\mainpage Main Page
Accel 22 Click is a compact add-on board that contains an acceleration sensor. This board features the ADXL367, an ultra-low-power, high-performance three-axis accelerometer from Analog Devices. The ADXL367 allows selectable full-scale acceleration measurements in ranges of ±2g, ±4g, and ±8g in three axes, with a resolution of 0.25 mg/LSB on the ±2g range, alongside a configurable host interface that supports both SPI and I2C serial communication. This device combines a 3-axis MEMS accelerometer, a temperature sensor, and a 14-bit analog-to-digital converter (ADC) to synchronize an external analog signal conversion.
- Author : Stefan Filipovic
- Date : Apr 2022.
- Type : I2C/SPI type
We provide a library for the Accel 22 Click as well as a demo application (example), developed using MikroElektronika compilers. The demo can run on all the main MikroElektronika development boards.
Package can be downloaded/installed directly from NECTO Studio Package Manager(recommended way), downloaded from our LibStock™ or found on Mikroe github account.
This library contains API for Accel 22 Click driver.
accel22_cfg_setup
Config Object Initialization function.
void accel22_cfg_setup ( accel22_cfg_t *cfg );
accel22_init
Initialization function.
err_t accel22_init ( accel22_t *ctx, accel22_cfg_t *cfg );
accel22_default_cfg
Click Default Configuration function.
err_t accel22_default_cfg ( accel22_t *ctx );
accel22_get_axes
This function reads accel X, Y, and Z axis data in mg.
err_t accel22_get_axes ( accel22_t *ctx, accel22_axes_t *axes );
accel22_get_temperature
This function reads the temperature in Celsius.
err_t accel22_get_temperature ( accel22_t *ctx, float *temperature );
accel22_get_adc
This function reads the ADC voltage.
err_t accel22_get_adc ( accel22_t *ctx, float *v_adc );
This example demonstrates the use of Accel 22 click board by reading and displaying Accel data (X, Y, and Z axis) as well as temperature and ADC measurements on the USB UART.
The demo application is composed of two sections :
Initializes the driver and performs the click default configuration.
void application_init ( void )
{
log_cfg_t log_cfg; /**< Logger config object. */
accel22_cfg_t accel22_cfg; /**< Click config object. */
/**
* Logger initialization.
* Default baud rate: 115200
* Default log level: LOG_LEVEL_DEBUG
* @note If USB_UART_RX and USB_UART_TX
* are defined as HAL_PIN_NC, you will
* need to define them manually for log to work.
* See @b LOG_MAP_USB_UART macro definition for detailed explanation.
*/
LOG_MAP_USB_UART( log_cfg );
log_init( &logger, &log_cfg );
log_info( &logger, " Application Init " );
// Click initialization.
accel22_cfg_setup( &accel22_cfg );
ACCEL22_MAP_MIKROBUS( accel22_cfg, MIKROBUS_1 );
err_t init_flag = accel22_init( &accel22, &accel22_cfg );
if ( ( I2C_MASTER_ERROR == init_flag ) || ( SPI_MASTER_ERROR == init_flag ) )
{
log_error( &logger, " Communication init." );
for ( ; ; );
}
if ( ACCEL22_ERROR == accel22_default_cfg ( &accel22 ) )
{
log_error( &logger, " Default configuration." );
for ( ; ; );
}
log_info( &logger, " Application Task " );
}
Reads and displays the Accel data (X, Y, and Z axis) as well as temperature and ADC measurements on the USB UART every 100ms approximately.
void application_task ( void )
{
accel22_axes_t axes;
// Wait for data ready indication
while ( !accel22_get_int1_pin ( &accel22 ) );
if ( ACCEL22_OK == accel22_get_axes ( &accel22, &axes ) )
{
log_printf( &logger, " X: %.2f mg\r\n", axes.x );
log_printf( &logger, " Y: %.2f mg\r\n", axes.y );
log_printf( &logger, " Z: %.2f mg\r\n", axes.z );
}
if ( ACCEL22_OK == accel22_enable_temperature_measurement ( &accel22 ) )
{
float temperature = 0;
// Wait for data ready indication
while ( !accel22_get_int1_pin ( &accel22 ) );
if ( ACCEL22_OK == accel22_get_temperature ( &accel22, &temperature ) )
{
log_printf( &logger, " Temperature: %.2f C\r\n", temperature );
}
}
if ( ACCEL22_OK == accel22_enable_adc_measurement ( &accel22 ) )
{
float adc_voltage = 0;
// Wait for data ready indication
while ( !accel22_get_int1_pin ( &accel22 ) );
if ( ACCEL22_OK == accel22_get_adc ( &accel22, &adc_voltage ) )
{
log_printf( &logger, " ADC: %.2f V\r\n\n", adc_voltage );
}
}
Delay_ms ( 100 );
}
The full application code, and ready to use projects can be installed directly from NECTO Studio Package Manager(recommended way), downloaded from our LibStock™ or found on Mikroe github account.
Other Mikroe Libraries used in the example:
- MikroSDK.Board
- MikroSDK.Log
- Click.Accel22
Additional notes and informations
Depending on the development board you are using, you may need USB UART click, USB UART 2 Click or RS232 Click to connect to your PC, for development systems with no UART to USB interface available on the board. UART terminal is available in all MikroElektronika compilers.