rs232.h

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/*
 * MikroSDK - MikroE Software Development Kit
 * Copyright© 2020 MikroElektronika d.o.o.
 * 
 * Permission is hereby granted, free of charge, to any person 
 * obtaining a copy of this software and associated documentation 
 * files (the "Software"), to deal in the Software without restriction, 
 * including without limitation the rights to use, copy, modify, merge, 
 * publish, distribute, sublicense, and/or sell copies of the Software, 
 * and to permit persons to whom the Software is furnished to do so, 
 * subject to the following conditions:
 * 
 * The above copyright notice and this permission notice shall be 
 * included in all copies or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. 
 * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 
 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE 
 * OR OTHER DEALINGS IN THE SOFTWARE. 
 */
 
// ----------------------------------------------------------------------------
 
#ifndef RS232_H
#define RS232_H
 
#ifdef PREINIT_SUPPORTED
#include "preinit.h"
#endif
 
#ifdef MikroCCoreVersion
    #if MikroCCoreVersion >= 1
        #include "delays.h"
    #endif
#endif
 
#include "drv_digital_out.h"
#include "drv_digital_in.h"
#include "drv_uart.h"
 
// -------------------------------------------------------------- PUBLIC MACROS 
#define RS232_MAP_MIKROBUS( cfg, mikrobus ) \
  cfg.tx_pin  = MIKROBUS( mikrobus, MIKROBUS_TX ); \
  cfg.rx_pin  = MIKROBUS( mikrobus, MIKROBUS_RX ); \
  cfg.rts = MIKROBUS( mikrobus, MIKROBUS_CS ); \
  cfg.cts = MIKROBUS( mikrobus, MIKROBUS_INT )
#define RS232_RETVAL  uint8_t
 
#define RS232_OK           0x00
#define RS232_INIT_ERROR   0xFF
#define DRV_RX_BUFFER_SIZE 500
 // End group macro 
// --------------------------------------------------------------- PUBLIC TYPES
typedef struct
{
    // Output pins 
 
    digital_out_t rts;
 
    // Input pins 
 
    digital_in_t cts;
    
    // Modules 
 
    uart_t uart;
 
    char uart_rx_buffer[ DRV_RX_BUFFER_SIZE ];
    char uart_tx_buffer[ DRV_RX_BUFFER_SIZE ];
 
} rs232_t;
 
typedef struct
{
    // Communication gpio pins 
 
    pin_name_t rx_pin;
    pin_name_t tx_pin;
    
    // Additional gpio pins 
 
    pin_name_t rts;
    pin_name_t cts;
 
    // static variable 
 
    uint32_t          baud_rate;     // Clock speed.
    bool              uart_blocking;
    uart_data_bits_t  data_bit;      // Data bits.
    uart_parity_t     parity_bit;    // Parity bit.  
    uart_stop_bits_t  stop_bit;      // Stop bits.    
 
} rs232_cfg_t;
 
typedef uint8_t rs232_error_t;
 
 // End types group
// ----------------------------------------------- PUBLIC FUNCTION DECLARATIONS
 
#ifdef __cplusplus
extern "C"{
#endif
 
void rs232_cfg_setup ( rs232_cfg_t *cfg );
 
RS232_RETVAL rs232_init ( rs232_t *ctx, rs232_cfg_t *cfg );
 
void rs232_generic_write ( rs232_t *ctx, char *data_buf, uint16_t len );
 
int32_t rs232_generic_read ( rs232_t *ctx, char *data_buf, uint16_t max_len );
 
uint8_t rs232_get_cts_state ( rs232_t *ctx );
 
void rs232_set_rts_state ( rs232_t *ctx, uint8_t state );
 
#ifdef __cplusplus
}
#endif
#endif  // _RS232_H_
 
 // End public_function group
 
// ------------------------------------------------------------------------- END