tinyplc.h

单片PLC,AT2581实现梯形图功能,可作为参考

/*
 *  Released under the GNU GPL.  See http://www.gnu.org/licenses/gpl.txt
 *
 *  This program is part of TinyPLC
 *
 *  TinyPLC 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 Foundatation; version 2 of the License.
 *
 *  TinyPLC 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.
 */
/*
 *  My thanks to my employer, Athena Controls (www.athenacontrols.com)
 *  for allowing me to open source this project.
 */
/*
 *  TinyPLC kernel
 *  Processor:   Atmel MEGA1281 or Atmel MEGA2561
 *  Compiler:    Codevision AVR C compiler, 1.24.8e
 *
 *  TinyPLC editor/compiler
 *  Processor:   PC-clone, VESA video (mode 0x105, 1024x768x256)
 *  Compiler:    DeSmet C, version 2.51 (PCC version 1.2)
 *
 *  Revision history:
 *  Programmer        Date       Comments
 *  ----------------  ---------  ---------------------------------------------
 *  William Couture   3/19/2006  Original code
 *  William Couture   9/13/2006  Modify for GPL release
 */

#ifndef TINYPLC_H_
#define TINYPLC_H_

// #define ENABLE_JTAG   /* reserve pins for JTAG debugging */
#define POSITIVE_INPUT_LOGIC  /* an "ON" input will be +5V at the input pin */
#define POSITIVE_OUTPUT_LOGIC  /* an "ON" output will be +5V at the output pin */

#define XTAL 14745600L

#define HEARTBEAT_FREQUENCY 1000  /* 1ms */
#define MS_PER_TICK (1000 / HEARTBEAT_FREQUENCY)

#define REGISTER register  /* not blank, allocate vars to register storage */


#define WDTCSR_UNLOCK          0b00011000
                              /* ...1....  WDCE
                               * ....1...  WDE
                               */
#define WDTCSR_SET_WDT_PERIOD  0b00001111
                              /* 0.......  WDIF
                               * .0......  WDIE OFF, we're in RESET mode
                               * ..0..111  WDP3..WDP0 = 2 second reset
                               * ...0....  WDCE OFF for setting watchdog params
                               * ....1...  WDE ON
                               */


#define OCxA_DISCONNECTED   0b00000000
                           /* 00...... OCxA disconnected */
#define OCxB_DISCONNECTED   0b00000000
                           /* ..00.... OCxB disconnected */

#define TMR_CLOCK_NONE      0b00000000
                           /* .....000 no clock, timer/counter stopped */
#define TMR_CLOCK_FOSC      0b00000001
                           /* .....001 Fosc with no prescalar */
#define TMR_CLOCK_FOSC_8    0b00000010
                           /* .....010 Fosc / 8 */
#define TMR_CLOCK_FOSC_64   0b00000011
                           /* .....011 Fosc / 64 */
#define TMR_CLOCK_FOSC_256  0b00000100
                           /* .....100 Fosc / 256 */
#define TMR_CLOCK_FOSC_1024 0b00000101
                           /* .....101 Fosc / 1024 */
#define TMR_CLK_T0_FALLING  0b00000110
                           /* .....110 exernal clock on T0 pin, falling edge */
#define TMR_CLK_T0_RISING   0b00000111
                           /* .....111 exernal clock on T0 pin, rising edge */
#define TMR0_CYCLES         (XTAL / HEARTBEAT_FREQUENCY)
#if TMR0_CYCLES < 256
   #define TMR0_CLOCK  TMR_CLOCK_FOSC
   #define TMR0_PERIOD (TMR0_CYCLES - 1)
#else
   #if TMR0_CYCLES < (256 * 8)
      #define TMR0_CLOCK  TMR_CLOCK_FOSC_8
      #define TMR0_PERIOD (TMR0_CYCLES / 8 - 1)
   #else
      #if TMR0_CYCLES < (256 * 64)
         #define TMR0_CLOCK  TMR_CLOCK_FOSC_64
         #define TMR0_PERIOD (TMR0_CYCLES / 64 - 1)
      #else
         #if TMR0_CYCLES < (256 * 256)
            #define TMR0_CLOCK  TMR_CLOCK_FOSC_256
            #define TMR0_PERIOD (TMR0_CYCLES / 256 - 1)
         #else
            #define TMR0_CLOCK  TMR_CLOCK_FOSC_1024
            #define TMR0_PERIOD (TMR0_CYCLES / 1024 - 1)
         #endif
      #endif
   #endif
#endif

#define TCCR0A_INIT  (OCxA_DISCONNECTED \
                    | OCxB_DISCONNECTED \
                    | 0b00000010)
                     /* ......10 WGM1:WMG0 - CTC (Clear Timer on Compare match) */
#define TCCR0B_INIT  TMR0_CLOCK  /* this also sets WMG2 bit to 0, high bit of CTC mode */
#define TIMSK0_INIT  0b00000010
                    /* ......1. OCIE0A timer 0 compare A interrupt */

