rs4858  2.1.0.0
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RS485 8 click

RS485 8 Click is a compact add-on board that enables communication over an RS485 network. This board features the THVD1426, an RS485 transceiver with auto-direction control and ESD protection from Texas Instruments. The THVD1426 offers bus protection for contact discharge, air gap discharge, fast transient burst, and +/-16V bus fault protection.

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Click library

  • Author : Stefan Ilic
  • Date : May 2023.
  • Type : UART type

Software Support

We provide a library for the RS485 8 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 RS485 8 Click driver.

Standard key functions :

Example key functions :

Example Description

This example reads and processes data from RS485 8 clicks.

The library also includes a function for enabling/disabling the receiver or driver and data writing or reading.

The demo application is composed of two sections :

Application Init

Initializes the driver and performs the click default configuration.

void application_init ( void )
{
log_cfg_t log_cfg;
rs4858_cfg_t rs4858_cfg;
LOG_MAP_USB_UART( log_cfg );
log_init( &logger, &log_cfg );
log_info( &logger, " Application Init " );
// Click initialization.
rs4858_cfg_setup( &rs4858_cfg );
RS4858_MAP_MIKROBUS( rs4858_cfg, MIKROBUS_2 );
if ( UART_ERROR == rs4858_init( &rs4858, &rs4858_cfg ) )
{
log_error( &logger, " Communication init." );
for ( ; ; );
}
rs4858_default_cfg ( &rs4858 );
#ifdef DEMO_APP_TRANSMITTER
log_info( &logger, "---- Transmitter mode ----" );
#else
log_info( &logger, "---- Receiver mode ----" );
#endif
log_info( &logger, " Application Task " );
Delay_ms( 100 );
}

Application Task

This example demonstrates the use of the RS485 8 Click board.

The app sends a "MikroE" message, reads the received data and parses it. Results are being sent to the UART Terminal, where you can track their changes.

void application_task ( void )
{
#ifdef DEMO_APP_TRANSMITTER
rs4858_generic_write( &rs4858, data_buf, strlen( data_buf ) );
log_info( &logger, "---- Data sent ----" );
Delay_ms( 2000 );
#else
rs4858_process( );
#endif
}

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.RS4858

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.


RS4858_MAP_MIKROBUS
#define RS4858_MAP_MIKROBUS(cfg, mikrobus)
MikroBUS pin mapping.
Definition: rs4858.h:89
rs4858_cfg_setup
void rs4858_cfg_setup(rs4858_cfg_t *cfg)
RS485 8 configuration object setup function.
rs4858_init
err_t rs4858_init(rs4858_t *ctx, rs4858_cfg_t *cfg)
RS485 8 initialization function.
rs4858_generic_write
err_t rs4858_generic_write(rs4858_t *ctx, uint8_t *data_in, uint16_t len)
RS485 8 data writing function.
rs4858_enable_device
void rs4858_enable_device(rs4858_t *ctx)
RS485 8 enable the device function.
data_buf
uint8_t data_buf[8]
Definition: main.c:39
application_task
void application_task(void)
Definition: main.c:95
rs4858_generic_read
err_t rs4858_generic_read(rs4858_t *ctx, uint8_t *data_out, uint16_t len)
RS485 8 data reading function.
rs4858_cfg_t
RS485 8 Click configuration object.
Definition: rs4858.h:120
rs4858_t
RS485 8 Click context object.
Definition: rs4858.h:102
rs4858_default_cfg
void rs4858_default_cfg(rs4858_t *ctx)
RS485 8 default configuration function.
application_init
void application_init(void)
Definition: main.c:56