expand15  2.1.0.0
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Expand 15 click

Expand 15 Click is a compact add-on board that contains a multi-channel I/O expander. This board features the TCAL6416, a general-purpose I/O expansion for most microcontroller families from Texas Instruments.

click Product page


Click library

  • Author : Stefan Ilic
  • Date : Mar 2023.
  • Type : I2C type

Software Support

We provide a library for the Expand 15 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 Expand 15 Click driver.

Standard key functions :

Example key functions :

Example Description

This example demonstrates the use of Expand 15 click board by setting and reading

the ports state.

The demo application is composed of two sections :

Application Init

Initializes the driver and performs the click default configuration which sets

half of the port 0 and port 1 pins as output ( P00, P02, P04, P06, P10, P12, P14 and P16) and the half of the port 0 and port 1 pins as inputs ( P01, P03, P05, P07, P11, P13, P15 and P17).

void application_init ( void )
{
log_cfg_t log_cfg;
expand15_cfg_t expand15_cfg;
LOG_MAP_USB_UART( log_cfg );
log_init( &logger, &log_cfg );
log_info( &logger, " Application Init " );
// Click initialization.
expand15_cfg_setup( &expand15_cfg );
EXPAND15_MAP_MIKROBUS( expand15_cfg, MIKROBUS_1 );
if ( I2C_MASTER_ERROR == expand15_init( &expand15, &expand15_cfg ) )
{
log_error( &logger, " Communication init." );
for ( ; ; );
}
if ( EXPAND15_ERROR == expand15_default_cfg ( &expand15 ) )
{
log_error( &logger, " Default configuration." );
for ( ; ; );
}
log_info( &logger, " Application Task " );
log_printf( &logger, "- - - - - - - - - - - - - - - - - - - - - - - - - - \r\n" );
}

Application Task

Sets the state of the output pins of one port and then reads the status of input pins of that port

and displays the results on the USB UART approximately 2 seconds.

void application_task ( void )
{
uint8_t output_pin_state;
uint8_t input_pin_state;
// Setting port0 output pin ( P00, P02, P04 and P06 ) to high
expand15_set_out_pin_state( &expand15, EXPAND15_PORT_0, output_pin_state );
Delay_ms( 10 );
// Checking state of the input pins on port0
expand15_get_in_pin_state( &expand15, EXPAND15_PORT_0, &input_pin_state );
log_printf( &logger, "OUTPUT PINS HIGH \r\n" );
log_printf( &logger, "INPUT PINS |" );
log_printf( &logger, " P01 : %c |", ( ( input_pin_state & EXPAND15_PIN_01_MASK ) ? 'H' : 'L' ) );
log_printf( &logger, " P03 : %c |", ( ( input_pin_state & EXPAND15_PIN_03_MASK ) ? 'H' : 'L' ) );
log_printf( &logger, " P05 : %c |", ( ( input_pin_state & EXPAND15_PIN_05_MASK ) ? 'H' : 'L' ) );
log_printf( &logger, " P07 : %c \r\n", ( ( input_pin_state & EXPAND15_PIN_07_MASK ) ? 'H' : 'L' ) );
Delay_ms( 500 );
// Setting port0 output pin ( P00, P02, P04 and P06 ) to low
output_pin_state = EXPAND15_ALL_PINS_OFF;
expand15_set_out_pin_state( &expand15, EXPAND15_PORT_0, output_pin_state );
Delay_ms( 10 );
// Checking state of the input pins on port0
expand15_get_in_pin_state( &expand15, EXPAND15_PORT_0, &input_pin_state );
log_printf( &logger, "OUTPUT PINS LOW \r\n" );
log_printf( &logger, "INPUT PINS |" );
log_printf( &logger, " P01 : %c |", ( ( input_pin_state & EXPAND15_PIN_01_MASK ) ? 'H' : 'L' ) );
log_printf( &logger, " P03 : %c |", ( ( input_pin_state & EXPAND15_PIN_03_MASK ) ? 'H' : 'L' ) );
log_printf( &logger, " P05 : %c |", ( ( input_pin_state & EXPAND15_PIN_05_MASK ) ? 'H' : 'L' ) );
log_printf( &logger, " P07 : %c \r\n", ( ( input_pin_state & EXPAND15_PIN_07_MASK ) ? 'H' : 'L' ) );
log_printf( &logger, "- - - - - - - - - - - - - - - - - - - - - - - - - - \r\n" );
Delay_ms( 2000 );
// Setting port1 output pin ( P10, P12, P14 and P01 ) to high
expand15_set_out_pin_state( &expand15, EXPAND15_PORT_1, output_pin_state );
Delay_ms( 10 );
// Checking state of the input pins on port1
expand15_get_in_pin_state( &expand15, EXPAND15_PORT_1, &input_pin_state );
log_printf( &logger, "OUTPUT PINS HIGH \r\n" );
log_printf( &logger, "INPUT PINS |" );
log_printf( &logger, " P11 : %c |", ( ( input_pin_state & EXPAND15_PIN_11_MASK ) ? 'H' : 'L' ) );
log_printf( &logger, " P13 : %c |", ( ( input_pin_state & EXPAND15_PIN_13_MASK ) ? 'H' : 'L' ) );
log_printf( &logger, " P15 : %c |", ( ( input_pin_state & EXPAND15_PIN_15_MASK ) ? 'H' : 'L' ) );
log_printf( &logger, " P17 : %c \r\n", ( ( input_pin_state & EXPAND15_PIN_17_MASK ) ? 'H' : 'L' ) );
Delay_ms( 500 );
// Setting port1 output pin ( P10, P12, P14 and P16 ) to low
output_pin_state = EXPAND15_ALL_PINS_OFF;
expand15_set_out_pin_state( &expand15, EXPAND15_PORT_1, output_pin_state );
Delay_ms( 10 );
// Checking state of the input pins on port1
expand15_get_in_pin_state( &expand15, EXPAND15_PORT_1, &input_pin_state );
log_printf( &logger, "OUTPUT PINS LOW \r\n" );
log_printf( &logger, "INPUT PINS |" );
log_printf( &logger, " P11 : %c |", ( ( input_pin_state & EXPAND15_PIN_11_MASK ) ? 'H' : 'L' ) );
log_printf( &logger, " P13 : %c |", ( ( input_pin_state & EXPAND15_PIN_13_MASK ) ? 'H' : 'L' ) );
log_printf( &logger, " P15 : %c |", ( ( input_pin_state & EXPAND15_PIN_15_MASK ) ? 'H' : 'L' ) );
log_printf( &logger, " P17 : %c \r\n", ( ( input_pin_state & EXPAND15_PIN_17_MASK ) ? 'H' : 'L' ) );
log_printf( &logger, "- - - - - - - - - - - - - - - - - - - - - - - - - - \r\n" );
Delay_ms( 2000 );
}

