ADXL345 Library

ADXL345 Accelerometer sensor driver.

• Full feature
• Support for I2C communication protocol
• Easy to port

Hardware Support

In the current version, the library uses I2C communication protocol. It is easy to port this library to any platform. But now it is ready for use in:

• STM32 (HAL)
• ESP32 (esp-idf)

How To Use

1. Add ADXL345.h and ADXL345.c files to your project. It is optional to use ADXL345_platform.h and ADXL345_platform.c files (open and config ADXL345_platform.h file).
2. Initialize platform-dependent part of handler.
3. Call ADXL345_Init().
4. Call ADXL345_SetAddressI2C().
5. Call other functions and enjoy.

Example

Using ADXL345_platform files

#include <stdio.h>
#include "ADXL345.h"
#include "ADXL345_platform.h"

ADXL345_Handler_t Handler;

void ADXL345_INT1_INT2_ISR(void)
{
  ADXL345_IRQ_Handler(&Handler);
}

int8_t InterruptCallback(ADXL345_Interrupt_t Interrupt)
{
  switch (Interrupt)
  {
  case ADXL345_INTERRUPT_OVERRUN:
    printf("INTERRUPT_OVERRUN\r\n");
    break;

  case ADXL345_INTERRUPT_WATERMARK:
    printf("INTERRUPT_WATERMARK\r\n");
    break;

  case ADXL345_INTERRUPT_FREE_FALL:
    printf("INTERRUPT_FREE_FALL\r\n");
    break;

  case ADXL345_INTERRUPT_INACTIVITY:
    printf("INTERRUPT_INACTIVITY\r\n");
    break;

  case ADXL345_INTERRUPT_ACTIVITY:
    printf("INTERRUPT_ACTIVITY\r\n");
    break;

  case ADXL345_INTERRUPT_DOUBLE_TAP:
    printf("INTERRUPT_DOUBLE_TAP\r\n");
    break;

  case ADXL345_INTERRUPT_SINGLE_TAP:
    printf("INTERRUPT_SINGLE_TAP\r\n");
    break;

  case ADXL345_INTERRUPT_DATA_READY:
    printf("INTERRUPT_DATA_READY\r\n");
    break;
  }

  return 0;
}


int main(void)
{
  // Set External Interrupt to call ADXL345_INT1_INT2_ISR function...

  ADXL345_Platform_Init(&Handler);
  Handler.InterruptCallback = InterruptCallback;
  ADXL345_Init(&Handler);
  ADXL345_SetAddressI2C(&Handler, 0);
  // Some Other Configurations

  while (1)
  {
    // Infinite loop codes 
  }

  ADXL345_DeInit(&Handler);
  return 0;
}

Without using ADXL345_platform files (esp-idf)

#include <stdio.h>
#include <stdint.h>
#include "sdkconfig.h"
#include "esp_system.h"
#include "esp_err.h"
#include "driver/i2c.h"
#include "driver/gpio.h"
#include "freertos/FreeRTOS.h"
#include "ADXL345.h"

#define ADXL345_I2C_NUM   I2C_NUM_1
#define ADXL345_I2C_RATE  100000
#define ADXL345_SCL_GPIO  GPIO_NUM_13
#define ADXL345_SDA_GPIO  GPIO_NUM_14

ADXL345_Handler_t Handler;

int8_t
ADXL345_Platform_Init(void)
{
  i2c_config_t conf;
  conf.mode = I2C_MODE_MASTER;
  conf.sda_io_num = ADXL345_SDA_GPIO;
  conf.sda_pullup_en = GPIO_PULLUP_DISABLE;
  conf.scl_io_num = ADXL345_SCL_GPIO;
  conf.scl_pullup_en = GPIO_PULLUP_DISABLE;
  conf.master.clk_speed = ADXL345_I2C_RATE;
  if (i2c_param_config(ADXL345_I2C_NUM, &conf) != ESP_OK)
    return -1;
  if (i2c_driver_install(ADXL345_I2C_NUM, conf.mode, 0, 0, 0) != ESP_OK)
    return -1;
  return 0;
}

int8_t
ADXL345_Platform_DeInit(void)
{
  i2c_driver_delete(ADXL345_I2C_NUM);
  gpio_reset_pin(ADXL345_SDA_GPIO);
  gpio_reset_pin(ADXL345_SCL_GPIO);
  return 0;
}

int8_t
ADXL345_Platform_Send(uint8_t Address, uint8_t *Data, uint8_t DataLen)
{
  i2c_cmd_handle_t ADXL345_i2c_cmd_handle = 0;
  Address <<= 1;
  Address &= 0xFE;

