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Author: MIKROE
Last Updated: 2024-10-31
Package Version: 2.1.0.16
mikroSDK Library: 2.0.0.0
Category: RS232
Downloaded: 289 times
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License: MIT license
RS232 Click provides an interface between the TTL/CMOS logic levels commonly used on microcontrollers and the RS-232 bus.
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4232_rs232_click.zip [485.24KB] | 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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RS232 Click provides an interface between the TTL/CMOS logic levels commonly used on microcontrollers and the RS-232 bus.
We provide a library for the Rs232 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.
This library contains API for Rs232 Click driver.
Config Object Initialization function.
void rs232_cfg_setup ( rs232_cfg_t *cfg );
Initialization function.
RS232_RETVAL rs232_init ( rs232_t ctx, rs232_cfg_t cfg );
Generic write function.
void rs232_generic_write ( rs232_t ctx, char data_buf, uint16_t len );
Generic read function.
int32_t rs232_generic_read ( rs232_t ctx, char data_buf, uint16_t max_len );
This example reads and processes data from RS232 clicks.
The demo application is composed of two sections :
Initializes driver.
void application_init ( void )
{
log_cfg_t log_cfg;
rs232_cfg_t cfg;
/**
* 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.
rs232_cfg_setup( &cfg );
RS232_MAP_MIKROBUS( cfg, MIKROBUS_1 );
rs232_init( &rs232, &cfg );
Delay_ms ( 100 );
#ifdef RS232_RECEIVER
log_printf( &logger, " ** RS232 Receiver **\r\n" );
#endif
#ifdef RS232_TRANSMITTER
log_printf( &logger, " ** RS232 Transmitter **\r\n" );
#endif
}
Depending on the selected mode (receiver/transmitter) this function reads/sends an appropriate message. All data is displayed on USB UART.
void application_task ( void )
{
#ifdef RS232_RECEIVER
rsp_size = rs232_generic_read( &rs232, uart_rx_buffer, PROCESS_RX_BUFFER_SIZE );
if ( rsp_size == strlen( message ) )
{
log_printf( &logger, "Message received: %s", uart_rx_buffer );
log_printf( &logger, "\r\n-------------------------\r\n" );
memset( uart_rx_buffer, 0, rsp_size );
}
Delay_ms ( 100 );
#endif
#ifdef RS232_TRANSMITTER
rs232_generic_write( &rs232, message, strlen( message ) );
log_printf( &logger, "Message sent: %s", message );
log_printf( &logger, "\r\n-------------------------\r\n" );
Delay_ms ( 1000 );
#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:
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.