#ifdef POSITIVE_INPUT_LOGIC
   #define INPUT_ON   1
   #define INPUT_OFF  0
#else
   #define INPUT_ON   0
   #define INPUT_OFF  1
#endif

#ifdef POSITIVE_OUTPUT_LOGIC
   #define OUTPUT_ON   1
   #define OUTPUT_OFF  0
#else
   #define OUTPUT_ON   0
   #define OUTPUT_OFF  1
#endif

#define PORTA_DIRECTIONS 0b11111111  /* all outputs */
                        /* A0 == DIG_OUT_0, ... A7 == DIG_OUT_7 */
#ifdef POSITIVE_OUTPUT_LOGIC
   #define PORTA_DEFAULT    0b00000000  /* all OFF */
#else
   #define PORTA_DEFAULT    0b11111111  /* all OFF */
#endif

#define PORTB_DIRECTIONS 0b11111111  /* all outputs */
                        /* B0 == DIG_OUT_8, ... B7 == DIG_OUT_15 */
#ifdef POSITIVE_OUTPUT_LOGIC
   #define PORTB_DEFAULT    0b00000000  /* all OFF */
#else
   #define PORTB_DEFAULT    0b11111111  /* all OFF */
#endif

#define PORTC_DIRECTIONS 0b00000000  /* all inputs */
                        /* C0 == DIG_IN_0, ... C7 == DIG_IN_7 */
#define PORTC_DEFAULT    0b00000000  /* all inputs, don't care */

#define PORTD_DIRECTIONS 0b00000000  /* all inputs */
                        /* D0 == DIG_IN_8, ... D7 == DIG_IN_15 */
#define PORTD_DEFAULT    0b00000000  /* all inputs, don't care */

#define PORTE_DIRECTIONS 0b11111110
                        /* 1....... E7 = OUTPUT  DIG_OUT_20
                         * .1...... E6 = OUTPUT  DIG_OUT_19
                         * ..1..... E5 = OUTPUT  DIG_OUT_18
                         * ...1.... E4 = OUTPUT  DIG_OUT_17
                         * ....1... E3 = OUTPUT  DIG_OUT_16
                         * .....1.. E2 = OUTPUT status LED
                         * ......1. E1 = OUTPUT TX for 1st UART
                         * .......0 E0 = INPUT  RX for 1st UART
                         */
#define STATUS_LED PORTE.2
#ifdef POSITIVE_OUTPUT_LOGIC
   #define PORTE_DEFAULT    0b00000010
                           /* 000000.. E7 .. E2, default OFF
                            * ......1. E1 TX for 1st UART, default HIGH
                            * .......0 E0 RX INPUT, don't care
                            */
   #define STATUS_LED_ON  1
   #define STATUS_LED_OFF 0
#else
   #define PORTE_DEFAULT    0b11111110
                           /* 111111.. E7 .. E2, default OFF
                            * ......1. E1 TX for 1st UART, default HIGH
                            * .......0 E0 RX INPUT, don't care
                            */
   #define STATUS_LED_ON  0
   #define STATUS_LED_OFF 1
#endif

#ifdef ENABLE_JTAG
   #define PORTF_DIRECTIONS 0b11110000
                           /* 1111.... F7..F4, JTAG support
                            * ....0... F3 = ADC3
                            * .....0.. F2 = ADC2
                            * ......0. F1 = ADC1
                            * .......0 F0 = ADC0
                            */
   #define PORTF_DEFAULT    0b00000000
                           /* 0000.... JTAG support, don't care
                            * ....0000 analog inputs, don't care
                            */
   #define TOTAL_ANALOGS    4
#else
   #define PORTF_DIRECTIONS 0b00000000  /* all analog inputs */
   #define PORTF_DEFAULT    0b00000000  /* analog ports, don't care */
   #define TOTAL_ANALOGS    8
#endif

#define PORTG_DIRECTIONS 0b00000000
                        /* 00...... G7, G6 do not exist
                         * ..00000  G5 == DIG_IN_20, ... G1 == DIG_IN_16
                         * .......0 G0 = INPUT (run/stop switch)
                         */
#define PORTG_DEFAULT    0b00000000  /* inputs, don't care */

#define RUNSTOP_SWITCH PING.0
#ifdef POSITIVE_INPUT_LOGIC
   #define RUNSTOP_RUN  1
   #define RUNSTOP_STOP 0
#else
   #define RUNSTOP_RUN  0
   #define RUNSTOP_STOP 1
#endif

#define DIG_IN_0   PINC.0
#define DIG_IN_1   PINC.1
#define DIG_IN_2   PINC.2
#define DIG_IN_3   PINC.3
#define DIG_IN_4   PINC.4
#define DIG_IN_5   PINC.5
#define DIG_IN_6   PINC.6