  ADXL345_i2c_cmd_handle = i2c_cmd_link_create();
  i2c_master_start(ADXL345_i2c_cmd_handle);
  i2c_master_write(ADXL345_i2c_cmd_handle, &Address, 1, 1);
  i2c_master_write(ADXL345_i2c_cmd_handle, Data, DataLen, 1);
  i2c_master_stop(ADXL345_i2c_cmd_handle);
  if (i2c_master_cmd_begin(ADXL345_I2C_NUM, ADXL345_i2c_cmd_handle, 1000 / portTICK_RATE_MS) != ESP_OK)
  {
    i2c_cmd_link_delete(ADXL345_i2c_cmd_handle);
    return -1;
  }
  i2c_cmd_link_delete(ADXL345_i2c_cmd_handle);
  return 0;
}

int8_t
ADXL345_Platform_Receive(uint8_t Address, uint8_t *Data, uint8_t DataLen)
{
  i2c_cmd_handle_t ADXL345_i2c_cmd_handle = 0;
  Address <<= 1;
  Address |= 0x01;

  ADXL345_i2c_cmd_handle = i2c_cmd_link_create();
  i2c_master_start(ADXL345_i2c_cmd_handle);
  i2c_master_write(ADXL345_i2c_cmd_handle, &Address, 1, 1);
  i2c_master_read(ADXL345_i2c_cmd_handle, Data, DataLen, I2C_MASTER_LAST_NACK);
  i2c_master_stop(ADXL345_i2c_cmd_handle);
  if (i2c_master_cmd_begin(ADXL345_I2C_NUM, ADXL345_i2c_cmd_handle, 1000 / portTICK_RATE_MS) != ESP_OK)
  {
    i2c_cmd_link_delete(ADXL345_i2c_cmd_handle);
    return -1;
  }
  i2c_cmd_link_delete(ADXL345_i2c_cmd_handle);
  return 0;
}

void ADXL345_INT1_INT2_ISR(void)
{
  ADXL345_IRQ_Handler(&Handler);
}

int8_t InterruptCallback(ADXL345_Interrupt_t Interrupt)
{
  switch (Interrupt)
  {
  case ADXL345_INTERRUPT_OVERRUN:
    printf("INTERRUPT_OVERRUN\r\n");
    break;

  case ADXL345_INTERRUPT_WATERMARK:
    printf("INTERRUPT_WATERMARK\r\n");
    break;

  case ADXL345_INTERRUPT_FREE_FALL:
    printf("INTERRUPT_FREE_FALL\r\n");
    break;

  case ADXL345_INTERRUPT_INACTIVITY:
    printf("INTERRUPT_INACTIVITY\r\n");
    break;

  case ADXL345_INTERRUPT_ACTIVITY:
    printf("INTERRUPT_ACTIVITY\r\n");
    break;

  case ADXL345_INTERRUPT_DOUBLE_TAP:
    printf("INTERRUPT_DOUBLE_TAP\r\n");
    break;

  case ADXL345_INTERRUPT_SINGLE_TAP:
    printf("INTERRUPT_SINGLE_TAP\r\n");
    break;

  case ADXL345_INTERRUPT_DATA_READY:
    printf("INTERRUPT_DATA_READY\r\n");
    break;
  }

  return 0;
}

int main(void)
{
  // Set External Interrupt to call ADXL345_INT1_INT2_ISR function...

  Handler.PlatformI2CInit    = ADXL345_Platform_Init;
  Handler.PlatformI2CDeInit  = ADXL345_Platform_DeInit;
  Handler.PlatformI2CSend    = ADXL345_Platform_Send;
  Handler.PlatformI2CReceive = ADXL345_Platform_Receive;
  Handler.InterruptCallback  = InterruptCallback;
  ADXL345_Init(&Handler);
  // Some Other Configurations

  while (1)
  {
    // Infinite loop codes 
  }


  ADXL345_DeInit(&Handler);
  return 0;
}