text: /*
   ******************************************************************************
   * @file    activity.c
   * @author  Sensors Software Solution Team
   * @brief   This file show the simplest way to detect activity/inactivity
   *          from sensor.
   *
   ******************************************************************************
   * @attention
   *
   * <h2><center>&copy; Copyright (c) 2020 STMicroelectronics.
   * All rights reserved.</center></h2>
   *
   * This software component is licensed by ST under BSD 3-Clause license,
   * the "License"; You may not use this file except in compliance with the
   * License. You may obtain a copy of the License at:
   *                        opensource.org/licenses/BSD-3-Clause
   *
   ******************************************************************************
   */
  
  /*
   * This example was developed using the following STMicroelectronics
   * evaluation boards:
   *
   * - STEVAL_MKI109V3 + STEVAL-MKI189V1
   * - NUCLEO_F411RE + STEVAL-MKI189V1
   *
   * and STM32CubeMX tool with STM32CubeF4 MCU Package
   *
   * Used interfaces:
   *
   * STEVAL_MKI109V3    - Host side:   USB (Virtual COM)
   *                    - Sensor side: SPI(Default) / I2C(supported)
   *
   * NUCLEO_STM32F411RE - Host side: UART(COM) to USB bridge
   *                    - I2C(Default) / SPI(supported)
   *
   * If you need to run this example on a different hardware platform a
   * modification of the functions: `platform_write`, `platform_read`,
   * `tx_com` and 'platform_init' is required.
   *
   */
  
  /* STMicroelectronics evaluation boards definition
   *
   * Please uncomment ONLY the evaluation boards in use.
   * If a different hardware is used please comment all
   * following target board and redefine yours.
   */
  //#define STEVAL_MKI109V3
  #define NUCLEO_F411RE_X_NUCLEO_IKS01A2
  
  #if defined(STEVAL_MKI109V3)
  /* MKI109V3: Define communication interface */
  #define SENSOR_BUS hspi2
  
  /* MKI109V3: Vdd and Vddio power supply values */
  #define PWM_3V3 915
  
  #elif defined(NUCLEO_F411RE_X_NUCLEO_IKS01A2)
  /* NUCLEO_F411RE_X_NUCLEO_IKS01A2: Define communication interface */
  #define SENSOR_BUS hi2c1
  
  #endif
  
  /* Includes ------------------------------------------------------------------*/
  #include <string.h>
  #include <stdio.h>
  #include "stm32f4xx_hal.h"
  #include <lsm6dsm_reg.h>
  #include "gpio.h"
  #include "i2c.h"
  #if defined(STEVAL_MKI109V3)
  #include "usbd_cdc_if.h"
  #include "spi.h"
  #elif defined(NUCLEO_F411RE_X_NUCLEO_IKS01A2)
  #include "usart.h"
  #endif
  
  /* Private macro -------------------------------------------------------------*/
  
  /* Private variables ---------------------------------------------------------*/
  static uint8_t whoamI, rst;
  static uint8_t tx_buffer[1000];
  
  /* Extern variables ----------------------------------------------------------*/
  
  /* Private functions ---------------------------------------------------------*/
  
  /*
   *   WARNING:
   *   Functions declare in this section are defined at the end of this file
   *   and are strictly related to the hardware platform used.
   *
   */
  static int32_t platform_write(void *handle, uint8_t reg, uint8_t *bufp,
                                uint16_t len);
  static int32_t platform_read(void *handle, uint8_t reg, uint8_t *bufp,
                               uint16_t len);
  static void tx_com( uint8_t *tx_buffer, uint16_t len );
  static void platform_delay(uint32_t ms);
  static void platform_init(void);
  
  /* Main Example --------------------------------------------------------------*/
  void lsm6dsm_activity(void)
  {
    /* Initialize mems driver interface */
    stmdev_ctx_t dev_ctx;
    lsm6dsm_int1_route_t int_1_reg;
  
    /* Uncomment if interrupt generation on Activity/Inactivity INT2 pin */
    //lsm6dsm_int2_route_t int_2_reg;
  
    dev_ctx.write_reg = platform_write;
    dev_ctx.read_reg = platform_read;
    dev_ctx.handle = &SENSOR_BUS;
  
    /* Init test platform */
    platform_init();
  
    /* Wait sensor boot time */
    platform_delay(15);
  
    /* Check device ID */
    lsm6dsm_device_id_get(&dev_ctx, &whoamI);
    if (whoamI != LSM6DSM_ID)
      while(1)
      {
        /* manage here device not found */
      }
  
    /* Restore default configuration */
    lsm6dsm_reset_set(&dev_ctx, PROPERTY_ENABLE);
    do {
      lsm6dsm_reset_get(&dev_ctx, &rst);
    } while (rst);
  
    /* Set XL and Gyro Output Data Rate */
    lsm6dsm_xl_data_rate_set(&dev_ctx, LSM6DSM_XL_ODR_208Hz);
    lsm6dsm_gy_data_rate_set(&dev_ctx, LSM6DSM_GY_ODR_104Hz);
  
    /* Set 2g full XL scale and 250 dps full Gyro */
    lsm6dsm_xl_full_scale_set(&dev_ctx, LSM6DSM_2g);
    lsm6dsm_gy_full_scale_set(&dev_ctx, LSM6DSM_250dps);
  
    /* Set duration for Activity detection to 9.62 ms (= 2 * 1 / ODR_XL) */
    lsm6dsm_wkup_dur_set(&dev_ctx, 0x02);
  
