rs4852  2.0.0.0
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RS485 2 click

RS485 2 click is an RS422/485 transceiver Click boardâ„¢, which can be used as an interface between the TTL level UART and the RS422/485 communication bus.

click Product page


Click library

  • Author : Katarina Perendic
  • Date : okt 2019.
  • Type : UART type

Software Support

We provide a library for the Rs4852 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 form compilers IDE(recommended way), or downloaded from our LibStock, or found on mikroE github account.

Library Description

This library contains API for Rs4852 Click driver.

Standard key functions :

  • Config Object Initialization function.

    void rs4852_cfg_setup ( rs4852_cfg_t *cfg );

  • Initialization function.

    RS4852_RETVAL rs4852_init ( rs4852_t *ctx, rs4852_cfg_t *cfg );

  • Click Default Configuration function.

    void rs4852_default_cfg ( rs4852_t *ctx );

Example key functions :

  • Power mode controle pins

    void rs4852_power_mode ( rs4852_t *ctx, uint8_t pin, uint8_t state );

  • Generic single write function.

    void rs4852_generic_single_write ( rs4852_t *ctx, rs4852_data_t tx_data );

  • Generic single read function.

    rs4852_data_t rs4852_generic_single_read ( rs4852_t *ctx );

Examples Description

This demo example shows RS485 communication using RS485 2 click.

The demo application is composed of two sections :

Application Init

Configuring clicks and log objects.

void application_init ( void )
{
log_cfg_t log_cfg;
// Logger initialization.
log_cfg.level = LOG_LEVEL_DEBUG;
LOG_MAP_USB_UART( log_cfg );
log_init( &logger, &log_cfg );
log_info( &logger, "---- Application Init ----" );
// Click initialization.
RS4852_MAP_MIKROBUS( cfg, MIKROBUS_1 );
rs4852_init( &rs4852, &cfg );
}

Application Task

Depending on the selected application mode:

  • DEMO_APP_TRANSMITER - Prints "MikroE" message to UART
  • DEMO_APP_RECEIVER - Reads data from uart and prints to LOG (Default)
void application_task ( void )
{
uint8_t tmp;
// Task implementation.
#ifdef DEMO_APP_RECEIVER
// RECEIVER - UART polling
tmp = rs4852_generic_single_read( &rs4852 );
log_write( &logger, &tmp, LOG_FORMAT_BYTE );
#endif
#ifdef DEMO_APP_TRANSMITER
// TRANSMITER - TX each 2 sec
rs4852_generic_single_write( &rs4852, demo_message[ 0 ] );
Delay_ms( 2000 );
#endif
}

The full application code, and ready to use projects can be installed directly form compilers IDE(recommneded) or found on LibStock page or mikroE GitHub accaunt.

Other mikroE Libraries used in the example:

  • MikroSDK.Board
  • MikroSDK.Log
  • Click.Rs4852

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.


rs4852_generic_single_read
rs4852_data_t rs4852_generic_single_read(rs4852_t *ctx)
Generic single read function.
rs4852_init
RS4852_RETVAL rs4852_init(rs4852_t *ctx, rs4852_cfg_t *cfg)
Initialization function.
rs4852_generic_single_write
void rs4852_generic_single_write(rs4852_t *ctx, rs4852_data_t tx_data)
Generic single write function.
application_task
void application_task(void)
Definition: main.c:58
rs4852_cfg_t
Click configuration structure definition.
Definition: rs4852.h:110
application_init
void application_init(void)
Definition: main.c:39
rs4852_cfg_setup
void rs4852_cfg_setup(rs4852_cfg_t *cfg)
Config Object Initialization function.
RS4852_MAP_MIKROBUS
#define RS4852_MAP_MIKROBUS(cfg, mikrobus)
Definition: rs4852.h:51