rs2323  2.0.0.0
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RS232 3 click

RS232 3 Click is a compact add-on board representing a universal usable RS232 transceiver. This board features the SP3221E, a low-power RS232 transceiver from MaxLinear. The SP3221E uses an internal high-efficiency, charge-pump power supply and is compliant with EIA/TIA-232-F standards when powered by any of the mikroBUSā„¢ power rails. The AUTO ON-LINEĀ® feature allows the SP3221E to automatically "Wake-Up" from a Shutdown state when an RS232 cable is connected and a peripheral device is turned on. When not connected or not in use, the SP3221E will automatically shut down, drawing less supply current.

click Product page


Click library

  • Author : Stefan Filipovic
  • Date : Apr 2022.
  • Type : UART type

Software Support

We provide a library for the RS232 3 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 RS232 3 Click driver.

Standard key functions :

Example key functions :

  • rs2323_generic_write This function writes a desired number of data bytes by using UART serial interface.
    err_t rs2323_generic_write ( rs2323_t *ctx, char *data_buf, uint16_t len );
  • rs2323_generic_read This function reads a desired number of data bytes by using UART serial interface.
    err_t rs2323_generic_read ( rs2323_t *ctx, char *data_buf, uint16_t max_len );

Example Description

This example demonstrates the use of an RS232 3 click board by showing the communication between the two click board configured as a receiver and transmitter.

The demo application is composed of two sections :

Application Init

Initializes the driver and logger and displays the selected application mode.

void application_init ( void )
{
log_cfg_t log_cfg;
rs2323_cfg_t rs2323_cfg;
LOG_MAP_USB_UART( log_cfg );
log_init( &logger, &log_cfg );
log_info( &logger, " Application Init " );
// Click initialization.
rs2323_cfg_setup( &rs2323_cfg );
RS2323_MAP_MIKROBUS( rs2323_cfg, MIKROBUS_1 );
if ( UART_ERROR == rs2323_init( &rs2323, &rs2323_cfg ) )
{
log_error( &logger, " Communication init." );
for ( ; ; );
}
#ifdef DEMO_APP_TRANSMITTER
log_printf( &logger, " Application Mode: Transmitter\r\n" );
#else
log_printf( &logger, " Application Mode: Receiver\r\n" );
#endif
log_info( &logger, " Application Task " );
}

Application Task

Depending on the selected mode, it reads all the received data or sends the desired message every 3 seconds.

void application_task ( void )
{
#ifdef DEMO_APP_TRANSMITTER
log_printf( &logger, "%s", ( char * ) DEMO_TEXT_MESSAGE );
Delay_ms( 3000 );
#else
uint8_t rx_data;
if ( rs2323_generic_read( &rs2323, &rx_data, 1 ) > 0 )
{
log_printf( &logger, "%c", rx_data );
}
#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.RS2323

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.


RS2323_MAP_MIKROBUS
#define RS2323_MAP_MIKROBUS(cfg, mikrobus)
MikroBUS pin mapping.
Definition: rs2323.h:88
rs2323_cfg_t
RS232 3 Click configuration object.
Definition: rs2323.h:127
application_task
void application_task(void)
Definition: main.c:68
rs2323_generic_write
err_t rs2323_generic_write(rs2323_t *ctx, char *data_buf, uint16_t len)
RS232 3 data writing function.
rs2323_cfg_setup
void rs2323_cfg_setup(rs2323_cfg_t *cfg)
RS232 3 configuration object setup function.
rs2323_generic_read
err_t rs2323_generic_read(rs2323_t *ctx, char *data_buf, uint16_t max_len)
RS232 3 data reading function.
application_init
void application_init(void)
Definition: main.c:34
rs2323_init
err_t rs2323_init(rs2323_t *ctx, rs2323_cfg_t *cfg)
RS232 3 initialization function.
rs2323_t
RS232 3 Click context object.
Definition: rs2323.h:104
DEMO_TEXT_MESSAGE
#define DEMO_TEXT_MESSAGE
Definition: main.c:29