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Author: MIKROE
Last Updated: 2024-10-31
Package Version: 2.1.0.14
mikroSDK Library: 2.0.0.0
Category: Port expander
Downloaded: 159 times
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License: MIT license
Expand 8 Click is a compact add-on board that contains a multi-port I/O expander with bi-directional input/outputs. This board features the MAX7317, 10-Port SPI-interfaced I/O expander with overvoltage and hot-insertion protection from Maxim Integrated.
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4798_expand_8_click.zip [489.21KB] | mikroC AI for ARM GCC for ARM Clang for ARM mikroC AI for PIC mikroC AI for PIC32 XC32 GCC for RISC-V Clang for RISC-V mikroC AI for AVR mikroC AI for dsPIC XC16 |
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Expand 8 Click is a compact add-on board that contains a multi-port I/O expander with bi-directional input/outputs. This board features the MAX7317, 10-Port SPI-interfaced I/O expander with overvoltage and hot-insertion protection from Maxim Integrated.
We provide a library for the Expand8 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 Expand8 Click driver.
expand8_cfg_setup
Config Object Initialization function.
void expand8_cfg_setup ( expand8_cfg_t *cfg );
expand8_init
Initialization function.
err_t expand8_init ( expand8_t *ctx, expand8_cfg_t *cfg );
expand8_write_data
Generic write data function.
void expand8_write_data ( expand8_t *ctx, uint8_t addr, uint8_t tx_data );
expand8_read_data
Generic read data function.
uint8_t expand8_read_data ( expand8_t *ctx, uint8_t addr );
expand8_set_port
Set port function.
err_t expand8_set_port ( expand8_t *ctx, uint8_t sel_port, uint8_t sel_imped );
This is an example that demonstrates the use of the Expand 8 Click board.
The demo application is composed of two sections :
Initialization driver enables - SPI, also write log.
void application_init ( void )
{
log_cfg_t log_cfg; /**< Logger config object. */
expand8_cfg_t expand8_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.
expand8_cfg_setup( &expand8_cfg );
EXPAND8_MAP_MIKROBUS( expand8_cfg, MIKROBUS_1 );
err_t init_flag = expand8_init( &expand8, &expand8_cfg );
if ( SPI_MASTER_ERROR == init_flag ) {
log_error( &logger, " Application Init Error. " );
log_info( &logger, " Please, run program again... " );
for ( ; ; );
}
log_info( &logger, " Application Task " );
select_port = EXPAND8_ADDR_OUT_LVL_PORT_P0;
Delay_ms ( 100 );
}
This example is working by toggling each of 10 available ports every 1 second. Results are being sent to the Uart Terminal where you can track their changes.
void application_task ( void )
{
expand8_set_port( &expand8, select_port, EXPAND8_SET_LOW_IMPEDANCE );
log_printf( &logger, " Port P%d - ON\r\n", ( uint16_t ) select_port );
log_printf( &logger, "- - - - - - - - - - -\r\n" );
Delay_ms ( 1000 );
expand8_set_port( &expand8, select_port, EXPAND8_SET_HIGH_IMPEDANCE );
log_printf( &logger, " Port P%d - OFF\r\n", ( uint16_t ) select_port );
log_printf( &logger, "---------------------\r\n" );
Delay_ms ( 1000 );
select_port++;
if ( select_port > EXPAND8_ADDR_OUT_LVL_PORT_P9 ) {
select_port = EXPAND8_ADDR_OUT_LVL_PORT_P0;
}
}
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:
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. The terminal available in all MikroElektronika compilers, or any other terminal application of your choice, can be used to read the message.