accel21  2.1.0.0
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Accel 21 click

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Click library

  • Author : Nenad Filipovic
  • Date : Dec 2022.
  • Type : I2C/SPI type

Software Support

We provide a library for the Accel 21 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.

Library Description

This library contains API for Accel 21 Click driver.

Standard key functions :

Example key functions :

Example Description

This library contains API for Accel 21 Click driver. The library initializes and defines the I2C or SPI bus drivers to write and read data from registers. The library also includes a function for reading X-axis, Y-axis, and Z-axis data.

The demo application is composed of two sections :

Application Init

The initialization of I2C or SPI module, log UART, and additional pins. After the driver init, the app executes a default configuration, checks communication and device ID.

void application_init ( void )
{
log_cfg_t log_cfg;
accel21_cfg_t accel21_cfg;
LOG_MAP_USB_UART( log_cfg );
log_init( &logger, &log_cfg );
log_info( &logger, " Application Init " );
// Click initialization.
accel21_cfg_setup( &accel21_cfg );
ACCEL21_MAP_MIKROBUS( accel21_cfg, MIKROBUS_1 );
err_t init_flag = accel21_init( &accel21, &accel21_cfg );
if ( ( I2C_MASTER_ERROR == init_flag ) || ( SPI_MASTER_ERROR == init_flag ) )
{
log_error( &logger, " Communication init." );
for ( ; ; );
}
if ( ACCEL21_ERROR == accel21_default_cfg ( &accel21 ) )
{
log_error( &logger, " Default configuration." );
for ( ; ; );
}
if ( ACCEL21_ERROR == accel21_check_id ( &accel21 ) )
{
log_printf( &logger, " Communication ERROR \r\n" );
for ( ; ; );
}
log_info( &logger, " Application Task " );
log_printf( &logger, "------------------------\r\n" );
log_printf( &logger, " Accel Data \r\n" );
log_printf( &logger, "------------------------\r\n" );
Delay_ms( 100 );
}

Application Task

This example demonstrates the use of the Accel 21 Click boardâ„¢. Measures and displays acceleration data for X-axis, Y-axis, and Z-axis. Results are being sent to the UART Terminal, where you can track their changes.

void application_task ( void )
{
static accel21_axis_t axis;
accel21_get_axis( &accel21, &axis );
log_printf( &logger, "\tX : %d \r\n\tY : %d \r\n\tZ : %d \r\n", axis.x, axis.y, axis.z );
log_printf( &logger, "------------------------\r\n" );
Delay_ms( 1000 );
}

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.Accel21

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.


accel21_s
Accel 21 Click context object.
Definition: accel21.h:238
accel21_get_axis
err_t accel21_get_axis(accel21_t *ctx, accel21_axis_t *acc_axis)
Accel 21 get accel data function.
accel21_set_config
err_t accel21_set_config(accel21_t *ctx, accel21_config_t config)
Accel 21 set config function.
accel21_axis_t::y
int16_t y
Definition: accel21.h:301
ACCEL21_MAP_MIKROBUS
#define ACCEL21_MAP_MIKROBUS(cfg, mikrobus)
MikroBUS pin mapping.
Definition: accel21.h:202
application_task
void application_task(void)
Definition: main.c:81
accel21_cfg_setup
void accel21_cfg_setup(accel21_cfg_t *cfg)
Accel 21 configuration object setup function.
accel21_init
err_t accel21_init(accel21_t *ctx, accel21_cfg_t *cfg)
Accel 21 initialization function.
accel21_check_id
err_t accel21_check_id(accel21_t *ctx)
Accel 21 check device ID function.
accel21_cfg_t
Accel 21 Click configuration object.
Definition: accel21.h:261
accel21_default_cfg
err_t accel21_default_cfg(accel21_t *ctx)
Accel 21 default configuration function.
ACCEL21_ERROR
@ ACCEL21_ERROR
Definition: accel21.h:290
application_init
void application_init(void)
Definition: main.c:34
accel21_axis_t::x
int16_t x
Definition: accel21.h:300
accel21_config_t
Accel 21 Click configuration structure object.
Definition: accel21.h:311
accel21_get_temperature
err_t accel21_get_temperature(accel21_t *ctx, float *temperature)
Accel 21 get temperature function.
accel21_axis_t::z
int16_t z
Definition: accel21.h:302
accel21_axis_t
Accel 21 Click Axis structure object.
Definition: accel21.h:299