bitbang_uart.h

/* ########################################################################
 
   PICsimLab - PIC laboratory simulator
 
   ########################################################################
 
   Copyright (c) : 2020-2022  Luis Claudio Gamboa Lopes
 
   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2, or (at your option)
   any later version.
 
   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.
 
   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 
   For e-mail suggestions :  lcgamboa@yahoo.com
   ######################################################################## */
 
#ifdef __cplusplus
extern "C" {
#endif
 
#ifndef BB_UART
#define BB_UART
 
#include <stdio.h>
 
typedef struct {
  unsigned char prx;          // previous rx value
  unsigned short insr;        // input shift register
  unsigned short outsr;       // output shift register
  unsigned int bcr;           // bit counter read
  unsigned long tcountr;      // clock counter read
  unsigned int bcw;           // bit counter write
  unsigned long tcountw;      // clock counter write
  unsigned long speed;        // serial speed (baud)
  unsigned int cycle_count;   // speed /clock cycle counter
  unsigned int rxc;           // rc clock counter
  unsigned int leds;          // rx tx leds status
  unsigned char datar;        // data received
  unsigned char data_recv;    // flag data received
  unsigned char dataw;        // data to write
  unsigned char data_to_send; // flag data to write
  unsigned long freq;
} bb_uart_t;
typedef struct  {…};
 
void bb_uart_rst(bb_uart_t *bu);
void bb_uart_init(bb_uart_t *bu);
void bb_uart_end(bb_uart_t *bu);
void bb_uart_set_clk_freq(bb_uart_t *bu, unsigned long freq);
void bb_uart_set_speed(bb_uart_t *bu, unsigned int speed);
unsigned char bb_uart_transmitting(bb_uart_t *bu);
void bb_uart_send(bb_uart_t *bu, unsigned char data);
unsigned char bb_uart_data_available(bb_uart_t *bu);
unsigned char bb_uart_recv(bb_uart_t *bu);
void bb_uart_open(bb_uart_t *bu);
unsigned char bb_uart_io(bb_uart_t *bu, unsigned char rx);
 
#endif // BB_UART
 
#ifdef __cplusplus
}
#endif