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/Users/fmalpartida/development/ardWorkspace/LiquidCrystal_I2C/LiquiCrystal_I2C/FastIO.h
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    00001 // ---------------------------------------------------------------------------
    00002 // Created by Florian Fida on 20/01/12
    00003 // Copyright 2012 - Under creative commons license 3.0:
    00004 //        Attribution-ShareAlike CC BY-SA
    00005 //        http://creativecommons.org/licenses/by-sa/3.0/
    00006 //
    00007 // This software is furnished "as is", without technical support, and with no
    00008 // warranty, express or implied, as to its usefulness for any purpose.
    00009 // ---------------------------------------------------------------------------
    00010 // fio_shiftOut1 functions are based on Shif1 protocol developed by Roman Black
    00011 // (http://www.romanblack.com/shift1.htm)
    00012 //
    00013 // Thread Safe: No
    00014 // Extendable: Yes
    00015 //
    00016 // @file FastIO.h
    00017 // This file implements basic fast IO routines.
    00018 //
    00019 // @brief
    00020 //
    00021 // @version API 1.0.0
    00022 //
    00023 // @author Florian Fida -
    00024 // 2012-03-16 bperrybap mods for chipkit32 (pic32) Arduino
    00025 //  support chipkit:
    00026 // (https://github.com/chipKIT32/chipKIT32-MAX/blob/master/hardware/pic32/
    00027 //   cores/pic32/wiring_digital.c)
    00028 // ---------------------------------------------------------------------------
    00029 #ifndef _FAST_IO_H_
    00030 #define _FAST_IO_H_
    00031
    00032 #if (ARDUINO <  100)
    00033 #include <WProgram.h>
    00034 #else
    00035 #include <Arduino.h>
    00036 #endif
    00037
    00038 #include <pins_arduino.h> // pleasing sanguino core
    00039 #include <inttypes.h>
    00040
    00041
    00042 #define SKIP 0x23
    00043
    00044 #if defined (__AVR__)
    00045 #include <util/atomic.h> // for critical section management
    00046 typedef uint8_t fio_bit;
    00047 typedef volatile uint8_t *fio_register;
    00048
    00049
    00050 #elif defined(__PIC32MX__)
    00051 typedef uint32_t fio_bit;
    00052 typedef volatile uint32_t *fio_register;
    00053
    00054
    00055 #else
    00056 // fallback to Arduino standard digital i/o routines
    00057 #define FIO_FALLBACK
    00058 #define ATOMIC_BLOCK(dummy) if(true)
    00059 #define ATOMIC_RESTORESTATE
    00060 typedef uint8_t fio_bit;
    00061 typedef uint8_t fio_register;
    00062 #endif
    00063
    00064
    00065
    00066 #if !defined(FIO_FALLBACK) && !defined(ATOMIC_BLOCK)
    00067 /*
    00068  * Define an ATOMIC_BLOCK that implements ATOMIC_FORCEON type
    00069  * Using the portable Arduino interrupts() and noInterrupts()
    00070  */
    00071 #define ATOMIC_RESTORESTATE ATOMIC_FORCEON // sorry, no support for save/restore yet.
    00072 #define ATOMIC_FORCEON uint8_t sreg_save \
    00073               __attribute__((__cleanup__(__iSeiParam))) = 0
    00074
    00075 static __inline__ uint8_t __iCliRetVal(void)
    00076 {
    00077         noInterrupts();
    00078         return(1);
    00079 }
    00080 static __inline__ void __iSeiParam(const uint8_t *__s)
    00081 {
    00082         interrupts();
    00083 }
    00084 #define ATOMIC_BLOCK(type) for(type,  __Todo = __iCliRetVal(); __Todo; __Todo = 0)
    00085
    00086 #endif // end of block to create compatible ATOMIC_BLOCK()
    00087
    00088
    00089
    00097 fio_register fio_pinToOutputRegister(uint8_t pin, uint8_t initial_state = LOW);
    00098
    00106 fio_register fio_pinToInputRegister(uint8_t pin);
    00107
    00115 fio_bit fio_pinToBit(uint8_t pin);
    00116
    00117
    00127 // __attribute__ ((always_inline)) /* let the optimizer decide that for now */
    00128 void fio_digitalWrite ( fio_register pinRegister, fio_bit pinBit, uint8_t value );
    00129
    00136 #ifndef FIO_FALLBACK
    00137 #define fio_digitalWrite_LOW(reg,bit) *reg &= ~bit
    00138 #define fio_digitalWrite_HIGH(reg,bit) *reg |= bit
    00139 #define fio_digitalWrite_SWITCH(reg,bit) *reg ^= bit
    00140 #define fio_digitalWrite_SWITCHTO(reg,bit,val) fio_digitalWrite_SWITCH(reg,bit)
    00141 #else
    00142 // reg -> dummy NULL, bit -> pin
    00143 #define fio_digitalWrite_HIGH(reg,bit) digitalWrite(bit,HIGH)
    00144 #define fio_digitalWrite_LOW(reg,bit) digitalWrite(bit,LOW)
    00145 #define fio_digitalWrite_SWITCH(reg,bit) digitalWrite(bit, !digitalRead(bit))
    00146 #define fio_digitalWrite_SWITCHTO(reg,bit,val) digitalWrite(bit,val);
    00147 #endif
    00148
    00158 int fio_digitalRead ( fio_register pinRegister, fio_bit pinBit );
    00159
    00171 void fio_shiftOut( fio_register dataRegister, fio_bit dataBit, fio_register clockRegister,
    00172                   fio_bit clockBit, uint8_t value, uint8_t bitOrder );
    00173
    00184 void fio_shiftOut(fio_register dataRegister, fio_bit dataBit, fio_register clockRegister, fio_bit clockBit);
    00185
    00194 void fio_shiftOut1(fio_register shift1Register, fio_bit shift1Bit, uint8_t value, boolean noLatch = false);
    00202 void fio_shiftOut1(uint8_t pin, uint8_t value, boolean noLatch = false);
    00210 void fio_shiftOut1_init(fio_register shift1Register, fio_bit shift1Bit);
    00217 void fio_shiftOut1_init(uint8_t pin);
    00218
    00219 #endif // FAST_IO_H

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