    /* Set duration for Inactivity detection to 4.92 s (= 2 * 512 / ODR_XL) */
    lsm6dsm_act_sleep_dur_set(&dev_ctx, 0x02);
  
    /* Set Activity/Inactivity threshold to 62.5 mg */
    lsm6dsm_wkup_threshold_set(&dev_ctx, 0x02);
  
    /* Inactivity configuration: acc to 12.5 LP, gyro to Power-Down */
    lsm6dsm_act_mode_set(&dev_ctx, LSM6DSM_XL_12Hz5_GY_PD);
  
    /* Enable interrupt generation on Inactivity INT1 pin */
    lsm6dsm_pin_int1_route_get(&dev_ctx, &int_1_reg);
    int_1_reg.int1_inact_state = PROPERTY_ENABLE;
    lsm6dsm_pin_int1_route_set(&dev_ctx, int_1_reg);
  
    /* Uncomment if interrupt generation on Inactivity INT2 pin */
    //lsm6dsm_pin_int2_route_get(&dev_ctx, &int_2_reg);
    //int_2_reg.int2_inact_state = PROPERTY_ENABLE;
    //lsm6dsm_pin_int2_route_set(&dev_ctx, int_2_reg);
  
    /* Wait Events */
    while(1)
    {
      lsm6dsm_all_sources_t all_source;
  
      /* Check if Activity/Inactivity events */
      lsm6dsm_all_sources_get(&dev_ctx, &all_source);
      if (all_source.wake_up_src.sleep_state_ia)
      {
        sprintf((char*)tx_buffer, "Inactivity Detected\r\n");
        tx_com(tx_buffer, strlen((char const*)tx_buffer));
      }
  
      if (all_source.wake_up_src.wu_ia)
      {
        sprintf((char*)tx_buffer, "Activity Detected\r\n");
        tx_com(tx_buffer, strlen((char const*)tx_buffer));
      }
    }
  }
  
  /*
   * @brief  Write generic device register (platform dependent)
   *
   * @param  handle    customizable argument. In this examples is used in
   *                   order to select the correct sensor bus handler.
   * @param  reg       register to write
   * @param  bufp      pointer to data to write in register reg
   * @param  len       number of consecutive register to write
   *
   */
  static int32_t platform_write(void *handle, uint8_t reg, uint8_t *bufp,
                                uint16_t len)
  {
    if (handle == &hi2c1)
    {
      HAL_I2C_Mem_Write(handle, LSM6DSM_I2C_ADD_H, reg,
                        I2C_MEMADD_SIZE_8BIT, bufp, len, 1000);
    }
  #ifdef STEVAL_MKI109V3
    else if (handle == &hspi2)
    {
      HAL_GPIO_WritePin(CS_up_GPIO_Port, CS_up_Pin, GPIO_PIN_RESET);
      HAL_SPI_Transmit(handle, &reg, 1, 1000);
      HAL_SPI_Transmit(handle, bufp, len, 1000);
      HAL_GPIO_WritePin(CS_up_GPIO_Port, CS_up_Pin, GPIO_PIN_SET);
    }
  #endif
    return 0;
  }
  
  /*
   * @brief  Read generic device register (platform dependent)
   *
   * @param  handle    customizable argument. In this examples is used in
   *                   order to select the correct sensor bus handler.
   * @param  reg       register to read
   * @param  bufp      pointer to buffer that store the data read
   * @param  len       number of consecutive register to read
   *
   */
  static int32_t platform_read(void *handle, uint8_t reg, uint8_t *bufp,
                               uint16_t len)
  {
    if (handle == &hi2c1)
    {
      HAL_I2C_Mem_Read(handle, LSM6DSM_I2C_ADD_H, reg,
                       I2C_MEMADD_SIZE_8BIT, bufp, len, 1000);
    }
  #ifdef STEVAL_MKI109V3
    else if (handle == &hspi2)
    {
      /* Read command */
      reg |= 0x80;
      HAL_GPIO_WritePin(CS_up_GPIO_Port, CS_up_Pin, GPIO_PIN_RESET);
      HAL_SPI_Transmit(handle, &reg, 1, 1000);
      HAL_SPI_Receive(handle, bufp, len, 1000);
      HAL_GPIO_WritePin(CS_up_GPIO_Port, CS_up_Pin, GPIO_PIN_SET);
    }
  #endif
    return 0;
  }
  
  /*
   * @brief  Write generic device register (platform dependent)
   *
   * @param  tx_buffer     buffer to trasmit
   * @param  len           number of byte to send
   *
   */
  static void tx_com(uint8_t *tx_buffer, uint16_t len)
  {
    #ifdef NUCLEO_F411RE_X_NUCLEO_IKS01A2
    HAL_UART_Transmit(&huart2, tx_buffer, len, 1000);
    #endif
    #ifdef STEVAL_MKI109V3
    CDC_Transmit_FS(tx_buffer, len);
    #endif
  }
  
  /*
   * @brief  platform specific delay (platform dependent)
   *
   * @param  ms        delay in ms
   *
   */
  static void platform_delay(uint32_t ms)
  {
    HAL_Delay(ms);
  }
  
  /*
   * @brief  platform specific initialization (platform dependent)
   */
  static void platform_init(void)
  {
  #if defined(STEVAL_MKI109V3)
    TIM3->CCR1 = PWM_3V3;
    TIM3->CCR2 = PWM_3V3;
    HAL_TIM_PWM_Start(&htim3, TIM_CHANNEL_1);
    HAL_TIM_PWM_Start(&htim3, TIM_CHANNEL_2);
    HAL_Delay(1000);
  #endif
  }
  