:6a670fda63c2 100 * @note On some devices if NumByteToWrite is greater
cparata 0:6a670fda63c2 101 * than one, the RegisterAddr must be masked correctly!
cparata 0:6a670fda63c2 102 */
cparata 0:6a670fda63c2 103 int i2c_read(uint8_t* pBuffer, uint8_t DeviceAddr, uint8_t RegisterAddr,
cparata 0:6a670fda63c2 104 uint16_t NumByteToRead)
cparata 0:6a670fda63c2 105 {
cparata 0:6a670fda63c2 106 int ret;
cparata 0:6a670fda63c2 107
cparata 0:6a670fda63c2 108 /* Send device address, with no STOP condition */
cparata 0:6a670fda63c2 109 ret = write(DeviceAddr, (const char*)&RegisterAddr, 1, true);
cparata 0:6a670fda63c2 110 if(!ret) {
cparata 0:6a670fda63c2 111 /* Read data, with STOP condition */
cparata 0:6a670fda63c2 112 ret = read(DeviceAddr, (char*)pBuffer, NumByteToRead, false);
cparata 0:6a670fda63c2 113 }
cparata 0:6a670fda63c2 114
cparata 0:6a670fda63c2 115 if(ret) return -1;
cparata 0:6a670fda63c2 116 return 0;
cparata 0:6a670fda63c2 117 }
cparata 0:6a670fda63c2 118
cparata 0:6a670fda63c2 119 private:
cparata 0:6a670fda63c2 120 static const unsigned int TEMP_BUF_SIZE = 32;
cparata 0:6a670fda63c2 121 };
cparata 0:6a670fda63c2 122
cparata 0:6a670fda63c2 123 #endif /* __DEV_I2C_H */