Note

In order for this example to work as intended it is necessary to connect the input and output pins

eg. P00 and P01, P02 and P03 etc. Floating input pins will be shown as a high state.

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.Expand15

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.


expand15_hw_reset
void expand15_hw_reset(expand15_t *ctx)
Expand 15 hardware reset function.
expand15_default_cfg
err_t expand15_default_cfg(expand15_t *ctx)
Expand 15 default configuration function.
EXPAND15_PIN_11_MASK
#define EXPAND15_PIN_11_MASK
Definition: expand15.h:109
EXPAND15_PIN_05_MASK
#define EXPAND15_PIN_05_MASK
Definition: expand15.h:105
EXPAND15_PIN_16_MASK
#define EXPAND15_PIN_16_MASK
Definition: expand15.h:114
EXPAND15_PIN_01_MASK
#define EXPAND15_PIN_01_MASK
Definition: expand15.h:101
EXPAND15_PIN_00_MASK
#define EXPAND15_PIN_00_MASK
Expand 15 description setting.
Definition: expand15.h:100
expand15_t
Expand 15 Click context object.
Definition: expand15.h:185
EXPAND15_PIN_02_MASK
#define EXPAND15_PIN_02_MASK
Definition: expand15.h:102
EXPAND15_ERROR
@ EXPAND15_ERROR
Definition: expand15.h:224
expand15_set_out_pin_state
err_t expand15_set_out_pin_state(expand15_t *ctx, uint8_t port, uint8_t pin_state)
Expand 15 set output pin state function.
EXPAND15_ALL_PINS_OFF
#define EXPAND15_ALL_PINS_OFF
Definition: expand15.h:145
expand15_init
err_t expand15_init(expand15_t *ctx, expand15_cfg_t *cfg)
Expand 15 initialization function.
EXPAND15_PIN_17_MASK
#define EXPAND15_PIN_17_MASK
Definition: expand15.h:115
application_task
void application_task(void)
Definition: main.c:73
EXPAND15_PIN_13_MASK
#define EXPAND15_PIN_13_MASK
Definition: expand15.h:111
EXPAND15_PORT_0
#define EXPAND15_PORT_0
Expand 15 port selection setting.
Definition: expand15.h:121
EXPAND15_PIN_15_MASK
#define EXPAND15_PIN_15_MASK
Definition: expand15.h:113
expand15_get_in_pin_state
err_t expand15_get_in_pin_state(expand15_t *ctx, uint8_t port, uint8_t *pin_state)
Expand 15 get input pin state function.
EXPAND15_PIN_07_MASK
#define EXPAND15_PIN_07_MASK
Definition: expand15.h:107
EXPAND15_MAP_MIKROBUS
#define EXPAND15_MAP_MIKROBUS(cfg, mikrobus)
MikroBUS pin mapping.
Definition: expand15.h:171
EXPAND15_PIN_04_MASK
#define EXPAND15_PIN_04_MASK
Definition: expand15.h:104
EXPAND15_PIN_12_MASK
#define EXPAND15_PIN_12_MASK
Definition: expand15.h:110
application_init
void application_init(void)
Definition: main.c:35
EXPAND15_PIN_06_MASK
#define EXPAND15_PIN_06_MASK
Definition: expand15.h:106
EXPAND15_PIN_03_MASK
#define EXPAND15_PIN_03_MASK
Definition: expand15.h:103
EXPAND15_PORT_1
#define EXPAND15_PORT_1
Definition: expand15.h:122
EXPAND15_PIN_14_MASK
#define EXPAND15_PIN_14_MASK
Definition: expand15.h:112
expand15_cfg_setup
void expand15_cfg_setup(expand15_cfg_t *cfg)
Expand 15 configuration object setup function.
expand15_cfg_t
Expand 15 Click configuration object.
Definition: expand15.h:205
EXPAND15_PIN_10_MASK
#define EXPAND15_PIN_10_MASK
Definition: expand15.h:108