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Accel 28 Click is a compact add-on board that contains an acceleration sensor. This board features the LIS2HH12TR, an ultra-low-power high-performance three-axis accelerometer from STMicroelectronics. It allows selectable full-scale acceleration measurements in ranges of ±2g, ±4g, and ±8g in three axes with a configurable host interface that supports both SPI and I2C serial communication.
- Author : Stefan Ilic
- Date : May 2023.
- Type : I2C/SPI type
We provide a library for the Accel 28 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 28 Click driver.
accel28_cfg_setup
Config Object Initialization function.
void accel28_cfg_setup ( accel28_cfg_t *cfg );
accel28_init
Initialization function.
err_t accel28_init ( accel28_t *ctx, accel28_cfg_t *cfg );
accel28_default_cfg
Click Default Configuration function.
err_t accel28_default_cfg ( accel28_t *ctx );
accel28_get_data
Accel 28 data reading function.
err_t accel28_get_data ( accel28_t *ctx, accel28_data_t *data_out );
accel28_write_reg
Accel 28 register data writing function.
err_t accel28_write_reg ( accel28_t *ctx, uint8_t reg, uint8_t data_in );
accel28_sw_reset
Accel 28 SW reset function.
err_t accel28_sw_reset ( accel28_t *ctx );
This example demonstrates the use of Accel 28 click board by reading and displaying the accelerometer data (X, Y, and Z axis).
The demo application is composed of two sections :
Initializes the driver, performs the click default configuration.
void application_init ( void )
{
log_cfg_t log_cfg; /**< Logger config object. */
accel28_cfg_t accel28_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.
accel28_cfg_setup( &accel28_cfg );
ACCEL28_MAP_MIKROBUS( accel28_cfg, MIKROBUS_1 );
err_t init_flag = accel28_init( &accel28, &accel28_cfg );
if ( ( I2C_MASTER_ERROR == init_flag ) || ( SPI_MASTER_ERROR == init_flag ) )
{
log_error( &logger, " Communication init." );
for ( ; ; );
}
uint8_t id_data = 0;
accel28_generic_read( &accel28, ACCEL28_REG_WHO_AM_I, &id_data, 1 );
if ( ACCEL28_WHO_AM_I_VALUE != id_data )
{
log_error( &logger, " Communication error." );
for ( ; ; );
}
if ( ACCEL28_ERROR == accel28_default_cfg ( &accel28 ) )
{
log_error( &logger, " Default configuration." );
for ( ; ; );
}
log_info( &logger, " Application Task " );
}
Reads and displays on the USB UART the accelerometer data (X, Y, and Z axis) when it is available.
void application_task ( void )
{
err_t error_flag = ACCEL28_OK;
if ( ACCEL28_PIN_STATE_HIGH == accel28_get_int_state( &accel28 ) )
{
uint8_t tmp_data;
error_flag = accel28_read_reg( &accel28, ACCEL28_REG_STATUS, &tmp_data );
if ( ( tmp_data & ACCEL28_STATUS_ZYX_DATA_AVL ) && ( ACCEL28_OK == error_flag ) )
{
error_flag = accel28_get_data( &accel28, &accel_data );
if ( ACCEL28_OK == error_flag )
{
log_printf( &logger, " X-axis %.2f mg\r\n", accel_data.x_data );
log_printf( &logger, " Y-axis %.2f mg\r\n", accel_data.y_data );
log_printf( &logger, " Z-axis %.2f mg\r\n", accel_data.z_data );
log_printf( &logger, " = = = = = = = = = = = = = =\r\n" );
}
}
}
}
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.Accel28
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.